CN113481870A - Prestressed anchoring structure system for assembling multi-segment bridge pier and assembling construction method of multi-segment bridge pier - Google Patents
Prestressed anchoring structure system for assembling multi-segment bridge pier and assembling construction method of multi-segment bridge pier Download PDFInfo
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- CN113481870A CN113481870A CN202110917011.6A CN202110917011A CN113481870A CN 113481870 A CN113481870 A CN 113481870A CN 202110917011 A CN202110917011 A CN 202110917011A CN 113481870 A CN113481870 A CN 113481870A
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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
- 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
- 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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Abstract
A prestressed anchoring structure system for assembling multi-section piers comprises a bent cap, n sections of pier column sections, a base platform, a prestressed steel strand anchoring structure assembly for connecting and anchoring the bent cap, and a temporary steel bar anchoring assembly consisting of n +2 steel bars, nuts and connecting sleeves; reinforcing steel bar penetrating ducts are arranged in the capping beam, the n sections of pier stud sections and the base station, and reaming sections for pier stud reinforcing steel bar connection are arranged at the lower ends of the reinforcing steel bar penetrating ducts of the capping beam and the pier studs of the sections; in the anchoring state, one end of a steel bar in the abutment is arranged in the abutment as a fixed end to be bonded and anchored with the abutment concrete, the other end of the steel bar extends out of the end surface of the abutment, and a pier stud steel bar of the nth section of pier stud is connected with a pier stud steel bar of the nth-1 section of pier stud through a connecting sleeve; the reinforcing steel bars of the sections of the bent caps are connected with the reinforcing steel bars of the pier columns of the nth section through the connecting sleeves; and the reinforcing steel bars in the base platform, the pier column reinforcing steel bars and the capping reinforcing steel bars are temporarily anchored through nuts respectively and provide pressing force, wherein n is more than or equal to 2 and less than or equal to 10. The temporary connection structure of the system is simple in structure; the construction is convenient.
Description
Technical Field
The invention relates to a prestressed anchoring structure system for assembling a pier and a construction method for assembling the pier, in particular to a prestressed anchoring structure system for assembling a multi-section pier and a construction method for assembling the multi-section pier.
Background
With the continuous implementation and promotion of the bridge pier prefabrication and assembly construction method in China, various assembly and connection technologies are continuously researched and applied; the pier-assembled prestressed connection is suitable for projects with large transverse loads and high seismic requirements, such as a sea-crossing bridge, a railway bridge, an urban viaduct and the like.
Generally, the prefabricated pier segments have height and weight limitations due to limitations of manufacturing technology, lifting capacity and installation process, so that the pier with higher height is often designed into a multi-segment structural form, such as two or three or more segments.
The prefabricated bridge pier is connected by a prestressed tendon which is usually a through-length prestressed tendon, a clamping piece type tensioning end anchorage device is arranged on the upper end surface of the uppermost section, and a self-locking fixed end anchorage device is arranged in a bridge pier base station; some projects (such as a cross-sea bridge) need to design a non-full-length prestressed tendon, a clamping piece type tensioning end anchorage device of the prestressed tendon is positioned on the top surface of each segment, and each segment is installed from bottom to top and is connected by using a prestressed anchorage so as to ensure the stability and safety of the installed segment. For example, the prefabricated pier engineering of the cross-sea bridge adopts the method of assembling, penetrating and binding, tensioning and grouting; the design has the main defects of complicated prestress construction process and lower construction efficiency.
For urban viaducts and railway bridges, the pier sections of the urban viaducts and railway bridges are smaller than those of sea-crossing bridges, the sections are generally of slender structures, and too many prestressed bundles are not required to be designed on the structures; the long and thin bridge pier is generally only provided with full-length prestressed tendons without non-full-length prestressed tendons, the periphery of each segment is temporarily connected and fixed with an upper segment and a lower segment (such as a screw rod, a nut and a connecting steel plate in a figure 4) by adopting steel members when being assembled, the full-length prestressed tendons are installed after all the segments are assembled, and the temporarily connected steel members are taken down and surface leveling treatment is carried out after the assembling; the main defects of the temporary connection are that the number of connecting points of the steel member is large, the operation is complex, a high-altitude operation platform needs to be built additionally, the steel member needs to be taken down and the surface is leveled after completion, and the appearance is affected.
