CN1033694A - Automatic check and analysis method of static pile press and device - Google Patents

Abstract

The invention discloses automatic check and analysis method of a kind of static press piling and device, be applicable to that the static pile press pressing pile construction detects piling parameter and analysis-by-synthesis automatically.Its adopts sensor to detect automatically, realizes objective, accurate, the synchro measure of piling parameter, the computer system image data, is processed into the actual measurement parameter, and print result plots curve, and analysis-by-synthesis draws the actual bearer ability of stake.It cooperates the automatic control system of controlling working sensor by load cell, depth sensor with the hydraulic system of solenoid control, and device is sent in the change that detection signal is converted to certain standard electric signal, and formations such as computer system are simple.

Description

Automatic check and analysis method of static pile press and device

The present invention relates to automatic check and analysis method of a kind of soil mechanics ground foundation parameter and device thereof, automatic check and analysis method of particularly a kind of static pile press and device.Be applicable to that static pile press carries out pressing pile construction and detects piling parameter and analysis-by-synthesis automatically.

Now,, can pass through the test pile static test, obtain the P-S curve, L for the load-bearing capacity of piling _gS-t curve, and determine the static test ultimate load with second flex point of P-S curve, after as calculated, try to achieve actual carrying capacity, judge with rebound curve whether a stake point enters again and hold soil layer.This test will expend plenty of time and expense, and on behalf of test pile itself, this test only be subjected to the situation of load action individually, some test piles in same pile foundation engineering in fact, and its test findings, settling amount, actual carrying capacity are all inequality.The bearing capacity of single pile that the general Pile Foundations Design of designing unit is determined is drawn log sheet according to the static sounding that geology department provides than penetrating power and drilling data, and it is according to also being select several as static sounding and probing point.And for the location point of engineering piles itself, very important basis is exactly that engineering is in work progress, the engineering piles resistance of pressing in curve of people's work and test pile are in work progress, and the pressure drag curve of people's work is compared, and compares the actual carrying capacity of ground evaluation engineering stake.The resistance of pressing in curve of people's work is to estimate the stake compression distance according to the workmen with observing to look into, the indicated value of oil pressure gauge is looked in sight, because in the practice of construction, not only compression distance does not have standard, be difficult to estimate accurately, and the moment swing of oil pressure gauge pointer is big, also be difficult to read standard, in addition, the sight of above-mentioned two parameters is looked into and is write down and is difficult to synchronously, also have some human factors to be difficult to overcome in addition, so the resistance of pressing in curve of drawing out, the analysis result that obtains are difficult to make us putting letter, for this reason, usually cause the dispute of construction department and design department.Above-mentioned current methods is difficult at the construction field (site) accurately acquisition parameter, thereby draw resistance of pressing in curve accurately, can not be engaged in static press piling by static pile press and reflect engineering geological condition, analysis-by-synthesis and then definite single pile bearing capacity soon, also have no way of distinguishing the positive stroke of static pile press construction, return stroke, off time etc., cause same pile driving pressure to produce single pile and allow the concrete analysis of the discreteness of bearing capacity to lack foundation.

Task of the present invention is that automatic check and analysis method of a kind of static pile press and device thereof will be provided.It can be taked parameter automatically and accurately, draw the resistance of pressing in curve when static pile press is engaged in static press piling, analysis-by-synthesis reflects engineering geological condition, determine single pile bearing capacity, can distinguish static press piling positive stroke, return stroke and off time, can very fast demonstration, record result and drawing.

Task of the present invention is finished as follows: use pressure measurement, depth sensor to detect the pile top load of static pile press static press piling, compression distance, detection signal is transformed into the electric signal of certain standard and takes system to send into computer system through data, the computer system processor parameter, by the time actual measured results, storage, print data, draw the resistance of pressing in curve, carry out the load-bearing capacity that analysis-by-synthesis is determined single pile.The work of sensor is subjected to the control of Hydraulic System of Hydrostatic Pressure Pile Driver and robot control system(RCS), and to distinguish the positive stroke of static pile press static press piling, to return stroke and off time, realization piling parameter synchronization is accurately measured.

For realizing said method, the automatic check and analysis device of static pile press of the present invention is by static pile press liquid level control system, automatic control system, and the static press piling parameter sensors becomes the change of certain standard electric signal to send device conversion of signals, data collector, compositions such as computer system.

Computer system can only be on-the-spot microcomputer system, also can increase the summary computer software that is connect by interface with it.

Computer system comprises computing machine and printer, external units such as plotting apparatus magnetic tape station.

The electric signal of the certain standard that is transformed into after load cell detects is through middle monitor display, the computer data acquiring device, and data selection, decoding and three-state output gate circuit are sent into computer system.

The electric signal of the certain standard that is transformed into after depth sensor detects, machine data sampling device as calculated, data selection, decoding and three-state output gate circuit are sent into computer system.

