CN113585053B - Prefabricated assembled concrete-filled steel tube pier with out-of-site tension prestress and construction method thereof - Google Patents
Prefabricated assembled concrete-filled steel tube pier with out-of-site tension prestress and construction method thereof Download PDFInfo
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- CN113585053B CN113585053B CN202110935028.4A CN202110935028A CN113585053B CN 113585053 B CN113585053 B CN 113585053B CN 202110935028 A CN202110935028 A CN 202110935028A CN 113585053 B CN113585053 B CN 113585053B
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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
- E01D2101/268—Composite concrete-metal
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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
Abstract
The invention discloses an off-site tensioning prestressed prefabricated assembled concrete-filled steel tube pier and a construction method thereof, and belongs to the technical field of building bridges. The pier and the construction method solve the problem that the prestressed tendons are complex to stretch in the construction site of the prestressed connection prefabricated pier, and have the advantages of small site workload and quick construction.
Description
Technical Field
The invention belongs to the technical field of building bridges, and particularly relates to an off-site tensioning prestressed prefabricated assembled concrete filled steel tube pier and a construction method thereof.
Background
The segmental assembled pier has various connection modes, wherein the most widely applied grouting sleeve/corrugated pipe connection has the characteristic of equal cast-in-place, the anti-seismic design method is also designed according to the traditional ductility, the residual displacement after the earthquake is large, the horizontal and vertical bearing capacity loss is serious, and the restorability is poor; the prefabricated assembled pier connected based on the unbonded prestressed tendons has good self-resetting performance but poor energy consumption capability, and generally an external energy dissipater is arranged for improving the energy consumption capability of the pier, but has certain influence on the attractiveness of a bridge; and the tensioning of the prestressed reinforcing steel bars is generally completed on the construction site, which wastes time and labor.
Disclosure of Invention
In view of the above, the invention aims to provide an off-site tensioning prestressed prefabricated assembled concrete-filled steel tube pier and a construction method thereof, which solve the problem that the prestressed tendons of a prestressed connected prefabricated pier are complex to stretch in a construction site, and have the advantages of less site workload and quick construction.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses an off-site tensioning prestressed precast assembled concrete filled steel tube pier, which comprises at least two sections of steel tubes and filled concrete filled in the sections of steel tubes respectively, wherein the two adjacent sections of steel tubes are fixedly connected through pier column energy dissipation parts, prestressed tendons are tensioned between the filled concrete at two ends of the pier, through holes are correspondingly formed in the centers of the filled concrete, and the prestressed tendons are positioned in the through holes.
Further, the concrete-filled steel tube pier further comprises a temporary bracket, wherein the temporary bracket is detachably connected with the segment steel tube at the uppermost end and is used for temporarily supporting the prefabricated capping beam during assembly.
Further, interim bracket includes bracket steel pipe, steel ring, stiffening rib and bolt, the steel ring is fixed to be set up the one end of bracket steel pipe, the stiffening rib respectively with steel ring and bracket steel pipe fixed connection, the bracket steel pipe passes through bolt and the segmental steel pipe fixed connection of top.
Furthermore, a threaded connecting sleeve and an anchoring head are embedded in the filled concrete at the uppermost end, one end of the threaded connecting sleeve is fixedly connected with the anchoring head, and the other end of the threaded connecting sleeve is fixedly connected with the bolt.
Furthermore, a circular ring or a shear nail is fixedly arranged on the outer wall of the section steel pipe positioned at the lowest end.
Furthermore, the pier column cross-section of the concrete-filled steel tube pier is cylindrical or rectangular, the pier column energy dissipation part comprises an energy dissipation sheet, a cushion block is arranged between the energy dissipation sheet and the segment steel tube, the middle gap is filled with foam materials, and meanwhile, the foam materials are also filled between the pier column energy dissipation part and the internally filled concrete.
Further, the width of the middle of each pier column energy dissipation piece is narrower than that of the two ends of each pier column energy dissipation piece.
Further, the section steel pipe comprises a first section steel pipe and a second section steel pipe, first section filled concrete and second section filled concrete are poured in the first section steel pipe and the second section steel pipe correspondingly, one end of each prestressed tendon is stretched at one end of the second section filled concrete, the other end of each prestressed tendon is stretched in the middle of the first section filled concrete, and the first section steel pipe is connected with the prefabricated cover beam through a connecting steel bar slot.
