CN118257303A - Pile foundation detection device and detection method for engineering detection - Google Patents
Pile foundation detection device and detection method for engineering detection Download PDFInfo
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- CN118257303A CN118257303A CN202410675186.4A CN202410675186A CN118257303A CN 118257303 A CN118257303 A CN 118257303A CN 202410675186 A CN202410675186 A CN 202410675186A CN 118257303 A CN118257303 A CN 118257303A
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- 238000012360 testing method Methods 0.000 claims abstract description 61
- 210000001503 joint Anatomy 0.000 claims abstract description 26
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/18—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring depth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention provides a pile foundation detection device and a pile foundation detection method for engineering detection, which are used for measuring the linear size of pile foundation settlement in a single pile vertical compression-resistant static load test; a sensor kit for measuring the linear size of the settlement of a single measuring point on the surface of the pile foundation; the sensor suite comprises a measuring point assembly connected with the pile foundation, a measuring assembly connected with the measuring point assembly and used for measuring the displacement of the measuring point assembly, and an operation unit used for measuring the settlement linear size of the pile foundation; the operation unit calculates the linear size of pile foundation settlement according to the rotation angle of the butt joint unit; by using the pile foundation detection device for engineering detection and the pile foundation settlement linear dimension detection method, the linear dimension of pile foundation settlement can be measured, and the influence of load on the pressure imbalance of the test pile is eliminated.
Description
Technical Field
The invention belongs to the technical field of linear dimension metering equipment, relates to angle metering technology, and particularly relates to a pile foundation detection device and method for engineering detection.
Background
The single pile vertical compression-resistant static load experiment is an experiment method for researching the bearing performance of a pile foundation under vertical stress. In the experiment, the test pile is embedded into the soil body, then vertical downward static load is applied, and the bearing capacity and deformation characteristics of the pile foundation are evaluated by measuring parameters such as settlement and strain of the pile body. The experimental method can be used for determining the ultimate bearing capacity of the pile foundation, the stress and strain relation of the pile body, the deformation characteristic of the pile body and the like, and has important significance for the design of the pile foundation and the research of geotechnical materials.
The test pile for the single pile vertical compression-resistant static load test is usually a reinforced concrete pile or a precast pile with a round or square section. The test pile is embedded into the soil body, and the pile body is usually installed by using equipment such as a vibrating hammer or a hydrostatic press. The load may be gradually increased by applying a vertical downward dead load by hydraulic or mechanical means until a predetermined load level is reached. In the process of applying the load, the change of parameters such as settlement, strain, stress and the like of the pile body is monitored through a measuring instrument and a sensor. And obtaining parameters such as bearing capacity, stress, strain relation, deformation characteristics and the like of the pile foundation according to experimental data.
In the prior art, a bearing plate is generally arranged on a test pile, then a load is applied to the bearing plate, the settlement of the bearing plate is observed through a dial indicator arranged above the bearing plate, and finally the settlement size of the pile foundation is obtained.
However, the pressure applied to the pile foundation by the load is not vertically downward due to uneven contact surface of the pile foundation and the jack, load balancing problem, etc., which may cause the pile foundation to incline, resulting in that the measurement result is not prepared.
Disclosure of Invention
Based on the above, an object of the present invention is to provide a pile foundation detection device for engineering detection, which is used for measuring the linear size of pile foundation settlement in a single pile vertical compression static load test; the pile foundation detection device for engineering detection comprises a sensor suite for measuring the settlement linear size of a single measuring point on the surface of a pile foundation;
The sensor suite comprises a measuring point assembly connected with the pile foundation, a measuring assembly connected with the measuring point assembly and used for measuring the displacement of the measuring point assembly, and an operation unit used for measuring the settlement linear size of the pile foundation;
The measuring point assembly can be fixed on the surface of the pile foundation, a butt joint unit is arranged between the measuring assembly and the measuring point assembly, and the measuring assembly detects the rotation angle of the butt joint unit;
And the operation unit calculates the linear size of pile foundation settlement according to the rotation angle of the butt joint unit.
Preferably, the metering assembly comprises a vertical rotating bracket with a vertical rotating shaft, and the vertical rotating bracket comprises a vertical fixed seat and a vertical movable seat; the vertical rotating shaft is connected with the vertical fixing seat and the vertical movable seat, and the vertical movable seat can rotate relative to the vertical fixing seat in the vertical direction;
the metering assembly further comprises a vertical angle sensor which is arranged on the vertical fixing seat and connected with the vertical rotating shaft, the vertical movable seat is connected with the docking unit, and the vertical angle sensor is used for detecting the rotating angle of the docking unit in the vertical direction.
Preferably, the pile foundation detection device for engineering detection comprises a plurality of measuring point assemblies and metering assemblies with the same number as the measuring point assemblies;
The measuring point assemblies are respectively arranged on the surfaces with different positions on the same pile foundation, and the measuring point assemblies are respectively connected with the corresponding measuring point assemblies through the butt joint units;
The operation unit obtains the rotation angles of the plurality of butt joint units and the relative distance between the measuring point assembly and the metering assembly, and calculates the linear size of pile foundation settlement.
