CN108301317B - Assembled pier structure and construction method thereof - Google Patents
Assembled pier structure and construction method thereof Download PDFInfo
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- CN108301317B CN108301317B CN201810337447.6A CN201810337447A CN108301317B CN 108301317 B CN108301317 B CN 108301317B CN 201810337447 A CN201810337447 A CN 201810337447A CN 108301317 B CN108301317 B CN 108301317B
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 142
- 239000010959 steel Substances 0.000 claims abstract description 142
- 238000011065 in-situ storage Methods 0.000 claims abstract description 67
- 239000004567 concrete Substances 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 210000000038 chest Anatomy 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
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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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- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an assembled pier structure and a construction method thereof, wherein the manufacture of a prefabricated pier body and the pouring of a cast-in-situ column pier foundation are completed, the prefabricated pier body and the cast-in-situ column pier foundation are positioned by fixedly connecting a longitudinal rib extension section of the pier body poured into the prefabricated pier body and a reinforced bar extension section in the cast-in-situ column pier foundation, and finally concrete is poured into an open-pore steel pipe of the prefabricated pier body until the connecting section and the steel pipe are filled with the pier body concrete, so that the assembly of each part of the pier is completed. The invention introduces an assembled system consisting of the prefabricated pier body, the cast-in-situ column pier foundation and the connecting section, solves the problem of difficult support of the pier and the foundation in the existing assembled pier, and ensures the reliability of the component assembly process; the problem that concrete at the connecting section in the existing fabricated bridge pier cannot be poured compactly is solved, and the integrity and the firmness of the assembled components are guaranteed; the invention locally strengthens the plastic hinge area at the bottom of the pier, thereby improving the shearing resistance, energy consumption and shock resistance of the pier.
Description
Technical Field
The invention relates to the technical field of bridge engineering construction, in particular to an assembled pier structure and a construction method thereof.
Background
The assembled bridge pier is characterized in that the bridge pier is split into a plurality of components along the vertical modularization, such as a capping beam (pier cap), a pier body, a bearing platform, a pile foundation and the like, and is manufactured in a factory or a prefabricated field, and then transported to a construction field for field assembly. Compared with cast-in-situ bridge pier, the method has the advantages that: the factory prefabrication and other on-site construction stages can be performed simultaneously, so that the construction period is shortened; the factory standardized manufacturing is beneficial to quality assurance and reduces labor cost; is beneficial to environmental protection and has stronger adaptability under complex climates and environments.
At present, in actual engineering in China, a mode of splicing prefabricated multi-section pier bodies is generally adopted for connection, and the splicing and connecting method needs to embed reinforcing steel bar connecting sleeves in prefabricated sections of the pier bodies. Along with the increase of pier body height, the festival section of pier body increases in a large number, and the reinforcing bar connecting sleeve quantity that needs pre-buried also increases correspondingly simultaneously, has improved the cost of manufacturing the pier stand greatly.
In another prefabrication assembly connection method which is commonly used at present, prefabrication sections of the upright posts are connected into a whole in a mode of penetrating prestress steel strands into through holes reserved in the upright posts. As disclosed in chinese patent CN103374881a, a pier structure system is assembled by prefabricating segments, which comprises a bearing platform, wherein a pier body is arranged on the bearing platform, the pier body and the bearing platform are provided with prestressed reinforcement, the pier body is composed of a plurality of interconnected precast reinforced concrete segments, prestressed channels are reserved in the precast reinforced concrete segments, the prestressed reinforcement is arranged in the prestressed channels in a penetrating manner, one end of the prestressed reinforcement is connected with an anchoring end positioned on the bearing platform, and the other end of the prestressed reinforcement is connected with the anchoring end positioned on the top of the pier body. According to the method, the segments are connected into a whole in a manner of splicing joints in the segments and prestressing in the post-tensioned bodies, however, prestressed steel bars or steel strands are corroded due to the fact that contact is not compact between the connecting faces of the segments, accurate positioning and grouting of all parts are required in the splicing construction process, the construction process is complex, and the integrity of the assembled pier is poor.
