A steel pipe concrete anchoring steel wire rope connection structure for a wet joint

Abstract

This invention relates to a steel-concrete composite pipe anchorage wire rope connection structure for wet joints, belonging to the field of bridge engineering technology. It includes a precast concrete bridge deck, a wet joint, wire ropes, and a steel-concrete composite pipe. Adjacent precast concrete bridge decks are connected via wet joints, with concrete poured within the joints. The wire ropes within the precast concrete bridge decks are tied and fixed to transverse reinforcing bars, and are anchored to the transverse reinforcing bars at the middle or end of the precast concrete bridge deck via wire rope locks. The wire ropes extending from the precast concrete bridge decks are anchored and tightened through the steel-concrete composite pipe. This invention features a clear force transmission path, convenient on-site assembly, and easy factory production. It has the characteristics of small on-site pouring volume, fast construction speed, and good stress performance. It can fully utilize the advantages of high tensile strength and good flexibility of wire ropes, accelerate construction progress, and significantly shorten the bridge construction cycle.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, specifically to a steel pipe concrete anchoring wire rope connection structure for wet joints. Background Technology

[0002] To minimize the impact on existing traffic and the environment, achieve rapid bridge construction and integrated assembly, and promote the formation of a modern, high-quality national comprehensive three-dimensional transportation network, precast concrete bridge decks have become a focus of attention in academia and engineering. Due to their numerous advantages, such as fast construction speed, high component quality, and minimal traffic impact, precast concrete bridge decks are increasingly used in bridge engineering. The joints between precast bridge decks, as the main component connecting adjacent precast bridge decks, are often considered the most important part of the entire structure.

[0003] Currently, wet joints between adjacent precast bridge decks are typically connected with reinforcing steel bars. However, in actual engineering projects, due to the width of the wet joints and the joint connection structure, on-site assembly and alignment are inconvenient, easily leading to steel bar interference. To reduce the width of wet joints and facilitate on-site construction, researchers have proposed a new joint connection method using steel wire ropes instead of reinforcing steel bars. However, using transverse reinforcing steel bars or stirrups to restrain the steel wire ropes and prevent concrete pull-out is ineffective. This often results in the pull-out of the core concrete restrained by the steel wire rope and sudden breakage of the steel wire rope. Therefore, the anchorage problem of the steel wire rope greatly limits the advantage of its high tensile strength, becoming a major obstacle to the adoption of steel wire ropes as a connection method for wet joints.

[0004] How to provide a steel pipe concrete anchoring wire rope connection structure for wet joints has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a steel pipe concrete anchoring wire rope connection structure for wet joints, which solves the problems of inconvenience in traditional rebar lap splicing construction and stress concentration and premature yielding of wire ropes that easily occur when anchoring rebars with wire ropes. It is suitable for the connection of precast concrete bridge decks with narrow wet joints.

[0006] To achieve the above objectives, the present invention provides a steel pipe concrete anchoring wire rope connection structure for wet joints, comprising: a precast concrete bridge deck, a wet joint, a wire rope, and a steel pipe concrete; adjacent precast concrete bridge decks are connected by a wet joint, and concrete is poured into the wet joint; the wire rope inside the precast concrete bridge deck is tied and fixed to the transverse reinforcement, and is bent and anchored to the transverse reinforcement at the middle or end of the precast concrete bridge deck by a wire rope lock; the wire rope extending from the precast concrete bridge deck is anchored and tightened by the steel pipe concrete.

[0007] Furthermore, the method for anchoring and tightening the wire ropes through steel pipe concrete is as follows: steel pipe concrete is horizontally inserted between the wire ropes extending from the precast concrete bridge deck; adjacent precast concrete bridge decks are anchored and tightened by means of pins.

[0008] Furthermore, the wire ropes are arranged in a ring, and the inner diameter of the wire ropes extending from the precast concrete bridge deck is equal to the outer diameter of the steel-concrete composite pipe.

