CN216193973U - Pier shaft structure is assembled to prefabricated segment - Google Patents
Pier shaft structure is assembled to prefabricated segment Download PDFInfo
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- CN216193973U CN216193973U CN202122200917.4U CN202122200917U CN216193973U CN 216193973 U CN216193973 U CN 216193973U CN 202122200917 U CN202122200917 U CN 202122200917U CN 216193973 U CN216193973 U CN 216193973U
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Abstract
The utility model provides a prefabricated section assembled pier body structure, which comprises a bearing platform (1) and a bent cap (3), and is characterized in that: the concrete-filled hollow pier column is characterized in that the hollow pier column (2) with the prefabricated sections of the multiple sections are sequentially connected above the bearing platform (1), the top of the hollow pier column (15) with the prefabricated sections at the top is connected with the cover beam (3), the inside of the bearing platform (1), the hollow pier column (2) with the prefabricated sections of the multiple sections and the cover beam (3) is connected with a prestressed steel strand (4) in the vertical direction, a wire body of the prestressed steel strand (4) is in a U-shaped arrangement, two ends of the prestressed steel strand are fixedly connected with the cover beam (3), and concrete is poured between the hollow pier column (13) with the prefabricated sections of the first section at the bottom and the bearing platform (1). Concrete is poured into the first prefabricated section hollow pier column (13) at the bottom. The utility model ensures the integrity of the pier column, improves the strength of the pier column and improves the working efficiency.
Description
Technical Field
The utility model relates to the field of viaduct pier body construction, in particular to a prefabricated segment assembled pier body structure.
Background
The existing construction of the viaduct beam pier column generally directly carries out measurement lofting, vertical mold assembly and concrete cast-in-place maintenance work on the viaduct pier body construction site; or the prefabricated segment assembling construction technology which is prefabricated in a factory and installed on site is adopted, and the prefabricated segment assembling construction technology has the advantage of high construction efficiency compared with the cast-in-place pier body technology. Because the shearing deformation of the pier assembled by the elevated bridge segments is mainly concentrated at the bottom of the pier, particularly at the joint of the bearing platform, and when the pier assembled by the elevated bridge segments is installed, the pier segments are assembled by the splicing steel plates and the bolts in a section by section, so that the integrity and the strength of the pier are not enough after the engineering is finished.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a prefabricated segment assembled pier body structure. The utility model ensures the integrity of the pier column, improves the strength of the pier column and improves the working efficiency.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
the utility model provides a pier shaft structure is assembled to prefabricated segment, includes cushion cap and bent cap, its characterized in that: the hollow pier stud of prefabricated segment of multisection is connected gradually to the cushion cap top, and the top of the hollow pier stud of prefabricated segment at top is connected the bent cap, the inside of cushion cap, the hollow pier stud of prefabricated segment of multisection and bent cap is connected with prestressing steel strand wires in vertical direction, and prestressing steel strand wires's line body is the U type setting, both ends and bent cap fixed connection, has pour the concrete between the hollow pier stud of first section prefabricated segment in bottom and the cushion cap, has poured the concrete in the hollow pier stud of first section prefabricated segment in bottom.
Further: u-shaped corrugated pipes are pre-buried in the bearing platform, first preformed holes are formed in the cover beam and the multi-section prefabricated section hollow pier stud, and U-shaped corrugated pipes and the first preformed holes form U-shaped channels for the prestressed steel strands to penetrate through.
Further: the bearing platform, the multi-section prefabricated section hollow pier stud and the cover beam form a hollow pier stud overall structure, and prestressed steel strands are arranged inside the side wall of each side of the hollow pier stud overall structure.
Further: the connecting surfaces of two adjacent sections of prefabricated section hollow pier columns are connected by adopting a binder, the sections of prefabricated section hollow pier columns are connected by adopting finish rolling deformed steel bars, the end parts of the finish rolling deformed steel bars are respectively connected with the bearing platform and the cover beam, and second preformed holes for the finish rolling deformed steel bars to pass through are formed in the sections of prefabricated section hollow pier columns.
Further: and concrete pouring holes are formed in the side wall of the bottom second prefabricated section hollow pier stud.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the prefabricated section hollow pier stud produced in an industrial mode is stable in quality, only the pier body is installed and constructed on site, assembling and construction speed is high, construction period is saved, long-time overhead operation of workers is reduced or avoided, and construction safety risks are reduced. The cast-in-place concrete base with a certain height is reserved at the bottom of the pier column, so that the overall energy consumption of the structure is improved; according to the utility model, concrete with a certain height is poured into the first section of prefabricated section hollow pier column at the bottom, so that the bottom shearing force of the pier column is resisted, and the structure stability is enhanced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the first section of prefabricated section hollow pier stud at the bottom of the utility model after being matched with a bearing platform;
FIG. 3 is a schematic view showing the structures of the first prepared hole and the second prepared hole of the present invention.