Preferably, the metering assembly further comprises a horizontal rotating bracket with a horizontal rotating shaft, and the horizontal rotating bracket comprises a horizontal fixed seat and a horizontal movable seat; the horizontal rotating shaft is connected with the horizontal fixing seat and the horizontal movable seat, and the horizontal movable seat can rotate relative to the horizontal fixing seat in the horizontal direction;
The metering assembly further comprises a horizontal angle sensor which is arranged on the horizontal fixing seat and connected with the horizontal rotating shaft, the horizontal movable seat is connected with the docking unit, and the horizontal angle sensor is used for detecting the rotating angle of the docking unit in the horizontal direction.
Preferably, the proximal end of the docking unit is connected with the metering assembly, and the distal end of the docking unit is connected with the measuring point assembly;
the proximal end of the docking unit is provided with a distance sensor and a sleeve arranged at the side edge of the distance sensor, the docking unit comprises a docking rod, one end of the docking rod is arranged in the sleeve, and the docking rod can move along the axial direction of the sleeve; the other end of the butt joint rod is provided with a ball head for connecting the measuring point assembly;
The distance sensor is connected with the horizontal movable seat and the vertical movable seat and is used for measuring the distance between the metering assembly and the measuring point assembly.
Preferably, the measuring point assembly comprises a hemispherical shell with a hollow inside and an inner shell arranged in the hemispherical shell, and an arc-shaped groove is arranged between the hemispherical shell and the inner shell;
One end of the butt joint unit penetrates through the hemispherical shell, the end part of the butt joint unit is arranged in the arc-shaped groove, and the butt joint unit can rotate around the spherical center of the hemispherical shell in the hemispherical shell.
Preferably, the measuring point assembly further comprises a supporting plate arranged on the outer side of the hemispherical shell, a supporting chute and a supporting sliding block arranged in the supporting chute are arranged on the supporting plate, and the supporting sliding block can translate in the supporting chute;
the supporting plates are arranged on two sides of the hemispherical shell, supporting sliding grooves and supporting sliding blocks are arranged on two sides of the hemispherical shell, and the supporting sliding blocks are used for being in contact with the circumferential surface of the pile foundation, so that the spherical center of the hemispherical shell is kept on the outer surface of the circumferential surface of the pile foundation;
the pile foundation detection device for engineering detection is characterized in that a plurality of measuring point components are connected through binding bands, and two ends of each binding band are connected with supporting plates of two adjacent measuring point components; the binding belt is provided with a tightening device for tightening the binding belt.
Preferably, the pile foundation detection device for engineering detection further comprises a bracket body for installing a sensor suite; the support body includes the support horizontal pole and sets up the supporting leg at support horizontal pole both ends, and the sensor external member sets up on the support horizontal pole.
Another object of the present invention is to provide a pile foundation settlement linear dimension detection method for a pile foundation detection device for engineering detection, the pile foundation settlement linear dimension detection method comprising:
Establishing a measuring point SA arranged on the outer surface of the pile foundation, and enabling a metering assembly QA to be aligned with the measuring point SA;
acquiring an angle variation QA N of a metering assembly QA;
And calculating the linear size of pile foundation settlement according to the angle variation QA N.
Preferably, the pile foundation settlement linear dimension detection method comprises the following steps:
establishing a coordinate system O, wherein the Z axis of the coordinate system O is parallel to the axis of the pile foundation;
a measuring point SA, a measuring point SB and a measuring point SC are established on the outer surface of the pile foundation;
aligning the measuring assembly QA, the measuring assembly QB and the measuring assembly QC with the measuring point SA, the measuring point SB and the measuring point SC respectively, and acquiring measuring parameters of the measuring assembly QA, the measuring assembly QB and the measuring assembly QC;
The metering parameters comprise relative angles of the metering component and the corresponding measuring points in the X direction and the Y direction in the coordinate system O, and the distance between the metering component and the corresponding measuring points;
Calculating coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O according to the metering parameters to obtain initial coordinates SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
Establishing a zero point plane according to an initial coordinate SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
in the compression-resistant static load test, measuring parameters of a measuring assembly QA, a measuring assembly QB and a measuring assembly QC are obtained, and coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O are respectively measured point coordinates SA N, measured point coordinates SB N and measured point coordinates SC N;
Establishing a measuring point plane according to the measuring point coordinates;
and calculating the pile foundation settlement linear dimension according to the zero point plane and the measuring point plane.
According to the pile foundation detection device for engineering detection and the pile foundation settlement linear dimension detection method, the linear dimension of pile foundation settlement can be measured. The unbalanced pressure of load to test pile can lead to the direction of pile foundation subsidence and the direction of pile foundation axis not collineation, finally causes the numerical value that each point measured on the bearing plate inconsistent, influences the accuracy of load test.
Based on the above, the pile foundation detection device and the pile foundation settlement linear dimension detection method for engineering detection can measure the linear dimension of pile foundation settlement and eliminate the influence of load on the pressure imbalance of a test pile.