[0009] Furthermore, in the factory preparation of precast concrete bridge deck (1), the bending and anchoring of the steel wire ropes are positioned using steel pipe concrete as a template during the factory precast concrete bridge deck preparation, to ensure the consistency of the length of the steel wire ropes extending from the precast concrete bridge deck.

[0010] Furthermore, the steel-concrete composite pipe is prefabricated in the factory, and the appropriate thickness of the steel pipe is determined according to the diameter of the steel wire rope to ensure sufficient strength and rigidity.

[0011] Furthermore, after the precast concrete bridge deck is assembled and positioned on site, ensure that the lap length of the wire rope in the wet joint area is greater than the diameter of the steel pipe concrete to facilitate the on-site installation of the steel pipe concrete.

[0012] Furthermore, part of the wire rope is bent and anchored to the transverse reinforcement in the middle of the precast concrete bridge deck through wire rope locks, and the other part is bent and anchored to the transverse reinforcement at the end of the precast concrete bridge deck through wire rope locks.

[0013] Furthermore, the diameter of the wire rope is equal to the diameter of the longitudinal reinforcing bars in the precast concrete bridge deck.

[0014] Furthermore, the steps for preparing precast concrete bridge decks and steel-concrete composite structures in a factory are as follows:

[0015] Tie the longitudinal and transverse steel bars inside the precast concrete bridge deck, and fabricate and install the precast concrete bridge deck formwork;

[0016] The steel pipe concrete was hoisted into place, and the positions of the precast concrete bridge deck formwork and the steel pipe concrete were adjusted to achieve the design target position.

[0017] Arrange steel wire ropes inside the precast concrete bridge deck on both sides, wrap the steel wire ropes around the steel pipe concrete, and lap and fix them with the upper and lower transverse steel bars inside the precast concrete bridge deck. Finally, use steel wire rope locks to anchor and lock the steel wire ropes to the transverse steel bars in the middle or end of the precast concrete bridge deck.

[0018] The concrete used for pouring precast concrete bridge decks;

[0019] After the concrete has cured, the formwork of the precast concrete bridge deck is removed, and the steel-concrete composite structure is taken out.

[0020] Furthermore, the steps for on-site pouring of wet joints in precast concrete bridge decks are as follows:

[0021] The precast concrete bridge deck was hoisted into place, the left precast concrete bridge deck was fixed, and the lap length of the wire rope in the wet joint area was adjusted so that the lap length of the wire rope was greater than the diameter of the steel pipe concrete.

[0022] Steel pipe concrete is inserted into the wet joint area of ​​the adjacent precast concrete bridge deck, and the right precast concrete bridge deck is pushed up so that the steel wire rope is tightly bound to the steel pipe concrete, thus achieving pre-tensioning of the steel wire rope; then the right precast concrete bridge deck is fixed.

[0023] Pour concrete in the wet joint area.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The present invention provides a steel pipe concrete anchoring wire rope wet connection structure for wet joints. By inserting steel pipe concrete into the wire rope lap area, the steel wire rope extending from the precast concrete bridge deck is anchored, which improves the problem of stress concentration in the wire rope caused by steel reinforcement anchoring, effectively avoids premature breakage of the wire rope, can give full play to the excellent tensile mechanical properties of the wire rope, and ensures effective load transfer.

[0026] 2. The present invention provides a steel pipe concrete anchoring wire rope wet connection structure for wet joints, which solves the problem of easy "interlocking" of steel bar lap splices in traditional wet joints by utilizing the flexibility of the wire rope, and facilitates the assembly of precast concrete bridge decks on the construction site.

[0027] 3. The present invention provides a steel pipe concrete anchoring wire rope wet connection structure for wet joints, which is suitable for connecting precast concrete bridge decks with narrow wet joint widths. Its on-site operation is simple and can shorten the construction period of the bridge superstructure. Attached Figure Description

[0028] Figure 1 This is a side view of a steel pipe concrete anchoring wire rope connection structure used for wet joints.

[0029] Figure 2 This is a top view of a steel pipe concrete anchoring wire rope connection structure used for wet joints.

