CN111827092B - Prefabricated assembled hollow bridge pier with diaphragm and construction method - Google Patents
Prefabricated assembled hollow bridge pier with diaphragm and construction method Download PDFInfo
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- CN111827092B CN111827092B CN202010606645.5A CN202010606645A CN111827092B CN 111827092 B CN111827092 B CN 111827092B CN 202010606645 A CN202010606645 A CN 202010606645A CN 111827092 B CN111827092 B CN 111827092B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides a prefabricated assembled hollow pier with a diaphragm plate and a construction method, and relates to the technical field of bridge construction. The foundation, the general section and the top cap section are respectively provided with a foundation connecting steel bar and a foundation connecting column, the top and the bottom of the general section are respectively provided with a general section diaphragm, the general section diaphragm at the bottom is provided with a general section reserved groove, the general section diaphragm at the top is provided with a general section connecting steel bar, the bottom of the top cap section is provided with a top cap section diaphragm, the top cap section diaphragm at the bottom is provided with a top cap section reserved groove, the connecting steel bars and the connecting columns at the bottom extend into the corresponding reserved grooves at the upper part during assembly, and high-strength slurry is poured into the reserved grooves, and the foundation, the general section and the top cap section are respectively embedded with a pre-buried prestressed pipeline and are connected by penetrating through a long pre-stressed beam.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a prefabricated assembled hollow pier with a diaphragm and a construction method.
Background
At present, when the bridge pier spans a large river or ocean, the construction conditions are bad, the wind wave is large, the effective operation time on site is short, the concrete pouring maintenance is difficult, the bridge pier is not suitable for cast-in-situ construction, the factory and the spliced construction are adopted, the on-site operation time is greatly shortened, the engineering quality is improved, the water transportation and the hoisting capacity are strong, the bridge pier can be divided into large segments, the large mechanical equipment is adopted for splicing, the bridge pier is suitable for hollow bridge piers with higher heights, and the bridge pier is applied to bridge engineering in some water areas or sea areas at home and abroad.
The hollow pier is usually higher in height and large in section size, common steel bars are arranged on the inner side and the outer side of the pier wall, when the prefabricated assembly construction is adopted, the connection difficulty between dense steel bars is high, so that prestress is often adopted for connection, namely epoxy resin glue is smeared between the sections, and connection between the sections is realized through prestress bundles. The segments of the connecting mode are connected only through the prestress beams, so that the defects of insufficient energy consumption capability, low ductility and the like are overcome, the connecting mode is unsuitable for a high-vibration area, the corrosion resistance is high in the sea, the prestress beams have corrosion risks, if the corrosion is serious, the connection failure is caused, the structural safety is affected, the prestress beams are positioned in the pore channels, the examination, the repair and the replacement are not easy, and meanwhile, the problems of overall stability of pier columns, local stability of pier walls and the like are solved when the height of the hollow pier is high and the length of the segment is long.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a prefabricated assembled hollow pier with a diaphragm plate and a construction method, which are suitable for solving the problems of insufficient energy consumption capacity, low ductility and the like in the prior art by connecting only prestress bundles.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The prefabricated assembled hollow pier suitable for the diaphragm comprises a foundation, general sections and top cap sections sequentially from bottom to top, wherein the top of the foundation is provided with a foundation connecting reinforcement and a foundation connecting column, the top and the bottom of the general sections are provided with general section diaphragms, the general section diaphragms at the bottom are provided with general section reserving grooves, the general section diaphragms at the top are provided with general section connecting reinforcement, the bottom of the top cap section is provided with a top cap section diaphragm, the top cap section diaphragms at the bottom are provided with top cap section reserving grooves, during assembling, the connecting reinforcement and the connecting column at the bottom extend into the corresponding reserving grooves at the top, high-strength slurry is poured into the reserving grooves, the foundation, the general sections and the top cap sections are all embedded with prestress pipelines, the prestress pipelines are connected through penetrating through long prestress bundles, the connecting performance among the sections is guaranteed, the prestress bundles are arranged in the foundation, the anchor, the prestress bundles are connected through fixed anchor, the top end penetrates through the long prestress bundles, the foundation is locked, the prestress bundles from the top end of the anchor bundles, the tension steel bars at the top end stretches into the corresponding reserving grooves, the corresponding prestress bundles at the top end of the top end extends into the corresponding reserving grooves, the corresponding prestress bundles are filled with the prestress bundles at the top end of the foundation, and the prestress bundles at the periphery of the foundation is arranged, and the periphery of the foundation is sealed, and the self-locking protection joint is durable.
