JP2003147784A - Steel form timbering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a work space, safety, and a concrete quality at concrete placing time without requiring tension from land slide protection in a basement construction method. SOLUTION: Concrete placing time Lateral pressure from hardware (a form) assembled by a steel member for receiving and supporting the lateral pressure from one side at concrete placing time by a concrete form (a one-sided push wall) such as a basement and a retaining wall, is received by a vertical member 2 composed of H shape steel. Reaction to the concrete lateral pressure is imparted by an oblique member 3 composed of H shape steel, composed of a bottom plate member 1 and H shape steel fixed by a pressure-proof board and a bolt, and obliquely connecting the vertical member and the bottom plate member. The hardware is formed by integrally strengthening three members by a reinforcing member 5 composed of L shape steel.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete wall formwork of a concrete structure such as a basement. 2. Description of the Related Art In a conventional method of supporting a concrete wall / single-pressed formwork, a lateral pressure at the time of placing concrete is applied from one side by a support method. In the case of the outer wall of the basement, a separator is attached to the retaining portion and the formwork is pulled from the retaining portion to support the concrete formwork. [0003] However, according to the above prior art, the method of supporting the formwork by the support shoring requires a large space to be stretched by the support. When constructing, there were difficulties in ensuring the work space, safety for workers, and quality. Also, in the method of pulling the formwork from the mountain retaining by the separator, the waterproofing at the place where the separator is attached penetrates, and there is a risk of flooding into the basement. Therefore, the present invention does not require tension from the mountain retaining in the basement wall form support,
It is an object to provide a work space, safety and quality improvement of concrete at the time of placing concrete. [0004] In order to solve the above-mentioned problems, the invention of claim 1 is directed to a method in which a concrete formwork (single-pressed wall) such as a basement or a supporting wall is pressed from one side during concrete placement. (A vertical member made of H-shaped steel receives side pressure when concrete is cast from the formwork, and a bottom plate member made of H-shaped steel and fixed with a pressure plate and bolts. The slanted member, which is made of a shape steel and connects the vertical member and the bottom plate member to the slug, has a reaction force against the concrete lateral pressure.
In addition, a metal member reinforced by integrating three members with a reinforcing member made of L-shaped steel. FIG. 1 shows an embodiment of the present invention. In the concrete basement construction method, the construction method of claim 1 is to carry out mounting of a mountain base, root cutting, abandoned concrete, and reinforcing bar reinforcement, and to fix a 13 mm reinforcing bar on a pressure-resistant version reinforcing bar, a long nut fixed reinforcing bar (9) has a length of 16 mm. Embedded length nut for anchoring (8)
1 as shown in Fig. 1 and anchoring the anchor (Fig. 2) to which the pull-out bolt (10) about 50mm below the neck is welded to the lower part of the long nut (Fig. 2) . After that, concrete with pressure-resistant version is cast, the wall is reinforced, and the inner wall formwork is erected, and the stopper metal (7) is installed at the place where the anchor for shoring is installed, and fixed to the pressure-resistant version Slab member (1) processed from H-shaped steel to be processed, and H that receives concrete lateral pressure applied to the formwork during concrete casting
Vertical member (2) processed from H-shaped steel and vertical member (2) processed from H-shaped steel to prevent the vertical member (2) from overturning due to lateral pressure
And a reinforcing member (4) for integrating and reinforcing the bottom plate member (1), the vertical member (2), and the oblique member (3), and a reinforcing member (5). Then, buckling prevention hardware (6) of steel form support is attached as shown in the figure,
Concrete is poured when the slab is ready for concrete placement. After the concrete curing period, the steel form supports are removed, the bolts on the pressure-resistant concrete to which the supports are fixed are removed, and then the bolt holes are filled with mortar to prevent rust. As described above, according to the present invention, the space for supporting the formwork is reduced, and as a result, a large work space can be obtained during construction, and the work efficiency is improved. Compared with the conventional method using the support support, the installation of the support work is simplified, and the work can be performed systematically. By integrating the steel support member and the formwork, there is no danger of the formwork collapsing, and the compaction of the vibrator when placing concrete can be performed with peace of mind, and the concrete can be accurately formed. Further, it is not necessary to pull the formwork from the mountain retaining, and it is not necessary to penetrate the waterproof layer. Since the shoring fixing bolts are filled with mortar after removing the steel form support, no rust is generated.

[Brief description of the drawings] FIG. 1 is a perspective view illustrating the present invention. FIG. 2 is a perspective view of a shoring fixing anchor. FIG. 3 is a perspective view of a working example of the present invention. [Explanation of symbols] 1 Bottom plate members 2 vertical members 3 Diagonal members 4 Reinforcement members 5 Reinforcement members 6 Buckling prevention hardware 7 Displacement stop hardware 8 Embedded length nut for anchoring 9 Reinforcing bar with long nut 10 Pull-out bolt

Claims (1)

[Claim 1] A hardware (concrete from a formwork) comprising a steel member for supporting a concrete form (one-sided wall) such as a basement and a supporting wall to receive lateral pressure from one side when placing concrete. The side pressure at the time of casting is received by a vertical member constituted by H-shaped steel, constituted by H-shaped steel, constituted by a bottom plate member fixed by pressure-resistant plates and bolts, and H-shaped steel,
A metal member that has a reaction force against concrete side pressure by an oblique member that connects a vertical member and a bottom plate member to a slug, and that three members are integrated and strengthened by a reinforcing member made of L-shaped steel. )