Disclosure of Invention
The invention aims to: the prestressed anchoring structure system for assembling the multi-section bridge piers and the assembling construction method of the multi-section bridge piers are mainly suitable for urban viaducts and railway bridges with long and thin pier columns, and mainly achieve the following purposes: 1. the safety and reliability of connection of all bridge pier sections before prestress application of steel strands are ensured when the multiple sections are assembled, and the temporary connection structure is simple; 2. the temporary connection construction is convenient; 3. a high-altitude platform is not required to be built during temporary connection; 4. the temporary connecting component does not affect the appearance; to solve the above-mentioned shortcomings of the prior art.
The technical scheme for solving the problems is as follows: a prestressed anchoring structure system for assembling multi-section bridge piers comprises a bent cap, n sections of pier column sections, a base platform, a prestressed steel strand anchoring structure assembly and a temporary anchoring structure assembly, wherein the prestressed steel strand anchoring structure assembly and the temporary anchoring structure assembly are used for connecting and anchoring the bent cap;
the prestressed steel strand anchoring structure assembly comprises a fixed end anchorage device positioned in the base platform, a tensioning end anchorage device positioned on the top surface of the bent cap, a steel strand bundle and a prestressed duct for penetrating the steel strand bundle, wherein the fixed end anchorage device adopts a self-locking anchorage device, the tensioning end anchorage device adopts a clamping piece type anchorage device, and the steel strand bundle and the prestressed duct are designed in the base platform, the bent cap and each section of pier column in a through length mode; the method is characterized in that:
the temporary anchoring structure assembly is a temporary reinforcing steel bar anchoring assembly, and the temporary reinforcing steel bar anchoring assembly consists of n +2 reinforcing steel bars, nuts and connecting sleeves; reinforcing steel bar penetrating ducts are arranged in the bent cap, the n sections of pier stud sections and the base platform, and reaming sections of pier stud reinforcing steel bar connecting spaces are arranged at the lower ends of the reinforcing steel bar penetrating ducts of the bent cap and the sections of pier studs;
in the anchoring state, one end of the reinforcing steel bar in the base station is arranged in the base station as a fixed end to be bonded and anchored with the concrete of the base station, the other end of the reinforcing steel bar extends out of the end surface of the base station, and the pier stud reinforcing steel bar of the 1 st section of pier stud is connected with the reinforcing steel bar in the base station through the connecting sleeve; the pier stud steel bars of the section 2 pier stud are connected with the pier stud steel bars of the section 1 pier stud through the connecting sleeves, … …;
the pier stud steel bar of the nth section of pier stud is connected with the pier stud steel bar of the nth-1 section of pier stud through the connecting sleeve;
the reinforcing steel bars of the sections of the bent caps are connected with the reinforcing steel bars of the pier columns of the nth section through the connecting sleeves;
the reinforcing bars in the base station, the pier column reinforcing bars and the capping beam segment reinforcing bars are temporarily anchored through nuts respectively and provide pressing force, and the value range of n is that n is more than or equal to 2 and less than or equal to 10.
Another related technical scheme is as follows: the invention discloses a multi-segment bridge pier assembling construction method, which is a method for realizing bridge pier assembling construction by adopting a prestress anchoring structure system for assembling multi-segment bridge piers, and comprises the following steps:
A. prefabricating each section of pier stud and capping beam:
in a prefabrication field, installing an anchor lower component of the prestressed steel strand anchoring structure assembly, including an anchor backing plate, a spiral rib and a steel pipe, at a set position in a bent cap, prefabricating a steel bar penetrating pore channel and a reaming section for the temporary steel bar anchoring assembly and a prestressed pore channel for a steel strand penetrating in each section of pier column and the bent cap, and prefabricating each section of pier column and the bent cap according to design requirements;
b: 1 st section pier stud is assembled with the base station:
in a construction site, one end of a reinforcing steel bar in the base is arranged in the base as a fixed end to be bonded and anchored with the concrete of the base, the other end of the reinforcing steel bar extends out of the end face of the base, and then a pier stud reinforcing steel bar of a 1 st section of pier stud is connected with the reinforcing steel bar in the base through a connecting sleeve; then hoisting the 1 st section of pier stud to be assembled with the base station, temporarily anchoring pier stud reinforcing steel bars by nuts, and applying pre-pressure to the 1 st section of pier stud;
c: assembling the pier columns of all sections:
connecting the pier stud steel bars of the nth section of pier stud with the pier stud steel bars of the (n-1) th section of pier stud through a connecting sleeve, then hoisting the nth section of pier stud to be assembled with the (n-1) th section of pier stud, temporarily anchoring the pier stud steel bars of the (n-1) th section of pier stud by using nuts, and applying pre-pressure to the (n-1) th section of pier stud, wherein the value range of n is that n is more than or equal to 2 and less than or equal to 10;
when n is more than 2, repeating the above actions n-1 times;
D. assembling the bent cap and the nth section pier stud:
in a construction site, firstly, the steel bars of the sections of the bent caps are connected with the steel bars of the pier columns of the nth section of the pier columns through the connecting sleeves; hoisting the bent cap and assembling the bent cap with the nth section of pier stud, temporarily anchoring the bent cap section steel bar by using a nut, and applying pre-pressure to the bent cap section;
the value range of n is as follows: n is greater than or equal to 2 and less than or equal to 10;
E. the pre-stressed anchoring structure assembly is reeved and anchored by tension:
penetrating the steel strand into a prestress hole channel for penetrating the steel strand until a fixed end is a self-locking anchorage device, and performing tension anchorage on the steel strand at a tension end by using a clamping piece type anchorage device;
F. grouting a prestressed duct:
and (4) grouting and filling the prestressed duct and performing anchor sealing treatment on the prestressed notch on the top surface of the bent cap.
