CN216892013U - Support counter-force pre-pressing system suitable for water area cable-stayed bridge super-large zero block - Google Patents
Support counter-force pre-pressing system suitable for water area cable-stayed bridge super-large zero block Download PDFInfo
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- CN216892013U CN216892013U CN202123169676.8U CN202123169676U CN216892013U CN 216892013 U CN216892013 U CN 216892013U CN 202123169676 U CN202123169676 U CN 202123169676U CN 216892013 U CN216892013 U CN 216892013U
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The utility model provides a support counter-force prepressing system suitable for an oversized zero block of a cable-stayed bridge in a water area, which comprises steel pipe piles distributed on two sides of a pier body, wherein the steel pipe piles are fixed on the side part of the pier body through a group of counterfort steel pipes from top to bottom, a distribution longitudinal beam penetrates through a square hole of the steel pipe piles, two ends of the distribution longitudinal beam are supported by an outer inclined strut of the steel pipe and an inner inclined strut of the steel pipe, a dumping block, a bearing cross beam, a lower reaction frame longitudinal beam, a reaction frame cross beam, a feed-through jack bed and a reaction frame longitudinal beam are sequentially paved on the distribution longitudinal beam, and a combined pressing beam is installed at two ends of the reaction frame longitudinal beam, wherein the combined pressing beam positioned in the range of the pier body is anchored through finish-rolled deformed steel bar embedded at the top of the pier body, and the combined pressing beam positioned at the end of the upper reaction frame longitudinal beam is anchored on a cofferdam through a steel strand connected with a cofferdam anchoring device. The utility model has the advantages of simple installation, convenient disassembly, high universality, wide application and reduced safety risk.
Description
Technical Field
The utility model relates to a support counter-force prepressing system suitable for an oversized zero block of a cable-stayed bridge in a water area, and belongs to the field of bridge construction.
Background
The short-tower cable-stayed bridge is also called as a partial cable-stayed bridge, is a novel bridge structure form between a continuous beam bridge and a cable-stayed bridge, and has the characteristics of the cable-stayed bridge and the continuous beam bridge and the characteristics of rigidity and flexibility, so that the short-tower cable-stayed bridge conforms to the structural stress characteristics, has the advantages of economy, attractive appearance, high rigidity, convenience in construction and the like, has good development potential, and is fully applied to high-speed railway construction.
The beam part of a part of cable-stayed bridge is generally a concrete beam, the requirement on section rigidity is high, the section size of a general zero block is large, and the concrete volume is large.
The pre-compaction mode of common support is the preloading, and this kind of pre-compaction mode process is loaded down with trivial details, wastes time and energy, and the construction is dangerous high, and to a great extent drags the construction progress slowly, has increased construction cost.
Along with the development of bridge technique, a frock and corresponding construction process that carries out the pre-compaction to the reaction frame through jack to the bracket of installing on the zero number piece have also appeared, but the waters cable-stayed bridge directly adopts this kind of method because construction environment influences, has the back pressure frame installation anchor distance not enough to lead to the insecure, the problem that the surface of water construction risk is big, therefore the reaction pre-compaction of waters cable-stayed bridge super large zero number piece support still has a great deal of difficulty to wait to solve urgently.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model provides a support counter-force prepressing system suitable for an oversized zero block of a cable-stayed bridge in a water area.
The technical scheme adopted by the utility model for solving the technical problem is as follows: the utility model provides a support counter-force pre-compaction system suitable for waters cable-stayed bridge super large zero block, which comprises steel pipe piles distributed on two sides of a pier body, wherein the steel pipe piles are fixed on the side part of the pier body through a group of buttress steel pipes from top to bottom, the top of the steel pipe pile is provided with a square hole in the horizontal direction, a distribution longitudinal beam penetrates through the square hole, the bottoms of two ends of the distribution longitudinal beam are respectively connected with the tops of an outer steel pipe inclined strut and an inner steel pipe inclined strut, the bottoms of the outer steel pipe inclined strut and the inner steel pipe inclined strut are fixed on the side part of the steel pipe pile, a group of bearing cross beams are laid on the distribution longitudinal beam, a group of lower reaction frame longitudinal beams are laid on the bearing cross beams, a group of reaction frame cross beams are laid on the lower reaction frame longitudinal beams, the reaction frame longitudinal beams are laid on the upper parts of the reaction frame cross beams through a center-penetrating jack, combined press beams are installed at two ends of the reaction frame longitudinal beams, wherein the combined press beams within the range of the pier body are anchored through finish rolling deformed steel bar pre-rolled on the top of the pier body, and the combined pressing beam positioned at the end of the upper reaction frame longitudinal beam is anchored on the cofferdam through a steel strand connected with the cofferdam anchoring device.