In any technical scheme, further, each diaphragm is positioned in the hollow pier, the circumference of the inner side of the pier wall is arranged continuously or discontinuously, the outer side of each diaphragm is connected with the inner side of the pier wall, and the joint is provided with a chamfer transition, so that stress concentration is reduced, the diaphragm and the corresponding section are prefabricated together, the stress area below the section is enlarged, and the stability in storage and assembly is enhanced.
In any of the above technical solutions, further the foundation connection bars and the general section connection bars are pre-buried on the diaphragm plate and extend out of the surfaces of the corresponding sections, foundation stirrups and general section stirrups are respectively arranged at the extending parts, the integrity between the connection bars is enhanced, the length of the connection bars is shortened, a plurality of reinforcement cages are respectively formed between the foundation connection bars and the foundation stirrups and between the general section connection bars and the general section stirrups, and the reinforcement cages are distributed in a scattered manner and are round or rectangular.
In any of the above technical solutions, further, gaps are reserved between the outer contours of the reserved grooves and the corresponding connecting steel bars, so that the reserved grooves can be conveniently penetrated into the gaps, roughening treatment or pre-burying corrugated pipes are performed on the peripheries of the reserved grooves, and the cross sections of the reserved grooves are round or rectangular.
In any technical scheme, further, the foundation connecting columns and the general segment connecting columns are arranged on each diaphragm plate, prefabricated together with the corresponding segments and the diaphragm plates, reinforcing steel bars are arranged in the foundation connecting columns to enhance the shearing resistance, the outer contour diameter of each connecting column is smaller than the size of one side of the corresponding reserved groove, gaps are reserved between the foundation connecting columns and the general segment connecting columns, the foundation connecting columns and the general segment connecting columns are convenient to penetrate through, the surrounding rings of the foundation connecting columns and the general segment connecting columns are subjected to roughening treatment, the sections of the foundation connecting columns and the general segment connecting columns are round or rectangular, the connecting columns serve as shearing resistant structures among the segments and play a role in positioning when the segments are assembled, and the connecting columns are distributed above the diaphragm plates and are staggered with the connecting steel bars.
In any of the above technical solutions, further, the high-strength slurry is ultra-high performance concrete or high-strength grouting material, so that the reserved groove, the connecting steel bars and the connecting columns are integrated, the high-strength slurry can be ultra-high performance concrete or high-strength grouting material, the required length of the connecting steel bars is shortened, and the connection safety is improved.
In any one of the above technical schemes, further, an outer protection is arranged around the joint of the foundation and the general section, corrosion-resistant and wear-resistant UHPC is adopted, a foundation reserved steel bar joint and a general section reserved steel bar joint are respectively arranged, and after the assembly is completed, the facing steel bars are bound, and the UHPC is poured, so that the outer protection is connected with the foundation and the general section into a whole.