By adopting the technical scheme, the prestressed anchoring structure system for assembling the multi-segment bridge pier and the assembling construction method of the multi-segment bridge pier have the following characteristics and beneficial effects:
when guaranteeing that the multisection section is assembled, before the steel strand wires prestressing force is exerted, each pier section is connected safe and reliable, the temporary connection structure is simple in structure:
the temporary reinforcing steel bar anchoring assembly of the prestressed anchoring structure system for assembling the multi-section bridge pier is composed of n +2 reinforcing steel bars, a screw rod, a nut and a connecting sleeve, and is simple in structure.
The temporary connection anchoring construction is convenient, safe and reliable, and the high-altitude platform does not need to be built:
the temporary steel bar anchoring assembly of the prestressed anchoring structure system for assembling the multi-section pier is characterized in that the temporary steel bar anchoring assembly is arranged on the top surface of the pier, the top surface of the coping is connected with the top surface of the pier, and the top surface of the coping is connected with the top surface of the pier.
Thirdly, the temporary connecting component does not need post-treatment, and does not affect the appearance:
the temporary reinforcing steel bar anchoring assembly of the prestressed anchoring structure system for assembling the multi-section pier is arranged in the capping beam, each section of pier and the base station to form a part of the capping beam, each section of pier and the base station, has a reinforcing effect on the strength of the section, does not need to be processed, and does not influence the appearance of the section.
The present invention relates to a prestressed anchoring structure system for assembling a multi-segment bridge pier and a construction method for assembling a multi-segment bridge pier, and more particularly, to a prestressed anchoring structure system for assembling a multi-segment bridge pier and a construction method for assembling a multi-segment bridge pier.
Drawings
Fig. 1 is a schematic view (front view) of an overall structure and an assembled state of a prestressed anchoring structure system for assembling a multi-segment bridge pier according to an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
fig. 4 is a schematic view of a prior art pier connection structure using steel members as upper and lower segments.
In the figure:
1-clip type anchorage, 2-steel strand bundle, 21-prestressed duct, 3-self-locking anchorage and 4-nut (steel bar anchorage);
5-pier column reinforcing steel bars, 51-abutment inner reinforcing steel bars, 52-bent cap section reinforcing steel bars and 6-connecting sleeves;
7-passing through a steel bar hole channel; 701-a hole expanding section for passing through a steel bar hole channel, 8-a capping beam, 91-a section 1 pier column and 92-a section 2 pier column; 10-base station, 11-steel plate for connection, 12-screw and nut;
DG-pier column and capping beam assembling surface, D12-1 st section of pier column and 2 nd section of pier column assembling surface, DJ-1 st section of pier column and abutment assembling surface.