In the period of large-scale traffic construction, urban overhead, high-speed rail, cross-sea bridge piers and the like are the application fields of the lower structure segment splicing construction technology. Therefore, those skilled in the art are required to study a prefabricated pier which is low in construction cost and fast in progress without arranging a prestressed steel strand and an embedded steel bar connecting sleeve in a prefabricated pier body section.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a construction form and a construction method of an integrally assembled bridge pier for a bridge, aiming at the defects of the prior art. The invention adopts an assembled bridge pier structure form formed by the prefabricated bridge pier body, the cast-in-situ bridge pier foundation and the connecting section, the plastic hinge area at the bottom end of the bridge pier is locally reinforced, and the stability and the anti-seismic performance of the assembled bridge are improved; the novel construction method of prefabricating pier bodies and cast-in-situ pier foundations firstly and then casting steel pipe concrete and then casting the steel pipe concrete is adopted, so that the concrete casting compactness of the connecting section is ensured, and the assembly and connection process of prefabricated components is simplified so as to improve the engineering efficiency and reliability.
The technical scheme of the invention is as follows:
the assembled pier structure comprises a prefabricated pier body 1, a cast-in-situ pier foundation 2 and a connecting section 3, wherein the prefabricated pier body 1 is fixedly connected with the cast-in-situ pier foundation 2 through the connecting section 3;
the prefabricated pier body 1 comprises a steel pipe 4, pier body concrete 5 and pier body longitudinal ribs 6, wherein the steel pipe 4 is positioned in the center of the interior of the prefabricated pier body 1 and is of a variable cross-section structure, the upper part 41 of the steel pipe is thinner than the lower part 42 of the steel pipe, and the upper part 41 of the steel pipe is connected with the lower part 42 of the steel pipe through an annular steel plate 43 in the middle; the lower part 42 of the steel pipe is provided with an extension section along the bottom of the prefabricated pier body 1, and the periphery of the extension section is provided with an upper row of holes and a lower row of holes; the steel pipe 4 is equipped with one deck pier body concrete 5 and pier body longitudinal reinforcement 6 outward, and pier body longitudinal reinforcement 6 is circular distribution, and pier body longitudinal reinforcement 6 has one section extension along prefabricated pier body 1 bottom.
The diameter of the upper part 41 of the steel pipe is not smaller than one fifth of the diameter of the prefabricated pier body 1, the diameter of the lower part 42 of the steel pipe is not smaller than one third of the diameter of the prefabricated pier body 1, and the length of the lower part 42 of the steel pipe is not smaller than twice of the diameter of the prefabricated pier body 1.
The elongated section of the lower part 42 of the steel pipe is provided with a circular opening, the diameter of which is one third of the diameter of the lower part 42 of the steel pipe, and the distance between the upper row of openings and the lower row of openings is twice the diameter of the opening.
The length of the extension section of the lower part 42 of the steel pipe is not less than 400mm plus ten times the sum of the diameters of the longitudinal ribs 6 of the pier body, the length of the extension section of the longitudinal ribs 6 of the pier body is not less than two thirds of the extension section of the lower part 42 of the steel pipe, and the distance between the longitudinal ribs of the extension section of the longitudinal ribs 6 of the pier body is equal to the distance between the reinforcing bars of the extension section of the reinforcing bars of the foundation 2 of the cast-in-situ column pier.
The cast-in-situ column pier foundation 2 consists of foundation concrete 7 and column pier foundation steel bars 8, the cast-in-situ column pier foundation 2 is integrally cylindrical, a groove is arranged in the center of the top of the cast-in-situ column pier foundation 2, and the groove is circular; the diameter of the groove is the same as that of the lower part 42 of the steel pipe, and the depth of the groove is not less than one sixth of the 2 th of the foundation of the cast-in-situ pier; a row of longitudinal bars with the smallest distance from the inner side of the groove in the column pier foundation steel bars 8 is provided with an extension section along the top of the cast-in-situ column pier foundation 2; the length of the elongation section of the pier foundation steel bar 8 is not less than two thirds of the length of the lower elongation section of the steel pipe.