The invention provides a construction method suitable for a prefabricated assembled hollow pier with a diaphragm plate, which comprises the following steps:
Step one, constructing a foundation connecting column, binding foundation stirrups of foundation connecting steel bars, and prefabricating general sections and top cap sections to be assembled;
Paving high-strength mortar of a bottom joint on the top surface of a foundation, hoisting a general section for installation by a slurry-sitting method, penetrating foundation connecting steel bars and foundation connecting columns on the foundation into general section reserved grooves on a general section diaphragm plate, and pouring the high-strength mortar;
Paving an intermediate joint epoxy resin adhesive on the top surface of the lower general section, hoisting the upper general section, penetrating the connecting steel bars of the lower general section and the connecting columns of the general section into a reserved groove of the top cap section on the diaphragm plate of the top cap section, and pouring high-strength slurry;
Step four, paving an intermediate joint epoxy resin adhesive on the top surface of a general section, hoisting a top cap section, penetrating general section connecting steel bars and general section connecting columns into a top cap section reserved groove on a top cap section diaphragm plate, and pouring high-strength slurry;
Sequentially penetrating a through-length prestress beam into the top cap section, the general section and the foundation pre-buried prestress pipeline from the top end of the top cap section, tensioning the prestress beam tensioning end at the top end of the top cap section, positioning the prestress beam anchoring end in the foundation, and constructing a prestress beam sealing anchor;
step six, pipeline grouting is carried out on the pipeline with the length of the prestressed bundle;
Binding the facing steel bars with reserved steel bar joints of the foundation and reserved steel bar joints of general sections, and pouring external protection.
The beneficial effects of the invention are as follows:
the prefabricated assembled hollow pier with the diaphragm plate and the construction method provided by the invention have the following effects:
1. The connecting steel bars are arranged, so that the defects of insufficient energy consumption and low ductility of the prestress assembly pier are overcome, the prestress assembly pier is suitable for a high-earthquake area, the connecting steel bars do not occupy the pier wall space, the prestress on the pier wall is flexibly arranged and is easy and convenient to manufacture, the construction of the connecting steel bars is not influenced by the severe condition of the external environment, the construction is facilitated, the appearance of the structure is not influenced, the connecting steel bars are positioned in the structure, and the prestress assembly pier is good in durability and suitable for the erosion environment;
2. The combination of the prestress steel bundles and the connecting steel bars obviously improves the connection performance of joints, compensates the risks of corrosion, failure and the like of the prestress bundles existing in pure prestress connection, reduces the number of the needed prestress, and simplifies the procedures of prestress bundle penetration, tensioning and the like;
3. The stability of the segments is improved by arranging the diaphragm plates, the sectional length of the pier column segments is increased, the number of joints is reduced, the overall stability of the pier and the local stability of the pier wall are improved, the bridge pier is particularly suitable for high piers on water areas or sea areas, and when the bridge pier is cast-in-situ, the construction difficulty is greatly increased by arranging the diaphragm plates under the influence of climbing forms of inner templates and the like.
4. The inter-segment connecting columns are also used as structural shear keys, and the shear keys are not arranged on the pier walls, so that special template arrangement during segment manufacture is simplified, cost is saved, segment manufacture progress is quickened, accurate alignment of the pier wall shear keys is not needed during assembly, and assembly speed is quickened.
5. The connecting steel bar penetrates into the reserved groove, the construction tolerance is large, the reserved groove is used as a high-strength slurry pouring template, and the construction is convenient.
6. The connecting column is used as a positioning key for pier column assembly, so that positioning is facilitated when the sections are assembled, the connecting column is large in size, high in construction quality and strong in shearing resistance.
7. The pier wall diaphragm plate increases the area of the bottom of the section, improves the stability of the storage and assembly processes of the section, and is convenient for temporary locking.