Detailed Description
The first embodiment is as follows:
a prestressed anchoring structure system for assembling multi-section bridge piers,
as shown in fig. 1, the prestressed anchoring structural system for assembling the multi-segment pier comprises a capping beam, 2 segments of pier column segments, a base platform, and prestressed strand anchoring structural components and temporary anchoring structural components for connecting and anchoring the capping beam and the base platform;
the prestressed steel strand anchoring structure assembly comprises a fixed end anchorage device positioned in the base platform 10, a stretching end anchorage device positioned on the top surface of the bent cap 8, a steel strand bundle 2 and a prestressed pore channel 21 for penetrating the steel strand bundle, wherein the fixed end anchorage device adopts a self-locking anchorage device 3, the stretching end anchorage device adopts a clamping piece type anchorage device 1, and the steel strand bundle 2 and the prestressed pore channel 21 are designed in the base platform 10, the bent cap 8, the 1 st section pier stud 91 and the 2 nd section pier stud 92 in length;
the temporary anchoring structure assembly is a temporary reinforcing steel bar anchoring assembly, and the temporary reinforcing steel bar anchoring assembly consists of 4 reinforcing steel bars, nuts and connecting sleeves; reinforcing steel bar penetrating ducts 7 are arranged in the bent cap, the 2 sections of pier stud segments and the base platform, and reaming sections 701 for spaces for connecting pier stud reinforcing steel bars of the upper and lower sections of pier studs are arranged at the lower ends of the bent cap 10 and the reinforcing steel bar penetrating ducts 7 of the sections of pier studs;
in the anchoring state, one end of the steel bar 51 in the base platform is arranged in the base platform as a fixed end to be bonded and anchored with the concrete of the base platform, the other end extends out of the end surface of the base platform, and the pier stud steel bar 5 of the 1 st section of pier stud is connected with the steel bar 51 in the base platform through the connecting sleeve 6; the pier stud steel bar 5 of the 2 nd section of pier stud is connected with the pier stud steel bar 5 of the 1 st section of pier stud through a connecting sleeve 6;
the base reinforcing steel bars, the pier column reinforcing steel bars and the bent cap section reinforcing steel bars are temporarily anchored through nuts respectively and provide pressing force; and in the construction process, firm connection between the abutment and the pier stud, between the upper section of pier stud and the lower section of pier stud and between the uppermost section of pier stud and the bent cap is ensured.
As a variation of the embodiment of the present invention, the number of the pier column segments can be increased to n, in which case, the pier column reinforcing steel bars 5 of the nth segment of pier column are connected with the pier column reinforcing steel bars 5 of the (n-1) th segment of pier column through the connecting sleeve 6;
the reinforcing steel bars 52 of the sections of the bent cap are connected with the pier stud reinforcing steel bars 5 of the nth section of the pier stud through the connecting sleeves 6;
the value range of n is 2 or more and 10 or less, and fig. 1 shows the case where n is 2 or less.
Example two:
a construction method for assembling multi-section bridge piers comprises the following steps:
the method is used for realizing the bridge pier assembling construction by adopting the prestressed anchoring structure system for assembling the multi-section bridge pier, and the prestressed anchoring structure system for assembling the multi-section bridge pier comprises a capping beam, 2 sections of pier column sections, a base platform, a prestressed steel strand anchoring structure assembly and a temporary anchoring structure assembly which are connected and anchored with the capping beam; the assembling construction method comprises the following steps:
A. prefabricating each section of pier stud and capping beam:
in a prefabrication field, installing an anchor lower component (comprising an anchor backing plate, a spiral rib and a steel pipe and not containing a steel strand) of the prestressed steel strand anchoring structure assembly in a set position in a bent cap, prefabricating a reinforcement penetrating hole channel 7 and a hole expanding section 701 used by the steel bar temporary anchoring assembly and a prestressed hole channel 21 used for penetrating the steel strand in each section of pier stud and the bent cap, and prefabricating each section of pier stud and the bent cap according to design requirements;
b: 1 st section pier stud is assembled with the base station:
in a construction site, one end of a steel bar 51 in the base platform is arranged in the base platform as a fixed end to be bonded and anchored with the concrete of the base platform, the other end of the steel bar extends out of the end face of the base platform, and then a pier stud steel bar 5 of a 1 st section of pier stud is connected with the steel bar 51 in the base platform through a connecting sleeve 6; then hoisting the 1 st section of pier stud to be assembled with the base station, temporarily anchoring pier stud reinforcing steel bars 5 by using nuts 4, and applying pre-pressure to the 1 st section of pier stud;
c: assembling the 2 nd section pier stud with the 1 st section pier stud:
in a construction site, firstly connecting pier stud steel bars 5 of a pier stud of a section 2 with pier stud steel bars 5 of a pier stud of a section 1 through a connecting sleeve 6, then hoisting the pier stud of the section 2 to be assembled with the pier stud of the section 1, temporarily anchoring the pier stud steel bars 5 by nuts 4, and applying pre-pressure to the section 2 of the pier stud;
D. assembling the bent cap and the 2 nd section pier stud:
in a construction site, firstly, the bent cap section steel bars 52 are connected with pier stud steel bars 5 of a 2 nd section pier stud through connecting sleeves 6; then hoisting the bent cap and assembling the bent cap with the 2 nd section of pier stud, temporarily anchoring the bent cap section steel bar 52 by using a nut 4, and applying pre-pressure to the bent cap section;
E. the pre-stressed anchoring structure assembly is reeved and anchored by tension:
penetrating the steel strand bundle 2 into a prestress hole channel 21 for penetrating the steel strand bundle until a fixed end self-locking anchorage device 3, and performing steel strand tensioning anchorage at a tensioning end by using a clamping piece type anchorage device 1;
F. grouting a prestressed duct:
and (3) grouting and filling the prestressed duct 21 and performing anchor sealing treatment on the prestressed notch on the top surface of the bent cap.