Furthermore, the segment steel pipe at the uppermost end is connected in the prefabricated capping beam in a socket-and-spigot manner, and the segment steel pipe at the lowermost end is connected in the foundation bearing platform in a socket-and-spigot manner.
The construction method of the prefabricated assembled concrete filled steel tube pier with the external tensioning prestress adopts any one of the concrete filled steel tube piers, and comprises the following steps;
s1, preparing each section of steel pipe in a prefabrication factory;
s2, welding pier column energy dissipation parts and installing column top temporary brackets on the pipe walls of the segment steel pipes in the prefabricating factory;
s3, casting concrete in a prefabrication plant in sections, and stretching the prestressed tendons after the concrete reaches the design strength;
s4, prefabricating the capping beam in a factory, and constructing a bridge foundation and a bearing platform on a construction site;
s5, hoisting the prefabricated concrete-filled steel tube pier stud on the construction site, fixing the prefabricated concrete-filled steel tube pier stud in a reserved groove of a bearing platform, and grouting a socket joint;
s6, hoisting the prefabricated capping beam to the top of the prefabricated steel tube concrete pier stud, placing the prefabricated capping beam on a temporary bracket and temporarily fixing the prefabricated capping beam, and grouting and connecting the pier top and the capping beam node;
and S7, after the bent cap is reliably connected with the pier stud node, removing the temporary bracket and recycling.
The invention has the beneficial effects that:
according to the prefabricated assembled steel tube concrete pier tensioned with prestress outside the field and the construction method thereof, two adjacent sections of steel tubes are fixedly connected through pier column energy dissipation parts, the prestressed tendons are tensioned between the filled concretes at two ends of the pier, the steel tubes can be used as templates for concrete pouring, construction is more convenient, the sections of steel tubes, the filled concretes inside and the tensioned prestressed tendons can be directly prefabricated in a factory, and therefore the problem that the prestressed tendons are tensioned on the construction site of the prestressed connection prefabricated pier is solved, field workload is small, and construction is rapid; meanwhile, the pier has good self-resetting property and energy consumption capability, the steel pipe concrete pier column basically keeps elasticity or only generates small damage during strong earthquake, the residual displacement of the pier after the earthquake is small, and the good vertical bearing capability is kept.
Additional advantages, objects, and features of the invention will be set forth in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of FIG. 1;
FIG. 3 is a schematic view of the connection of energy dissipating elements of the pier stud;
FIG. 4 is a schematic view of a temporary carrier;
FIG. 5 is a schematic view of the attachment of the temporary bracket;
FIG. 6 is a schematic structural view of embodiment 3;
FIG. 7 is a schematic structural view of example 4;
FIG. 8 is a schematic structural view of example 2;
FIG. 9 is a schematic structural view of example 5;
FIG. 10 is a schematic view of the connection of energy dissipating sheets;
FIG. 11 is a schematic structural view of a dissipative sheet;
FIG. 12 is a schematic structural view of example 6;
fig. 13 is a construction flowchart of the concrete filled steel tube pier in example 1.
The drawings are numbered as follows: the prefabricated capping beam comprises a prefabricated capping beam 1, a first section of internally filled concrete 2, a first section of steel pipe 3, a second section of internally filled concrete 4, a second section of steel pipe 5, a foundation bearing platform 6, a prestressed tendon 7, a through hole 8, a pier column energy dissipation part 9, a connecting steel bar 10, a temporary bracket 11, a joint 12, an energy dissipation sheet 13, a foam material 14, a cushion block 15, a steel ring 16, a bracket steel pipe 17, a reinforcing rib 18, a bolt 19, a threaded connecting sleeve 20 and an anchoring head 21.
