Support device for bridge bent cap prestress tension construction
By designing a support device that includes a cap beam, embedded steel bars, support columns, and cantilever beams, the problem of difficult jack lifting during the prestressing tensioning of bridge cap beams was solved, achieving safe and efficient prestressing tensioning operations, and is suitable for the construction of large-size cap beams.
Patent Information
- Application Number
- CN202423179834.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing technologies, there is a lack of jack lifting devices during the prestressing tensioning construction of bridge cap beams. This is especially problematic in the construction of large-size cap beams, where there are risks associated with working at heights and difficulties in moving the heavy jacks.
A support device was designed, comprising a cap beam, embedded steel bars, a tensioning section, support columns, cantilever beams, and reinforcing ribs. The prestressing tensioning operation is achieved by connecting the embedded steel bars to the connecting steel plates and using a hand-operated hoist to lift the jacks. The support columns and cantilever beams are fixed by welding. The cantilever beams are provided with reserved holes and connected to transverse steel bars. The support frame is fixed to the bridge pier.
It improves the convenience of prestressing tensioning of large-size bridge cap beams, reduces safety risks, has a simple structure, is easy to assemble and construct, and is suitable for prestressing tensioning operations of large-size cap beams.
Smart Images
Figure CN223562032U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bridge bent cap construction detection technical field, more specifically, the utility model relates to a kind of support device for bridge bent cap prestressed tension construction. BACKGROUND
[0002] According to incomplete statistics, there are about 740,000 bridges in China at present, and the bridge stock is large. In order to meet the rapid growth of traffic volume, the number of lanes is increasing and the width of the bridge is increasing in bridge construction. It is particularly obvious in municipal bridges. At present, in order to alleviate traffic congestion, a large number of viaducts are built in major cities. It not only meets the rapid passage of small cars and other vehicles, but also ensures the driving of special vehicles such as trucks under the bridge. Therefore, column piers + large size bent caps are widely used in municipal bridges. The combination of column piers + large size bent caps can meet the width requirement of the upper bridge span and save the lower space. The structure type is stable and safe in stress, and becomes the optimization choice of municipal bridge three-dimensional parallel traffic and expressway.
[0003] At present, the combination of conventional column piers + large size bent caps is mostly constructed by using support method. After the large size bent cap concrete is poured, prestressed tension operation is needed on the support. The support platform built on site generally has small space, no lifting jack device, and is in high-altitude operation, so the construction risk is large. Therefore, a support device is used to solve this problem. UTILITY MODEL CONTENT
[0004] The technical problem to be solved by the utility model is to provide a support device for bridge bent cap prestressed tension construction. The support device is suitable for the lack of bent cap prestressed tension jack lifting device, and is especially suitable for the prestressed tension operation of large size and large cantilever bent cap.
[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that
[0006] A support device for bridge bent cap prestressed tension construction, comprising a bent cap, a pre-buried steel bar and a tension part. The tension part is arranged on both sides of the bent cap. The bent cap is provided with a pre-buried hole at both ends. A connecting steel plate is arranged at the top of the pre-buried hole. The pre-buried steel bar penetrates through the connecting steel plate and enters the pre-buried hole. The tension part is connected with the pre-buried steel bar through the connecting steel plate. The tension part comprises a support column and a cantilever beam. An "8" shaped hoisting connecting piece is arranged in the middle of the cantilever beam. A hand-operated hoist is connected to the bottom of the "8" shaped hoisting connecting piece. The hand-operated hoist is connected with a jack, and is used to lift the position of the jack.
[0007] The utility model discloses a support device for bridge bent cap prestressed tension construction, and a reinforcing rib is arranged between the support column and the cantilever beam.
[0008] The utility model discloses a support device for bridge bent cap prestress tensioning construction, and the support column, the cantilever beam and the reinforcing rib are all fixed by welding between each other, the cantilever beam is equipped with the reserved hole, and the two reserved holes are connected through the transverse steel bar.
[0009] The utility model discloses a support device for bridge bent cap prestress tensioning construction, and the bent cap bottom is equipped with the scaffold, and the scaffold is fixed on the pier.
[0010] The utility model discloses a support device for bridge bent cap prestress tensioning construction, and the support column, the cantilever beam and the reinforcing rib are all made of I -steel, and the connecting place all adopts the welding connection.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] The technical scheme of the utility model is favorable for solving the problems of high-altitude large-size bridge bent cap prestress steel bundle tensioning limitation, large jack weight and difficult movement, and can effectively improve prestress tensioning convenience, greatly reduce safety operation risk, and the cantilever support device has simple structure, convenient material selection and easy assembly and construction, and has high application and popularization value.
[0013] The utility model will be described in more detail in connection with the drawings and embodiments. DRAWINGS
[0014] The contents expressed by each drawing of the specification and the marks in the drawing will be briefly described as follows:
[0015] Figure 1 It is the support device elevation schematic view of the utility model.
[0016] Figure 2 It is the support device side schematic view of the utility model.
[0017] Figure 3 It is the connection steel plate plane schematic view of the utility model.
