Prefabricated light-weight bent cap structure

Abstract

The utility model relates to the technical field of assembly type cover beams, and particularly discloses a prefabricated assembly light cover beam structure which is characterized in that a hollow cavity is formed in the cover beam structure, a plurality of partition plates are arranged in the hollow cavity at intervals, the cover beam structure comprises a plurality of blocks which are spliced with one another, and shear key structures are arranged on the sections of the blocks; the adjacent blocks are spliced through shear key structures, vertically-through bolt holes are formed in the shear key structures, fixing screws are arranged in the bolt holes, the adjacent blocks are connected and fixed through the fixing screws after being spliced, a plurality of pre-embedded sleeves are arranged in the cover beam structure and penetrate through the blocks, prestressed tendons are arranged in the pre-embedded sleeves, and the pre-embedded sleeves are fixedly connected with the cover beam structure. Therefore, the capping beam structure is prefabricated in blocks, a large amount of field operation can be transferred to a factory environment, and the stability of construction quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of assembled bent cap, and specifically discloses a prefabricated assembled lightened bent cap structure. BACKGROUND

[0002] With the rapid development of modern traffic construction, the number of bridge projects is increasing, and higher requirements are put forward for the quality, efficiency and economy of bridge construction. In bridge structure, the bent cap is an important load-bearing component, and its design and construction method directly affect the overall performance of the bridge. Traditional bent cap construction mostly adopts the on-site pouring method, which has problems such as long construction period, complex on-site operation environment, and great difficulty in quality control. The successful application of prefabricated assembly technology in the construction industry brings new ideas to bridge engineering. The prefabricated assembly technology can be used in bridge construction to transfer a large amount of on-site operation to the factory environment, which is beneficial to improve the stability of construction quality, reduce the impact of on-site construction on the surrounding environment, and speed up the construction progress. Some common bent caps use corrugated steel web bent caps, which can reduce weight while causing relatively low overall stiffness, making it difficult to meet the requirements of some bridge projects with high structural stiffness requirements. Under the action of long-term load, large deformation is easily generated, which affects the normal use and safety of the bridge. Some wet connection methods require on-site pouring and curing of concrete, which increases the construction time and cost, and has high technical requirements for construction personnel. SUMMARY

[0003] The utility model aims at providing a prefabricated assembled lightened bent cap structure to solve the technical problems mentioned in the background.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A prefabricated assembled lightened bent cap structure is provided, which comprises a hollow chamber inside the bent cap structure, a plurality of partitions are arranged in the hollow chamber, the bent cap structure comprises a plurality of blocks that are spliced with each other, the cross section of the block is provided with a shear key structure, the adjacent blocks are spliced through the shear key structure, a vertical through bolt hole is arranged on the shear key structure, a fixing screw rod is arranged in the bolt hole, and the adjacent blocks are connected and fixed through the fixing screw rod after splicing.

[0006] Further, the plurality of blocks are sequentially connected first block, second block and third block, the hollow chamber includes a first cavity in the first block, a second cavity in the second block and two third cavities, and a fourth cavity in the third block, the first block is a wedge-shaped structure, the first cavity is a wedge-shaped structure, the thick end of the first cavity is through the thick end face of the first block, the second block is a strip-shaped block structure, the second cavity is in the middle of the second block, the two third cavities are respectively arranged on both sides of the second cavity, the second cavity is a closed structure, the partition is arranged between the second cavity and the third cavity, and the two third cavities are respectively through the end faces of the second block at both ends.

[0007] Further, a plurality of the embedded sleeves are arranged through the first block, the second block and the third block.

[0008] Further, the thick end of the first cavity and the thin end of the first cavity are arranged in the same direction as the thick end of the first block and the thin end of the first block.

[0009] Further, the two end faces of the second block are of the same size, and the two end faces of the second block are smaller than the middle abdominal section of the second block.

[0010] Further, the length of the first block is smaller than the length of the second block.

[0011] Further, the connecting ends of the first block, the third block and the second block are provided with connecting glue.