As a variation of the embodiment of the present invention, the pier stud segments of the pier may be increased, and after the number of pier stud segments is increased to n segments (n is greater than or equal to 3 and less than or equal to 10), the step C is divided into the following 2 steps, and the step D is also modified as follows:
c: assembling the pier columns of all sections:
c1: assembling the 2 nd section pier stud with the 1 st section pier stud:
in a construction site, firstly connecting pier stud steel bars 5 of a pier stud of a section 2 with pier stud steel bars 5 of a pier stud of a section 1 through a connecting sleeve 6, then hoisting the pier stud of the section 2 to be assembled with the pier stud of the section 1, temporarily anchoring the pier stud steel bars 5 by nuts 4, and applying pre-pressure to the section 2 of the pier stud;
c2: assembling the nth section pier stud with the nth-1 section pier stud:
connecting the pier stud steel bar 5 of the nth section of pier stud with the pier stud steel bar 5 of the nth-1 section of pier stud through a connecting sleeve 6, then hoisting the nth section of pier stud to be assembled with the nth-1 section of pier stud, temporarily anchoring the pier stud steel bar 5 of the nth-1 section of pier stud by using a nut 4, and applying pre-pressure to the nth-1 section of pier stud;
D. assembling the bent cap and the nth section pier stud:
in a construction site, firstly, the steel bars 52 of the sections of the bent caps are connected with the steel bars 5 of the pier columns of the nth section through the connecting sleeves 6; then hoisting the bent cap and assembling the bent cap with the nth section of pier stud, temporarily anchoring the bent cap section steel bar 52 by using a nut 4, and applying pre-pressure to the bent cap section;
the value range of n is as follows: n is not less than 3 and not more than 10.
Claims (2)
1. A prestressed anchoring structure system for assembling multi-section bridge piers comprises a bent cap, n sections of pier column sections, a base platform, a prestressed steel strand anchoring structure assembly and a temporary anchoring structure assembly, wherein the prestressed steel strand anchoring structure assembly and the temporary anchoring structure assembly are used for connecting and anchoring the bent cap;
the prestressed steel strand anchoring structure component comprises a fixed end anchorage device positioned in a base platform (10), a tensioning end anchorage device positioned on the top surface of a bent cap (8), a steel strand bundle (2) and a prestressed pore channel (21) for penetrating the steel strand bundle, wherein the fixed end anchorage device adopts a self-locking anchorage device (3), the tensioning end anchorage device adopts a clamping piece type anchorage device (1), and the steel strand bundle (2) and the prestressed pore channel (21) are designed in the base platform, the bent cap and each section of pier column in a full length mode;
the method is characterized in that:
the temporary anchoring structure assembly is a temporary reinforcing steel bar anchoring assembly, and the temporary reinforcing steel bar anchoring assembly consists of n +2 reinforcing steel bars, nuts and connecting sleeves; reinforcing steel bar penetrating ducts (7) are arranged in the bent cap, the n sections of pier stud segments and the base platform, and hole expanding sections (701) of spaces for connecting pier stud reinforcing steel bars are arranged at the lower ends of the reinforcing steel bar penetrating ducts (7) of the bent cap and the pier studs of the segments;
in the anchoring state, one end of a steel bar (51) in the base station is arranged in the base station as a fixed end to be bonded and anchored with the concrete of the base station, the other end of the steel bar extends out of the end surface of the base station, and a pier stud steel bar (5) of the 1 st section of pier stud is connected with the steel bar (51) in the base station through a connecting sleeve (6); the pier stud reinforcing steel bar (5) of the 2 nd section of pier stud is connected with the pier stud reinforcing steel bar (5) of the 1 st section of pier stud through a connecting sleeve (6), … …;
the pier stud steel bar (5) of the nth section of pier stud is connected with the pier stud steel bar (5) of the nth-1 section of pier stud through the connecting sleeve (6);
the bent cap section steel bar (52) is connected with the pier column steel bar (5) of the nth section pier column through the connecting sleeve (6);
the reinforcing bars in the base station, the pier column reinforcing bars and the capping beam segment reinforcing bars are temporarily anchored through nuts respectively and provide pressing force, and the value range of n is that n is more than or equal to 2 and less than or equal to 10.