The construction method of the assembled pier structure comprises the following steps:
step one, manufacturing a prefabricated pier body 1: firstly, cutting the upper steel pipe 41, the lower steel pipe 42 and the annular steel plate 43, and fixing the upper steel pipe 41, the annular steel plate 43 and the lower steel pipe 42 together in sequence through welding; binding the pier body longitudinal ribs 6 in the prefabricated pier body 1, and temporarily fixing the bridge pier longitudinal rib cage formed by the bound pier body longitudinal ribs 6 on the outer side of the steel pipe 4; then erecting a template outside the longitudinal rib cage of the pier, pouring pier body concrete 5 outside the steel pipe 4, and manufacturing the prefabricated pier body 1;
step two, manufacturing a cast-in-situ column pier foundation 2: firstly, cutting pier foundation steel bars 8, and binding the pier foundation steel bars 8 in the cast-in-situ pier foundation 2 to form a pier foundation steel bar cage; then, erecting a template outside the reinforcement cage of the pier foundation, and erecting a circular template of a central groove at the top of the pier foundation; finally pouring foundation concrete 7, and completing the manufacture of the cast-in-situ column pier foundation;
pouring the connecting section 3, and assembling each part of the bridge pier: firstly, aligning the lower part 42 of a steel pipe of a prefabricated pier body 1 with a groove of a cast-in-situ pier foundation 2 for accurate positioning, hoisting the prefabricated pier body 1, and positioning the prefabricated pier body 1 and the cast-in-situ pier foundation 2; then welding the extension section of the longitudinal rib 6 of the pier body 1 of the prefabricated pier with the extension section of the reinforcing steel bar of the cast-in-situ pier foundation 2, and preliminarily fixing the prefabricated pier body 1 and the cast-in-situ pier foundation 2; and erecting a template at the connecting section 3, pouring concrete into the steel pipe 4, and vibrating while pouring until pier body concrete 5 fills the connecting section 3 and the steel pipe 4, thereby completing the assembly of each part of the pier.
Compared with the existing assembly pier technology, the invention has the following effects and benefits:
1. the invention introduces an assembled system consisting of the prefabricated pier body, the cast-in-situ column pier foundation and the connecting section, solves the problem of difficult support of the pier and the foundation in the existing assembled pier, and ensures the reliability of the component assembly process. The assembly system is fixedly connected with the longitudinal rib extension section of the prefabricated pier body and the reinforced bar extension section in the cast-in-situ column pier foundation, so that the support strength between the prefabricated pier body of the prefabricated pier and the cast-in-situ column pier foundation is improved, and the stability of the pier body is ensured; the accurate positioning of the prefabricated pier body and the cast-in-situ column pier foundation is ensured through the arrangement of the same size of the lower part of the steel pipe of the prefabricated pier body and the groove of the cast-in-situ column pier foundation, the problems that the prefabricated pier body is difficult to support and the perpendicularity is difficult to control in the construction process are solved, and the prefabricated pier body is more reliable in connection than the conventional prefabricated segment assembly type bridge pier.
2. The invention provides a construction mode of pouring concrete to the lower part of the pier through the opening at the lower part of the steel pipe, solves the problem that the concrete at the connecting section in the existing assembled pier cannot be poured compactly, and ensures the integrity and the firmness of the assembled components. At present, in actual engineering in China, the segments are assembled and bridge piers are connected by wet joints, and the segments are connected into a whole by adopting a post-tensioning body internal prestress mode, however, steel bars or steel strands are corroded due to non-compact contact among segment connecting surfaces, in addition, grouting is needed in a reserved pipeline, and the construction process is complex; the construction method is characterized in that the prefabricated pier body and the cast-in-situ column pier foundation are initially fixed, a small amount of templates are erected on the connecting section, concrete is poured into the steel pipe, and the problem that the concrete pouring of the connecting section of the fabricated pier is compact is solved.
3. The invention introduces the core steel tube concrete column structure form into the precast pier main body component, combines the advantages of the common reinforced concrete column and the steel tube concrete column, locally strengthens the plastic hinge area at the pier bottom, and improves the shearing resistance, the energy consumption and the shock resistance of the pier. The core concrete filled steel tube column structure form introduced by the precast pier main body member utilizes the advantages of strong compression resistance and shear resistance, good displacement ductility and strong energy consumption of the concrete filled steel tube, and greatly improves the earthquake resistance of the pier; meanwhile, due to the supporting effect of pier bottom core concrete filled steel tube, the residual deformation of the pier can be reduced, the rotation capacity of the pier bottom plastic hinge is improved, the repairability after earthquake and emergency disaster recovery function are improved, and the direct and indirect earthquake loss caused by bridge damage can be greatly reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
FIG. 2 is a schematic cross-sectional view of the interior of the structure of the present invention.
FIG. 3 is a schematic view of the upper section of the steel pipe according to the present invention.
Fig. 4 is a schematic view of a section of the lower part of the steel pipe according to the present invention.
FIG. 5 is a schematic cross-sectional view of a cast-in-place pier foundation of the present invention.
Fig. 6 is a schematic cross-sectional view of a prefabricated pier body according to the present invention.