Reference numerals: 1-a bearing platform; 2-a plurality of sections of prefabricated section hollow pier studs; 3-a capping beam; 4-prestressed steel strands; 5-U-shaped corrugated pipe; 6-first preformed hole; 7-finish rolling the deformed steel bar; 8-a second preformed hole; 9-concrete pouring holes; 10-pier stud base template; 11-first jack; 13-prefabricating a section hollow pier stud at the first section of the bottom; 14-prefabricating a section hollow pier stud at the second section at the bottom; 15-prefabricated section hollow pier stud at the top.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with the specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.
The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.
As shown in fig. 1 to 3, a pier body structure is assembled to prefabricated segment, including cushion cap 1 and bent cap 3, the hollow pier stud 2 of prefabricated segment of multisection is connected gradually to cushion cap 1 top, and the hollow pier stud 15's of prefabricated segment at top is connected bent cap 3, the inside of cushion cap 1, the hollow pier stud 2 of prefabricated segment of multisection and bent cap 3 is connected with prestressing force steel strand wires 4 in the vertical direction, and prestressing force steel strand wires 4's line body is the setting of U type, both ends and bent cap 3 fixed connection, has pour the concrete between the hollow pier stud 13 of the first section of prefabricated segment in bottom and the cushion cap 1, has poured the concrete in the hollow pier stud 13 of the first section of prefabricated segment in bottom.
U-shaped corrugated pipe 5 is pre-buried in the bearing platform 1, and the pipe shaft of U-shaped corrugated pipe 5 buries completely in the bearing platform 1, and the mouth of pipe at U-shaped corrugated pipe 5 both ends keeps level mutually with the bearing platform 1 surface, has all seted up first preformed hole 6 on bent cap 3 and the hollow pier stud 2 of multisection prefabricated segment, U-shaped corrugated pipe 5 and first preformed hole 6 form U type passageway, supply prestress wire 4 to run through the setting.
The bearing platform 1, the multi-section prefabricated section hollow pier stud 2 and the cover beam 3 form a hollow pier stud overall structure, and a prestressed steel strand 4 is arranged inside the side wall of each side of the hollow pier stud overall structure. In this embodiment, the prestressed steel strand 4 is composed of 31 steel strands, each steel strand is 7 wires, the cross-sectional area of each steel strand is 15.2mm, a high-strength low-relaxation steel strand with a standard strength of fpk Mpa-1860 Mpa is adopted, the tension control stress is 0.77fpk, and the tension control force is 6206 KN.
The connecting surfaces of two adjacent sections of prefabricated section hollow pier columns are connected by adopting a binder, the sections of prefabricated section hollow pier columns 2 are connected by adopting finish rolling deformed steel bars 7, the end parts of the finish rolling deformed steel bars 7 are respectively connected with the bearing platform 1 and the cover beam 3, and second preformed holes 8 for the finish rolling deformed steel bars 7 to pass through are formed in the sections of prefabricated section hollow pier columns 2. The diameter of the finish-rolled deformed steel bar 7 is 40mm, the strength is 1030MPa, and the tension control force is 1036 KN.
And a concrete pouring hole 9 is formed in the side wall of the bottom second prefabricated section hollow pier stud 14.
According to the utility model, the prestressed steel strands 4 and the finish-rolled deformed steel bars 7 are vertically adopted to form an integral prestress system for fixing the pier, wherein the finish-rolled deformed steel bars 7 have temporary positioning steel bars in the construction process and provide permanent prestress, so that the structural requirements are met, and meanwhile, the site construction is facilitated.