When using method and apparatus of the present invention, can on the hydraulic system of static pile press solenoid control, load cell be installed, also can be in stake the setting pressure sensor, on the piling device, depth sensor is installed.These two sensors are subjected to the control of the hydraulic system of A.C. contactor, relay dispatch control system and solenoid control.The signal transformation that load cell detects becomes the electric signal of certain standard through data acquisition, middle monitoring shows sends into the microcomputer system that data selection, decoding and three-state output gate circuit are delivered to the static pile press scene, the signal transformation that depth sensor detects becomes the electric signal of certain standard, also take through data, data selection, decoding and three-state output gate circuit are sent into on-the-spot microcomputer system.On-the-spot microcomputer system collection, process information draw the actual measurement parameter, and storage, print parameters are drawn the resistance of pressing in curve of piling, calculate the actual bearer ability of stake.On-the-spot microcomputer system and another summary computer software adopt communication interface to connect.Summary computer software gathers the parameter that is pressed into of whole pile foundation engineering, carries out analysis-by-synthesis, draws the analysis conclusion, and draws.Thereby realized that static pile press is engaged in that static press piling is objective, accurate, the synchronous detection parameter, and can calculate rapidly, draw, print result and analysis-by-synthesis draw the actual bearer ability of stake and analyze conclusion, judge the quality situation of every pile and whole pile foundation engineering, guarantee construction quality.

Below with reference to accompanying drawing the present invention is described in further detail.

Fig. 1 is the block diagram of a kind of concrete grammar of the present invention and device.

With reference to Fig. 1, depth sensor (5) is contactless Clairvoyant type pick-up unit, the infrared tube little by power consumption, that the life-span is long, efficient is high is made light source, and with the infrared light High Speed Modulation, adopt highly sensitive silicon phototriode to make light-receiving device, carry out opto-electronic conversion,, every 0.1 meter the printing opacity aperture is arranged on the scale at static pile press static press piling device (3) fitting depth scale.Depth sensor can be the compression distance that unit detects stake automatically with 0.1 meter automatically like this.Dark pressure sensor (6) is that a pressure unit is installed in the direct current signal that static pile press solenoid control oil piping system (2) is gone up the detection pile top load and is transformed into 0～10MA, send device (7) to convert voltage signal to through change again, monitor display (8) in the middle of sending into, middle monitor display (8) is selected the circuit and the device of digital display function for use, the digital display pressure signal, the surveillance duty is sent into on-the-spot microcomputer system (11) through data selection, decoding and three-state output gate circuit (9) again.The detected light pulse of depth sensor (5) is through amplifying, and the rear drive executive component is handled in synchronous selection pass, conciliation, action delay etc., sends the level output of light pulse CP output and actuation counter, in order to counting.In other embodiments, use Hall element, magnetic induction part or other sensor as depth sensor (5), bonding or erection stress sheet in static pile press or stake, other sensor of strainmeter or the like is as load cell (6).(4) be Electric Traction and oil pump hydraulic means.

The signal that depth sensor (5), load cell (6) detect is sent into data selection, decoding and tri-state gate circuit (9) and is inserted on-the-spot microcomputer system (11) through converting certain standard electric signal and data sampling device to.

On-the-spot microcomputer system (11) connects with summary computer software (13) mutually by the communication interface (12) of asynchronous communication mode, constitutes computer system (10).

Two sensors of oil piping system (2) control and data selection, decoding and the three-state output gate circuit (9) of control system (1) and solenoid control, make it automatic detection, and the positive stroke of the piling that can distinguish static pile press, return stroke and off time, realize measuring accurately.

In an embodiment, eight pocket computer PC-1500 that ports having has been expanded in the on-the-spot microcomputer system (11), magnetic tape station and small-sized plotting apparatus, deal with data draws record actual measurement parameter print result, draw the resistance of pressing in curve of every pile.Summary computer software has 16-bit microcomputer in (13), and printer and plotting apparatus are according to the program of input, the parameter that is pressed into of every pile is gathered, and carry out analysis-by-synthesis, draw the actual bearer ability of every pile, the pile foundation engineering quality condition, print result, graphing.

Said method, simple, the easy row of device. Realized objective, accurate, synchro measure, energy express analysis result draws the actual bearer ability of stake, and in time print result is drawn pattern.

Claims (5)

1, the automatic check and analysis method of a kind of static pile press, it is characterized in that: detect the static press piling parameter automatically by depth sensor, load cell, depth sensor, load cell are subjected to the control of robot control system(RCS), by computer system acquisition testing data, be processed into the actual measurement parameter, draw the resistance of pressing in curve of piling, print data, analysis-by-synthesis draws an actual bearer ability.

2, a kind of automatic check and analysis device of static pile press that is applicable to claim 1, it is characterized in that: have with the hydraulic system (2) of solenoid control to cooperate the automatic control system (1) of controlling sensor, depth sensor (5), load cell (6), computer system compositions such as (10).

3, according to claim 1, the automatic check and analysis device of 2 described static pile press, it is characterized in that: have to become the change of certain standard electric signal to send device (7) the sensor signal transmitting.

4, according to claim 1, the automatic check and analysis device of 2 described static pile press, it is characterized in that: in pressure transducer (6) detection signal transmission approach, middle monitor display (8) is arranged.

5, according to claim 1, the automatic check and analysis device of 2 described static pile press, it is characterized in that: computer system (10) is formed for on-the-spot miniature computing system (11) or by on-the-spot microcomputer system (11), communication interface (12) and summary computer software (13).

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