The buttress steel pipe is connected with the steel pipe pile through the steel pipe connection system of steel pipe pile lateral part installation, is connected with the pier shaft through the pre-buried awl built-in fitting that climbs of pier shaft lateral part simultaneously.
And gaps between the distribution longitudinal beams and the square holes of the steel pipe piles are blocked by steel plates.
The climbing cone embedded part comprises mutually connected climbing cone embedded part plates and a climbing cone nut and a bolt which are arranged at the end part of the connecting screw rod.
The bottom of the steel strand is fixed with the cofferdam through a cofferdam anchoring device.
The cofferdam anchoring device comprises a cofferdam anchoring pressing beam and an anchoring plate connected with the cofferdam anchoring pressing beam through a pin shaft, and the anchoring plate is welded on the cofferdam.
The finish-rolled deformed steel bar is a finish-rolled deformed steel bar with a diameter of 32 mm.
The distribution longitudinal beam is made of 3I56a steel.
The utility model has the beneficial effects based on the technical scheme that:
(1) the support counter-force preloading system suitable for the oversized zero block of the cable-stayed bridge in the water area adopts the feed-through jack for loading and synchronous stress to replace the traditional preloading mode, and overcomes the defects of complex process, high hoisting risk, low work efficiency and the like in the traditional preloading construction;
(2) the support counter-force prepressing system applicable to the oversized zero block of the cable-stayed bridge in the water area utilizes the wall body of the double-wall cofferdam as the anchoring point of the back pressure frame, and solves the problems that the installation of the back pressure frame in the water construction of the large zero block is not firm in anchoring, risks exist in stress and the like;
(3) the bracket counter-force prepressing system suitable for the oversized zero block of the cable-stayed bridge in the water area fixes the bracket in a way of combining the embedded creeping cone and the steel plate, so that the bracket counter-force prepressing system is convenient and accurate to fix, reduces the influence on the appearance of pier concrete, and simultaneously provides convenience for subsequent dismantling.
Drawings
FIG. 1 is a schematic cross-sectional view of a bracket reaction force preloading system suitable for a super-large zero-number block of a cable-stayed bridge in a water area according to the present invention.
Fig. 2 is a top view of the bracket reaction force preloading system suitable for the extra-large zero-block of the water area cable-stayed bridge provided by the utility model.
Fig. 3 is a schematic structural diagram of a steel pipe pile diagonal brace.
Fig. 4 is a schematic view of a cofferdam anchoring structure.
In the figure: 1-steel pipe pile, 2-steel pipe outer diagonal brace, 21-steel pipe inner diagonal brace, 3-counterfort steel pipe, 4-steel pipe connection system, 5-distribution longitudinal beam, 6-bearing cross beam, 6 a-dumping block, 7-lower reaction frame longitudinal beam, 8-reaction frame cross beam, 9-through jack, 10-upper reaction frame longitudinal beam, 11-combined pressing beam, 12-embedded climbing cone embedded part, 121-climbing nut, 122-connecting screw rod, 123-climbing cone embedded part plate, 124-bolt, 13-cofferdam anchoring structure, 131-cofferdam anchoring pressing beam, 132-pin shaft, 133-anchoring plate, 14-finish-rolled deformed steel, 15-steel strand, 16-anchoring rib, 17-bearing platform, and 18-pier body.
Detailed Description
The utility model is further illustrated by the following figures and examples.
The utility model provides a support counter-force pre-pressing system suitable for an oversized zero block of a cable-stayed bridge in a water area, which comprises steel pipe piles 1 distributed on two sides of a pier body, wherein the steel pipe piles are fixed on the side part of the pier body through a group of counterfort steel pipes 3 from top to bottom. The buttress steel pipe is connected with the steel-pipe pile through steel pipe connection system 4 of steel-pipe pile lateral part installation, is connected with the pier shaft through the pre-buried awl built-in fitting 12 that climbs of 18 lateral parts of pier shaft simultaneously, climbs the awl built-in fitting and includes that interconnect climbs awl embedded part board 123 and the tip of connecting lead screw 122 is equipped with and climbs awl nut 121 and bolt 124.