[0030] Figure 3 This is a side view of concrete-filled steel tubing.

[0031] Figure 4 This is an AA cross-sectional view of a steel pipe concrete anchor wire rope connection structure used for wet joints.

[0032] Figure 5This is an assembly flowchart for a steel pipe concrete anchor wire rope connection structure used in wet joints.

[0033] In the diagram: 1-Precast concrete bridge deck; 2-Wet joint; 3-Wire rope; 4-Steel pipe concrete; 5-Transverse reinforcement; 6-Wire rope lock; 7-Longitudinal reinforcement. Detailed Implementation

[0034] To achieve the above objectives and effects, the technical means and structure adopted by the present invention will be described in detail with reference to the accompanying drawings, focusing on the features and functions of the preferred embodiments of the present invention.

[0035] This invention uses steel-concrete composite pipe to replace transverse steel bars or stirrups, which can evenly distribute the stress of the wire rope, effectively avoid stress concentration in the wire rope, prevent premature breakage of the wire rope, give full play to the excellent tensile properties of the wire rope, ensure the effective transfer of load between adjacent precast concrete bridge decks, and accelerate the bridge construction speed.

[0036] like Figure 1-5 As shown, the purpose of this invention is to provide a steel pipe concrete anchoring wire rope connection structure for wet joints, including a precast concrete bridge deck 1, a wet joint 2, a wire rope 3, and a steel pipe concrete 4; adjacent precast concrete bridge decks 1 are connected by the wet joint 2; ordinary concrete or ultra-high performance concrete is poured into the wet joint 2; the wire rope 3 in the precast concrete bridge deck 1 is tied and fixed to the transverse reinforcing bar 5, and is bent and anchored to the transverse reinforcing bar 5 in the middle or end of the precast concrete bridge deck 1 by a wire rope lock 6; the wire rope 3 extending out of the precast concrete bridge deck 1 is anchored and tightened by the steel pipe concrete 4.

[0037] The steel-concrete composite anchoring wire rope connection structure is as follows: the steel-concrete composite 4 is horizontally inserted between the wire ropes 3 extending from the precast concrete bridge deck 1; the adjacent precast concrete bridge decks 1 are anchored and tightened by means similar to pins.

[0038] In this embodiment, the wire rope 3 is arranged in a ring, which makes full use of the easy deformation of the wire rope 3 and helps to speed up the construction. The steel pipe concrete 4 has a restraining effect on the wire rope 3 that extends out of the precast concrete bridge deck 1, ensuring the uniformity of the force on the wire rope 3 and avoiding stress concentration in the wire rope 3.

[0039] In this embodiment, the inner diameter of the steel wire rope 3 extending from the precast concrete bridge deck 1 should be equal to the outer diameter of the steel pipe concrete 4.

[0040] In this embodiment, the precast concrete bridge deck 1 is prepared in the factory. The bending and anchoring of the steel wire rope 3 should be positioned using the steel pipe concrete 4 as a template when the precast concrete bridge deck 1 is prepared in the factory, so as to ensure the consistency of the length of the steel wire rope 3 extending out of the precast concrete bridge deck 1.

[0041] In this embodiment, after the precast concrete bridge deck 1 is assembled and positioned on site, the overlap length of the wire rope 3 in the wet joint area is ensured to be greater than the diameter of the steel pipe concrete 4, so as to facilitate the on-site installation of the steel pipe concrete 4.

[0042] In this embodiment, the steel-concrete composite pipe 4 can be prefabricated in the factory, and the appropriate steel pipe thickness is determined according to the diameter of the wire rope 3 to ensure sufficient strength and rigidity.

[0043] In this embodiment, the wire rope 3 can be partially bent and anchored to the transverse reinforcing bar 5 in the middle of the precast concrete bridge deck 1 through the wire rope lock 6, and partially bent and anchored to the transverse reinforcing bar 5 at the end of the precast concrete bridge deck 1 through the wire rope lock 6.

