Prefabricated box girder wedge-shaped block adjusting and tensioning corner-chipping-preventing unloading device
The adjustable bolt and plate system for prefabricated box beams addresses the issue of stress cracks and collapse by evenly distributing pressure, ensuring structural stability and quality.
Patent Information
- Application Number
- CN202323523550.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-23
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-23
AI Technical Summary
Existing prefabricated box beam wedge block mold assemblies suffer from stress cracks and potential collapse due to downward pressure during the prestressing process, leading to structural instability.
A device with adjustable bolts and plates to support the wedge blocks, allowing for precise adjustment of the inclined surface to match the beam's slope, preventing corner collapse by distributing pressure evenly.
Prevents stress cracks and collapse by ensuring even pressure distribution, maintaining structural integrity and improving prefabrication quality.
Smart Images
Figure CN222270680U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of prefabricated box beams, in particular to a wedge block adjustment and tensioning device for preventing corner collapse and falling of prefabricated box beams. Background Art
[0002] Existing prefabricated box beam wedge block mold assemblies, such as Chinese patent publication number CN219926369U, disclose a variable position prefabricated box beam wedge block mold assembly, which includes a steel pedestal arranged on a hardened site, the steel pedestal being composed of two H-shaped steels; a distribution beam being arranged above the end of the steel pedestal, the distribution beam being composed of several channel steels; a steel frame being installed above the distribution beam, a wedge block mold being placed above the steel frame and being movable above the steel frame, the wedge block mold being a concave steel plate mold.
[0003] Although the above patent is easy to install and adjust and has a simple structure, the beam body is arched in the middle of the span during the prestressing process, and the two ends of the box beam exert downward pressure on the bottom mold. If the end of the bottom mold remains in the position during pouring, the compression of the beam body and the template will cause stress cracks to appear at the position where the end of the box beam contacts the bottom mold, which may cause the bottom plate of the beam end to collapse in severe cases. Therefore, this application proposes a prefabricated box beam wedge block adjustment and tensioning anti-collapse unloading device. Utility Model Content
[0004] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:
[0005] A device for adjusting and tensioning the wedge blocks of a prefabricated box beam to prevent corner collapse and falling comprises: a bottom steel plate, a first adjusting bolt for adjusting the height of the end bottom mold is installed at the lower part of the bottom steel plate, a second adjusting bolt for adjusting the height of the wedge block is provided at the upper part of the bottom steel plate, a mold bottom plate for prefabricated box beam wedge blocks is fixedly connected to the upper part of the second adjusting bolt, a mold top plate is provided at the upper part of the mold bottom plate, a first vertical plate is welded to the upper part of the bottom steel plate, and mold side plates are respectively welded to the left and right sides of the mold bottom plate.
[0006] Preferably, the first adjusting bolt comprises a first stud, a first nut is welded to the lower portion of the first stud, and the first stud is threadedly connected to a first supporting nut.
[0007] Preferably, the second adjusting bolt comprises a second stud, and the top of the second stud is welded to the mold bottom plate through a connecting block.
[0008] Preferably, the lower portion of the second stud is threadedly connected to a second supporting nut.
[0009] Preferably, a plurality of square tubes are welded to the lower portion of the bottom steel plate.
[0010] Preferably, a channel steel is welded to the upper portion of the first vertical plate.
[0011] Preferably, a second steel plate is welded to the lower portion of the mold top plate.
[0012] Preferably, a first ribbed plate is welded between the first vertical plate and the mold top plate, a second ribbed plate is welded between the first ribbed plate and the mold side plate, and a third ribbed plate is welded at the lower part of the second ribbed plate.
[0013] An adjustment mold for adjusting the embedded steel plate of the wedge block is set in the prefabricated pedestal at the bottom of the prefabricated box beam to serve as the bottom template of the wedge block. The adjustment mold utilizes the principle of screw height adjustment and can adjust the slope to meet the different slopes of the wedge block at the bottom of the prefabricated box beam, so as to support the prefabricated template of the wedge block. At the same time, the template can be quickly detached by adjusting the screw downward.
[0014] After the box girder is steamed and reaches the designed tensioning conditions, the operator uses a wrench to adjust the bolts at the bottom of the two ends of the bottom mold trolley to reduce the segment height by about 4 cm. Then the prestressing tensioning operation begins. When all the prestressed tendons of the box girder are tensioned, the middle of the box girder arches by 2 cm and the two ends drop by about 1 cm. Due to the downward buffer distance set at the end of the beam, the box girder will not crack or even collapse due to extrusion. The outer dimensions of the box girder are guaranteed to be complete, and the prefabrication quality of the box girder is improved.
[0015] The utility model has at least the following beneficial effects:
[0016] In the utility model, a bottom steel plate is provided, a first adjusting bolt is installed at the lower part of the bottom steel plate, the first adjusting bolt is used to adjust the height of the end bottom mold, and a second adjusting bolt is provided at the upper part of the bottom steel plate, the second adjusting bolt is used to adjust the height of the wedge block, and the coordinated adjustment of the first adjusting bolt and the second adjusting bolt can adjust the inclined surface that meets the different slopes of the wedge block at the bottom of the prefabricated box beam to achieve the function of supporting the prefabricated template of the wedge block, thereby preventing cracks and corner collapse. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0018] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;
[0019] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;
[0020] Figure 3This is a schematic diagram of the second adjusting bolt structure of the utility model;
[0021] Figure 4 This is a schematic diagram of the square tube structure of the utility model.
