CN112900246B - Novel segment prefabricated assembled pier and assembling method thereof - Google Patents
Novel segment prefabricated assembled pier and assembling method thereof Download PDFInfo
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- CN112900246B CN112900246B CN202110081321.9A CN202110081321A CN112900246B CN 112900246 B CN112900246 B CN 112900246B CN 202110081321 A CN202110081321 A CN 202110081321A CN 112900246 B CN112900246 B CN 112900246B
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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 discloses a novel segmental prefabricated assembled pier and an assembling method thereof, wherein the assembled pier comprises a bottom bearing platform, prefabricated pier segments and a capping beam, wherein the bottom bearing platform is integrated with a bottom segment of the pier; the precast concrete pier main body sequentially comprises a bottom section, a middle section and a top section from top to bottom, wherein the bottom section and the bottom bearing platform are integrally cast; the top section is connected with the cover beam through steel plate girth welding with shear nails; compared with the traditional integral cast-in-place pier, the invention improves the construction quality, improves the construction speed and reduces the pollution to the environment on site by the form of prefabricating the segments in factories, simultaneously saves the connection between the bottom segments and the bottom bearing platform, improves the shear resistance and the ultimate bearing capacity in the horizontal direction, simultaneously has good anti-roll capability, self-resetting capability and excellent anti-seismic performance, and has good application prospect in the rapid construction of the substructure of the bridge.
Description
Technical Field
The invention relates to a novel assembly type prefabricated pier in the field of bridge engineering, in particular to an assembly type prefabricated pier with shear keys and an assembly method thereof.
Background
The pier is manufactured by adopting a traditional cast-in-place construction method, and the construction progress is limited by the height of a template, the binding of a reinforcement cage, the concrete pouring and the curing period; the construction quality is influenced by site environment conditions and skill level of constructors, so that the construction period is long, the construction efficiency is low, and the construction quality is difficult to ensure. The prefabrication and assembly of the pier can greatly improve the manufacturing level and the construction quality of the pier, improve the construction efficiency, shorten the construction period, reduce the labor cost and the engineering cost, and simultaneously can reduce the negative effects of construction noise and pollution on the society and the natural environment, thereby becoming a new development trend in the technical field of pier construction.
Disclosure of Invention
The invention aims to provide a novel segmental prefabricated assembled pier and an assembling method thereof. The concrete shear key with the U-shaped steel bars is introduced into the shear keys of the segment prefabricated assembled pier so as to improve the shearing resistance of the spliced part of the pier body segments, the unbonded prestressed steel bars are introduced so as to effectively improve the self-resetting capability of the structure, and the high-ductility concrete (ECC) is introduced so as to improve the energy consumption capability of the plastic hinge area of the segment prefabricated pier. The novel section prefabricated assembled pier can be widely applied to the field of assembled bridges, and particularly has great popularization and application values in areas with short construction period and high seismic intensity.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
a novel pier is assembled in prefabricated of segment, includes:
the bottom bearing platform is positioned at the bottommost part of the whole prefabricated assembly pier;
the bent cap is positioned at the top of the whole prefabricated assembly pier;
the prefabricated concrete pier main body sequentially comprises a bottom section, a middle section and a top section from top to bottom, wherein the bottom section and a bottom bearing platform are integrally cast;
the top section is connected with the cover beam through steel plate girth welding with shear nails;
at least one middle section is connected in series between the bottom section and the top section;
shear keys for avoiding shearing and dislocation between the sections are arranged between the bottom section and the middle section, between the middle sections and between the middle section and the top section;
vertical corrugated pipelines are reserved in the bottom bearing platform and each section of the precast concrete pier main body, the vertical corrugated pipelines are positioned at four corners of the sections, each pore channel is vertically communicated, and the centers of the pore channels are vertically aligned;
the bottom end of the vertical continuous steel bar is inserted in the bottom bearing platform and penetrates through the corrugated pipeline, and the other end of the vertical continuous steel bar is connected in the capping beam, so that the segment prefabricated bridge piers are connected into a whole;
in the middle section, a grouting opening is formed in the side surface of the middle section positioned at the bottommost part, and a grout outlet is formed in the side surface of the cover beam; the grouting opening is communicated with the vertical corrugated pipeline, and grouting materials are filled in a corrugated pipe pore passage to enable vertical steel bars in the corrugated pipe to be tightly connected with the corrugated pipe;
and the anchoring end of the prestressed reinforcement system is positioned in the center of the bottom surface of the bottom bearing platform, and passes through the center of the pier main body and then is tensioned and anchored in the center of the top surface.
