Shear wall top formwork rod and opposite-pull steel wire integrated device and construction method

Abstract

The invention relates to the technical field of building construction, in particular to a shear wall formwork jacking rod and opposite-pulling steel wire integrated device and a construction method.The shear wall formwork jacking rod and opposite-pulling steel wire integrated device comprises a prefabricated concrete jacking rod, the length of the prefabricated concrete jacking rod is matched with the distance between shear wall formworks, and end connecting nuts are embedded in the two ends of the prefabricated concrete jacking rod; and an outer end connecting screw rod is in threaded connection in the end head connecting nut. According to the technical scheme, it can be ensured that split bolt holes do not appear in the shear wall, the situation that the structural strength of the shear wall is affected by reservation of the bolt holes is avoided, and meanwhile the leakage risk of an outer wall can be reduced; in addition, due to the fact that bolt holes do not need to be reserved, the cost of PVC materials and the cost of blocking the bolt holes can be saved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a shear wall top formwork rod and tensioning steel wire integrated device and a construction method. Background Art

[0002] At present, when shear wall formwork is supported, in order to save costs, PVC pipes are put on the outside of the tension screws during the installation and construction of the ground formwork to facilitate the removal of the tension screws in the later stage. However, the PVC pipes are generally reserved in the shear wall concrete, and cement slurry is used to seal the reserved holes for the tension screws in the later stage. This method has the following two adverse effects on the structural shear wall. First, since the spacing of the tension screw eyes reserved on the shear wall is 450mm in the vertical and horizontal directions and the number is large, the structural strength of the concrete shear wall is affected. Second, for the external wall bolt eyes, cement mortar is used to seal them and then polyurethane is applied. However, since the durability of the waterproof material is short and it is easy to be damaged during the construction of the external wall insulation nails, there will be a local leakage risk for a long time under the influence of rainwater. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a shear wall top formwork rod and tensioning wire integrated device and construction method.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A shear wall top formwork rod and tension wire integrated device includes a precast concrete top rod, the length of the precast concrete top rod is adapted to the spacing of the shear wall formwork, end connecting nuts are embedded at both ends of the precast concrete top rod, and the end connecting nuts are threadedly connected to the outer end connecting screws.

[0005] Preferably, a further technical solution of the present invention is: Preferably, a steel wire for connecting the connecting nuts at both ends is provided in the precast concrete top rod.

[0006] Preferably, two steel wires are provided and are welded and fixed to the end connection nuts at both ends.

[0007] The present invention also discloses a construction method, which is applied to the above-mentioned shear wall top formwork rod and tension wire integrated device, and the specific steps are as follows: Determine the size of the precast concrete top rod according to the design and construction size of the shear wall formwork, and select the end connecting nut of appropriate size and the outer end connecting screw that matches the end connecting nut; Use cement mortar with a strength grade of not less than C30 to cast the precast concrete top rods. During the casting process, embed end connection nuts at both ends of the precast concrete top rods. After the shear wall reinforcement is tied, the first side formwork is temporarily installed in place. After that, after the first end of the precast concrete top rod is connected to the outer end connecting screw, the outer end connecting screw is passed through the formwork through-hole of the first side formwork and a fixing nut is screwed into the outer end connecting screw for temporary fixation. Install the second side formwork, during the installation process, connect the outer end connecting screw to the second end of the precast concrete top stick, and at the same time, pass the outer end connecting screw of the second end through the formwork through-hole of the second side formwork; Install the secondary keels and main keels on both sides of the formwork, and use mountain clips and fastening nuts on the outer end connecting screws to fix the secondary keels and main keels in place; After the formwork is set up, the shear wall concrete is poured. When the strength of the poured concrete reaches 2.5MPA or above, the fastening nuts, mountain clips, main purlins and secondary purlins on both sides are removed in sequence. After the dismantling is completed, the second side formwork is removed from the outer end connecting screws, the fixing nuts are removed and the first side formwork is separated from the outer end connecting screws, and finally the outer end connecting screws at both ends are separated from the end connecting nuts.

[0008] Preferably, the end connecting nuts are pre-embedded before they are pre-embedded and after the steel wires are welded between the end nuts.

[0009] Preferably, the precast concrete top rod needs to be cured for more than 28 days after prefabrication.

[0010] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: It can ensure that there are no tension bolt eyes on the shear wall, avoiding the impact of bolt eye reservation on the structural strength of the shear wall. At the same time, for the exterior wall, it can reduce the risk of leakage; and since there is no need to reserve bolt eyes, it can save the cost of PVC materials and the cost of plugging bolt eyes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 2 is a schematic structural diagram of a shear wall top formwork rod and tension wire integrated device according to an embodiment of the present invention; Figure 2 Schematic diagram of the construction status of the integrated device of shear wall top formwork rod and tensioning wire in an embodiment of the present invention.

[0012] Explanation of the accompanying reference numerals: 1. Precast concrete top rod; 2. Steel wire; 3. End connecting nut; 4. Outer end connecting screw; 5. First side formwork; 6. Fixing nut; 7. Second side formwork; 8. Secondary keel; 9. Main keel; 10. Mountain-shaped clip; 11. Fastening nut. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with specific embodiments. The purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0014] like Figure 1 and Figure 2 As shown, this embodiment provides an integrated device of a shear wall top form rod and a tensioning wire, including a precast concrete top rod 1, the length of the precast concrete top rod 1 is adapted to the spacing of the shear wall formwork, and end connecting nuts 3 are embedded at both ends of the precast concrete top rod 1, and an outer end connecting screw 4 is threadedly connected to the end connecting nut 3.