8. The pier bottom joint is often positioned under water and is easily influenced by water level fluctuation, scouring and the like, so that the durability of the joint is influenced, and the durability of the pier bottom joint is enhanced by arranging external protection around the pier bottom joint and adopting corrosion-resistant and wear-resistant UHPC.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram (a) of an elevation structure of a prefabricated assembled hollow pier with a diaphragm plate, which is provided by the embodiment of the invention;
fig. 2 is a schematic diagram of an elevation structure of a prefabricated assembled hollow pier with a diaphragm according to an embodiment of the present invention (ii);
fig. 3 is a schematic view of a prefabricated assembled hollow pier foundation structure with a diaphragm plate, which is provided by the embodiment of the invention;
Fig. 4 is a schematic diagram of a general segment structure of a prefabricated assembled hollow pier with a diaphragm plate, which is provided by the embodiment of the invention;
fig. 5 is a schematic diagram of a prefabricated assembled hollow pier top cap segment suitable for use with a diaphragm plate according to an embodiment of the present invention;
fig. 6 is a schematic diagram (a) of seam assembly of a prefabricated assembled hollow pier suitable for use with a diaphragm plate according to an embodiment of the present invention;
Fig. 7 is a schematic diagram (two) of seam assembly of a prefabricated assembled hollow pier suitable for being provided with a diaphragm plate according to an embodiment of the invention;
fig. 8 is a schematic diagram (iii) of seam assembly of a prefabricated assembled hollow pier suitable for use with a diaphragm plate according to an embodiment of the present invention;
fig. 9 is a schematic view of an external protection structure of a prefabricated assembled hollow pier with a diaphragm plate, which is provided by the embodiment of the invention.
Icon:
1-foundation;
101-foundation connection reinforcing bars;
102-foundation stirrups;
103-a base connection column;
2-general segment;
201-general segment connecting rebars;
202-general segment stirrups;
203-general segment connecting columns;
204-general segment diaphragms;
205-general segment reservation slots;
3-top cap segments;
301-top cap segment diaphragm;
302-top cap segment reservation slots;
4-external protection;
401-reserving a reinforcing steel bar joint on a foundation;
402-general segment reserved rebar junctions;
403-facing rebar;
5-bottom seam;
6-an intermediate seam;
7-pre-stressing the pipe;
8-a full length prestressing beam;
801-a prestress beam anchoring end;
802-stretching ends of the prestress bundles;
803-prestress beam sealing anchors;
9-pipeline grouting;
10-high-strength slurry.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
As shown in fig. 1 to fig. 9, the schematic diagrams of the corresponding structures of the prefabricated assembled hollow pier with the diaphragm provided in this embodiment are provided, and the following description is made with reference to fig. 1 to fig. 9:
the prefabricated assembled hollow pier suitable for the diaphragm comprises a foundation 1, a general section 2 and a top cap section 3 from bottom to top in sequence, wherein a connecting reinforcement 101 and a connecting column 103 are arranged at the top of the foundation 1, a general section diaphragm 204 is arranged at the top and bottom of the general section 2, a general section reserved groove 205 is arranged on the general section diaphragm 204 at the bottom, a connecting reinforcement 201 is arranged on the general section diaphragm 204 at the top, a top cap section diaphragm 301 is arranged at the bottom of the top cap section 3, a top cap section reserved groove 302 is arranged on the top cap section diaphragm 301 at the bottom, the connecting reinforcement and the connecting column at the bottom extend into the corresponding reserved groove at the top when assembling, a high-strength slurry 10 is poured into the reserved groove, the foundation 1, the general section 2 and the top cap section 3 are all embedded with a pre-stressing pipeline 7, connection is performed through penetrating a through-length pre-stressing anchor 8, a pre-stressing anchor end 801 is arranged in the foundation 1, connection is performed through a self-locking anchor, penetrating through the through-length pre-stressing anchor 8 from the top end, locking is performed in the top end of the top section 1, the pre-stressing anchor end 802 is performed at the top end of the foundation 1, and a seam is sealed around the foundation 2 is sealed, and the periphery of the foundation 2 is protected, and the seam is protected.