[0044] In this embodiment, the diameter of the wire rope 3 is equal to the diameter of the longitudinal reinforcing bar 7 in the precast concrete bridge deck 1.

[0045] In this embodiment, the steps for preparing the precast concrete bridge deck 1 and the steel-concrete composite tube 4 in the factory are as follows:

[0046] Tie the longitudinal steel bars 7 and transverse steel bars 5 inside the precast concrete bridge deck 1, and fabricate and install the template for the precast concrete bridge deck 1;

[0047] The steel pipe concrete 4 was hoisted into place, and the positions of the precast concrete bridge deck 1 formwork and the steel pipe concrete 4 were adjusted to achieve the design target position.

[0048] Arrange steel wire ropes 3 inside the precast concrete bridge deck 1 on both sides, so that the steel wire ropes 3 are wrapped around the steel pipe concrete 4 and lapped and fixed with the upper and lower transverse steel bars 5 inside the precast concrete bridge deck 1. Finally, use steel wire rope locks 6 to anchor and lock the steel wire ropes 3 to the transverse steel bars 5 in the middle or end of the precast concrete bridge deck 1.

[0049] Pour concrete for the precast concrete bridge deck 1;

[0050] After the concrete curing is completed, the formwork of the precast concrete bridge deck 1 is removed, and the steel pipe concrete 4 is removed.

[0051] In this embodiment, the method for on-site pouring of the wet joint 2 of the precast concrete bridge deck 1 is as follows:

[0052] The precast concrete bridge deck 1 is hoisted into place, the left precast concrete bridge deck 1 is fixed, and the overlap length of the steel wire rope 3 in the wet joint area is adjusted so that the overlap length of the steel wire rope 3 is greater than the diameter of the steel pipe concrete 4.

[0053] A steel pipe concrete 4 is inserted into the wet joint 2 area of ​​the adjacent precast concrete bridge deck 1, and the right precast concrete bridge deck 1 is pushed up, so that the steel wire rope 3 tightly binds the steel pipe concrete 4, thus achieving pre-tensioning of the steel wire rope 3. Then the right precast concrete bridge deck 1 is fixed.

[0054] Pour ordinary concrete or ultra-high performance concrete in the wet joint area 2.

[0055] This invention provides a steel-concrete composite anchorage wire rope wet connection structure for wet joints. By inserting steel-concrete composite into the wire rope lap area, the wire rope extending from the precast concrete bridge deck is anchored, improving the stress concentration problem caused by rebar anchorage, effectively preventing premature wire rope breakage, and fully utilizing the excellent tensile mechanical properties of the wire rope to ensure effective load transfer. The flexibility of the wire rope solves the problem of easy "interlocking" in traditional wet joint rebar laps, facilitating on-site assembly of precast concrete bridge decks. This invention is suitable for connecting precast concrete bridge decks with narrow wet joints, and its on-site operation is simple, shortening the construction period of the bridge superstructure.

[0056] This invention addresses the inconvenience of traditional rebar lap splicing construction and the problems of stress concentration and premature yielding of steel wire ropes during rebar anchoring. This invention features a clear force transmission path, convenient on-site assembly, and easy factory production. It is characterized by small on-site pouring volume, fast construction speed, and excellent load-bearing performance. It fully utilizes the high tensile strength and flexibility of steel wire ropes, accelerating construction progress and significantly shortening the bridge construction cycle.