The utility model also provides a construction method of the prefabricated section assembled pier body structure, the prefabricated section hollow pier column 2 and the bent cap 3 are prefabricated, and the construction method comprises the following steps:
s1, conveying the multiple prefabricated section hollow pier columns 2 and the bent cap 3 prefabricated in a factory to a construction site, pre-burying a U-shaped corrugated pipe 5 and a first section of finish-rolled deformed steel bar in the construction process of a bearing platform 1, wherein the first section of finish-rolled deformed steel bar extends out of the upper part of the bearing platform 1, and the extension size of the first section of finish-rolled deformed steel bar is matched with the height of a single prefabricated section hollow pier column;
s2, after the construction of the bearing platform 1 is completed, connecting a second section of finish-rolled deformed steel on the top of the first section of finish-rolled deformed steel through a connecting sleeve, wherein the length of the second section of finish-rolled deformed steel is matched with the height of the single-section prefabricated section hollow pier stud; the method comprises the following steps that first jacks 11 are arranged at four corners in the installation range of the upper pier body of a bearing platform 1, and the tops of the first jacks 11 are higher than the top of the bearing platform 1 by a certain height, namely the height is 25cm in the embodiment;
s3, directly facing the first prefabricated section hollow pier column 13 at the bottom to the middle lofting position of the bearing platform 1 by using a crane, enabling the finish-rolled deformed steel bar 7 to pass through a second reserved hole 8 of the first prefabricated section hollow pier column 13 at the bottom, slowly lowering the first prefabricated section hollow pier column 13 at the bottom, enabling the side face of the bottom of the first prefabricated section hollow pier column to be in contact with the top of a first jack 11, clamping and positioning the first prefabricated section hollow pier column 13 at the bottom above the bearing platform 1 by the first jack 11 at a certain height, wherein the height is 25cm in the embodiment, and pouring concrete between the first prefabricated section hollow pier column 13 at the bottom and the bearing platform 1;
s4, connecting a third section of finish-rolled deformed steel bar 7 to the top of a second section of finish-rolled deformed steel bar through a connecting sleeve, uniformly brushing an adhesive on the upper surface of a first section of prefabricated section hollow pier stud 13 at the bottom, wherein the adhesive is an epoxy resin adhesive and the brushing thickness is 3mm, and putting a second section of prefabricated section hollow pier stud 14 at the bottom through the finish-rolled deformed steel bar 7 and down to the top of the first section of prefabricated section hollow pier stud 13 at the bottom;
s5, repeating the step S4 until the last section of the prefabricated section hollow pier stud is installed, hoisting the bent cap 3 to the top of the multiple sections of the prefabricated section hollow pier studs 2, and fixedly connecting the end part of the finish-rolled deformed steel bar 7 with the bent cap 3;
s6, enabling the prestressed steel strands 4 to penetrate through the first preformed holes 6 in the top surface of the bent cap beam 3, enabling the prestressed steel strands 4 to downwards sequentially penetrate through the multiple sections of prefabricated section hollow pier columns 2 and the U-shaped corrugated pipe 5, then enabling the prestressed steel strands 4 to be bent in the U-shaped corrugated pipe 5, and enabling the prestressed steel strands to upwards sequentially penetrate through the other end of the U-shaped corrugated pipe 5 and the other first preformed hole 6;
s7, synchronously pre-stressed tensioning is conducted on the two ends of the pre-stressed steel strand 4 through hydraulic jacks, the elongation of the two ends is kept basically consistent in the process, after the pre-stressed tensioning is completed, the end portion of the pre-stressed steel strand 4 is fixedly connected with the cover beam 3, grouting treatment is conducted on the U-shaped channel immediately (namely, finish-rolled deformed steel bar is tensioned, and grouting treatment is conducted on the U-shaped channel after tensioning is completed);
and S8, after grouting, performing concrete pouring on the interior of the first-section prefabricated hollow pier stud 13 through the concrete pouring hole 9 of the second-section prefabricated hollow pier stud 14 at the bottom, wherein in the embodiment, C30 concrete is adopted for pouring.
In the step S3, the pier stud base formwork 10 is installed between the outer wall surface of the first prefabricated section hollow pier stud 13 at the bottom and the bearing platform 1, and in this embodiment, after C40 concrete is poured inside the pier stud base formwork 10 and between the first prefabricated section hollow pier stud 13 at the bottom and the bearing platform 11, the first jack 11 and the pier stud base formwork 10 are removed.
In the step S4, before the second section of the prefabricated section hollow pier stud 14 at the bottom is hoisted, the top surface of the first section of the prefabricated section hollow pier stud 13 at the bottom is cleaned for the second time; slowly vertically transferring the bottom second section prefabricated section hollow pier stud 14 to the position 20cm away from the top of the bottom first section prefabricated section hollow pier stud 13, and cleaning the top surface of the bottom first section prefabricated section hollow pier stud 13 for the second time.
In the step S7, the prestress tension is performed in three stages, i.e., N1, N2 and N3, wherein the tension strength of N1 is 15% to 20%, the tension strength of N2 is 75%, and the tension strength of N3 is 100%. And (4) performing pipeline grouting immediately after the prestress tensioning is finished, and maintaining for at least five days after the pore canal grouting.