Drawings
The disclosure includes the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate various exemplary embodiments, features and aspects of the disclosure and together with the description, serve to explain the principles of the disclosure. The present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings. Wherein:
FIG. 1 is a view showing a state of use of a pile foundation detection device for engineering detection according to an embodiment of the present invention;
FIG. 2 is a schematic view of a support leg and a support rail of a pile foundation detection device for engineering detection according to an embodiment of the present invention;
FIG. 3 is a schematic view of a bracket body of a pile foundation detection device for engineering detection according to an embodiment of the invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic diagram of a sensor suite of a pile foundation detection device for engineering detection according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a measurement point assembly of a pile foundation detection device for engineering detection according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a measurement point assembly of a pile foundation detection device for engineering detection according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a coordinate system O and a measuring point of a pile foundation settlement linear dimension detection method according to an embodiment of the invention;
FIG. 9 is a schematic diagram of the measurement parameters of a method for detecting the linear dimension of pile foundation settlement according to an embodiment of the invention;
FIG. 10 is a schematic view of a zero point plane and a measuring point plane of a method for detecting the linear dimension of pile foundation settlement according to an embodiment of the invention;
Wherein: the measuring point assembly 11, the metering assembly 12, the test pile 13, the supporting cross bar 14, the supporting leg 15, the mounting seat 16, the bearing plate 17, the jack 18, the girder 19, the trabecula 191, the load 192, the vertical rotation shaft 21, the vertical fixing seat 22, the vertical movable seat 23, the vertical angle sensor 24, the angle amplifying unit 25, the horizontal rotation shaft 31, the horizontal fixing seat 32, the horizontal movable seat 33, the horizontal angle sensor 34, the distance sensor 41, the sleeve 42, the docking rod 43, the hemispherical shell 51, the inner shell 52, the supporting plate 53, the supporting chute 54, the supporting slide block 55, the arc groove 56, the binding belt 61 and the tightening device 62.
Detailed Description
The technical scheme of the present invention will be described in further detail below by way of examples with reference to the accompanying drawings, but the present invention is not limited to the following examples.
The single pile vertical compression static load 192 experiment is an experiment method for researching the bearing performance of a pile foundation under vertical stress. In the experiment, the test pile 13 is embedded into the soil body, then a vertical downward static load 192 is applied, and the bearing capacity and deformation characteristics of the pile foundation are evaluated by measuring parameters such as settlement and strain of the pile body. The experimental method can be used for determining the ultimate bearing capacity of the pile foundation, the stress and strain relation of the pile body, the deformation characteristic of the pile body and the like, and has important significance for the design of the pile foundation and the research of geotechnical materials.
The test pile 13 for the single pile vertical compression static load 192 test is typically a reinforced concrete pile or precast pile of circular or square cross section. The test pile 13 is inserted into the soil body, and it is usually necessary to install the pile body by using a device such as a vibrating hammer or a hydrostatic machine. The load 192 may be gradually increased by applying a vertical downward dead load 192 by hydraulic or mechanical means until a predetermined load level is reached. During the application of load 192, changes in parameters such as pile body settlement, strain, stress, etc. are monitored by measuring instruments and sensors. And obtaining parameters such as bearing capacity, stress, strain relation, deformation characteristics and the like of the pile foundation according to experimental data.
In the prior art, a bearing plate 17 is generally arranged on a test pile 13, then a load 192 is applied to the bearing plate 17, and the settlement of the bearing plate 17 is observed through a dial gauge arranged above the bearing plate 17, so that the settlement size of the pile foundation is finally obtained.
In order to solve the problems, an object of the present invention is to provide a pile foundation detection device for engineering detection, which is used for measuring the linear size of pile foundation settlement in a single pile vertical compression static test; the pile foundation detection device for engineering detection comprises a sensor suite for measuring the settlement linear size of a single measuring point on the surface of a pile foundation;
the sensor suite comprises a measuring point assembly 11 connected with the pile foundation, a measuring assembly 12 connected with the measuring point assembly 11 and used for measuring the displacement of the measuring point assembly 11, and an operation unit used for measuring the settlement linear size of the pile foundation;
The measuring point assembly 11 can be fixed on the surface of the pile foundation, a butt joint unit is arranged between the measuring assembly 12 and the measuring point assembly 11, and the measuring assembly 12 detects the rotation angle of the butt joint unit;
And the operation unit calculates the linear size of pile foundation settlement according to the rotation angle of the butt joint unit.
In this embodiment, the single pile vertical compression static load 192 test is to apply a vertical downward load 192 on the test pile 13, and measure the linear sedimentation size of the test pile 13 by a measuring instrument.
As shown in fig. 1 and 2, the pile foundation detection device for engineering detection further includes a bracket body for mounting a sensor suite; the bracket body comprises a support cross bar 14 and support legs 15 arranged at two ends of the support cross bar 14, and the sensor suite is arranged on the support cross bar 14.
In the concrete realization process, the support body still includes annular mount pad 16, and the mount pad 16 cup joints in the outside of experimental stake 13, and the sensor external member sets up on mount pad 16, and supporting leg 15 is used for connecting ground and support horizontal pole 14, and the connecting portion of supporting leg 15 and support horizontal pole 14 is provided with high adjusting device, can adjust the height of support horizontal pole 14 for the ground, and then adjusts the position of sensor external member at experimental stake 13.