[0057] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A steel pipe concrete anchoring wire rope connection structure for wet joints, characterized in that, include: Precast concrete bridge deck (1), wet joint (2), wire rope (3) and steel pipe concrete (4); adjacent precast concrete bridge decks (1) are connected by wet joint (2), and concrete is poured in the wet joint (2); the wire rope (3) in the precast concrete bridge deck (1) is tied and fixed to the transverse reinforcement (5), and is bent and anchored to the transverse reinforcement (5) in the middle or end of the precast concrete bridge deck (1) by wire rope lock (6); the wire rope (3) extending out of the precast concrete bridge deck (1) is anchored and tightened by steel pipe concrete (4); The method of anchoring and tightening the steel wire rope (3) through the steel pipe concrete (4) is as follows: the steel pipe concrete (4) is inserted horizontally between the steel wire rope (3) extending out of the precast concrete bridge deck (1); the steel wire rope (3) is anchored and tightened by the adjacent precast concrete bridge deck (1) through the means of pins. The wire rope (3) is arranged in a ring shape. The inner diameter of the wire rope (3) extending out of the precast concrete bridge deck (1) is equal to the outer diameter of the steel pipe concrete (4). One part of the wire rope (3) is bent and anchored to the transverse steel bar (5) in the middle of the precast concrete bridge deck (1) through the wire rope lock (6), and the other part is bent and anchored to the transverse steel bar (5) at the end of the precast concrete bridge deck (1) through the wire rope lock (6). The diameter of the wire rope (3) is equal to the diameter of the longitudinal steel bar (7) in the precast concrete bridge deck (1).

2. The steel pipe concrete anchoring wire rope connection structure for wet joints as described in claim 1, characterized in that, In the factory, the precast concrete bridge deck (1) is prepared. The bending and anchoring of the steel wire rope (3) are positioned using steel pipe concrete (4) as a template when the precast concrete bridge deck (1) is prepared in the factory, so as to ensure the consistency of the length of the steel wire rope (3) extending out of the precast concrete bridge deck (1).

3. A steel pipe concrete anchoring wire rope connection structure for wet joints as described in claim 1, characterized in that, The steel-concrete composite (4) is prefabricated in the factory, and the appropriate steel pipe thickness is determined according to the diameter of the wire rope (3) to ensure sufficient strength and rigidity.

4. A steel pipe concrete anchoring wire rope connection structure for wet joints as described in claim 1, characterized in that, After the precast concrete bridge deck (1) is assembled and positioned on site, ensure that the overlap length of the wire rope (3) in the wet joint (2) area is greater than the diameter of the steel pipe concrete (4) to facilitate the on-site installation of the steel pipe concrete (4).

5. A steel pipe concrete anchoring wire rope connection structure for wet joints as described in claim 4, characterized in that, The steps for preparing precast concrete bridge deck (1) and steel-concrete composite (4) in a factory are as follows: Tie the longitudinal steel bars (7) and transverse steel bars (5) inside the precast concrete bridge deck (1), and make and install the template for the precast concrete bridge deck (1); The steel pipe concrete (4) was hoisted into place, and the positions of the precast concrete bridge deck (1) formwork and the steel pipe concrete (4) were adjusted to reach the design target position. Arrange steel wire ropes (3) inside the precast concrete bridge deck (1) on both sides, so that the steel wire ropes (3) are wrapped around the steel pipe concrete (4) and lapped and fixed with the upper and lower transverse steel bars (5) inside the precast concrete bridge deck (1). Finally, steel wire rope locks (6) are used to anchor and lock the steel wire ropes (3) to the transverse steel bars (5) in the middle or end of the precast concrete bridge deck (1). The concrete for the precast concrete bridge deck (1) is poured; After the concrete curing is completed, the formwork of the precast concrete bridge deck (1) is removed and the steel pipe concrete (4) is removed.

6. A steel pipe concrete anchoring wire rope connection structure for wet joints as described in claim 4, characterized in that, The steps for on-site pouring of wet joints (2) of precast concrete bridge deck (1) are as follows: Hoist the precast concrete bridge deck (1) into place, fix the left precast concrete bridge deck (1), and adjust the lap length of the wire rope (3) in the wet joint (2) area so that the lap length of the wire rope (3) is greater than the diameter of the steel pipe concrete (4). Insert steel pipe concrete (4) into the wet joint (2) area of ​​the adjacent precast concrete bridge deck (1), push the right precast concrete bridge deck (1) so that the steel wire rope (3) tightly binds the steel pipe concrete (4) and achieves the pre-tensioning of the steel wire rope (3); then fix the right precast concrete bridge deck (1). Pour concrete in the wet joint (2) area.

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