[0012] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0013] The utility model discloses a cover beam structure is divided into blocks prefabricated, can remove a large number of on -the -spot operation to the factory environment, is favorable for improving the stability of construction quality, reducing the influence of on -the -spot construction to the surrounding environment, speeds up construction progress, through setting up hollow chamber in cover beam structure respectively, and using the baffle to strengthen at the key position, along the longitudinal direction of cover beam is not the maximum value at shearing force and bending moment and does block processing, under the premise of guaranteeing the strength, rigidity and stability of cover beam structure, the self -weight of cover beam is reduced to the maximum extent, improves the transportation and installation efficiency of cover beam, reduces the construction cost, improves the durability and service life of cover beam simultaneously, to satisfy the demand of modern bridge construction, through setting up shear key structure at each block connecting end face, and combining connecting glue, fixed screw rod and prestressed tendon etc. Variety of connecting mode connects it as a whole, when bearing load, can more effectively transfer force, reduces the relative displacement between each block, guarantees the connecting strength and stability between prefabricated component, makes the whole cover beam can work like a whole structure under the complex load condition, has safe, applicable etc. Characteristics, has good popularization and practical value, and after the extensive popularization and application, good economic benefits will be produced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the perspective structure schematic diagram of the utility model.

[0015] Sign: 1, first block;2, second block;3, third block;4, prestressed tendon;5, first cavity;6, second cavity;7, third cavity;8, fourth cavity;9, baffle. DETAILED DESCRIPTION

[0016] In order to make the technical means, innovative features, purposes and effects of the utility model easy to understand, the utility model is further explained as follows.

[0017] The embodiment described herein is a specific embodiment of the utility model, for explaining the concept of the utility model, and is explanatory and exemplary, and should not be interpreted as limiting the embodiments and scope of the utility model. In addition to the embodiments described herein, those skilled in the art can also use other obvious technical solutions based on the disclosure of the claims and description of the present application, which include any obvious replacement and modification of the embodiments described herein.

[0018] The utility model discloses a prefabricated assembly light -duty cover beam structure, like Figure 1As shown, the cap beam structure is in a strip shape as a whole, and a hollow chamber is arranged inside the cap beam structure. A plurality of partitions 9 are arranged in the hollow chamber to locally enhance the structural strength of the cap beam structure. The cap beam structure comprises a plurality of blocks which are spliced with each other. The cross section of the blocks is provided with a shear key structure. The adjacent blocks are spliced through the shear key structure. The shear key structure is a plurality of groups of protrusions and grooves which are arranged at intervals. The adjacent blocks are provided with connecting glue at the splicing position. The shear key structure is provided with vertically penetrating bolt holes. The bolt holes are provided with fixing screws. The adjacent blocks are fixed through the fixing screws and the connecting glue after splicing. A plurality of embedded sleeves are arranged in the cap beam structure. The embedded sleeves penetrate through the plurality of blocks. The embedded sleeves are provided with prestressed tendons 4.

[0019] Specifically, the plurality of blocks are a first block 1, a second block 2 and a third block 3 which are sequentially connected. The plurality of prestressed tendons 4 penetrate through the first block 1, the second block 2 and the third block 3. The first block 1 is in a wedge-like structure. The first block 1 comprises a thick end close to one end of the second block 2 and a thin end away from the one end of the second block 2. The hollow chamber comprises a first cavity 5 arranged in the first block 1, a second cavity 6 and two third cavities 7 arranged in the second block 2, and a fourth cavity 8 arranged in the third block 3. The first cavity 5 is in a wedge-like structure. The thick end of the first cavity 5 and the thick end of the first block 1 are arranged in the same direction. The thick end of the first cavity 5 penetrates through the thick end face of the first block 1. The second block 2 is in a strip block structure with an arc-shaped bottom surface. The two end faces of the second block 2 are of the same size. The two end faces of the second block 2 are smaller than the middle section of the second block 2. The second cavity 6 is arranged in the middle of the second block 2. The two third cavities 7 are arranged on the two sides of the second cavity 6. The second cavity 6 is in a closed structure. The partitions 9 are arranged between the second cavity 6 and the third cavities 7. The length of the second cavity 6 is twice the length of the third cavities 7. The ends of the two third cavities 7 away from the second cavity 6 penetrate through the two end faces of the second block 2. The third block 3 is the same as the first block 1. The first block 1 and the third block 3 are symmetrically arranged at the two ends of the second block 2. The length of the first block 1 is smaller than the length of the second block 2. The fourth cavity 8 is the same as the first cavity 5. The thick end of the fourth cavity 8 penetrates through the thick end face of the third block 3. The shear key structure is arranged at the thick end face of the first block 1, the thick end face of the third block 3 and the two end faces of the second block 2. The thick end of the first block 1 and the thick end of the third block 3 are spliced with the two end faces of the second block 2 through the shear key structure. The connecting glue is arranged at the connecting end between the first block 1, the third block 3 and the second block 2. The plurality of embedded sleeves penetrate through the first block 1, the second block 2 and the third block 3.