The middle sections are of the same structure and are of a cylindrical structure with a hollow rectangular cross section, and four edges of the cylindrical structure are respectively reserved with one vertical corrugated pipeline;
the hoop is arranged in the middle section, the hoop is in a rectangular frame shape, and the hoop is arranged in the longitudinal direction and the transverse direction of the middle section in a layered and split mode.
Grooves are preset on the periphery of the upper surface of the bottom section and the periphery of the upper surface of each middle section; bulges matched with the grooves are preset on the periphery of the lower surface of the top section and the periphery of the lower surface of each middle section, and the shear key is formed by the structure.
The bulge is in a quadrangular frustum pyramid shape, a plurality of U-shaped steel bars are arranged in the quadrangular frustum pyramid shape bulge, and the U-shaped steel bars are connected with the stirrups.
The middle section is provided with four connecting steel bars which are uniformly surrounded around the vertical corrugated pipeline, and the connecting steel bars are connected with the stirrups in a binding manner.
A reserved hole for penetrating the vertical continuous steel bar is reserved in the steel plate with the shear nail; the shear nails are embedded into the top sections and the cover beams.
The prestressed reinforcement system comprises a protective sleeve, prestressed reinforcements, anchoring steel plates and an anchorage device, wherein the protective sleeve is arranged outside the prestressed reinforcements, the upper ends of the prestressed reinforcements are connected with the center of the top surface of the cover beam through the first anchoring steel plates and the anchorage device, and the lower ends of the prestressed reinforcements are connected with the center of the bottom surface of the bottom bearing platform in a socket joint mode through the second anchoring steel plates and the anchorage device.
The shear key is made of a concrete material with the same strength grade as the main body material of the precast concrete pier.
The material of the bottom section is a high-ductility fiber reinforced cement-based composite material.
The invention further discloses an assembling method based on the novel segmental prefabricated assembled pier, which comprises the following steps:
s1, processing each part of a pier bottom bearing platform, a bottom section, a middle section, a top section, a cover beam and the like;
s2, installing and positioning a bottom bearing platform, wherein a vertical continuous steel bar with one end anchored at the bottom end of the bottom bearing platform extends out of the bottom segment, and a vertical unbonded prestressed steel bar anchored at the center of the bottom bearing platform through a second anchoring steel plate and an anchorage device extends out through a hole reserved in the center of the bottom bearing platform;
s3, installing a middle section provided with a grouting opening on the fixed bottom bearing platform and the fixed bottom section, inserting vertical continuous steel bars into a middle section corrugated pipe pore passage, and inserting vertical unbonded prestressed steel bars into the hollow of the middle section;
s4, sequentially installing the remaining middle sections at the upper end of the middle section provided with the grout inlet until reaching the top section, and repeating the step S3;
s5, installing a bent cap on the top segment, inserting vertical continuous steel bars into a bent cap corrugated pipe hole to extend to the top end of the bent cap for anchoring, and stretching and anchoring the vertical unbonded prestressed steel bars at the center of the top of the bent cap through a first anchoring steel plate and an anchorage device; welding the top sections and the peripheries of the steel plates of the bent cap to connect the top sections and the bent cap;
s6, grouting from the grouting opening on the side surface of the middle section at the lower part until grouting material is discharged from the grouting opening on the side surface of the bent cap,
and assembling all parts of the prefabricated assembled pier.
Has the advantages that: compared with the existing assembly type pier, the invention has the following advantages:
firstly, the influence of the connection mode of the splicing seams between the pier body sections of the prefabricated pier on the stress performance of the prefabricated pier is obvious. The shear key structure can avoid shearing dislocation among the segments to cause structural failure, thereby improving the shearing resistance of the pier and improving the positioning precision among the pier segments. Meanwhile, the U-shaped steel bars are arranged in the shear keys, so that the shear resistance and bearing capacity of the shear keys are improved, the failure of the shear keys among the sections due to brittle failure is avoided, and the positioning accuracy among the bridge pier sections is improved.