Furthermore, each diaphragm is positioned in the hollow pier, the circumference of the inner side of the pier wall is arranged continuously or discontinuously, the outer side of each diaphragm is connected with the inner side of the pier wall, and the joint is provided with chamfer transition, so that stress concentration is reduced, the diaphragm and the corresponding section are prefabricated together, the stress area below the section is enlarged, and the stability in storage and assembly is enhanced.
Specifically, the general section diaphragm 204 and the top cap section diaphragm 301 are positioned in the hollow pier, the circumference of the inner side of the pier wall is arranged continuously or discontinuously, the outer side of each diaphragm is connected with the inner side of the pier wall, and the joint is provided with a chamfer transition and prefabricated with the corresponding section.
Further, the foundation connecting steel bars 101 and the general section connecting steel bars 201 are all pre-buried on each diaphragm plate and extend out for a certain length, the foundation connecting steel bars 101 are provided with the foundation stirrups 102, the general section connecting steel bars 201 are provided with the general section stirrups 202, the integrity between the connecting steel bars is enhanced, the length of the connecting steel bars is shortened, the foundation connecting steel bars 101, the foundation stirrups 102, the general section connecting steel bars 201 and the general section stirrups 202 respectively form a plurality of steel bar cages which are distributed and arranged in a round or rectangular mode.
Further, the general segment reservation grooves 205 and the top cap segment reservation grooves 302 are respectively arranged on each diaphragm plate, the diameter size of each reservation groove is 5cm larger than one side of the outer contour of the corresponding connecting steel bar, a gap is formed, the reserved grooves can conveniently penetrate into the connecting steel bar, roughening treatment or pre-burying corrugated pipes are carried out on the periphery of each reservation groove, and the cross section of each reservation groove is round or rectangular.
Further, the foundation connecting columns 103 and the general segment connecting columns 203 are arranged on each diaphragm plate, prefabricated together with the corresponding segments and the diaphragm plates, reinforcing steel bars are arranged in the foundation connecting columns to enhance the shearing resistance, the outer contour diameter of each connecting column is smaller than that of one side of the corresponding reserved groove by 5cm, gaps are formed, penetration is facilitated, the circumferential rings of each connecting column are subjected to roughening treatment, the cross section of each connecting column is round or rectangular, each connecting column serves as a shearing resistant structure between the segments and plays a role in positioning during segment assembly, and each connecting column is arranged above each diaphragm plate in a scattered mode and is staggered with the connecting steel bars.
Further, the high-strength slurry 10 adopts ultra-high performance concrete or high-strength grouting material, so that all the reserved grooves, all the connecting steel bars and all the connecting columns are integrated, the high-strength slurry 10 can adopt ultra-high performance concrete or high-strength grouting material, the required length of the connecting steel bars is shortened, and the connecting safety is improved.
Further, the outer protection 4 is located at the periphery of the bottom joint 5, corrosion-resistant and wear-resistant UHPC is adopted, a foundation reserved steel bar joint 401 and a general section reserved steel bar joint 402 are respectively arranged, after assembling is completed, the face guard steel bar 403 is bound, and UHPC is poured, so that the outer protection 4 is connected with the foundation 1 and the general section 2 into a whole.
