Partially disassembly-free shear groove template
By combining the upper and lower formwork with the middle layer of non-removable formwork, the problem of one-time use and cleaning of shear channel formwork is solved, the integrity of the reinforcing steel and the bonding of the concrete are optimized, and the construction cost and operation difficulty are reduced.
Patent Information
- Application Number
- CN202520173268.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing shear groove formwork has problems in the construction of steel-concrete composite beams, such as single-use, difficulty in ensuring the integrity of secondary connections, and unsatisfactory cleaning effect, which affects the quality of the project and increases the cost of manpower and materials.
The system adopts a combination structure of upper and lower formwork and middle layer non-removable formwork. The middle layer formwork is equipped with mesh and soft rubber strips. The rubber strips prevent grout leakage, the mesh enhances the bonding ability of the concrete, and the formwork can be reused.
This method achieves a tight bond between new and old concrete, avoids cutting the reinforcing bars, reduces labor and material costs, simplifies the roughening and cleaning process, and improves the quality of the project.
Smart Images
Figure CN223880751U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel concrete superimposed beam construction equipment technical field, concretely is a kind of partial dismantling's shear slot form. BACKGROUND
[0002] In the steel concrete superimposed beam construction process, precast concrete slab needs to reserve shear slot, and it is convenient for concrete slab and steel box girder to superimpose into whole.
[0003] When shear slot is reserved larger, it is usually needed to cut off part of reinforcement, and to connect again in post-pouring.But the existing shear slot formwork is difficult to guarantee the integrity of secondary connection, and it is easy to cause stress concentration of reinforcement and other phenomena, which affects the engineering quality.
[0004] When shear slot is small and the number is more on the same panel, due to the need to reserve the reinforcement in the shear slot, if there are horizontal, vertical and multi-level reinforcement, it is difficult to install and remove multiple formworks. The existing formwork is disposable, although it preserves the integrity of the reinforcement, but it increases the cost of manpower and material resources.
[0005] In addition, using the existing mold, in order to enhance the connection firmness of post-pouring concrete and reserved shear slot, high-pressure water washing and chiseling technology is needed in the narrow space formed by longitudinal and transverse steel bars after the formwork is removed, the surface of shear slot is washed by water gun until the surface aggregate is obvious, and the local chiseling effect is not ideal or there is residual concrete slag. Manual cleaning is also needed, which is difficult to operate and time-consuming. SUMMARY
[0006] The utility model aims at providing a kind of partial dismantling's shear slot formwork, can solve the technical problems that existing shear slot formwork can only be used once, and it is difficult to chisel and clean.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions.
[0008] A kind of partial dismantling's shear slot formwork, including the upper formwork being arranged above shear slot top layer stress reinforcement mesh, the lower formwork being arranged below shear slot bottom layer stress reinforcement mesh, the middle layer dismantling-free formwork being arranged between upper formwork and lower formwork.
[0009] Upper formwork and lower formwork are oppositely arranged, and upper formwork and lower formwork are provided with flanges on the opposite sides along the edge.
[0010] The flanges of upper formwork and lower formwork are matched with the middle layer dismantling-free formwork at both ends, to form a surrounding structure with upper formwork and lower formwork, and the middle layer dismantling-free formwork is also provided with mesh holes.
[0011] Further, the mesh holes are uniformly distributed on the middle layer formwork, the mesh holes are inverted triangular, the mesh holes are made by stamping process, and the two sides of the lower side of the inverted triangular are cut and broken, the top side of the inverted triangular is not broken, and the middle part of the mesh hole is folded towards the inner side of the middle layer formwork along the top side to form a tooth port for enhancing the combination capacity with the post-poured concrete.
[0012] Further, the middle layer formwork is provided with soft rubber strips between the flanges of the upper formwork and the lower formwork.
[0013] Further, the flanges of the upper formwork and the lower formwork are provided with notches for avoiding the steel bars in the shear slot top layer or bottom layer stress steel bar mesh.
[0014] Further, the upper formwork is a wooden formwork, and the top of the upper formwork is provided with a wooden handrail.
[0015] Further, the lower formwork is made of a steel plate.
[0016] After the above technical scheme is adopted, the utility model has the following beneficial effects:
[0017] 1. The unique rough surface formed by the concrete and the middle layer formwork provided with mesh holes provides a good joint basis for subsequent pouring of new concrete, ensures that the new and old concrete can be closely combined, saves the steps of manual chiseling, cleaning and maintenance, and can reduce the crack problem of the concrete surface layer caused by drying shrinkage.
[0018] 2. The connection between the upper formwork, the lower formwork and the middle layer formwork is provided with soft rubber strips, the rubber is deformed and blocked in the gap between the formworks after the face plate is clamped, and can effectively prevent slurry leakage.
[0019] 3. By adopting the combination mode of the upper formwork, the lower formwork and the middle layer formwork provided with mesh holes, the cutting of the steel bars is effectively avoided, so that the integrity of the steel structure is ensured.
[0020] 4. The upper formwork and the lower formwork are convenient to remove and reuse, and the cost of labor and materials is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 is the overall structure schematic view of the utility model.
[0022] Fig. 2 is the overall structure schematic view of the upper formwork and the lower formwork in the utility model.
[0023] Fig. 3 is the overall structure schematic view of the middle layer formwork and the stress steel bar mesh in the utility model.
[0024] Fig. 4 is the state schematic view of the lower formwork fixed on the bridge deck slab bottom die in the utility model.