And secondly, the unbonded prestressed steel bars penetrate through the bottoms of the bottom bearing platforms, the pier bodies and the bent caps to integrate the base bottom bearing platforms, the pier bodies and the bent caps, so that the lateral rigidity resistance and the limit bearing capacity in the horizontal direction of the pier bodies are improved, and the self-resetting capacity of the piers is improved. Meanwhile, the unbonded prestressed steel bars can be integrally pulled, the performance of the prestressed steel bundles is fully exerted, and the prestressed loss is easy to detect and the prestressed steel bars are easy to replace.
And thirdly, the high-ductility concrete (ECC) has strong self-healing capacity, can improve the durability of the member in a complex environment, has extremely high strength, toughness, damage resistance and crack resistance, can improve the strength and ductility of the member when being applied to the plastic hinge area of the bottom section of the section prefabricated bridge pier, and is very good for improving the anti-seismic performance of the section prefabricated bridge pier.
The invention relates to a novel segmental prefabrication and assembly pier which has shear keys and unbonded prestressed reinforcement and adopts high-ductility concrete (ECC) at the bottom segment of a plastic hinge area, and has wide application prospect in the technical field of bridge segmental prefabrication and assembly.
Drawings
FIG. 1 is a schematic view of the overall structure of a prefabricated assembly pier of the invention;
FIG. 2 is a schematic view of a connection structure between a bottom bearing platform and a bottom section of the prefabricated bridge pier;
FIG. 3a is a schematic structural view of the upper end face of a middle section with a grouting opening of a prefabricated bridge pier;
FIG. 3b is a schematic view of the lower end face structure of the middle section with a grouting opening of the prefabricated bridge pier;
FIG. 4a is a schematic structural view of the upper end face of the middle section of the prefabricated bridge pier of the present invention;
FIG. 4b is a schematic structural view of the lower end face of the middle section of the prefabricated bridge pier of the present invention;
FIG. 5a is a schematic structural view of the upper end face of the top segment of the prefabricated bridge pier of the present invention;
FIG. 5b is a schematic view of the lower end face structure of the top segment of the prefabricated bridge pier of the present invention;
FIG. 6 is a schematic structural view of a steel plate with shear pins according to the present invention;
FIG. 7 is a schematic view of a system of pre-stressed reinforcement bars according to the present invention;
fig. 8a is a schematic diagram of arrangement of reinforcing steel bars in a prefabricated pier segment according to the invention;
fig. 8b is a top view of the upper surface of a prefabricated pier segment according to the present invention;
the figure shows that: the device comprises a bottom bearing platform and bottom section connecting structure 1, a middle section 2 with a grouting opening, a middle section 3, a top section 4, a bent cap 5, a bent cap and top section connecting structure 6 and a prestressed reinforcement system 7;
a bottom bearing platform 101, a bottom section 102 and vertical continuous steel bars 103;
a shear key 8 and a groove 9;
a steel plate 601, a shear nail 602 and a steel plate preformed hole 603;
a protective sleeve 701, prestressed reinforcements 702, an anchoring steel plate 703 and an anchorage 704;
connecting steel bars 1101, stirrups 1102 and U-shaped steel bars 1103.
The specific implementation mode is as follows:
other advantages and features of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein it is shown and described only exemplary embodiments of the invention. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
In this embodiment, a novel pier is assembled in prefabricated section, including bottom cushion cap 1, middle prefabricated section pier, bent cap 5, the shear force nail 602 and the external unbonded prestressed reinforcement system of being connected between pier and the bent cap of section at the bottom of taking, bottom cushion cap 1, middle prefabricated section pier and bent cap 5 of section at the bottom of taking assemble the connection in proper order through vertical prestressed reinforcement from bottom to top, the vertical prestressing force of pier realize through pier center unbonded prestressed reinforcement stretch-draw, unbonded prestressed reinforcement stiff end be located bottom cushion cap bottom surface center, stretch-draw end is located bent cap top surface center.
In this embodiment, the bottom bearing platform 1 integrally cast with the bottom section includes a bottom bearing platform 101, a bottom section 102 and a vertical continuous steel bar 103, wherein the bottom section 102 and the bottom bearing platform 101 are integrally cast in situ.