Fig. 7 is a schematic diagram of a connecting section structure of a prefabricated pier body and a cast-in-situ pier foundation according to the present invention.
Fig. 8 is a schematic diagram of the overall structure assembly construction of the present invention.
Fig. 9 is a schematic diagram of the prefabricated pier body and cast-in-situ pier foundation assembly construction process according to the present invention.
In the figure: 1, prefabricating pier bodies; 2, a cast-in-situ column pier foundation; 3, connecting sections; 4, steel pipes; 41 upper part of the steel pipe; 42 lower part of the steel pipe; 43 annular steel plate; 5 pier body concrete; 6, pier body longitudinal ribs; 7, foundation concrete; 8 pier foundation steel bars.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the following technical schemes (and accompanying drawings).
The invention relates to an assembled pier structure and a construction method thereof, as shown in figures 1-9.
The assembled pier structure comprises a prefabricated pier body 1, a cast-in-situ pier foundation 2 and a connecting section 3, wherein the prefabricated pier body 1 is fixedly connected with the cast-in-situ pier foundation 2 through the connecting section 3;
the prefabricated pier body 1 comprises a steel pipe 4, pier body concrete 5 and pier body longitudinal ribs 6, wherein the steel pipe 4 is positioned in the center of the interior of the prefabricated pier body 1 and is of a variable cross-section structure, the upper part 41 of the steel pipe is thinner than the lower part 42 of the steel pipe, and the upper part 41 of the steel pipe is connected with the lower part 42 of the steel pipe through an annular steel plate 43 in the middle; the lower part 42 of the steel pipe is provided with an extension section along the bottom of the prefabricated pier body 1, and the periphery of the extension section is provided with an upper row of holes and a lower row of holes; the steel pipe 4 is equipped with one deck pier body concrete 5 and pier body longitudinal reinforcement 6 outward, and pier body longitudinal reinforcement 6 is circular distribution, and pier body longitudinal reinforcement 6 has one section extension along prefabricated pier body 1 bottom.
The diameter of the upper part 41 of the steel pipe is not smaller than one fifth of the diameter of the prefabricated pier body 1, the diameter of the lower part 42 of the steel pipe is not smaller than one third of the diameter of the prefabricated pier body 1, and the length of the lower part 42 of the steel pipe is not smaller than twice of the diameter of the prefabricated pier body 1.
The elongated section of the lower part 42 of the steel pipe is provided with a circular opening, the diameter of which is one third of the diameter of the lower part 42 of the steel pipe, and the distance between the upper row of openings and the lower row of openings is twice the diameter of the opening.
The length of the extension section of the lower part 42 of the steel pipe is not less than 400mm plus ten times the sum of the diameters of the longitudinal ribs 6 of the pier body, the length of the extension section of the longitudinal ribs 6 of the pier body is not less than two thirds of the extension section of the lower part 42 of the steel pipe, and the distance between the longitudinal ribs of the extension section of the longitudinal ribs 6 of the pier body is equal to the distance between the reinforcing bars of the extension section of the reinforcing bars of the foundation 2 of the cast-in-situ column pier.
The cast-in-situ column pier foundation 2 consists of foundation concrete 7 and column pier foundation steel bars 8, the cast-in-situ column pier foundation 2 is integrally cylindrical, a groove is arranged in the center of the top of the cast-in-situ column pier foundation 2, and the groove is circular; the diameter of the groove is the same as that of the lower part 42 of the steel pipe, and the depth of the groove is not less than one sixth of the 2 th of the foundation of the cast-in-situ pier; a row of longitudinal bars with the smallest distance from the inner side of the groove in the column pier foundation steel bars 8 is provided with an extension section along the top of the cast-in-situ column pier foundation 2; the length of the elongation section of the pier foundation steel bar 8 is not less than two thirds of the length of the lower elongation section of the steel pipe.