[0025] Attached diagram descriptions: 1. Upper formwork; 11. Handrail; 2. Lower formwork; 3. Middle layer non-removable formwork; 31. Mesh; 4. Flanged edge; 41. Notch; 5. Bridge deck bottom formwork; 51. Top layer reinforcing mesh of shear groove; 52. Bottom layer reinforcing mesh of shear groove. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the features and performance of a partially disassembled shear groove template of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0027] like Figs. 1-4 As shown, a partially removable shear groove formwork includes an upper formwork 1 located above the top layer of reinforcing steel mesh 51 at the shear groove opening, a lower formwork 2 located below the bottom layer of reinforcing steel mesh 52 at the shear groove opening, and a middle layer removable formwork 3 located between the upper formwork 1 and the lower formwork 2.
[0028] The upper template 1 is a wooden template with a wooden handrail 11 at its top. The lower template 2 is made of steel plate. The upper template 1 and lower template 2 are arranged opposite each other, and both the upper template 1 and lower template 2 have flanges 4 along their edges on their facing sides. Specifically, the dimensions of the upper template 1 and lower template 2 are determined according to the dimensions of the shear groove to be set. Preferably, in this embodiment, the dimensions of the upper template 1 and lower template 2 are 700mm in length, 500mm in width, and 10mm in thickness.
[0029] The upper template 1 and the lower template 2 have notches 41 on their flanges 4 to avoid the reinforcing bars in the top or bottom layer of the shear groove's reinforcing mesh.
[0030] The middle layer of the non-removable template 3 is fitted with the flanges 4 of the upper template 1 and the lower template 2 at both ends, and is used to form an enclosing structure together with the upper template 1 and the lower template 2. The middle layer of the non-removable template 3 is also provided with mesh holes 31.
[0031] Mesh 31 is evenly distributed on the intermediate layer of the formwork 3. The mesh 31 is inverted triangular in shape and is manufactured using a stamping process. The two lower sides of the inverted triangle are cut and pressed off, while the top edge remains uncut. The center of the mesh 31 is folded inwards along the top edge towards the inner side of the intermediate layer of the formwork 3 to form a tooth, which enhances the bonding ability with the subsequently poured concrete. Specifically, the intermediate layer of the formwork can be made of a suitable size of quick-closing mesh. Preferably, in this embodiment, the quick-closing mesh is made of galvanized sheet metal, 0.4mm thick and 225mm wide.
[0032] A soft rubber strip is provided between the middle layer non-removable template 3 and the flange 4 of the upper template 1 and the lower template 2.
[0033] In the implementation, the overall formwork of the bridge deck slab is determined according to the design size of the shear notch and the bridge deck slab.
[0034] After the lower formwork 2 is welded with the bridge deck slab bottom formwork 5 into a whole, the internal steel bars of the bridge deck slab can be arranged.
[0035] The number and interval of the notches 41 on the upper formwork 1 should be the same as the distribution of the steel bars in the top layer of the force-bearing steel bar mesh 51, and the number and interval of the notches 41 on the lower formwork 2 should be the same as the distribution of the steel bars in the bottom layer of the force-bearing steel bar mesh 52.
[0036] After the steel bars are arranged, the middle layer of the removable formwork 3 is installed, and the toothed side is directed to the inside, and the back is bound with the steel bars by the binding wire.
[0037] When the diameter of the steel bar passing through the middle layer of the removable formwork 3 is large, the mesh hole can be cut, and the steel bar is pulled back to the position after the steel bar passes through.
[0038] After the installation is completed, the soft rubber strip is filled in the connection between the upper and lower formworks and the turn-up 4, and the concrete can be poured.
[0039] After the demolding, the upper and lower formworks coated with the demolding agent need to be air-dried for 1-2 hours before being used for the next pouring of the concrete.
[0040] It should be noted that the parts not described in detail in the scheme are all prior art, and the above examples are only used to illustrate the utility model, but the utility model is not limited to the above examples, and any simple modification, equivalent change and modification according to the technical essence of the utility model are all within the protection scope of the utility model.
Claims
1. A partially removable shear groove template, characterized in that: It includes an upper formwork (1) set above the top layer of shear groove reinforcing mesh (51), a lower formwork (2) set below the bottom layer of shear groove reinforcing mesh (52), and a middle layer non-removable formwork (3) set between the upper formwork (1) and the lower formwork (2). The upper template (1) and the lower template (2) are set opposite to each other. Both the upper template (1) and the lower template (2) have flanges (4) around the edge on the opposite side. The two ends of the middle layer non-removable template (3) are respectively matched with the flanges (4) of the upper template (1) and the lower template (2) to form an enclosing structure together with the upper template (1) and the lower template (2). The middle layer non-removable template (3) is also provided with mesh (31).
2. The partially removable shear groove template as described in claim 1, characterized in that: The mesh (31) is evenly distributed on the middle layer of the non-removable template (3). The mesh (31) is inverted triangular in shape. The mesh (31) is made by stamping process. The two sides of the bottom of the inverted triangle are cut and crushed, while the top edge of the inverted triangle is not crushed. The middle part of the mesh (31) is folded along the top edge towards the inside of the middle layer of the non-removable template (3) to form a tooth, which is used to enhance the bonding ability with the later poured concrete.
3. A partially removable shear groove template as described in claim 1, characterized in that: A soft rubber strip is provided between the middle layer non-removable template (3) and the flange (4) of the upper template (1) and the lower template (2).
4. A partially removable shear groove template as described in claim 1, characterized in that: The flanges (4) of the upper template (1) and the lower template (2) are provided with notches (41) to avoid the reinforcing bars in the top or bottom layer of the shear groove.
5. A partially removable shear groove template as described in claim 1, characterized in that: The upper template (1) is a wooden template, and a wooden handrail (11) is provided on the top of the upper template (1).
6. A partially removable shear groove template as described in claim 1, characterized in that: The lower template (2) is made of steel plate.