In this embodiment, middle prefabricated segment pier includes bottom segment, middle segment and top segment from bottom to top in proper order, and middle segment is the quadrangular prism that the cross-section is hollow rectangle. Shear keys for avoiding shearing dislocation between the sections are arranged between the bottom section and the middle section, between the middle sections and between the middle section and the top section;
each segment is provided with stirrups in the longitudinal direction and the transverse direction in a layered and faceted manner, and the stirrups are rectangular frames.
In this embodiment, 4 vertical corrugated pipes are reserved in each segment of the bottom bearing platform 101 and the pier main body, the vertical corrugated pipes in the segments are located at four corners of the prefabricated segment pier, each hole is vertically through, and centers of the vertical corrugated pipes are vertically aligned; the bottom end of the vertical continuous steel bar is inserted into the bottom bearing platform, penetrates through the corrugated pipeline, and the other end of the vertical continuous steel bar is connected into the capping beam, so that the segment prefabricated bridge pier is connected into a whole.
In the embodiment, the shear key structure is a raised quadrangular frustum pyramid concrete shear key, raised concrete shear keys are preset on four sides of the lower surface of the middle section, grooves matched with the shear keys in geometric dimension are preset on four sides of the upper surface, and particularly, the grooves are preset on the periphery of the upper surface of the bottom section, and the lower surface is directly and integrally cast with the bottom bearing platform without the shear keys;
the periphery of the lower surface of the top section is preset with a convex concrete shear key, and the upper surface is not provided with a groove and the embedded shear nails are welded with the steel plate.
A plurality of U-shaped steel bars are arranged in the concrete shear key and connected with stirrups in the pier main body; the shear resistance and the bearing capacity of the shear keys are improved, the failure of the shear keys among the sections due to brittle failure is avoided, and meanwhile, the positioning precision among the bridge pier sections is improved.
In this embodiment, the connection structure of the capping beam and the top pier comprises a steel plate and a shear pin. The upper surface of the top section is pre-embedded with a steel plate with shear nails, the lower surface of the bent cap 5 is pre-embedded with the same steel plate with shear nails, and the steel plate on the top section 4 is connected with the steel plate on the bottom surface of the bent cap 5 in a girth welding mode;
in this embodiment, the external unbonded prestressed reinforcement system is composed of an outer protective sheath 701, prestressed reinforcements 702, an anchoring steel plate 703 and an anchorage device.
In the embodiment, the material of the concrete shear key is consistent with that of the corresponding pier main body segment, the material of the pier at the bottom segment adopts high-ductility fiber reinforced cement-based composite material (ECC), and the materials of the middle segment, the top segment, the bottom bearing platform and the capping beam are all common concrete;
the invention relates to an assembling method based on a novel segment prefabricated assembled pier, which comprises the following steps:
s1, processing each part of a pier bottom bearing platform, a bottom section, a middle section, a top section, a cover beam and the like;
s2, installing and positioning a bottom bearing platform, wherein a vertical continuous steel bar with one end anchored at the bottom end of the bottom bearing platform extends out of the bottom segment, and a vertical unbonded prestressed steel bar anchored at the center of the bottom bearing platform through a second anchoring steel plate and an anchorage device extends out through a hole reserved in the center of the bottom bearing platform;
s3, installing a middle section provided with a grouting opening on the fixed bottom bearing platform and the fixed bottom section, inserting vertical continuous steel bars into a middle section corrugated pipe pore passage, and inserting vertical unbonded prestressed steel bars into the hollow of the middle section;
s4, sequentially installing the remaining middle sections at the upper end of the middle section provided with the grout inlet until reaching the top section, and repeating the step S3;
s5, installing a bent cap on the top segment, inserting vertical continuous steel bars into a bent cap corrugated pipe hole to extend to the top end of the bent cap for anchoring, and stretching and anchoring the vertical unbonded prestressed steel bars at the center of the top of the bent cap through a first anchoring steel plate and an anchorage device; welding the top sections and the peripheries of the steel plates of the bent cap to connect the top sections and the bent cap;
s6, grouting from the grouting opening on the side surface of the middle section at the lower part until grouting is discharged from the grouting opening on the side surface of the bent cap,
and assembling all parts of the prefabricated assembled pier.
Finally, in which the drawings are for illustrative purposes only, schematic and non-physical representations are intended, and are not to be construed as limiting the present invention; for a better explanation of the embodiments of the present invention, some parts 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 above preferred embodiments are only intended to illustrate the technical solution of the present invention and not to limit, and although the present invention has been described in detail by the above preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention defined by the claims.
