Large-tonnage self-balancing steel-concrete structure pretensioning prestress tension beam

Abstract

The utility model discloses a large tonnage self -balancing steel -concrete structure pre -stressed prestress tension crossbeam belongs to building construction technical field, has solved the problem of the present pre -stressed steel -concrete prestressed steel beam because of the oil cylinder and the jack is bigger, and the steel quantity is high, makes the area of production occupies the ground. The utility model discloses two tensioning plates of opposite setting, two tensioning plate bottom fixed on the bottom plate, two tensioning plate both ends are equipped with side edge reinforcing plate respectively, and the bottom of side edge reinforcing plate is fixedly connected with the bottom plate, and a plurality of tensioning holes corresponding are equipped on two tensioning plates, and tensioning pipe is equipped between the tensioning hole corresponding, and a plurality of ground anchors are equipped on the bottom plate, and the ground anchor is fixed with the pouring pool ground. The utility model discloses simple structure, stable operation can be set up flexibly according to the need of the scene, effectively reduces the original pre -stressed steel -concrete prestressed steel beam production area, improves the performance of steel -concrete prestressed steel beam simultaneously, has very strong popularization.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically relating to a prestressed tensioned crossbeam of a large-tonnage self-balancing steel-concrete structure. Background Technology

[0002] As core load-bearing components of modern bridges, long-span buildings, and industrial plants, prestressed steel-concrete beams leverage the synergistic effect of prestressed steel strands (steel strands or high-strength steel bars) and concrete to fully utilize the high tensile strength of steel and the excellent compressive strength of concrete, significantly improving the structure's crack resistance, stiffness, and load-bearing capacity. Traditional prestressed steel-concrete construction techniques are mainly based on post-tensioning and pre-tensioning methods, relying on manually operated hydraulic jacks to tension the steel strands, combined with grouting processes or mechanical anchoring systems to fix the prestress.

[0003] However, as engineering structures develop towards larger spans and higher loads, the limitations of traditional processes are becoming increasingly apparent. Currently, pre-tensioned steel beams require foundation construction in the tensioning area first, ensuring the tensioning foundation is in place. Then, the prestressing tendons are tensioned using a fixed platform, followed by the pouring of high-performance concrete (UHPC) to fabricate the prestressed steel beam. This process requires relatively thick steel plates to provide support. Therefore, the fabrication of existing pre-tensioned prestressed steel beams occupies a large area, and the construction of the tensioning foundation is time-consuming and labor-intensive, hindering production. Utility Model Content

[0004] This utility model provides a large-tonnage self-balancing steel-concrete prestressed tensioning beam to solve the problems of time-consuming and labor-intensive construction of tensioning foundations, high steel consumption of tensioning steel beams, and large area occupied by the fabrication area in existing prestressed steel-concrete beams.

[0005] The technical solution of this utility model is: a prestressed tensioned crossbeam of a large-tonnage self-balancing steel-concrete structure, comprising two tensioning plates arranged opposite each other, the bottom of the two tensioning plates being fixed to a base plate, and side reinforcing plates being provided at both ends of the two tensioning plates respectively, the bottom of the side reinforcing plates being fixedly connected to the base plate, and a casting cavity being formed between the tensioning plates, the base plate, and the side reinforcing plates; multiple corresponding tensioning holes are provided on the two tensioning plates, and tensioning pipes are provided between the corresponding tensioning holes; multiple ground anchors are provided on the base plate, and the ground anchors are fixed to the ground of the casting pool.

[0006] As a further improvement of this utility model, one of the tensioning plates is provided with multiple supporting reinforcing plates between the tensioning plate and the base plate.

[0007] As a further improvement of this utility model, multiple brackets are detachably installed on another tensioning plate, with the bottom of the brackets abutting against the mold table or the ground.

[0008] As a further improvement of this utility model, the other tensioning plate has detachable limit baffles installed at both ends.

[0009] As a further improvement of this utility model, multiple longitudinal and transverse reinforcing ribs are provided between the two tensioning plates.

[0010] As a further improvement of this utility model, lifting plates are provided on the longitudinal reinforcing ribs at both ends, which are used for transportation and installation after the manufacturing is completed.

[0011] As a further improvement of this utility model, a plurality of shear nails and shear bars are provided on the bottom plate between the two tensioning plates so that the high-performance concrete and the steel plate can be tightly connected.

[0012] As a further improvement of this utility model, ultra-high performance concrete is poured into the casting cavity, and after pouring, a prestressed steel beam is formed by pretensioning.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model replaces the original tension foundation that requires separate construction by using multiple ground anchors and side reinforcing plates. Relying on the ground anchors, sufficient friction and tension are generated between the casting cavity and the ground, which can replace the construction of the tension foundation, reduce construction time and construction cost, realize the self-balancing of the steel-concrete structure, and effectively reduce the area for the fabrication of prestressed steel beams.

[0015] 2. This utility model also strengthens the prestressed steel beam of the steel-concrete composite structure by supporting reinforcing ribs and corbels, continuously providing pressure to both sides of the tensioning plate, which can correspondingly reduce the thickness of the tensioning plate, effectively reducing the amount of steel used, while achieving a large tensioning tonnage. Compared with pure steel beams of the same size, the tensioning tonnage can be increased by at least 1 times, improving mobility and compatibility. The tensioned steel beam can be moved to other production areas through lifting lugs, and has higher compatibility than traditional steel beams that require foundation construction.

[0016] 3. This utility model also relies on multiple longitudinal and transverse reinforcing ribs between the two tensioning plates to prevent the prestressed steel beam from cracking due to excessive stress in a short period of time during tensioning, thus making the prestressed steel beam more robust.