The top of test pile 13 is provided with bearing plate 17, and bearing plate 17 is used for balanced load 192 to test pile 13 applied pressure, prevents that the pressure from concentrating and damaging test pile 13's surface.
The measuring point assembly may also be arranged on the bearing plate 17.
The bearing plate 17 is provided with a jack 18, a girder 19 is arranged above the jack 18, a plurality of trabeculae 191 can be arranged on the girder 19, and a load 192 is placed on the trabeculae 191. Supporting blocks are arranged below two ends of the trabecula 191, the trabecula 191 and the load 192 are firstly placed on the supporting blocks, then the girder 19 is pushed to lift up the trabecula 191 through the adjusting jack 18, and partial load is applied to the test pile 13.
The sensor suite comprises a measuring point assembly 11 connected with the pile foundation and a metering assembly 12 connected with the measuring point assembly 11 and used for metering the displacement of the measuring point assembly 11. The measuring point assembly 11 can be fixed on the surface of the pile foundation, a butt joint unit is arranged between the measuring assembly 12 and the measuring point assembly 11, and the measuring assembly 12 detects the rotation angle of the butt joint unit.
As shown in fig. 3, the measuring point assembly 11 is disposed on the surface of the test pile 13, the measuring point assembly 11 can form a measuring point on the surface of the test pile 13, the measuring point is relatively fixed to the test pile 13, and the measuring point assembly 11 also moves along with the measuring point. The metering assembly 12 is fixed on the mounting seat 16, the metering assembly 12 is connected with the measuring point assembly 11 through a butt joint unit, the butt joint unit can be a connecting rod, one end of the connecting rod is connected with the metering assembly 12, and the other end of the connecting rod is connected with the measuring point assembly 11.
The load 192 applies pressure to the test pile 13, causing the test pile 13 to settle, thereby causing the measurement point to move downward and the docking unit to rotate. Thus, the metering assembly 12 may be a sensor, such as an encoder, for metering the angle of rotation. The calculation unit calculates the rotation angle of the docking unit from the signal of the encoder, and if the length of the docking unit is known, can calculate the linear size of the subsidence of the test pile 13.
Preferably, the circular mounting 16 comprises two semi-circular components connected by a fastener.
Since this embodiment proposes a new way of measuring the sedimentation linear dimension of the test pile 13, the bearing plate 17 and the jack 18 are usually placed on the test pile 13 first, and then the annular mounting seat 16 is spliced and sleeved outside the test pile 13.
Further, the metering assembly 12 comprises a vertical rotating bracket with a vertical rotating shaft 21, and the vertical rotating bracket comprises a vertical fixed seat 22 and a vertical movable seat 23; the vertical rotating shaft 21 is connected with a vertical fixed seat 22 and a vertical movable seat 23, and the vertical movable seat 23 and the vertical fixed seat 22 can rotate relatively in the vertical direction;
The metering assembly 12 further comprises a vertical angle sensor 24 which is arranged on the vertical fixing seat 22 and connected with the vertical rotating shaft 21, the vertical movable seat 23 is connected with the docking unit, and the vertical angle sensor 24 is used for detecting the rotating angle of the docking unit in the vertical direction.
In this embodiment, as shown in fig. 3 and 7, the docking unit is connected to the vertical movable seat 23, the vertical movable seat 23 follows the docking unit to rotate, and the vertical movable seat 23 and the vertical fixed seat 22 relatively rotate through the vertical rotation shaft 21. The vertical movable seat 23 of the present embodiment is connected to the vertical rotation shaft 21, and the vertical angle sensor 24 is used to detect the rotation angle of the vertical rotation shaft 21.
Preferably, the vertical angle sensor 24 may be an encoder capable of detecting a rotation angle of the vertical rotation shaft 21, and an angle amplifying unit 25 is further disposed between the vertical angle sensor 24 and the vertical rotation shaft 21.
In a specific implementation process, the angle amplifying unit 25 may be a transmission device formed by multiple stages of planetary gears, and amplifies the rotation angle of the vertical rotation shaft 21. The angle amplifying unit 25 enables the vertical angle sensor 24 to sensitively detect the settlement of the test pile 13 due to the small size of the settlement of the test pile 13.
Further, the pile foundation detection device for engineering detection comprises a plurality of measuring point assemblies 11 and metering assemblies 12 with the same number as the measuring point assemblies 11;
The measuring point assemblies 11 are respectively arranged on the surfaces with different positions on the same pile foundation, and the measuring point assemblies 12 are respectively connected with the corresponding measuring point assemblies 11 through the butt joint units;
the operation unit obtains the rotation angles of the plurality of butt joint units and the relative distance between the measuring point assembly 11 and the metering assembly 12, and calculates the linear size of pile foundation settlement.
In this embodiment, as shown in fig. 3, 5 and 7, the number of the measuring point assemblies 11 and the measuring assemblies 12 is three, three measuring points are configured on the test pile 13, and meanwhile, the influence of the load 192 on the pressure imbalance of the test pile 13 can be eliminated by monitoring the linear dimensions of the settlement of the three measuring points.