[0015] During implementation, a steel wire 2 is provided inside the precast concrete top rod 1 for connecting the connecting nuts 3 at both ends to enhance the pre-embedded strength.

[0016] Two steel wires 2 are provided and are welded and fixed to the end connection nuts 3 at both ends.

[0017] The embodiment of the present invention further provides a construction method, which is applied to the above-mentioned shear wall top formwork rod and tension wire integrated device, and the specific steps are as follows: Determine the size of the precast concrete top rod 1 according to the design and construction size of the shear wall formwork, and select the end connecting nut 3 of appropriate size and the outer end connecting screw 4 adapted to the end connecting nut 3; The precast concrete top rod 1 is cast using concrete cement mortar with a strength grade not less than C30, and end connection nuts 3 are embedded at both ends of the precast concrete top rod 1 during the casting process; After the shear wall reinforcement is tied, the first side formwork 5 is temporarily installed in place. After that, after the first end of the precast concrete top rod 1 is connected to the outer end connecting screw 4, the outer end connecting screw 4 is passed through the formwork perforation of the first side formwork 5 and the fixing nut 6 is screwed into the outer end connecting screw 4 for temporary fixation; Install the second side formwork 7. During the installation process, the outer end connecting screw 4 is connected to the second end of the precast concrete top rod 1, and the outer end connecting screw 4 of the second end passes through the formwork through-hole of the second side formwork 7; Install the secondary keels 8 and main keels 9 on both sides of the formwork, and use the mountain clips 10 and fastening nuts 11 on the outer end connecting screws 4 to fix the secondary keels 8 and main keels 9 in place; After the formwork is set up, the shear wall concrete is poured. When the strength of the poured concrete reaches 2.5 MPA or above, the fastening nuts 11, mountain-shaped clips 10, main purlins 9 on both sides and secondary purlins 8 are removed in sequence. After the dismantling is completed, the second side formwork 7 is removed and separated from the outer end connecting screw 4, the fixing nut 6 is removed and the first side formwork 5 is separated from the outer end connecting screw 4, and finally the outer end connecting screws 4 at both ends are separated from the end connecting nuts 3.

[0018] In practice, the end connecting nuts 3 are embedded before they are embedded, and the steel wires 2 are welded between the end nuts 3 and embedded after the welding is completed.

[0019] The precast concrete top rod 1 needs to be cured for more than 28 days after prefabrication; the cross-sectional size of the precast concrete top rod 1 is 30*30mm, the diameter of the steel wire 2 is 3mm, the inner diameter of the end connecting nut 3 is 14mm, and the length of the weld between the steel wire 2 and the end connecting nut 3 is not less than 15mm.

[0020] The solution provided by the embodiment of the present invention can ensure that no tension bolt holes appear on the shear wall, avoiding the impact of the reserved bolt holes on the structural strength of the shear wall. At the same time, for the exterior wall, the risk of leakage can be reduced; and since there is no need to reserve bolt holes, the cost of PVC materials and the cost of plugging the bolt holes can be saved.

[0021] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made by using the contents of the present invention description and the drawings are included in the scope of the present invention.

Claims

1. A shear wall top formwork rod and tension wire integrated device, characterized in that: The precast concrete top rod comprises a precast concrete top rod, the length of which is adapted to the spacing between the shear wall templates, and end connection nuts are embedded at both ends of the precast concrete top rod, in which the end connection nuts are threadedly connected with outer end connection screws.

2. The shear wall top formwork rod and tension wire integrated device according to claim 1 is characterized in that: The precast concrete top rod is provided with steel wires for connecting the connecting nuts at both ends.

3. The shear wall top formwork rod and tension wire integrated device according to claim 2, characterized in that: Two steel wires are provided and are fixed by welding with nuts at both ends.

4. A construction method, characterized in that: The shear wall top formwork rod and tension wire integrated device according to any one of claims 1 to 3 is applied, and the specific steps are as follows: Determine the size of the precast concrete top rod according to the design and construction size of the shear wall formwork, and select the end connecting nut of appropriate size and the outer end connecting screw that matches the end connecting nut; Use cement mortar with a strength grade of not less than C30 to cast the precast concrete top rods. During the casting process, embed end connection nuts at both ends of the precast concrete top rods. After the shear wall reinforcement is tied, the first side formwork is temporarily installed in place. After that, after the first end of the precast concrete top rod is connected to the outer end connecting screw, the outer end connecting screw is passed through the formwork through-hole of the first side formwork and a fixing nut is screwed into the outer end connecting screw for temporary fixation. Install the second side formwork, during the installation process, connect the outer end connecting screw to the second end of the precast concrete top stick, and at the same time, pass the outer end connecting screw of the second end through the formwork through-hole of the second side formwork; Install the secondary keels and main keels on both sides of the formwork, and use mountain clips and fastening nuts on the outer end connecting screws to fix the secondary keels and main keels in place; After the formwork is set up, the shear wall concrete is poured. When the strength of the poured concrete reaches 2.5MPA or above, the fastening nuts, mountain clips, main purlins and secondary purlins on both sides are removed in sequence. After the dismantling is completed, the second side formwork is removed from the outer end connecting screws, the fixing nuts are removed and the first side formwork is separated from the outer end connecting screws, and finally the outer end connecting screws at both ends are separated from the end connecting nuts.

5. The construction method according to claim 4, characterized in that: Before the end connection nuts are embedded, the steel wires are welded between the end nuts and embedded after welding is completed.

6. The construction method according to claim 4, characterized in that: Precast concrete top bars need to be cured for more than 28 days after prefabrication.

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