2. A multi-segment bridge pier assembling construction method is characterized in that the method for realizing bridge pier assembling construction by adopting the prestress anchoring structure system for multi-segment bridge pier assembling of claim 1 comprises the following steps:
A. prefabricating each section of pier stud and capping beam:
in a prefabrication field, installing an anchor lower component of the prestressed steel strand anchoring structure assembly, including an anchor backing plate, a spiral rib and a steel pipe, at a set position in a bent cap, prefabricating a steel bar through hole (7) and a hole expanding section (701) for the temporary steel bar anchoring assembly and a prestressed hole (21) for a steel strand in each section of pier column and bent cap, and prefabricating each section of pier column and bent cap according to design requirements;
b: 1 st section pier stud is assembled with the base station:
in a construction site, one end of a steel bar (51) in the base is arranged in the base as a fixed end to be bonded and anchored with the concrete of the base, the other end of the steel bar extends out of the end face of the base, and then a pier stud steel bar (5) of a 1 st section of pier stud is connected with the steel bar (51) in the base through a connecting sleeve (6); then hoisting the 1 st section of pier stud to be assembled with the base station, temporarily anchoring pier stud reinforcing steel bars (5) by using nuts (4), and applying pre-pressure to the 1 st section of pier stud;
c: assembling the pier columns of all sections:
connecting the pier stud reinforcing steel bars (5) of the nth section of pier stud with the pier stud reinforcing steel bars (5) of the (n-1) th section of pier stud through a connecting sleeve (6), then hoisting the nth section of pier stud to be assembled with the (n-1) th section of pier stud, temporarily anchoring the pier stud reinforcing steel bars (5) of the (n-1) th section of pier stud by using nuts (4), and applying pre-pressure to the (n-1) th section of pier stud, wherein the value range of n is that n is more than or equal to 2 and less than or equal to 10;
when n is more than 2, repeating the above actions n-1 times;
D. assembling the bent cap and the nth section pier stud:
in a construction site, firstly, the bent cap section steel bar (52) is connected with the pier column steel bar (5) of the nth section pier column through the connecting sleeve (6); then hoisting the bent cap and assembling the bent cap with the nth section of pier stud, temporarily anchoring the bent cap section steel bar (52) by using a nut (4), and applying pre-pressure to the bent cap section;
the value range of n is as follows: n is greater than or equal to 2 and less than or equal to 10;
E. the pre-stressed anchoring structure assembly is reeved and anchored by tension:
penetrating the steel strand bundle (2) into a prestress hole channel (21) for penetrating the steel strand bundle until a fixed end self-locking anchorage device (3), and performing steel strand tensioning and anchoring at a tensioning end by using a clamping piece type anchorage device (1);
F. grouting a prestressed duct:
and (3) grouting and filling the prestressed duct (21) and performing anchor sealing treatment on the prestressed notch on the top surface of the bent cap.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110432A (en) * | 2022-07-28 | 2022-09-27 | 北京城建设计发展集团股份有限公司 | Installation method of vertical prestressed steel strand for connecting prefabricated bridge pier |
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| CN109457597A (en) * | 2018-10-22 | 2019-03-12 | 北京工业大学 | A kind of flat assembly prefabrication and assembly construction hollow pier splicing structure and its practice |
| CN110886204A (en) * | 2019-11-29 | 2020-03-17 | 重庆交通大学 | Prefabricated segment pier of assembled |
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| CN111827092A (en) * | 2020-06-29 | 2020-10-27 | 中国国家铁路集团有限公司 | Prefabricated assembled hollow pier suitable for being provided with diaphragm plate and construction method |
| CN111827095A (en) * | 2020-06-29 | 2020-10-27 | 中国国家铁路集团有限公司 | Prefabricated assembled hollow pier with built-in rib plates and construction method |
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| CN115110432A (en) * | 2022-07-28 | 2022-09-27 | 北京城建设计发展集团股份有限公司 | Installation method of vertical prestressed steel strand for connecting prefabricated bridge pier |
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