Detailed Description
In embodiment 1, as shown in fig. 1 to 7, in the prefabricated assembled concrete-filled steel tube pier with the external tensioning prestress, the cross section of the pier column of the concrete-filled steel tube pier is circular, the pier column comprises at least two segment steel tubes and inner filling concrete filled in the segment steel tubes, the segment steel tubes are cylindrical, other materials can be adopted, the steel tubes are low in cost, and welding is facilitated. The adjacent two segmental steel pipes are fixedly connected through the pier stud energy dissipation part 9, the pier stud energy dissipation part 9 can be made of sheets or ribs, in the embodiment, the pier stud energy dissipation part 9 is connected with the inner wall of the segmental steel pipe, the appearance is attractive, corrosion is not prone to occurring, the pier stud energy dissipation part can be selectively connected with the outer wall of the segmental steel pipe, and construction is facilitated. The prestressed tendons 7 are stretched between the infill concrete at two ends of the bridge pier, two ends of the prestressed tendons 7 are limited by the end plates through fixed connection, through holes 8 are correspondingly formed in the centers of the infill concrete, and the prestressed tendons 7 are located in the through holes 8.
In this embodiment, the segmental steel pipes include a first segmental steel pipe 3 and a second segmental steel pipe 5, first segmental infill concrete 2 and second segmental infill concrete 4 are respectively poured in the first segmental steel pipe 3 and the second segmental steel pipe 5 correspondingly, and the first segmental steel pipe 3 and the prefabricated capping beam 1 are connected in a slot-in manner through connecting steel bars 10.
According to the prefabricated assembled steel tube concrete pier with the external prestressed tensioning device, two adjacent sections of steel tubes are fixedly connected through the pier stud energy dissipation part 9, the prestressed tendons 7 are tensioned between the filled concretes at the two ends of the pier, the steel tubes can be used as templates for concrete pouring, construction is more convenient, the sections of steel tubes, the filled concretes inside and the tensioned prestressed tendons 7 can be directly prefabricated in a factory, and therefore the problem that the prestressed tendons 7 are tensioned on the construction site of the prefabricated pier with the prestressed connection is solved, field workload is small, and construction is rapid; meanwhile, the pier has good self-resetting property and energy consumption capability, the steel pipe concrete pier column basically keeps elasticity or only generates small damage during strong earthquake, the residual displacement of the pier after the earthquake is small, and the good vertical bearing capability is kept.
In this embodiment, concrete filled steel tube pier still includes interim bracket 11, interim bracket 11 can be dismantled continuously and be used for carrying out interim support to prefabricated bent cap 1 when the assembly with the segmental steel pipe of top, conveniently supports prefabricated bent cap 1 when the assembly to pour, through detachable connected mode, can reuse, use the environmental protection, practice thrift the cost.
In this embodiment, interim bracket 11 includes bracket steel pipe 17, steel ring 16, stiffening rib 18 and bolt 19, and the steel pipe can adopt the detachable connected mode of multistage segmental arc, convenient to detach, steel ring 16 is fixed to be set up bracket steel pipe 17's one end, stiffening rib 18 respectively with steel ring 16 and bracket steel pipe 17 fixed connection for strengthen the support, avoid warping, bracket steel pipe 17 passes through bolt 19 and the segmental steel pipe fixed connection of the top.
In this embodiment, be located pre-buried threaded connection sleeve 20 and the anchor head 21 in the filled concrete of top, threaded connection sleeve 20's one end with anchor head 21 fixed connection, the other end with 19 fixed connection of bolt, through setting up threaded connection sleeve 20, convenient dismantlement, anchor head 21 extends to filled concrete one end and is the hook type, can increase the anchor power, is provided with two sets of anchor heads 21 of symmetry in this embodiment, and the crotch of the anchor head 21 of every group is back to back, can increase the anchor power to filled concrete.
In this embodiment, the outer wall of the section steel pipe located at the lowermost end is fixedly provided with a ring or a shear nail, the whole prefabricated concrete-filled steel pipe pier column is erected in the groove of the foundation bearing platform 6, and grouting material is filled in the gap between the prefabricated concrete-filled steel pipe pier column and the foundation bearing platform, so that the connection is firmer, and the prefabricated concrete-filled steel pipe pier column is integrated.
Example 2 is different from example 1 in that, as shown in fig. 8, the cross section of the pier column of the concrete filled steel tube pier is rectangular, and the energy dissipation member 9 corresponding to the pier column is a reinforcement.
In embodiment 3, one end of the tendon 7 is tensioned at one end of the second section filled with the concrete 4, and the other end of the tendon 7 is tensioned at the middle of the first section filled with the concrete 2, so that the length of the tendon 7 can be saved.