[0022] Description of Figure Numbers:
[0023] 1. Square tube; 2. Bottom steel plate; 3. First adjusting bolt; 31. First nut; 32. First stud; 33. First supporting nut; 4. Mold top plate; 5. Channel steel; 6. Second steel plate; 7. First vertical plate; 8. Second adjusting bolt; 81. Second supporting nut; 82. Second stud; 83. Connecting block; 9. Mold bottom plate; 10. First ribbed plate; 11. Mold side plate; 12. Second ribbed plate; 13. Third ribbed plate. DETAILED DESCRIPTION
[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0025] Please refer to Figures 1 to 4 As shown, this embodiment provides a prefabricated box girder wedge block adjustment and tensioning anti-collapse angle unloading device, including: a bottom steel plate 2, a first adjusting bolt 3 for adjusting the end bottom mold height is installed at the lower part of the bottom steel plate 2, a second adjusting bolt 8 for adjusting the wedge block height is provided at the upper part of the bottom steel plate 2, a mold bottom plate 9 for prefabricated box girder wedge blocks is fixedly connected to the upper part of the second adjusting bolt 8, a mold top plate 4 is provided at the upper part of the mold bottom plate 9, a first vertical plate 7 is welded to the upper part of the bottom steel plate 2, and mold side plates 11 are respectively welded to the left and right sides of the mold bottom plate 9.
[0026] The first adjusting bolt 3 comprises a first stud 32 , a first nut 31 is welded to the lower part of the first stud 32 , and the first stud 32 is threadedly connected to a first supporting nut 33 , and the height can be adjusted by rotating the first supporting nut 33 .
[0027] The second adjusting bolt 8 includes a second stud 82 , and the top of the second stud 82 is welded to the mold bottom plate 9 through a connecting block 83 .
[0028] The lower part of the second stud 82 is threadedly connected to the second support nut 81 , and the height can be adjusted by rotating the second support nut 81 .
[0029] A plurality of square tubes 1 are welded to the lower part of the bottom steel plate 2 to strengthen the support of the bottom steel plate 2 and prevent it from deformation.
[0030] A channel steel 5 is welded to the upper portion of the first vertical plate 7 to play a supporting role.
[0031] A second steel plate 6 is welded to the lower part of the mold top plate 4 to play a supporting role.
[0032] A first ribbed plate 10 is welded between the first vertical plate 7 and the mold top plate 4, a second ribbed plate 12 is welded between the first ribbed plate 10 and the mold side plate 11, and a third ribbed plate 13 is welded to the lower part of the second ribbed plate 12 to support the mold.
[0033] The working principle of the utility model is as follows: the prefabricated box beam wedge block adjustment and tensioning anti-collapse angle unloading device is provided with a bottom steel plate 2, and a first adjusting bolt 3 is installed at the lower part of the bottom steel plate 2. The first adjusting bolt 3 is used to adjust the height of the end bottom mold. By rotating the first supporting nut 33 on the six first studs 32, the height of the entire end bottom mold can be adjusted;
[0034] A second adjusting bolt 8 is provided on the upper part of the bottom steel plate 2. The second adjusting bolt 8 is used to adjust the height of the wedge block. The height of the wedge block can be adjusted by rotating the second supporting nuts 81 on the four second studs 82.
[0035] When in use, the coordinated adjustment of the first adjusting bolt 3 and the second adjusting bolt 8 can adjust the inclined surface to meet the different slopes of the wedge block at the bottom of the prefabricated box beam, thereby achieving the function of supporting the prefabricated template of the wedge block.
[0036] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A prefabricated box beam wedge block adjustment and tensioning anti-angle collapse unloading device, characterized in that: include: A bottom steel plate (2), wherein a first adjusting bolt (3) for adjusting the height of the end bottom mold is installed at the lower part of the bottom steel plate (2), a second adjusting bolt (8) for adjusting the height of the wedge block is provided at the upper part of the bottom steel plate (2), a mold bottom plate (9) for prefabricating the box beam wedge block is fixedly connected to the upper part of the second adjusting bolt (8), a mold top plate (4) is provided at the upper part of the mold bottom plate (9), a first vertical plate (7) is welded to the upper part of the bottom steel plate (2), and mold side plates (11) are respectively welded to the left and right sides of the mold bottom plate (9).
2. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: The first adjusting bolt (3) comprises a first stud (32), a first nut (31) is welded to the lower part of the first stud (32), and the first stud (32) is threadedly connected to a first supporting nut (33).
3. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: The second adjusting bolt (8) comprises a second stud (82), and the top of the second stud (82) is welded to the mold bottom plate (9) via a connecting block (83).
4. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 3, characterized in that: The lower portion of the second stud (82) is threadedly connected to a second supporting nut (81).
5. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: A plurality of square tubes (1) are welded to the lower part of the bottom steel plate (2).
6. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: A channel steel (5) is welded to the upper portion of the first vertical plate (7).
7. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: A second steel plate (6) is welded to the lower part of the mold top plate (4).
8. The device for adjusting and tensioning the wedge block of a prefabricated box beam to prevent corner collapse and fall off according to claim 1, characterized in that: A first rib is welded between the first vertical plate (7) and the mold top plate (4) Plate (10), a second ribbed plate (12) is welded between the first ribbed plate (10) and the mold side plate (11), A third ribbed plate (13) is welded to the lower portion of the second ribbed plate (12).