In the step S7, the prestressed steel strand 4 is cut off by a grinding wheel cutting machine, after the cutting is completed, the anchor sealing reinforcing steel bars are installed according to design requirements, the anchor sealing reinforcing steel bars are firmly welded with the reinforcing steel bars of the capping beam 3, and concrete at the anchor sealing end is poured and maintained.
In the step S1, in the construction process of the bearing platform 1, the pipe orifice of the pre-buried U-shaped corrugated pipe 5 is filled with a PE rubber strip to prevent slurry leakage during concrete pouring from causing pipeline blockage, and 4 first finish-rolled deformed steel bars 7 are pre-buried at the top of the bearing platform 1. The multi-section prefabricated section hollow pier stud 2 and the bent cap 3 are installed and assembled by a flat transport vehicle in sequence and are hauled to a construction site section by section, namely, the vehicles or the prefabricated section hollow pier studs are numbered according to the reverse installation sequence of the prefabricated section hollow pier studs, and the on-site installation is facilitated. The construction method of field assembly by special equipment can obviously reduce the influence on normal traffic and environment around the construction site.
According to the description of the present invention and the accompanying drawings, those skilled in the art can easily manufacture or use the prefabricated segment assembled pier shaft structure and the construction method thereof, and can produce the positive effects described in the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (5)
1. The utility model provides a pier shaft structure is assembled to prefabricated segment, includes cushion cap (1) and bent cap (3), its characterized in that: the concrete pouring device is characterized in that the hollow pier stud (2) with the prefabricated sections at the top is sequentially connected to the top of the bearing platform (1), the top of the hollow pier stud (15) with the prefabricated sections at the top is connected with the prestressed steel strand (4) in the vertical direction, the wire body of the prestressed steel strand (4) is in a U-shaped arrangement, the two ends of the prestressed steel strand are fixedly connected with the cover beam (3), concrete is poured between the hollow pier stud (13) with the prefabricated sections at the first bottom and the bearing platform (1), and the concrete is poured into the hollow pier stud (13) with the prefabricated sections at the first bottom.
2. The prefabricated segment assembled pier body structure of claim 1, wherein: u type bellows (5) have been pre-buried in cushion cap (1) inside, all seted up first preformed hole (6) on bent cap (3) and the hollow pier stud of multisection prefabricated section (2), U type bellows (5) and first preformed hole (6) form U type passageway, supply prestressing force steel strand wires (4) to run through the setting.
3. The prefabricated segment assembled pier body structure of claim 1, wherein: the bearing platform (1), the multi-section prefabricated section hollow pier stud (2) and the cover beam (3) form a hollow pier stud overall structure, and a prestressed steel strand (4) is arranged inside the side wall of each side of the hollow pier stud overall structure.
4. The prefabricated segment assembled pier body structure of claim 1, wherein: the connecting surfaces of two adjacent sections of prefabricated section hollow pier columns are connected by adopting a binder, the sections of prefabricated section hollow pier columns (2) are connected by adopting finish rolling deformed steel bars (7), the end parts of the finish rolling deformed steel bars (7) are respectively connected with the bearing platform (1) and the cover beam (3), and second preformed holes (8) for the finish rolling deformed steel bars (7) to pass through are formed in the sections of prefabricated section hollow pier columns (2).
5. The prefabricated segment assembled pier body structure of claim 1, wherein: and a concrete pouring hole (9) is formed in the side wall of the second prefabricated section hollow pier column (14) at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122200917.4U CN216193973U (en) | 2021-09-10 | 2021-09-10 | Pier shaft structure is assembled to prefabricated segment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122200917.4U CN216193973U (en) | 2021-09-10 | 2021-09-10 | Pier shaft structure is assembled to prefabricated segment |
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| CN216193973U true CN216193973U (en) | 2022-04-05 |
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| CN202122200917.4U Active CN216193973U (en) | 2021-09-10 | 2021-09-10 | Pier shaft structure is assembled to prefabricated segment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832839A (en) * | 2021-09-10 | 2021-12-24 | 中国电建集团华东勘测设计研究院有限公司 | Prefabricated segment assembled pier body structure and construction method thereof |
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- 2021-09-10 CN CN202122200917.4U patent/CN216193973U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832839A (en) * | 2021-09-10 | 2021-12-24 | 中国电建集团华东勘测设计研究院有限公司 | Prefabricated segment assembled pier body structure and construction method thereof |
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