Example 5, as shown in fig. 9 to 11, differs from example 1 in that in this example, a pier column cross section of the concrete-filled steel tube pier is rectangular, the energy dissipation member 9 corresponding to the pier column includes an energy dissipation sheet 13, the shape of the energy dissipation sheet 13 can be adaptively adjusted according to the cross-sectional shape of the concrete-filled steel tube pier, a spacer 15 is disposed between the energy dissipation sheet 13 and the segment steel tube, an intermediate space is filled with a foam material 14, and a foam material 14 is also filled between the pier column energy dissipation member 9 and the filled concrete.
In this embodiment, the width of the middle of the pier stud energy dissipation member 9 is narrower than that of the two ends, so that the pier stud energy dissipation member 9 is bent at the middle position, and the overall energy dissipation effect is better.
As shown in fig. 13, the construction method of the off-site tensioning prestressed precast assembled concrete filled steel tube pier adopts the concrete filled steel tube pier described in any one of the above steps, and includes the following steps;
s1, preparing each section of steel pipe in a prefabrication factory;
s2, welding pier stud energy dissipation parts 9 and a temporary column top bracket 11 on the pipe wall of the segment steel pipe in the prefabrication factory;
s3, casting concrete in a prefabrication plant in sections, and stretching the prestressed tendon 7 after the concrete reaches the design strength;
s4, prefabricating the bent cap 1 in a prefabricating factory, and simultaneously performing bridge foundation and bearing platform construction on a construction site;
s5, hoisting the prefabricated concrete-filled steel tube pier stud on the construction site, fixing the prefabricated concrete-filled steel tube pier stud in a reserved groove of a bearing platform, and grouting a socket joint;
s6, hoisting the prefabricated capping beam 1 to the top of the prefabricated steel tube concrete pier stud, placing the prefabricated capping beam on the temporary bracket 11 and temporarily fixing the prefabricated capping beam, and grouting and connecting the pier top and the capping beam node;
and S7, after the capping beam is reliably connected with the pier stud node, removing the temporary bracket 11 and recycling.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a steel pipe concrete pier is assembled in prefabrication of off-site stretch-draw prestressing force which characterized in that: the steel tube concrete pier comprises at least two segment steel tubes and internally filled concrete filled in the segment steel tubes respectively, wherein two adjacent segment steel tubes are fixedly connected through pier stud energy dissipation parts, the width of the middle of each pier stud energy dissipation part is narrower than that of two ends of each pier stud, a prestressed tendon is stretched between the internally filled concrete at two ends of the pier, a through hole is correspondingly formed in the center of the internally filled concrete, the prestressed tendon is positioned in the through hole, the steel tube concrete pier further comprises a temporary bracket, the temporary bracket is detachably connected with the segment steel tube at the uppermost end and is used for temporarily supporting the prefabricated capping beam during assembly, the segment steel tube at the uppermost end is connected in the prefabricated capping beam in a socket and spigot manner, the segment steel tube at the lowermost end is connected in a foundation bearing platform in a socket and spigot manner, the temporary bracket comprises a bracket steel tube, a steel ring, a reinforcing rib and a bolt, and the steel ring is fixedly arranged at one end of the bracket steel tube, the reinforcing ribs are respectively fixedly connected with the steel ring and the bracket steel pipe, and the bracket steel pipe is fixedly connected with the uppermost segment steel pipe through bolts; the pier column cross-section of the concrete filled steel tube pier is cylindrical or rectangular, the pier column energy dissipation part comprises an energy dissipation sheet, a cushion block is arranged between the energy dissipation sheet and the segment steel tube, a middle gap is filled with foam materials, and the foam materials are also filled between the pier column energy dissipation part and the filled concrete.
2. The precast assembled concrete-filled steel tube pier tensioned in an off-site manner and prestressed in accordance with claim 1, wherein: and a threaded connecting sleeve and an anchoring head are embedded in the filled concrete at the uppermost end, one end of the threaded connecting sleeve is fixedly connected with the anchoring head, and the other end of the threaded connecting sleeve is fixedly connected with the bolt.
3. The precast assembled concrete-filled steel tube pier tensioned in an off-site manner and prestressed in accordance with claim 1, wherein: and a circular ring or a shear nail is fixedly arranged on the outer wall of the section steel pipe positioned at the lowermost end.