The imbalance in pressure of the load 192 against the test pile 13 may be such that the jack is at an angle to the contact surface of the test pile 13, and thus the pressure exerted by the load 192 against the test pile 13 is not vertically downward, but is also at an angle of inclination, causing the test pile to tilt.
The pressure imbalance of the load 192 to the test pile 13 causes the test pile 13 not to vertically descend and incline, whether the test pile 13 vertically subsides or not cannot be judged by a single measuring point, a plane can be established by the three measuring points, and the actual linear size of the test pile 13 subsides can be obtained by comparing the planes before and after subsidence.
In a specific implementation, three measuring point assemblies 11 may be disposed at three points on the circumference of the test pile 13 at the same height, and three metering assemblies 12 are disposed on the mounting base 16.
The three measuring point assemblies 11 and the three metering assemblies 12 may be uniformly disposed at intervals of 120 degrees in the circumferential direction.
Further, the metering assembly 12 further comprises a horizontal rotating bracket with a horizontal rotating shaft 31, and the horizontal rotating bracket comprises a horizontal fixed seat 32 and a horizontal movable seat 33; the horizontal rotating shaft 31 is connected with the horizontal fixed seat 32 and the horizontal movable seat 33, and the horizontal movable seat 33 can rotate relative to the horizontal fixed seat 32 in the horizontal direction;
The metering assembly 12 further comprises a horizontal angle sensor 34 which is arranged on the horizontal fixing seat 32 and is connected with the horizontal rotating shaft 31, the horizontal movable seat 33 is connected with the docking unit, and the horizontal angle sensor 34 is used for detecting the rotating angle of the docking unit in the horizontal direction.
In this embodiment, the horizontal rotation support is to facilitate the setting of the mounting seat 16 and the setting of the measuring point assembly 11, as shown in fig. 8 and 9, the fixing of the measuring point assembly 11 to the test pile 13 cannot ensure that the measuring point assembly 11 and the measuring assembly 12 are at the same radial angle, and the docking unit generates tangential force and further generates resistance.
The horizontal rotating support can reduce the accuracy requirement for installing the measuring point assembly 11, and the horizontal rotating support can follow the measuring point assembly 11 to deflect in the horizontal direction. The docking unit is connected with a horizontal movable seat 33, the horizontal movable seat 33 is connected with a horizontal fixed seat 32 through a horizontal rotating shaft 31, and the horizontal rotating shaft 31 can rotate along with the horizontal movable seat 33.
The horizontal angle sensor 34 connected to the horizontal rotation shaft 31 can measure the angle of rotation of the docking unit in the horizontal direction.
In a specific implementation process, the horizontal rotating bracket and the vertical rotating bracket can be mutually arranged, as shown in fig. 5, the vertical fixing seat 22 of this example is connected with the mounting seat 16, the vertical movable seat 23 is connected with the horizontal fixing seat 32, and the horizontal movable seat 33 is connected with the connecting unit.
Further, the proximal end of the docking unit is connected with the metering assembly 12, and the distal end of the docking unit is connected with the measuring point assembly 11;
The proximal end of the docking unit is provided with a distance sensor 41 and a sleeve 42 arranged on the side edge of the distance sensor 41, the docking unit comprises a docking rod 43, one end of the docking rod 43 is arranged in the sleeve 42, and the docking rod 43 can move along the axial direction of the sleeve 42; the other end of the docking rod 43 is provided with a ball head for connecting the measuring point assembly 11;
A distance sensor 41 is connected to the horizontal movable mount 33 and the vertical movable mount 33, the distance sensor 41 being used to measure the distance between the gauge assembly 12 and the measuring point assembly 11.
In this embodiment, as shown in fig. 3 and 5, the distance between the measuring point assembly 11 and the measuring assembly 12 will change, so that the docking unit can connect the measuring point assembly 11 and the measuring assembly 12 at any time, the docking unit is a telescopic sleeve, the telescopic operation is realized by the relative movement of the docking rod 43 and the sleeve 42, the sleeve 42 is connected with the horizontal movable seat 33, and the docking rod 43 is inserted into the sleeve 42.
A distance sensor 41 is provided on the horizontal movable seat 33, the distance sensor 41 being a distance sensor 41 of a laser which can be emitted through the measuring point assembly 11 onto the measuring point of the test pile 13.
The ball head is designed to accommodate relative rotation of the measurement point assembly 11 and the docking rod 43.
Further, the measuring point assembly 11 includes a hemispherical shell 51 having a hollow interior, an inner shell 52 disposed inside the hemispherical shell 51, and an arc groove 56 disposed between the hemispherical shell 51 and the inner shell 52;
One end of the docking unit passes through the hemispherical shell 51, the end of the docking unit is arranged in the arc-shaped groove 56, and the docking unit can rotate around the sphere center of the hemispherical shell 51 in the hemispherical shell 51.
In this embodiment, a specific implementation manner of the measuring point assembly 11 is provided, as shown in fig. 6, the ball of the docking unit is hemispherical, the ball is disposed in the arc-shaped slot 56 between the hemispherical shell 51 and the inner shell 52, and the docking unit and the measuring point assembly 11 can rotate relatively.
