Shaped and fabricated formwork construction process used for shear wall at expansion and contraction joint

A technology of combined formwork and construction technology, which is applied in the direction of formwork/formwork/work frame, connectors of formwork/formwork/work frame, and preparation of building components on site, which can solve the problems affecting project quality, construction period, expansion and contraction, etc. Shorten the construction period, reduce the construction difficulty and operation risk, and ensure the construction quality and safety.

Active Publication Date: 2014-08-27

闫相明

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AI-Extracted Technical Summary

Problems solved by technology

[0002] In recent years, with the development of the economy, housing has gradually changed from frame structure to frame-shear structure, from loose to dense. There are more and more large-scale frame-shear projects in high-rise buildings. Most of the construction of reinforced concrete shear walls is carried out with ordinary wooden boards, but the space at the expansion joints is narrow, and it is...

Method used

2) build common formwork 8 with planks on the other side of body of wall 9 relative expansion joints, arrange some steel pipes 2 in parallel on common formwork 8, can improve the intensity of common formwork 8, especially the shear wall of high-rise building , its load-bearing capacity is large and the construction requirements are high, so the 8 sides of the ordinary formwork also have high strength requirements;

4) mold release agent is brushed on one side of channel steel 1 at the template 3 of stereotyped composite template, and the bottom sticks double-sided adhesive; Release agent is conducive to the removal of stereotyped composite template, and double-sided adhesive can improve the sealing of template 3 bottoms performance;

7) Wall-through screw rod 4 passes through fastening nut 52, fastener 6, PVC casing 7, channel steel hole 11 successively, is fixed on the pull nut 51 of channel steel 1, and fastener 6 is commonly used Ingot buckle, on the steel pipe 2 fixed on the 8 sides of the ordinary formwork, several fastening steel pipes 21 perpendicular to it are arranged, and each fastening steel pipe 21 is arranged in a group of two, and the height corresponds to the bolt hole 11 on the channel steel 1, and is in the shape of "Yuanbao". "The fastener 6 compresses two fastening steel pipes 21, and tightens them with fastening nuts 52; one end of the through-wall screw 4 can be welded with a handle 41, and the handle 41 and the through-wall screw 4 are perpendicular to each other, making it enough to form a "T" type tail is convenient to hold by hand and can rotate the wall-penetrating screw 4 more labor-savingly, and the handle 41 can be a reinforcing bar.

A. according to the size of expansion joint place body of wall 9 splicing into the formwork 3 of corresponding size with plank, preliminary fixes with nail between plank; Plank is the thick cladding wood plywood of 18mm that generally adopts on construction site, connects gap place with carpentry Saw planing to ensure that the joints are dense;

B. arrange some steel pipes 2 in parallel on spliced template 3 and be gap setting between every two steel pipes 2, steel pipe 2 is fixed on template 3; Steel pipe 2 can be fixed on template with " U " type nail 3, control the length of the nails and cannot pass through the formwork 3, in order to prevent cracks or small holes in the formwork 3, causing the surface of the wall 9 to be poured in the future to be uneven; the steel pipes 2 are arrange...

Abstract

The invention discloses a shaped and fabricated formwork construction process used for a shear wall at an expansion and contraction joint. The construction process includes making a shaped and fabricated formwork; setting up a common formwork by using wood boards on the other side, opposite to the expansion and contraction joint, of a wall body; arranging positioning rebars at the root of the wall body of the shear wall; hoisting the shaped and fabricated formwork to one side, facing the expansion and contraction joint, of the wall body, preliminarily positioning the shaped and fabricated formwork through the rebars, and fixedly connecting the shaped and fabricated formwork with the common formwork through a wall-penetrating screw. By the shaped and fabricated formwork construction process, the problem that the expansion and contraction joint is narrow in space and high in construction difficulty is solved; personnel only needs to hoist the shaped and fabricated formwork to the side, facing the expansion and contraction joint, of the wall face, set up the common formwork on one side of a non-contraction joint of the shear wall, perform operation on an operating face and utilize the wall-penetrating screw to fix the shaped and fabricated formwork with the common formwork, so that construction difficulty and operating risk are lowered, construction efficiency is improved, and construction cycle is shortened.

Application Domain

Forms/shuttering/falseworksAuxillary members of forms/shuttering/falseworks

Technology Topic

RebarContraction joint +2

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Examples

Experimental program(1)

Example Embodiment

[0025] Reference Figure 1 to Figure 2 The stereotyped combined template of the present invention and its construction process embodiment will be further described.