4. The precast assembled concrete-filled steel tube pier tensioned and prestressed by an off-site tension as claimed in any one of claims 1 to 3, wherein: the segmental steel pipe comprises a first segmental steel pipe and a second segmental steel pipe, first segmental infill concrete and second segmental infill concrete are poured in the first segmental steel pipe and the second segmental steel pipe correspondingly, one end of each prestressed tendon is stretched at one end of the second segmental infill concrete, the other end of each prestressed tendon is stretched in the middle of the first segmental infill concrete, and the first segmental steel pipe is connected with the prefabricated cover beam in a slot type through connecting steel bars.
5. A construction method for a prefabricated assembled concrete filled steel tube pier with an off-site tensioning prestress is characterized by comprising the following steps: the concrete filled steel tube pier adopting any one of claims 2 to 4, comprising the following steps;
s1, preparing each section of steel pipe in a prefabrication factory;
s2, welding pier column energy dissipation parts and installing column top temporary brackets on the pipe walls of the segment steel pipes in the prefabricating factory;
s3, casting concrete in a prefabrication plant in sections, and stretching the prestressed tendons after the concrete reaches the design strength;
s4, prefabricating the capping beam in a factory, and constructing a bridge foundation and a bearing platform on a construction site;
s5, hoisting the prefabricated concrete-filled steel tube pier stud on the construction site, fixing the prefabricated concrete-filled steel tube pier stud in a reserved groove of a bearing platform, and grouting a socket joint;
s6, hoisting the prefabricated capping beam to the top of the prefabricated steel tube concrete pier stud, placing the prefabricated capping beam on a temporary bracket and temporarily fixing the prefabricated capping beam, and grouting and connecting the pier top and the capping beam node;
and S7, after the bent cap is reliably connected with the pier stud node, removing the temporary bracket and recycling.
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| CN202110935028.4A CN113585053B (en) | 2021-08-16 | 2021-08-16 | Prefabricated assembled concrete-filled steel tube pier with out-of-site tension prestress and construction method thereof |
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| CN202110935028.4A CN113585053B (en) | 2021-08-16 | 2021-08-16 | Prefabricated assembled concrete-filled steel tube pier with out-of-site tension prestress and construction method thereof |
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| CN114319081B (en) * | 2022-01-17 | 2024-01-02 | 宁波市高等级公路建设管理中心 | Prefabricated UHPC bent cap structure of quick installation |
| CN114319080A (en) * | 2022-01-17 | 2022-04-12 | 宁波市高等级公路建设管理中心 | High strength bent cap structure based on UHPC shell |
| CN116876330B (en) * | 2023-09-08 | 2023-11-28 | 福建省高速公路科技创新研究院有限公司 | UHPC prefabricated shell membrane and combined pier structure using same |
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| US8522381B1 (en) * | 2010-09-07 | 2013-09-03 | OCCI, Inc. | System and method for bridge pier replacement |
| CN104120647B (en) * | 2014-07-04 | 2016-09-14 | 上海应用技术学院 | It is suitable for section assembling concrete frame bridge pier system and the construction method of rapid construction |
| CN105735112B (en) * | 2016-04-14 | 2017-05-17 | 北京工业大学 | Bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier |
| CN105908621B (en) * | 2016-06-29 | 2017-12-22 | 北京工业大学 | It is a kind of to damage controllable Self-resetting precast segment steel-pipe assembly concrete pier and the practice |
| CN107675610B (en) * | 2017-10-29 | 2019-08-09 | 北京工业大学 | The construction and the practice of a kind of precast assembly bridge pier segment connection |
| CN109056506A (en) * | 2018-07-27 | 2018-12-21 | 北京市政路桥管理养护集团有限公司 | Plug-in type post-tensioning prestressing without bondn section assembling concrete pier of steel tube |
| CN110359363B (en) * | 2019-07-26 | 2021-01-01 | 山东建筑大学 | Partially-bonded prestressed assembly type self-resetting bridge pier column node and method |
| CN110777661B (en) * | 2019-10-29 | 2021-02-02 | 北京交通大学 | Flange connection prefabricated assembly pier structure and construction method thereof |
| CN212561133U (en) * | 2020-08-11 | 2021-02-19 | 郑州大学 | Pier is assembled in prefabricated festival segmentation high-intensity district |
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