[0017] This utility model has a simple structure, is safe and stable, and can be flexibly set according to the needs of the site. It effectively reduces the fabrication area of ​​the original pre-tensioned steel-concrete prestressed steel beam, while improving the performance of the steel-concrete prestressed steel beam, and has strong applicability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure before casting of this utility model;

[0019] Figure 2 This is a sectional view of the side of the present invention before casting;

[0020] Figure 3 This is a schematic diagram of the structure after casting of this utility model.

[0021] In the diagram: 1. Tensioning plate; 2. Base plate; 3. Tensioning hole; 4. Side reinforcing plate; 5. Corbel; 6. Supporting reinforcing rib; 7. Tensioning tube; 8. Longitudinal reinforcing rib; 9. Transverse reinforcing rib; 10. Shear stud; 13. Limiting baffle; 17. Lifting plate; 18. Ground anchor. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-3 As shown, a prestressed crossbeam of a large-tonnage self-balancing steel-concrete structure includes two tensioning plates 1 arranged opposite each other. The bottom of the two tensioning plates 1 is fixed on the base plate 2. Side reinforcing plates 6 are provided at both ends of the two tensioning plates 1 respectively. The bottom of the side reinforcing plates 6 is fixedly connected to the base plate 2. A casting cavity is formed between the tensioning plates 1, the base plate 2 and the side reinforcing plates 4. The two tensioning plates 1 are provided with a plurality of corresponding tensioning holes 3. Tensioning pipes 7 are provided between the corresponding tensioning holes 3. The base plate 2 is provided with a plurality of ground anchors 18, which are fixed to the ground of the casting pool.

[0024] One of the tensioning plates 1 and the base plate 2 is provided with multiple supporting reinforcing plates 6.

[0025] Multiple brackets 5 are detachably installed on the other tensioning plate 1, with the bottom of the brackets 5 abutting against the mold table or the ground.

[0026] The other tensioning plate 1 has detachable limit baffles 13 installed at both ends.

[0027] Multiple longitudinal reinforcing bars 8 and transverse reinforcing bars 9 are provided between the two tensioning plates 1 to prevent the concrete from breaking as a whole after tensioning.

[0028] Lifting plates 17 are provided on the longitudinal reinforcing ribs 8 at both ends, which are used for transportation and installation after the fabrication is completed.

[0029] Multiple shear studs 10 are provided on the base plate 2 between the two tension plates 1 to ensure a tight connection between the high-performance concrete and the steel plate.

[0030] Ultra-high performance concrete is poured into the casting cavity, which forms a prestressed steel beam after pouring.

[0031] Before use, a crane is used to hoist the tensioned steel beam without ultra-high performance concrete (UHPC) to the work area through two lifting plates 17. Ground anchors 18 are fixed to the ground in the work area, ensuring the base plate 2 is in close contact with the ground and the casting cavity is fixed to the work area. Data is determined around the tensioned steel beam to ensure its position and dimensions are accurate. High-performance concrete (UHPC) is poured into the two tensioning plates 1. After the concrete reaches its design strength, the completed prestressed beam undergoes quality testing to ensure it meets design requirements. After pouring and achieving the required strength, the support bracket 5 is installed onto the prestressed beam. Leveling shims are used to fill the gap between the bracket and the formwork or ground. At this point, the prestressed beam of the steel-concrete structure can be used for prestressing construction. Steel strands are threaded into the tensioning holes 3 and tensioning pipes 7, and the steel strands are tightened using a tensioning machine to tension the steel beam.

Claims

1. A large-tonnage self-balancing steel-concrete structure pre-tensioning prestressed tension beam, characterized in that: It includes two tensioning plates (1) arranged opposite to each other. The bottom of the two tensioning plates (1) is fixed on the base plate (2). Side reinforcing plates (4) are provided on both sides of the two tensioning plates (1). The bottom of the side reinforcing plates (4) is fixedly connected to the base plate (2). A casting cavity is formed between the tensioning plates (1), the base plate (2) and the side reinforcing plates (4). The two tensioning plates (1) are provided with a plurality of corresponding tensioning holes (3). Tensioning pipes (7) are provided between the corresponding tensioning holes (3). The base plate (2) is provided with a plurality of ground anchors (18). The ground anchors (18) are fixed to the ground.

2. The prestressed crossbeam of a large-tonnage self-balancing steel-concrete structure according to claim 1, characterized in that: Multiple supporting reinforcing plates (6) are provided between the tensioning plate (1) and the base plate (2) of one of them.

3. A large-tonnage self-balancing steel-concrete structure prestressed tensioned crossbeam according to claim 1 or 2, characterized in that: Multiple brackets (5) are detachably installed on the tensioning plate (1) of the other one.

4. The prestressed tensioned crossbeam of a large-tonnage self-balancing steel-concrete structure according to claim 3, characterized in that: Limiting baffles (13) can be detachably installed at both ends of the tensioning plate (1) of the other one.

5. A prestressed crossbeam using the pre-tensioning method for a large-tonnage self-balancing steel-concrete structure according to claim 4, characterized in that: Multiple longitudinal reinforcing ribs (8) and transverse reinforcing ribs (9) are provided between the two tension plates (1).

6. A prestressed crossbeam of a large-tonnage self-balancing steel-concrete structure according to claim 5, characterized in that: Multiple shear studs (10) are provided on the bottom plate (2) between the two tension plates (1).

7. A prestressed crossbeam using the pre-tensioning method for a large-tonnage self-balancing steel-concrete structure according to claim 5, characterized in that: Lifting plates (17) are provided on the longitudinal reinforcing ribs (8) at both ends.

8. A prestressed crossbeam of a large-tonnage self-balancing steel-concrete structure according to claim 1, characterized in that: The casting cavity is filled with ultra-high performance concrete.

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