The invention provides a construction method suitable for a prefabricated assembled hollow pier with a diaphragm plate, which comprises the following steps:
firstly, constructing a foundation 1, constructing a foundation connecting column 103, binding foundation stirrups 102 of foundation connecting steel bars 101, and prefabricating a general section 2 and a top cap section 3 to be assembled;
Step two, as shown in fig. 6-8, paving high-strength slurry 10 of a bottom joint 5 on the top surface of a foundation 1, hoisting a general section 2 for slurry-sitting installation, penetrating a foundation connecting steel bar 101 and a foundation connecting column 103 on the foundation 1 into a general section reserved groove 205 on a general section diaphragm plate 204, and pouring the high-strength slurry 10;
Step three, paving an intermediate joint 6 epoxy resin adhesive on the top surface of the lower general section 2, hoisting the upper general section 2, penetrating the lower general section connecting steel bars 201 and the general section connecting columns 203 into a top cap section reserved groove 302 on a top cap section diaphragm 301, and pouring high-strength slurry 10;
step four, paving an intermediate joint 6 epoxy resin adhesive on the top surface of a general section 2, hoisting a top cap section 3, penetrating general section connecting steel bars 201 and general section connecting columns 203 into a top cap section reserved groove 302 on a top cap section diaphragm 301, and pouring high-strength slurry 10;
step five, penetrating a through-length prestress beam 8 into the pre-embedded prestress pipeline 7 of the top cap section 3, the general section 2 and the foundation 1 from the top end of the top cap section 3 in sequence, tensioning the prestress beam tensioning end 802 from the top end of the top cap section 3, positioning the prestress beam anchoring 801 end in the foundation 1, and constructing a prestress beam sealing anchor 803;
Step six, pipeline grouting 9 is carried out on the pipeline with the length of the prestressed bundle 8;
Step seven, as shown in fig. 9, binding the facing steel bar 403 with the reserved steel bar joints 401 and the reserved steel bar joints 402 of the general sections, and pouring the outer protection 4.
The prefabricated assembled hollow pier with the diaphragm plate and the construction method provided by the embodiment of the invention have the following effects:
1. The connecting steel bars are arranged, so that the defects of insufficient energy consumption and low ductility of the prestress assembly pier are overcome, the prestress assembly pier is suitable for a high-earthquake area, the connecting steel bars do not occupy the pier wall space, the prestress on the pier wall is flexibly arranged and is easy and convenient to manufacture, the construction of the connecting steel bars is not influenced by the severe condition of the external environment, the construction is facilitated, the appearance of the structure is not influenced, the connecting steel bars are positioned in the structure, and the prestress assembly pier is good in durability and suitable for the erosion environment;
2. The combination of the prestress steel bundles and the connecting steel bars obviously improves the connection performance of joints, compensates the risks of corrosion, failure and the like of the prestress bundles existing in pure prestress connection, reduces the number of the needed prestress, and simplifies the procedures of prestress bundle penetration, tensioning and the like;
3. The stability of the segments is improved by arranging the diaphragm plates, the sectional length of the pier column segments is increased, the number of joints is reduced, the overall stability of the pier and the local stability of the pier wall are improved, the bridge pier is particularly suitable for high piers on water areas or sea areas, and when the bridge pier is cast-in-situ, the construction difficulty is greatly increased by arranging the diaphragm plates under the influence of climbing forms of inner templates and the like.
4. The inter-segment connecting columns are also used as structural shear keys, and the shear keys are not arranged on the pier walls, so that special template arrangement during segment manufacture is simplified, cost is saved, segment manufacture progress is quickened, accurate alignment of the pier wall shear keys is not needed during assembly, and assembly speed is quickened.
5. The connecting steel bar penetrates into the reserved groove, the construction tolerance is large, the reserved groove is used as a high-strength slurry pouring template, and the construction is convenient.
6. The connecting column is used as a positioning key for pier column assembly, so that positioning is facilitated when the sections are assembled, the connecting column is large in size, high in construction quality and strong in shearing resistance.
7. The pier wall diaphragm plate increases the area of the bottom of the section, improves the stability of the storage and assembly processes of the section, and is convenient for temporary locking.
8. The pier bottom joint is often positioned under water and is easily influenced by water level fluctuation, scouring and the like, so that the durability of the joint is influenced, and the durability of the pier bottom joint is enhanced by arranging external protection around the pier bottom joint and adopting corrosion-resistant and wear-resistant UHPC.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate from the essence of the corresponding technical solution from the scope of the technical solution of the embodiment of the present invention.