The top of the steel pipe pile is provided with a square hole in the horizontal direction, the distribution longitudinal beam 5 penetrates through the square hole, and a gap between the distribution longitudinal beam and the square hole of the steel pipe pile is plugged through a steel plate.
The bottom of the two ends of the distribution longitudinal beam is respectively connected with the top of the steel pipe outer inclined strut 2 and the top of the steel pipe inner inclined strut 21, the bottom of the steel pipe outer inclined strut and the bottom of the steel pipe inner inclined strut are fixed on the side of the steel pipe pile, a group of bearing cross beams 6 are laid on the distribution longitudinal beam, a group of lower reaction frame longitudinal beams 7 are laid on the bearing cross beams, a group of reaction frame cross beams 8 are laid on the lower reaction frame longitudinal beams, the reaction frame longitudinal beams 10 are laid above the reaction frame cross beams through the center-penetrating jacks 9, the two ends of the reaction frame longitudinal beams are provided with combined pressure beams 11, the combined pressure beams positioned in the range of the pier body are anchored through finish-rolled deformed steel 14 with phi 32 pre-embedded at the top of the pier body, the combined pressure beams positioned at the end of the upper reaction frame longitudinal beams are anchored on the cofferdam through steel stranded wires 15 connected with the cofferdam anchoring device, and the bottom of the steel stranded wires is fixed with the cofferdam anchoring device 13. The cofferdam anchoring device comprises a cofferdam anchoring pressing beam 131 and an anchoring plate 133 connected with the cofferdam anchoring pressing beam through a pin shaft 132, and the anchoring plate is welded on the cofferdam.
The distribution longitudinal beam is made of 3I56a steel.
The counter-force preloading construction process comprises the following steps:
(1) pre-burying a group of steel pipe pile column feet on an un-poured bearing platform 17, arranging anchoring ribs 16 at pre-buried pile heads of the steel pipe pile column feet, pre-burying cone climbing embedded parts at the side parts of a pier body 18, and burying finish rolling screw-thread steel at the top end of the pier body;
(2) after the bearing platform is poured, lengthening a steel pipe pile, installing a steel pipe connecting system on the side part of the steel pipe pile, and after micro-expansion concrete is poured into the steel pipe pile, installing a counterfort steel pipe through a cone climbing embedded part and the steel pipe connecting system;
(3) installing a steel pipe outer inclined strut and a steel pipe inner inclined strut at the upper side part of the steel pipe pile;
(4) a square hole in the horizontal direction is formed in the top of the steel pipe pile, after the distribution longitudinal beam penetrates through the square hole, the top ends of the steel pipe outer inclined strut and the steel pipe inner inclined strut are respectively connected with the bottoms of the two ends of the distribution longitudinal beam in a welding mode;
(5) laying a group of bearing cross beams on the distribution longitudinal beams, arranging a dumping block 6a between the bearing cross beams and the distribution longitudinal beams, and welding and connecting the mutually contacted positions;
(6) laying a group of lower reaction frame longitudinal beams on the bearing cross beam, and then laying a reaction frame cross beam above the lower reaction frame longitudinal beams;
(7) installing a group of feed-through jacks above a cross beam of a reaction frame;
(8) installing a longitudinal beam of an upper counter-force frame above the feed-through jack;
(9) installing a cofferdam anchoring device on the cofferdam as a lower end anchoring point;
(10) installing a group of combined pressing beams on the upper reaction frame longitudinal beam, wherein the combined pressing beams positioned in the range of the pier body are anchored by finish rolling deformed steel bars pre-embedded at the top of the pier body, and the combined pressing beams positioned at the end of the upper reaction frame longitudinal beam are anchored on the cofferdam by steel strands connected with a cofferdam anchoring device;
(11) respectively pre-tensioning the steel strand and the finish-rolled deformed steel bar;
(12) the integral prepressing is carried out through the synchronous tensioning straight-through jack, and the staged prepressing loading is adopted.
The support counter-force prepressing system applicable to the oversized zero-number block of the cable-stayed bridge in the water area provided by the utility model has the advantages of simple installation, convenience and quickness in disassembly, high universality, wide application and safety risk reduction.