[0026] A kind of construction process of shaped combined formwork for shear wall at expansion joint, including channel steel 1, steel pipe 2, wood board, steel bar, release agent, double-sided tape, wall screw 4, opposing nut 51, fastening Nut 52, fastener 6, PVC casing 7, including the following construction steps:

[0027] 1) Make a finalized combination template:

[0028] a. According to the size of the wall 9 at the expansion joint, use wooden boards to form a template 3 of the corresponding size, and initially fix the boards with nails; the boards are 18mm thick cladding wood plywood commonly used on the construction site, and the joints are flattened with a woodworking saw , To ensure that the seams are dense;

[0029] b. Arrange a number of steel pipes 2 in parallel on the spliced formwork 3 with a gap between each two steel pipes 2, and fix the steel pipes 2 on the formwork 3; the steel pipes 2 can be fixed on the formwork 3 with "U" nails, Control the length of the nail to not pass through the template 3, in order to prevent cracks or small holes in the template 3, resulting in uneven surface of the concrete wall 9 later; the steel pipes 2 are arranged equidistantly, so that each steel pipe 2 has the same force , To avoid a certain steel pipe 2 from breaking due to excessive force, so it can exert the maximum load-bearing capacity of each steel pipe 2 and improve the overall lateral pressure resistance of the shaped composite formwork;

[0030] c. Weld several channel steels 1 in parallel on the arranged steel pipes 2. Each channel steel 1 is perpendicular to several steel pipes 2, and there is a gap between every two channel steels 1; during production, the channel steel 1 is an equidistant arrangement (the spacing of the arrangement is determined according to the thickness of the channel steel 1 and the required compression requirements of the wall, etc.), so that the force of each channel steel 1 is the same to avoid a certain channel steel 1 due to force It is too large and broken, so it can exert the maximum load-bearing capacity of each channel steel 1 and improve the overall lateral pressure resistance of the shaped composite formwork;

[0031] d. The channel steel 1 is arranged with channel steel holes 11 along the length of the channel steel 1, and there are at least two steel pipes 2 between the two adjacent channel steel holes 11, and the corresponding channel steel holes 11 in the template 3 The position is provided with a template hole 31, the size of the channel steel hole 11 is adapted to the size of the wall screw 4, the size of the template hole 31 matches the size of the PVC sleeve 7, and the channel steel hole 11 is welded and pulled. Nut 51;

[0032] 2) On the other side of the wall 9 relative to the expansion joints, build the ordinary formwork 8 with wooden boards, and arrange several steel pipes 2 in parallel on the ordinary formwork 8, which can improve the strength of the ordinary formwork 8, especially the shear walls of high-rise buildings. Heavy weight and high construction requirements, so the 8 sides of ordinary formwork also have high strength requirements;

[0033] 3) Set fixed steel bars at the 9 roots of the shear wall, which can be fixed on the structural steel bars in the shear wall;

[0034] 4) Brush release agent on the side of the template 3 of the shaped composite template facing away from the channel steel 1, and stick double-sided tape on the bottom; the release agent is beneficial to the removal of the shaped composite template, and the double-sided adhesive can improve the sealing performance of the bottom of the template 3;

[0035] 5) Hoist the finalized composite formwork to the side of the wall 9 facing the expansion joint, so that the channel steel 1 is in a horizontal position, and initially position the finalized composite formwork through the steel bars; the verticality of the formwork 3 needs to be controlled during positioning;

[0036] 6) Set through holes 81 of equal size on the common template 8 corresponding to the template hole 31, and fix the two ends of the PVC sleeve 7 in the template hole 31 and the through hole 81 respectively;

[0037] 7) Pass the wall screw 4 through the fastening nut 52, the fastener 6, the PVC sleeve 7, and the channel steel hole 11 in turn, and fix it on the pair of pull nuts 51 of the channel steel 1. The fastener 6 is a commonly used ingot button. The steel pipe 2 fixed on the side of the ordinary formwork 8 is provided with a number of fastening steel pipes 21 perpendicular to it. Two fastening steel pipes 21 are arranged side by side, and the height corresponds to the bolt hole 11 on the channel steel 1. The piece 6 compresses the two fastening steel pipes 21 and fastens them with a fastening nut 52; one end of the wall-through screw 4 can be welded with a handle 41, and the handle 41 and the wall-through screw 4 are perpendicular to each other, making it a "T" The shaped tail is easy to hold by hand and can rotate through the wall screw 4 more labor-saving, and the handle 41 can be steel.

[0038] By adopting the above technical solution, the shaped combined formwork can be spliced with correspondingly sized formwork 3 according to the surface area of the shear wall 9 at the expansion joint. Fixed steel pipes 2 are arranged on the formwork 3, and channel steels 1 are arranged on the steel pipe 2. It is welded and fixed to form a stereotyped composite template. Its structure has strong integrity, high mechanical strength, and high safety factor. It can fully meet the construction requirements of shear walls in high-rise buildings, avoiding mold cracks, and effectively guaranteeing It improves the construction quality and safety, and they are all commonly used materials on the construction site. They can be built at any time on site. The operation is simple and flexible, and the construction speed is fast, which is conducive to improving the construction progress of the project and improving the comprehensive economic benefits.

[0039] The invention solves the problem of narrow expansion joint space and great difficulty in construction. It only needs to build the ordinary formwork 8 on the non-contraction joint side of the shear wall, and use the wall screw 4 to fix the stereotyped combined formwork and the ordinary formwork 8, which greatly reduces The difficulty of construction and dangerous operation improves the construction efficiency, effectively guarantees the quality of the concrete structure at this part, and shortens the construction period.

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Shaped and fabricated formwork construction process used for shear wall at expansion and contraction joint

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

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Description & Claims & Application Information

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