Claims (9)
1. The utility model provides a pier is assembled in prefabricated of novel festival section which characterized in that includes:
the bottom bearing platform is positioned at the bottommost part of the whole prefabricated assembly pier;
the bent cap is positioned at the top of the whole prefabricated assembly pier;
the precast concrete pier main body sequentially comprises a bottom section, a middle section and a top section from bottom to top, wherein the bottom section and a bottom bearing platform are integrally cast;
the top section is connected with the cover beam through steel plate girth welding with shear nails;
at least one middle section is connected in series between the bottom section and the top section;
shear keys for avoiding shearing and dislocation between the sections are arranged between the bottom section and the middle section, between the middle sections and between the middle section and the top section;
vertical corrugated pipelines are reserved in the bottom bearing platform and each section of the precast concrete pier main body, the vertical corrugated pipelines are positioned at four corners of the sections, each pore channel is vertically communicated, and the centers of the pore channels are vertically aligned;
the bottom end of the vertical continuous steel bar is inserted in the bottom bearing platform and penetrates through the corrugated pipeline, and the other end of the vertical continuous steel bar is connected in the capping beam, so that the segment prefabricated bridge piers are connected into a whole;
in the middle section, a grouting opening is formed in the side surface of the middle section positioned at the bottommost part, and a grout outlet is formed in the side surface of the cover beam; the grouting opening is communicated with the vertical corrugated pipeline, and grouting materials are filled in a corrugated pipe pore passage to enable vertical steel bars in the corrugated pipe to be tightly connected with the corrugated pipe;
the anchoring end of the prestressed reinforcement system is positioned in the center of the bottom surface of the bottom bearing platform, penetrates through the center of the pier main body and then is tensioned and anchored in the center of the top surface;
the material of the bottom section is a high-ductility fiber reinforced cement-based composite material;
the bottom of the bottom cushion cap, the pier body and the bent cap penetrate through the unbonded prestressed reinforcement, so that the bottom cushion cap of the base, the pier body and the bent cap are integrated;
a plurality of U-shaped steel bars are arranged in the concrete shear key and connected with stirrups in the pier main body.
2. The novel segmental precast assembled pier according to claim 1,
the middle sections are of the same structure and are of a cylindrical structure with a hollow rectangular cross section, and four edges of the cylindrical structure are respectively reserved with one vertical corrugated pipeline;
the hoop is arranged in the middle section, the hoop is in a rectangular frame shape, and the hoop is arranged in the longitudinal direction and the transverse direction of the middle section in a layered and split mode.
3. The novel segment prefabricated assembling pier according to claim 2, wherein grooves are preset on the periphery of the upper surface of the bottom segment and the periphery of the upper surface of each middle segment; bulges matched with the grooves are preset on the periphery of the lower surface of the top section and the periphery of the lower surface of each middle section, and the shear key is formed by the structure.
4. The novel segmental prefabricated assembling pier according to claim 3, wherein the protrusions are quadrangular frustum pyramid-shaped, a plurality of U-shaped steel bars are arranged in the quadrangular frustum pyramid-shaped protrusions, and the U-shaped steel bars are connected with the stirrups.
5. The novel section prefabricated assembled pier is characterized in that four connecting steel bars are uniformly arranged on the middle section around each vertical corrugated pipeline in a surrounding mode, and the connecting steel bars are connected with stirrups in a binding mode.
6. The novel segmental prefabricated pier for splicing as claimed in claim 1,
a reserved hole for penetrating the vertical continuous steel bar is reserved in the steel plate with the shear nail; the shear nails are embedded into the top section and the cover beam.
7. The novel segmental prefabricated pier for splicing as claimed in claim 1,
the prestressed reinforcement system comprises a protective sleeve, prestressed reinforcements, anchoring steel plates and an anchorage device, wherein the protective sleeve is arranged outside the prestressed reinforcements, the upper ends of the prestressed reinforcements are connected with the center of the top surface of the cover beam through the first anchoring steel plates and the anchorage device, and the lower ends of the prestressed reinforcements are connected with the center of the bottom surface of the bottom bearing platform in a socket joint mode through the second anchoring steel plates and the anchorage device.