Further, the measuring point assembly 11 further comprises a supporting plate 53 arranged outside the hemispherical shell 51, a supporting sliding groove 54 and a supporting sliding block 55 arranged in the supporting sliding groove 54 are arranged on the supporting plate 53, and the supporting sliding block 55 can translate in the supporting sliding groove 54;
The supporting plates 53 are arranged on two sides of the hemispherical shell 51, the two sides of the hemispherical shell 51 are provided with supporting sliding grooves 54 and supporting sliding blocks 55, and the supporting sliding blocks 55 are used for being in contact with the circumferential surface of the pile foundation, so that the spherical center of the hemispherical shell 51 is kept on the outer surface of the circumferential surface of the pile foundation;
the pile foundation detection device for engineering detection is characterized in that a plurality of measuring point assemblies 11 are connected through a binding belt 61, and two ends of the binding belt 61 are connected with support plates 53 of two adjacent measuring point assemblies 11; the band 61 is provided with tightening means 62 for tightening the band 61.
In this embodiment, as shown in fig. 3, 5 and 6, support plates 53 are further disposed on two sides of the hemispherical shell 51, and support blocks 55 are used for contacting the test pile 13, and the support blocks can adjust the distance between the hemispherical shell 51 and the surface of the test pile 13, so that the measuring point on the surface of the test pile 13 is co-located with the center of the sphere of the hemispherical shell 51.
The position of the supporting sliding block 55 in the supporting sliding groove 54 is adjusted, so that the test piles 13 with different diameters can be adapted.
The binding band 61 and the tightening device 62 fix the plurality of measuring point assemblies 11 on the surface of the test pile 13, the structure of the binding band 61 and the tightening device 62 is as shown in fig. 4, and the ratchet structure is arranged on the tightening device 62 to ensure that the binding band 61 is tightened and the measuring point assemblies 11 are firmly fixed on the test pile 13.
Another object of the present invention is to provide a pile foundation settlement linear dimension detection method for a pile foundation detection device for engineering detection, the pile foundation settlement linear dimension detection method comprising:
Establishing a measuring point SA arranged on the outer surface of the pile foundation, and enabling a metering assembly QA to be aligned with the measuring point SA;
acquiring an angle variation QA N of a metering assembly QA;
And calculating the linear size of pile foundation settlement according to the angle variation QA N.
The embodiment provides a method for measuring the settlement linear size of a pile foundation by using a single sensor suite.
The measurement point SA is the center of sphere of the hemispherical shell 51 of the measurement point assembly 11 and is also the measurement point of the distance sensor 41. The alignment measurement point SA of the metrology assembly QA refers to the alignment measurement point SA of the laser light emitted from the distance sensor 41. The angle change QA N of the gauge assembly QA refers to the rotation angle of the vertical movable base 23. The distance between the measuring point SA and the metering assembly QA is a known value, and the pile foundation settlement linear size can be calculated according to the angle change QA N.
Further, the pile foundation settlement linear dimension detection method comprises the following steps:
establishing a coordinate system O, wherein the Z axis of the coordinate system O is parallel to the axis of the pile foundation;
a measuring point SA, a measuring point SB and a measuring point SC are established on the outer surface of the pile foundation;
aligning the measuring assembly QA, the measuring assembly QB and the measuring assembly QC with the measuring point SA, the measuring point SB and the measuring point SC respectively, and acquiring measuring parameters of the measuring assembly QA, the measuring assembly QB and the measuring assembly QC;
The metering parameters comprise the relative angles of the metering component 12 and the corresponding measuring points in the X direction and the Y direction in the coordinate system O, and the distance between the metering component 12 and the corresponding measuring points;
Calculating coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O according to the metering parameters to obtain initial coordinates SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
Establishing a zero point plane according to an initial coordinate SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
in the compression-resistant static load test, measuring parameters of a measuring assembly QA, a measuring assembly QB and a measuring assembly QC are obtained, and coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O are respectively measured point coordinates SA N, measured point coordinates SB N and measured point coordinates SC N;
Establishing a measuring point plane according to the measuring point coordinates;
and calculating the pile foundation settlement linear dimension according to the zero point plane and the measuring point plane.
The embodiment provides a method for measuring the settlement linear size of pile foundations by using three sensor suite.
Fig. 5 shows the structure of the measuring units 12 and the connection relationship between the measuring units 12 and the measuring points, wherein in each measuring unit 12, the connection line between the distance sensor 41 and the measuring point is an X-axis, the axis of the horizontal rotation shaft 31 is a Y-axis, and the axis of the vertical rotation shaft is a Z-axis.
Before the load 192 is applied, the origin of the coordinate system O may be on the axis of the test pile 13, as shown in fig. 8. In a specific implementation process, since the metering assembly QA, the metering assembly QB, and the metering assembly QC are disposed on the mounting base 16, the distance sensors 41 of the metering assembly QA, the metering assembly QB, and the metering assembly QC are relatively stationary with respect to the mounting base 16, so that the positions of the metering assembly QA, the metering assembly QB, and the metering assembly QC in the coordinate system O are fixed, which may be preset values. In addition, the angles of the metering assembly QA, the metering assembly QB and the metering assembly QC are calibrated, and when the X axis, the Y axis and the Z axis are mutually perpendicular, the angles are mutually 90 degrees.