The construction method of the assembled pier structure comprises the following steps:
step one, manufacturing a prefabricated pier body 1: firstly, cutting the upper steel pipe 41, the lower steel pipe 42 and the annular steel plate 43, and fixing the upper steel pipe 41, the annular steel plate 43 and the lower steel pipe 42 together in sequence through welding; binding the pier body longitudinal ribs 6 in the prefabricated pier body 1, and temporarily fixing the bridge pier longitudinal rib cage formed by the bound pier body longitudinal ribs 6 on the outer side of the steel pipe 4; then erecting a template outside the longitudinal rib cage of the pier, pouring pier body concrete 5 outside the steel pipe 4, and manufacturing the prefabricated pier body 1;
step two, manufacturing a cast-in-situ column pier foundation 2: firstly, cutting pier foundation steel bars 8, and binding the pier foundation steel bars 8 in the cast-in-situ pier foundation 2 to form a pier foundation steel bar cage; then, erecting a template outside the reinforcement cage of the pier foundation, and erecting a circular template of a central groove at the top of the pier foundation; finally pouring foundation concrete 7, and completing the manufacture of the cast-in-situ column pier foundation;
pouring the connecting section 3, and assembling each part of the bridge pier: firstly, aligning the lower part 42 of a steel pipe of a prefabricated pier body 1 with a groove of a cast-in-situ pier foundation 2 for accurate positioning, hoisting the prefabricated pier body 1, and positioning the prefabricated pier body 1 and the cast-in-situ pier foundation 2; then welding the extension section of the longitudinal rib 6 of the pier body 1 of the prefabricated pier with the extension section of the reinforcing steel bar of the cast-in-situ pier foundation 2, and preliminarily fixing the prefabricated pier body 1 and the cast-in-situ pier foundation 2; and erecting a template at the connecting section 3, pouring concrete into the steel pipe 4, and vibrating while pouring until pier body concrete 5 fills the connecting section 3 and the steel pipe 4, thereby completing the assembly of each part of the pier.
Claims (8)
1. The construction method of the assembled pier structure is characterized in that the assembled pier structure comprises a prefabricated pier body (1), a cast-in-situ pier foundation (2) and a connecting section (3), and the prefabricated pier body (1) is fixedly connected with the cast-in-situ pier foundation (2) through the connecting section (3);
the prefabricated pier body (1) comprises a steel pipe (4), pier body concrete (5) and pier body longitudinal ribs (6), the steel pipe (4) is positioned at the inner center of the prefabricated pier body (1) and is of a variable cross-section structure, the upper part (41) of the steel pipe is thin relative to the lower part (42) of the steel pipe, and the upper part (41) of the steel pipe is connected with the lower part (42) of the steel pipe through an annular steel plate (43) in the middle; the lower part (42) of the steel pipe is provided with an extension section along the bottom of the prefabricated pier body (1), and the periphery of the extension section is provided with an upper row of holes and a lower row of holes; the steel pipe (4) is externally provided with a layer of pier body concrete (5) and pier body longitudinal ribs (6), the pier body longitudinal ribs (6) are distributed circularly, and the pier body longitudinal ribs (6) are provided with an extension section along the bottom of the prefabricated pier body (1);
the cast-in-situ column pier foundation (2) consists of foundation concrete (7) and column pier foundation steel bars (8), the cast-in-situ column pier foundation (2) is integrally cylindrical, a groove is formed in the center of the top of the cast-in-situ column pier foundation (2), and the groove is circular;
the lower part (42) of the steel pipe of the prefabricated pier body (1) is positioned in the groove of the cast-in-situ pier foundation (2) and is fixedly connected through the connecting section (3);
the construction method comprises the following steps:
step one, manufacturing a prefabricated pier body (1): firstly, cutting an upper steel pipe (41), a lower steel pipe (42) and an annular steel plate (43), and fixing the upper steel pipe (41), the annular steel plate (43) and the lower steel pipe (42) together in sequence through welding; binding pier body longitudinal ribs (6) in the prefabricated pier body (1), and temporarily fixing a pier longitudinal rib cage formed by the bound pier body longitudinal ribs (6) on the outer side of the steel pipe (4); then erecting a template outside the longitudinal rib cage of the pier, pouring pier body concrete (5) outside the steel pipe (4), and manufacturing the prefabricated pier body (1);
step two, manufacturing a cast-in-situ column pier foundation (2): firstly, cutting pier foundation steel bars (8), and binding the pier foundation steel bars (8) in the cast-in-situ pier foundation (2) to form a pier foundation steel bar cage; then, erecting a template outside the reinforcement cage of the pier foundation, and erecting a circular template of a central groove at the top of the pier foundation; finally, pouring foundation concrete (7), and completing the manufacture of the cast-in-situ column pier foundation;
pouring the connecting section (3), and assembling each part of the bridge pier: firstly, aligning the lower part (42) of a steel pipe of a prefabricated pier body (1) with a groove of a cast-in-situ pier foundation (2) for accurate positioning, hoisting the prefabricated pier body (1), and positioning the prefabricated pier body (1) and the cast-in-situ pier foundation (2); then welding an extension section of a longitudinal rib (6) of the pier body (1) of the prefabricated pier with an extension section of a reinforcing steel bar of the cast-in-situ pier foundation (2), and preliminarily fixing the pier body (1) of the prefabricated pier with the cast-in-situ pier foundation (2); and erecting a template at the connecting section (3), pouring concrete into the steel pipe (4), and vibrating while pouring until pier body concrete (5) is filled in the connecting section (3) and the steel pipe (4), so as to complete the assembly of each part of the pier.