8. The novel segmental prefabrication and assembly pier according to claim 1, wherein the shear keys are made of concrete materials with the strength grade consistent with that of a main body material of a prefabricated concrete pier.
9. An assembling method for a novel segment prefabricated assembled pier based on any one of claims 1-8 is characterized by comprising the following steps:
s1, processing each part of a pier bottom bearing platform, a bottom section, a middle section, a top section and a cover beam;
s2, installing and positioning a bottom bearing platform, wherein a vertical continuous steel bar with one end anchored at the bottom end of the bottom bearing platform extends out of the bottom segment, and a vertical unbonded prestressed steel bar anchored at the center of the bottom bearing platform through a second anchoring steel plate and an anchorage device extends out through a hole reserved in the center of the bottom bearing platform;
s3, installing a middle section provided with a grouting opening on the fixed bottom bearing platform and the fixed bottom section, inserting vertical continuous steel bars into a middle section corrugated pipe pore passage, and inserting vertical unbonded prestressed steel bars into the hollow of the middle section;
s4, sequentially installing the remaining middle sections at the upper end of the middle section provided with the grout inlet until reaching the top section, and repeating the step S3;
s5, installing a bent cap on the top segment, inserting vertical continuous steel bars into a bent cap corrugated pipe hole to extend to the top end of the bent cap for anchoring, and stretching and anchoring the vertical unbonded prestressed steel bars at the center of the top of the bent cap through a first anchoring steel plate and an anchorage device; welding the top sections and the peripheries of the steel plates of the bent cap to connect the top sections and the bent cap;
s6, grouting from the grouting opening on the side surface of the middle section at the lower part until grouting material is discharged from the grouting opening on the side surface of the bent cap,
and assembling all parts of the prefabricated assembled pier.
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| CN113356012A (en) * | 2021-06-25 | 2021-09-07 | 青海省交通建设管理有限公司 | Assembly type bridge structure in tunnel and construction method thereof |
| CN113699876A (en) * | 2021-09-24 | 2021-11-26 | 江苏瑞沃建设集团有限公司 | Pier is assembled in prefabricated of segment of vertical continuous band tenon fourth of twelve earthly branches structure |
| CN114319080B (en) * | 2022-01-17 | 2024-06-04 | 宁波市高等级公路建设管理中心 | High strength bent cap structure based on UHPC shell |
| CN114382005B (en) * | 2022-02-28 | 2023-12-12 | 南京理工大学 | Segment-assembled pier with stair performance and construction method thereof |
| CN114673077A (en) * | 2022-03-21 | 2022-06-28 | 中铁第四勘察设计院集团有限公司 | Ultra-high performance concrete gate-type pier structure and construction method |
| CN114753239B (en) * | 2022-03-30 | 2023-04-07 | 河南大学 | Assembly type subsection pier column connecting node adopting prestress connection and construction method thereof |
| CN116537244A (en) * | 2023-07-06 | 2023-08-04 | 交通运输部公路科学研究所 | Combined underwater bridge Liang Zhuangji and construction method thereof |
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| KR100499977B1 (en) * | 2002-10-24 | 2005-07-07 | 노윤근 | Reinforced concrete unit pier block using prestressed concrete steel wire assembly and H-beam, and constructing method of fabricated reinforced concrete pier using the unit pier block |
| KR100704874B1 (en) * | 2005-12-15 | 2007-04-09 | 주식회사 포스코건설 | Structures of prefabricated concrete pier strengthened in shear by steel pipe |
| CN104343080B (en) * | 2014-09-29 | 2016-10-05 | 北京工业大学 | Basis bridge pier structure mode is waved in precast segment assembly |
| CN107435293B (en) * | 2017-07-06 | 2019-02-15 | 东南大学 | Pre-stress FRP bar stretching and anchoring device and its construction method for precast assembly bridge pier |
| CN207277176U (en) * | 2017-09-28 | 2018-04-27 | 中交第一公路勘察设计研究院有限公司 | A kind of precast assembly bridge pier attachment device |
| CN110468694B (en) * | 2019-09-06 | 2024-04-30 | 郑州大学 | Socket type self-resetting multi-section prefabricated pier and assembly method thereof |
| CN111335153A (en) * | 2020-03-10 | 2020-06-26 | 西南交通大学 | Assembled hollow pier and construction method thereof |
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| CN112900246A (en) | 2021-06-04 |
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