The measuring points SA, SB and SC are established on the outer surface of the pile foundation, and according to the positions of the measuring components QA, QB and QC in the coordinate system O, the relative angles of the measuring components 12 and the corresponding measuring points in the X direction and Y direction in the coordinate system O and the distance between the measuring components 12 and the corresponding measuring points, as well as the measuring parameters, in FIG. 9, CAH is the angle value measured by the horizontal angle sensor 34, and CHV is the angle value measured by the vertical angle sensor 24. The coordinates of the measurement point SA, the measurement point SB, and the measurement point SC in the coordinate system O can be calculated as initial coordinates SA 0, initial coordinates SB 0, and initial coordinates SC 0, respectively.
The zero point plane can be determined from initial coordinates SA 0, SB 0, and SC 0. The zero plane is the reference plane before the load 192 is applied.
At this time, a load 192 can be applied to the test pile 13, and after a period of time, the measurement parameters are acquired to obtain a measurement point coordinate SA N, a measurement point coordinate SB N and a measurement point coordinate SC N; the measurement point coordinates establish a measurement point plane.
And calculating the distance between the plane of the measuring point and the zero point plane to obtain the linear size of pile foundation settlement.
Preferably, as shown in FIG. 10, the measurement may be performed multiple times after the load 192 is applied.
A period of time after the load 192 is applied, measurement point coordinates SA 1, measurement point coordinates SB 1, measurement point coordinates SC 1 are obtained; the first measurement point plane is calculated based on measurement point coordinates SA 1, measurement point coordinates SB 1, and measurement point coordinates SC 1.
Obtaining a measuring point coordinate SA 2, a measuring point coordinate SB 2 and a measuring point coordinate SC 2 after a period of time; a second measurement point plane is calculated based on measurement point coordinates SA 2, measurement point coordinates SB 2, and measurement point coordinates SC 2.
Based on the above information, the linear dimensions of the first measurement point plane and the second measurement point plane relative to the zero point plane can be obtained, respectively.
The foregoing description of the disclosed embodiments of the invention is illustrative, and not exhaustive, of the scope of the invention and is not limited to the embodiments described above. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the spirit and scope of the invention. That is, various changes and modifications in form and detail may be made by one skilled in the art, which are deemed to fall within the scope of the present invention. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. The pile foundation detection device for engineering detection is used for measuring the settlement linear size of the pile foundation in a single pile vertical compression static load test; the method is characterized in that: the pile foundation detection device for engineering detection comprises a sensor suite for measuring the settlement linear size of a single measuring point on the surface of a pile foundation;
The sensor suite comprises a measuring point assembly (11) connected with the pile foundation, a measuring assembly (12) connected with the measuring point assembly (11) and used for measuring the displacement of the measuring point assembly (11), and an operation unit used for measuring the settlement linear size of the pile foundation;
The measuring point assembly (11) can be fixed on the surface of the pile foundation, a butt joint unit is arranged between the measuring assembly (12) and the measuring point assembly (11), and the measuring assembly (12) detects the rotation angle of the butt joint unit;
And the operation unit calculates the linear size of pile foundation settlement according to the rotation angle of the butt joint unit.
2. The pile foundation detection device for engineering detection according to claim 1, wherein: the metering assembly (12) comprises a vertical rotary support with a vertical rotary shaft (21), and the vertical rotary support comprises a vertical fixed seat (22) and a vertical movable seat (23); the vertical rotating shaft (21) is connected with the vertical fixing seat (22) and the vertical movable seat (23), and the vertical movable seat (23) and the vertical fixing seat (22) can rotate relatively in the vertical direction;
The metering assembly (12) further comprises a vertical angle sensor (24) which is arranged on the vertical fixing seat (22) and connected with the vertical rotating shaft (21), the vertical movable seat (23) is connected with the docking unit, and the vertical angle sensor (24) is used for detecting the rotating angle of the docking unit in the vertical direction.
3. The pile foundation detection device for engineering detection according to claim 2, wherein: the pile foundation detection device for engineering detection comprises a plurality of measuring point assemblies (11) and metering assemblies (12) the number of which is consistent with that of the measuring point assemblies (11);
The measuring point assemblies (11) are respectively arranged on the surfaces with different positions on the same pile foundation, and the measuring point assemblies (12) are respectively connected with the corresponding measuring point assemblies (11) through the butt joint units;
the operation unit obtains the rotation angles of the plurality of butt joint units and the relative distance between the measuring point assembly (11) and the metering assembly (12), and calculates the linear size of pile foundation settlement.