[0018] The marks in the drawing are:
[0019] 1, bent cap, 2, embedded steel bar, 3, connection steel plate, 4, support column, 5, reinforcing rib, 6, cantilever beam, 7, "8" type hoisting connecting piece, 8, hand-operated hoist, 9, jack, 10, transverse steel bar, 11, scaffold. DETAILED DESCRIPTION
[0020] The shape, structure, mutual position and connecting relationship between parts, the function and working principle of each part, manufacturing process and operation method of each component involved in the specific implementation of the utility model will be further described below with reference to the drawings and the description of the embodiments to help the skilled in the art have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the utility model.
[0021] As Figure 1 , Figure 2 and Figure 3 indicated, a support device for bridge bent cap prestressed tensioning construction, comprising a bent cap 1, a pre-buried steel bar 2 and a tensioning part, the tensioning part is arranged on both sides of the bent cap 1, the bent cap 1 is provided with a pre-buried hole at both ends, the top of the pre-buried hole is provided with a connecting steel plate 3, the pre-buried steel bar 2 penetrates through the connecting steel plate 3 and enters the pre-buried hole, and the tensioning part is connected with the pre-buried steel bar 2 through the connecting steel plate 3; the tensioning part comprises a support column 4 and a cantilever beam 6, wherein the middle part of the cantilever beam 6 is provided with an "8"-shaped hoisting connecting piece 7, the bottom of the "8"-shaped hoisting connecting piece 7 is connected with a hand-operated hoist 8, the hand-operated hoist 8 is connected with a jack 9, and the position of the jack 9 is lifted; the support column 4 and the cantilever beam 6 are provided with a reinforcing rib 5; the support column 4, the cantilever beam 6 and the reinforcing rib 5 are all fixed by welding, the cantilever beam 6 is provided with pre-buried holes, and the two pre-buried holes are connected through a transverse steel bar 10; the bottom of the bent cap 1 is provided with a scaffold 11, and the scaffold 11 is fixed on a pier; the support column 4, the cantilever beam 6 and the reinforcing rib 5 are all made of I-shaped steel, and the connecting parts are all connected by welding.
[0022] Working principle and method
[0023] 1. When the bent cap 1 of the bridge is constructed, the hole is reserved in advance at the corresponding position, the pre-buried steel bar 2 is installed into the corresponding hole in time after the concrete maintenance of the bent cap 1 is completed.
[0024] 2. The support column 4, the reinforcing rib 5 and the cantilever beam 6 are fixed by welding, and the corresponding holes are reserved on the cantilever beam to facilitate the installation of the transverse steel bar 10 in the later period.
[0025] 3. The connecting steel plate 3 is cut and made.
[0026] 4. The assembled support frame is connected with the pre-buried steel bar 2 through the connecting steel plate 3.
[0027] 5. The transverse steel bar 10 is inserted into the hole reserved in the cantilever beam 6, and is connected with the hand-operated hoist 8 through the "8"-shaped hoisting connecting piece 7.
[0028] 6. The jack 9 is lifted through the hand-operated hoist 8, and then the prestressed tensioning work of the bent cap 1 is completed.
[0029] Note: in step 2, when the support column 4, the reinforcing rib 5 and the cantilever beam 6 are assembled and fixed, the end of the connecting piece between the components should be fixed firmly to prevent the cantilever beam 6 from falling off during the lifting of the jack 9, causing high-altitude hazards; Note: in step 4, when the assembled support frame is connected and fixed with the connecting steel plate 3, they should be connected firmly; Note: in step 6, when the hand-operated hoist 8 is used to lift the tensioning jack 9, it should be operated slowly.
[0030] The utility model has been described above in connection with the drawings, obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, all are within the protection scope of the utility model.
Claims
1. A support device for bridge bent cap prestressed tensioning construction, comprising a bent cap, a pre-embedded steel bar and a tensioning part, the tensioning part is arranged on both sides of the bent cap, characterized in that, The cover beam is provided with pre-buried holes at both ends, the top of the pre-buried hole is provided with a connecting steel plate, a pre-buried steel rod penetrates through the connecting steel plate and goes into the pre-buried hole, and the tensioning part is connected with the pre-buried steel rod through the connecting steel plate; the tensioning part comprises a support column and a cantilever beam, wherein the middle part of the cantilever beam is provided with an "8" type hoisting connecting piece, the bottom of the "8" type hoisting connecting piece is connected with a hand-operated hoist, the hand-operated hoist is connected with a jack, and the hand-operated hoist is used to lift the position of the jack.
2. The support device for the prestress tension construction of the bridge bent cap according to claim 1, characterized in that, The support column and the cantilever beam are provided with a reinforcing rib therebetween.
3. The support device for the prestress tension construction of the bridge bent cap according to claim 2, characterized in that, The support column, the cantilever beam and the reinforcing rib are all fixed by welding, the cantilever beam is provided with reserved holes, and the two reserved holes are connected through a transverse steel rod.
4. The support device for the prestress tension construction of the bridge bent cap according to claim 1, characterized in that, The bottom of the cover beam is provided with a scaffold, and the scaffold is fixed on the pier.
5. The support device for the prestress tension construction of the bridge bent cap according to claim 3, characterized in that, The support column, the cantilever beam and the reinforcing rib are all made of I-shaped steel, and the connecting parts are all connected by welding.