[0020] During manufacturing, a template corresponding to each sub-block is manufactured according to a design drawing, and each sub-block is cast in a precast site while embedding a pre-embedded sleeve; a vertical through bolt hole is formed at a position of a shear key structure of each sub-block, adjacent sub-blocks are spliced through the shear key structure, connecting glue is applied at a splicing position of adjacent sub-blocks, and a fixed screw is inserted into the bolt hole to strengthen and fix the adjacent sub-blocks after the adjacent sub-blocks are spliced; after the splicing is completed, a prestressed tendon 4 is inserted into the pre-embedded sleeve and tensioned.

[0021] The utility model discloses a cover beam structure, which is divided into sub-blocks for prefabrication, and a large amount of on-site work can be transferred to a factory environment, which is conducive to improving the stability of construction quality, reducing the influence of on-site construction on the surrounding environment, and accelerating the construction progress. Hollow chambers are arranged in the cover beam structure, and a baffle is arranged at a key position for reinforcement. The cover beam is divided into sub-blocks at positions where the shear and bending moment are not maximum values along the longitudinal direction of the cover beam. Under the premise of ensuring the strength, rigidity and stability of the cover beam structure, the self-weight of the cover beam is reduced to the maximum extent, the transportation and installation efficiency of the cover beam is improved, the construction cost is reduced, the durability and service life of the cover beam are improved, and the needs of modern bridge construction are met. The cover beam is connected as a whole through a shear key structure arranged at the connecting end face of each sub-block and combined with a connecting glue, a fixed screw and a prestressed tendon. When bearing a load, the cover beam can effectively transfer force and reduce the relative displacement between the sub-blocks, thereby ensuring the connection strength and stability between the prefabricated components.

[0022] The above description is only a preferred embodiment of the utility model, and is not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A prefabricated lightweight cap beam structure, characterized in that: The cap beam structure has a hollow cavity inside, with multiple partitions spaced apart inside the hollow cavity. The cap beam structure includes multiple segments that are spliced ​​together. The cross-section of each segment has a shear key structure. Adjacent segments are spliced ​​together by the shear key structure. The shear key structure has vertically penetrating bolt holes, and fixing screws are installed in the bolt holes. After adjacent segments are spliced ​​together, they are connected and fixed by fixing screws. The cap beam structure has multiple embedded sleeves that penetrate multiple segments. The embedded sleeves have prestressed tendons (4) inside. The connection ends between multiple segments are all provided with connecting adhesive.

2. A prefabricated lightweight cap beam structure, characterized in that: The multiple segments are a first segment (1), a second segment (2), and a third segment (3) connected in sequence. The hollow chamber includes a first cavity (5) inside the first segment (1), a second cavity (6) and two third cavities (7) inside the second segment (2), and a fourth cavity (8) inside the third segment (3). The first segment (1) has a wedge-shaped structure, and the first cavity (5) has a wedge-shaped structure. The thick end of the first cavity (5) is connected to the thick end face of the first segment (1). The second segment (2) has a strip-shaped block structure. The second cavity (6) is located in the middle of the second segment (2), and the two third cavities (7) are respectively located on both sides of the second cavity (6). The second cavity (6) has a closed structure with a partition. (9) Located between the second cavity (6) and the third cavity (7), the ends of the two third cavities (7) away from the second cavity (6) are respectively connected to the end faces of the two ends of the second block (2). The third block (3) and the first block (1) have the same structure. The first block (1) and the third block (3) are symmetrically located at both ends of the second block (2). The fourth cavity (8) has the same structure as the first cavity (5). The thick end of the fourth cavity (8) is connected to the thick end face of the third block (3). The shear key structure is located at the thick end face of the first block (1), the thick end face of the third block (3), and the end faces of the two ends of the second block (2). The thick end of the first block (1) and the thick end of the third block (3) are respectively spliced ​​to the ends of the two ends of the second block (2) through the shear key structure.

3. The prefabricated lightweight cap beam structure according to claim 2, characterized in that: Multiple pre-embedded sleeves are installed through the first block (1), the second block (2), and the third block (3).

4. The prefabricated lightweight cap beam structure according to claim 3, characterized in that: The coarse end and the fine end of the first cavity (5) are respectively aligned with the coarse end and the fine end of the first block (1).

5. A prefabricated lightweight cap beam structure according to claim 2, characterized in that: The two end faces of the second segment (2) have the same specifications, and both end faces of the second segment (2) are smaller than the middle abdominal cross section of the second segment (2).

6. A prefabricated lightweight cap beam structure according to claim 5, characterized in that: The length of the first block (1) is less than the length of the second block (2).

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