4. A pile foundation detection device for engineering detection according to claim 3, wherein: the metering assembly (12) further comprises a horizontal rotating bracket with a horizontal rotating shaft (31), and the horizontal rotating bracket comprises a horizontal fixed seat (32) and a horizontal movable seat (33); the horizontal rotating shaft (31) is connected with the horizontal fixed seat (32) and the horizontal movable seat (33), and the horizontal movable seat (33) and the horizontal fixed seat (32) can rotate relatively in the horizontal direction;
The metering assembly (12) further comprises a horizontal angle sensor (34) which is arranged on the horizontal fixing seat (32) and connected with the horizontal rotating shaft (31), the horizontal movable seat (33) is connected with the docking unit, and the horizontal angle sensor (34) is used for detecting the rotating angle of the docking unit in the horizontal direction.
5. The pile foundation detection device for engineering detection according to claim 4, wherein: the proximal end of the docking unit is connected with the metering assembly (12), and the distal end of the docking unit is connected with the measuring point assembly (11);
The proximal end of the docking unit is provided with a distance sensor (41) and a sleeve (42) arranged on the side edge of the distance sensor (41), the docking unit comprises a docking rod (43), one end of the docking rod (43) is arranged in the sleeve (42), and the docking rod (43) can move along the axial direction of the sleeve (42); the other end of the butt joint rod (43) is provided with a ball head for connecting the measuring point assembly (11);
The distance sensor (41) is connected with the horizontal movable seat (33) and the vertical movable seat (23), and the distance sensor (41) is used for measuring the distance between the metering assembly (12) and the measuring point assembly (11).
6. A pile foundation detection device for engineering detection according to claim 3, wherein: the measuring point assembly (11) comprises a hemispherical shell (51) with a hollow inside and an inner shell (52) arranged inside the hemispherical shell (51), and an arc-shaped groove (56) is arranged between the hemispherical shell (51) and the inner shell (52);
One end of the docking unit penetrates through the hemispherical shell (51), the end portion of the docking unit is arranged in the arc-shaped groove (56), and the docking unit can rotate around the spherical center of the hemispherical shell (51) in the hemispherical shell (51).
7. The pile foundation detection device for engineering detection according to claim 6, wherein: the measuring point assembly (11) further comprises a supporting plate (53) arranged on the outer side of the hemispherical shell (51), a supporting sliding groove (54) and a supporting sliding block (55) arranged in the supporting sliding groove (54) are arranged on the supporting plate (53), and the supporting sliding block (55) can translate in the supporting sliding groove (54);
The supporting plates (53) are arranged on two sides of the hemispherical shell (51), supporting sliding grooves (54) and supporting sliding blocks (55) are arranged on two sides of the hemispherical shell (51), and the supporting sliding blocks (55) are used for being in contact with the circumferential surface of the pile foundation, so that the spherical center of the hemispherical shell (51) is kept on the outer surface of the circumferential surface of the pile foundation;
The pile foundation detection device for engineering detection is characterized in that a plurality of measurement point assemblies (11) are connected through a binding belt (61), and two ends of the binding belt (61) are connected with support plates (53) of two adjacent measurement point assemblies (11); the binding band (61) is provided with a tightening device (62) for tightening the binding band (61).
8. The pile foundation detection device for engineering detection according to claim 1, wherein: the pile foundation detection device for engineering detection further comprises a bracket body for installing a sensor suite; the support body includes support horizontal pole (14) and sets up supporting leg (15) at support horizontal pole (14) both ends, and the sensor external member sets up on support horizontal pole (14).
9. A pile foundation settlement linear dimension detection method for a pile foundation detection device for engineering detection according to any one of claims 1 to 8, characterized by comprising:
Establishing a measuring point SA arranged on the outer surface of the pile foundation, and enabling a metering assembly QA to be aligned with the measuring point SA;
acquiring an angle variation QA N of a metering assembly QA;
And calculating the linear size of pile foundation settlement according to the angle variation QA N.
10. The pile foundation settlement linear dimension detection method as set forth in claim 9, wherein the pile foundation settlement linear dimension detection method comprises:
establishing a coordinate system O, wherein the Z axis of the coordinate system O is parallel to the axis of the pile foundation;
a measuring point SA, a measuring point SB and a measuring point SC are established on the outer surface of the pile foundation;
aligning the measuring assembly QA, the measuring assembly QB and the measuring assembly QC with the measuring point SA, the measuring point SB and the measuring point SC respectively, and acquiring measuring parameters of the measuring assembly QA, the measuring assembly QB and the measuring assembly QC;
the metering parameters comprise the relative angles of the metering component (12) and the corresponding measuring points in the X direction and the Y direction in the coordinate system O and the distance between the metering component (12) and the corresponding measuring points;
Calculating coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O according to the metering parameters to obtain initial coordinates SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
Establishing a zero point plane according to an initial coordinate SA 0, an initial coordinate SB 0 and an initial coordinate SC 0;
in the compression-resistant static load test, measuring parameters of a measuring assembly QA, a measuring assembly QB and a measuring assembly QC are obtained, and coordinates of a measuring point SA, a measuring point SB and a measuring point SC in a coordinate system O are respectively measured point coordinates SA N, measured point coordinates SB N and measured point coordinates SC N;
Establishing a measuring point plane according to the measuring point coordinates;
and calculating the pile foundation settlement linear dimension according to the zero point plane and the measuring point plane.
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