Claims (6)
1. The utility model provides a hollow pier is assembled in prefabrication suitable for take diaphragm, by down and last basic (1), general festival section (2) and top cap section (3) of including in proper order, its characterized in that:
a foundation connecting steel bar (101) and a foundation connecting column (103) are arranged at the top of the foundation (1);
The top and the bottom of the general section (2) are provided with general section diaphragms (204), the general section diaphragms (204) at the bottom are provided with general section reserved grooves (205), and the general section diaphragms (204) at the top are provided with general section connecting steel bars (201);
A top cap section diaphragm plate (301) is arranged at the bottom of the top cap section (3), and a top cap section reserved groove (302) is arranged on the top cap section diaphragm plate (301) positioned at the bottom;
During assembly, connecting steel bars and connecting columns which are positioned below are stretched into corresponding reserved grooves which are positioned above, and high-strength slurry (10) is poured into each reserved groove;
The foundation (1), the general section (2) and the top cap section (3) are all embedded with pre-stressed pipelines (7) and are connected by penetrating through a long pre-stressed bundle (8);
An outer protection (4) is arranged around the joint of the foundation (1) and the general section (2);
Each diaphragm plate is positioned in the hollow pier, the circumference of the inner side of the pier wall is arranged continuously or discontinuously, the outer side of each diaphragm plate is connected with the inner side of the pier wall, and the joint is provided with a chamfer transition and prefabricated together with the corresponding section;
The foundation connecting columns (103) and the general segment connecting columns (203) are all arranged on each diaphragm plate, prefabricated together with the corresponding segments and the diaphragm plates, reinforcing steel bars are arranged inside the foundation connecting columns, the outer contour diameter size of each connecting column is smaller than the corresponding size of one side of each reserved groove, gaps are reserved between the foundation connecting columns and the corresponding side of each reserved groove, the foundation connecting columns (103) and the circumference of the general segment connecting columns (203) are subjected to roughening treatment, the sections of the foundation connecting columns (103) and the general segment connecting columns (203) are round or rectangular, and the connecting columns are distributed above the diaphragm plates and are staggered with the connecting steel bars.
2. The prefabricated assembled hollow pier suitable for the diaphragm plates, according to claim 1, is characterized in that the foundation connecting steel bars (101) and the general section connecting steel bars (201) are embedded in the diaphragm plates and extend out of the surfaces of the corresponding sections, foundation stirrups (102) and general section stirrups (202) are respectively arranged at the extending parts, a plurality of steel reinforcement cages are respectively formed between the foundation connecting steel bars (101) and the foundation stirrups (102) and between the general section connecting steel bars (201) and the general section stirrups (202), and are distributed and arranged in a round or rectangular mode.
3. The prefabricated assembled hollow pier with diaphragm plates according to claim 1, wherein gaps are reserved between the outer contours of the reserved grooves and the corresponding connecting steel bars, roughening treatment or pre-embedding corrugated pipes are carried out on the periphery of each reserved groove, and the cross section of each reserved groove is round or rectangular.
4. The prefabricated assembled hollow pier suitable for the transverse partition plates according to claim 1, wherein the high-strength slurry (10) is ultra-high-performance concrete or high-strength grouting material.
5. The prefabricated assembled hollow pier with the diaphragm plate, according to claim 1, is characterized in that an outer protection (4) is arranged around the joint of the foundation (1) and the general section (2), corrosion-resistant and wear-resistant UHPC is adopted, a foundation reserved steel bar joint (401) and a general section reserved steel bar joint (402) are respectively arranged, and binding of the facing steel bars is completed.