Claims (8)
1. The utility model provides a support counter-force pre-compaction system suitable for waters cable-stay bridge super large zero number piece, includes steel-pipe pile (1) of distributing in pier shaft both sides, its characterized in that: the steel pipe pile is fixed on the side part of the pier body through a group of counterfort steel pipes (3) from top to bottom, the top of the steel pipe pile is provided with a horizontal square hole, a distribution longitudinal beam (5) penetrates through the square hole, the bottoms of the two ends of the distribution longitudinal beam are respectively connected with the tops of an outer steel pipe inclined strut (2) and an inner steel pipe inclined strut (21), the bottoms of the outer steel pipe inclined strut and the inner steel pipe inclined strut are fixed on the side part of the steel pipe pile, a group of bearing cross beams (6) are laid on the distribution longitudinal beam, a group of lower reaction frame longitudinal beams (7) are laid on the bearing cross beams, a group of reaction frame cross beams (8) are laid on the lower reaction frame longitudinal beams, reaction frame longitudinal beams (10) are laid above the reaction frame cross beams through a piercing jack (9), combined press beams (11) are installed at the two ends of the reaction frame longitudinal beams, wherein the combined press beams positioned in the range of the pier body are anchored through finish rolling deformed steel screws (14) pre-embedded at the top of the pier body, and the combined pressing beam positioned at the end of the upper reaction frame longitudinal beam is anchored on the cofferdam through a steel strand (15) connected with the cofferdam anchoring device.
2. The bracket counter-force preloading system applicable to the oversized zero-number block of the cable-stayed bridge in the water area of claim 1, which is characterized in that: the buttress steel pipe is connected with the steel pipe pile through a steel pipe connecting system (4) installed on the side part of the steel pipe pile, and is connected with the pier body through a climbing cone embedded part (12) embedded on the side part of the pier body (18).
3. The bracket counter-force preloading system applicable to the oversized zero-number block of the cable-stayed bridge in the water area of claim 1, which is characterized in that: and gaps between the distribution longitudinal beams and the square holes of the steel pipe piles are blocked by steel plates.
4. The bracket counter-force preloading system applicable to the oversized zero-number block of the cable-stayed bridge in the water area of claim 1, which is characterized in that: the climbing cone embedded part comprises a climbing cone embedded part plate (123) and a connecting screw rod (122) which are connected with each other, and a climbing cone nut (121) and a bolt (124) are arranged at the end part of the connecting screw rod.
5. The bracket counter-force preloading system applicable to the ultra-large zero-number block of the cable-stayed bridge in the water area of claim 1, characterized in that: the bottom of the steel strand is fixed with the cofferdam through a cofferdam anchoring device (13).
6. The bracket counter-force preloading system applicable to the ultra-large zero-number block of the cable-stayed bridge in the water area of claim 1, characterized in that: the cofferdam anchoring device comprises a cofferdam anchoring pressing beam (131) and an anchoring plate (133) connected with the cofferdam anchoring pressing beam through a pin shaft (132), and the anchoring plate is welded on the cofferdam.
7. The bracket counter-force preloading system applicable to the oversized zero-number block of the cable-stayed bridge in the water area of claim 1, which is characterized in that: the finish-rolled deformed steel bar is a finish-rolled deformed steel bar with a diameter of 32 mm.
8. The bracket counter-force preloading system applicable to the oversized zero-number block of the cable-stayed bridge in the water area of claim 1, which is characterized in that: the distribution longitudinal beam is made of 3I56a steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123169676.8U CN216892013U (en) | 2021-12-16 | 2021-12-16 | Support counter-force pre-pressing system suitable for water area cable-stayed bridge super-large zero block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123169676.8U CN216892013U (en) | 2021-12-16 | 2021-12-16 | Support counter-force pre-pressing system suitable for water area cable-stayed bridge super-large zero block |
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| CN216892013U true CN216892013U (en) | 2022-07-05 |
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| CN202123169676.8U Active CN216892013U (en) | 2021-12-16 | 2021-12-16 | Support counter-force pre-pressing system suitable for water area cable-stayed bridge super-large zero block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214919A (en) * | 2021-12-16 | 2022-03-22 | 中铁十一局集团有限公司 | Counter-force prepressing construction method and system for oversized zero-block bracket of cable-stayed bridge in water area |
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2021
- 2021-12-16 CN CN202123169676.8U patent/CN216892013U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214919A (en) * | 2021-12-16 | 2022-03-22 | 中铁十一局集团有限公司 | Counter-force prepressing construction method and system for oversized zero-block bracket of cable-stayed bridge in water area |
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