2. The construction method of the fabricated pier construction according to claim 1, wherein the diameter of the upper portion (41) of the steel pipe is not less than one fifth of the diameter of the prefabricated pier body (1), the diameter of the lower portion (42) of the steel pipe is not less than one third of the diameter of the prefabricated pier body (1), and the length of the lower portion (42) of the steel pipe is not less than twice of the diameter of the prefabricated pier body (1).
3. The construction method of the fabricated pier construction according to claim 1 or 2, wherein the elongated section of the lower portion (42) of the steel pipe is provided with a circular shape having a diameter of one third of the diameter of the lower portion (42) of the steel pipe and a distance between the upper and lower rows of openings is twice the diameter of the openings.
4. The construction method of the fabricated pier construction according to claim 1 or 2, wherein the length of the extension section of the lower portion (42) of the steel pipe is not less than 400mm plus ten times the sum of the diameters of the longitudinal ribs (6) of the pier body, the length of the extension section of the longitudinal ribs (6) of the pier body is not less than two thirds of the extension section of the lower portion (42) of the steel pipe, and the distance between the longitudinal ribs of the extension section of the longitudinal ribs (6) of the pier body is equal to the distance between the reinforcing bars of the extension section of the reinforcing bars of the cast-in-situ pier foundation (2).
5. The construction method of the assembled pier structure according to claim 3, wherein the length of the extension section of the lower portion (42) of the steel pipe is not less than 400mm plus ten times the diameter of the longitudinal pier rib (6), the length of the extension section of the longitudinal pier rib (6) is not less than two thirds of the extension section of the lower portion (42) of the steel pipe, and the distance between the longitudinal ribs of the extension section of the longitudinal pier rib (6) is equal to the distance between the reinforcing bars of the extension section of the reinforcing bars of the cast-in-situ pier foundation (2).
6. The construction method of the fabricated pier construction according to claim 1, 2 or 5, wherein the diameter of the groove is the same as the diameter of the lower part (42) of the steel pipe, and the depth of the groove is not less than one sixth of the cast-in-situ pier foundation (2); a row of longitudinal bars with the smallest distance from the inner side of the groove in the column pier foundation steel bars (8) is provided with an extension section along the top of the cast-in-situ column pier foundation (2); the length of the elongation section of the pier foundation steel bar (8) is not less than two thirds of the length of the lower elongation section of the steel pipe.
7. A construction method of an assembled pier structure according to claim 3, wherein the diameter of the groove is the same as the diameter of the lower part (42) of the steel pipe, and the depth of the groove is not less than one sixth of the cast-in-situ pier foundation (2); a row of longitudinal bars with the smallest distance from the inner side of the groove in the column pier foundation steel bars (8) is provided with an extension section along the top of the cast-in-situ column pier foundation (2); the length of the elongation section of the pier foundation steel bar (8) is not less than two thirds of the length of the lower elongation section of the steel pipe.
8. The construction method of the fabricated pier construction according to claim 4, wherein the diameter of the groove is the same as the diameter of the lower part (42) of the steel pipe, and the depth of the groove is not less than one sixth of the cast-in-situ pier foundation (2); a row of longitudinal bars with the smallest distance from the inner side of the groove in the column pier foundation steel bars (8) is provided with an extension section along the top of the cast-in-situ column pier foundation (2); the length of the elongation section of the pier foundation steel bar (8) is not less than two thirds of the length of the lower elongation section of the steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337447.6A CN108301317B (en) | 2018-04-10 | 2018-04-10 | Assembled pier structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337447.6A CN108301317B (en) | 2018-04-10 | 2018-04-10 | Assembled pier structure and construction method thereof |
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| CN108301317A CN108301317A (en) | 2018-07-20 |
| CN108301317B true CN108301317B (en) | 2023-11-17 |
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| CN201810337447.6A Active CN108301317B (en) | 2018-04-10 | 2018-04-10 | Assembled pier structure and construction method thereof |
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