6. The construction method of the prefabricated assembled hollow pier suitable for the diaphragm plates is characterized by comprising the following steps of:
Constructing a foundation (1), constructing a foundation connecting column (103), binding foundation stirrups (102) of foundation connecting steel bars (101), and prefabricating a general section (2) and a top cap section (3) to be assembled;
step two, paving high-strength mortar of a bottom joint (5) on the top surface of a foundation (1), hoisting a general section (2) for installation by a slurry sitting method, penetrating a foundation connecting steel bar (101) and a foundation connecting column (103) on the foundation (1) into a general section reserved groove (205) on a general section diaphragm plate (204), and pouring high-strength mortar (10);
Paving an intermediate joint (6) epoxy resin adhesive on the top surface of a lower general section, hoisting an upper general section, penetrating a lower general section connecting steel bar and a general section connecting column (203) into a top cap section reserved groove (302) on a top cap section diaphragm plate (301), and pouring high-strength slurry (10);
Paving an intermediate joint (6) epoxy resin adhesive on the top surface of a general section (2), hoisting a top cap section (3), penetrating general section connecting steel bars (201) and general section connecting columns (203) into a top cap section reserved groove (302) on a top cap section diaphragm plate (301), and pouring high-strength slurry (10);
Step five, penetrating a through-length prestress beam (8) into a pre-buried prestress pipeline (7) of the top cap section (3), the general section (2) and the foundation (1) from the top end of the top cap section (3), tensioning a prestress beam tensioning end (802) at the top end of the top cap section (3), positioning a prestress beam anchoring end (801) in the foundation (1), and constructing a prestress beam sealing anchor (803);
step six, pipeline grouting (9) is carried out on the pipeline with the through length prestressed beam (8);
binding the facing steel bars (403), the reserved foundation steel bar joints (401) and the reserved common section steel bar joints (402), and pouring the outer protection (4).
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| CN112853983B (en) * | 2021-01-11 | 2023-03-21 | 山东高速建设管理集团有限公司 | Manufacturing and on-site assembling process of light segment prefabricated bridge pier |
| CN113123243B (en) * | 2021-04-16 | 2022-05-31 | 长江勘测规划设计研究有限责任公司 | Construction method for conveniently installing hollow pier diaphragm plate device |
| CN113481870A (en) * | 2021-08-11 | 2021-10-08 | 柳州欧维姆机械股份有限公司 | Prestressed anchoring structure system for assembling multi-segment bridge pier and assembling construction method of multi-segment bridge pier |
| CN113756193B (en) * | 2021-08-27 | 2022-12-23 | 中铁七局集团有限公司 | Hollow pier construction method |
| CN113585092A (en) * | 2021-09-02 | 2021-11-02 | 中铁十一局集团第五工程有限公司 | Pier shaft baffle integral structure |
| CN113668367A (en) * | 2021-09-02 | 2021-11-19 | 中铁十一局集团第五工程有限公司 | Hollow pier diaphragm plate pouring construction method |
| CN117005305B (en) * | 2023-07-05 | 2024-06-18 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
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| CN212561129U (en) * | 2020-06-29 | 2021-02-19 | 中国国家铁路集团有限公司 | Suitable for prefabricated hollow piers with diaphragms |
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| JP4651509B2 (en) * | 2005-11-09 | 2011-03-16 | 三井住友建設株式会社 | Columnar structure |
| KR101143310B1 (en) * | 2009-07-21 | 2012-05-09 | 한국건설기술연구원 | Precast concrete segments for constructing bridge piers with elongated round holes surrounding reinforcing bars and the method using the same |
| BR112012019203A2 (en) * | 2010-02-01 | 2018-03-27 | Conelto Aps | concrete tower construction, method for erecting a tower construction, concrete tower element, and interconnecting element. |
| CN108179696A (en) * | 2018-01-31 | 2018-06-19 | 中交第二航务工程勘察设计院有限公司 | A kind of post-tensioned prestressing precast hollow formula bridge pier rod structure and construction method |
| CN109183607B (en) * | 2018-10-23 | 2020-12-29 | 湖南大学 | Prefabricated spliced UHPC pipe-concrete ultra-high bridge pier and construction method |
| CN110820545B (en) * | 2019-11-08 | 2021-06-08 | 济南金诺公路工程监理有限公司 | Assembled concrete pier |
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