JPH0346639B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint plate for joining H steel forming a reinforcing ring of a liner plate for the purpose of reinforcing the inner wall of an excavated hole or the like.

(Prior Art) When digging a hole underground, such as when drilling a well, collapse or collapse of the inner wall of the excavated hole becomes a major problem.

The third conventional technique to solve this problem is
This will be explained with reference to FIGS. 4 and 5.

First, a method for reinforcing the inner wall surface of the excavated hole will be described with reference to FIG. 50 is a drilled hole and the inner wall surface 5
1, while excavating, a liner plate 52 formed of a galvanized iron plate having a substantially U-shaped cross section is stuck and fixed from the upper stage to reinforce the inner wall surface 51 and prevent it from collapsing or collapsing.

The liner plate 52 has a mounting portion 55
is attached to the inner wall surface 51 in a cross-sectional shape using an appropriate connecting means. At this time, reinforcing rings 54 for reinforcing the liner plate 52 are fixed at predetermined intervals to the mounting portion of the lowermost liner plate. Normal liner plate width is 50cm, one every 2m up to 10m deep, 1.5 up to 20m deep.
Arrange one reinforcing ring for every m, and one reinforcing ring for every 1 m for depths of 20 m or more.

The reinforcing ring 54 is formed by abutting the ends of H steel of appropriate length and bolting the joint plate 56 to form one ring.

FIG. 4 shows a top view of the connecting portion of the reinforcing ring.

FIG. 5 is a cross-sectional side view of the connecting portion of the reinforcing ring.

The hole side of the H steels 54a and 54b constituting the reinforcing ring is fixed to the joint plate 56a via bolts.
A joint plate 56b is fixed to the inner wall side with bolts. Therefore, it is necessary to provide holes in the flange portions of the H steels 54a, 54b that correspond to the bolt insertion holes of the joint plates 56a, 56b. When performing this work, before installing the joint plate 56b on the inner wall side, it is necessary to excavate the inner wall surface near the joint plate 56b to provide a work space as shown in FIG.

This is because in order to fix the joint plate 56b to the H steel, a space is required in which the hands and tools for tightening the bolts can be moved.

The liner plate 52 is fixed to the center of the H steel via bolts 53.

The liner plate is fixed on the upper side of the reinforcing ring 54 first. This is because if the lower liner plate is fixed first, it becomes impossible to fix the inner wall side joint plate.

Conventionally, a method has been used in which the reinforcing surface of the inner wall is formed by repeating the above-mentioned operations.

(Problems to be Solved by the Invention) However, the above-mentioned conventional techniques have the following problems.

The inner wall of the area where the reinforcing ring will be placed has to be excavated considerably in order to secure a working space.
The work is particularly difficult if there are stones or bedrock in the area to be excavated.

In addition, when fixing the joint plate on the inner wall side with bolts, especially when fixing the upper bolt, the work is extremely difficult because you must first insert your hand inside the upper flange of the H steel to insert the bolt. Moreover, there is a problem in that a space must also be secured for inserting the bolt into the upper flange portion by hand.

(Means for Solving the Problems) The present invention for solving the above problems has the following configuration.

That is, in a joint plate that connects a plurality of arc-shaped H steel pieces in a ring shape to form a reinforcing ring for a liner plate used to reinforce the inner wall of an excavated hole, etc., one end of the H steel It is formed in a hook-shaped hook part that can be hooked on the end edge, and the other end side is provided in an extension part extending from the hook part, and a sufficient number of hooks are provided on the extension part. It is characterized by having a through hole for inserting a bolt.

(effect) Next, the operation will be explained with reference to figures.

FIG. 1 shows a joint plate 10 according to the present invention.

Reference numeral 12 is a hook portion, and reference numeral 18 is a through hole for inserting a bolt.

FIG. 2 is a side view of the mounting state, and the hole-side joint plate 22 is a conventional plate-shaped joint plate that is fixed via bolts.

The joint plate 10 on the inner wall side connects the H steel by hooking the hooking part 12 to the upper flange of the H steel, and inserting a bolt into the through hole 18 and fixing it to the lower flange of the H steel. can be done.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First, the structure of the joint plate according to the present invention will be explained in detail with reference to FIG.

Reference numeral 12 denotes a hook portion having a hook-shaped cross section.
The width of the latching groove 14 may be appropriately selected depending on the width of the flange portion of the H steel to be connected, but it will be easier to install if the latching groove 14 is made a little wider, and it can be fixed by using a wedge described later.

The length of the hooking piece 16 may be appropriately selected depending on the width of the flange portion of the H steel to be connected. Reference numeral 18 denotes through-holes for bolt insertion, which are arranged in correspondence with the through-holes provided in the lower flange portion of the H steel, and are provided in a sufficient number. The length and width of the joint plate 10 are determined by taking into consideration the length, shape, etc. of the H steel to be connected.

Next, the attachment method will be explained in detail with reference to FIG.

When connecting the H steel that constitutes the reinforcing ring 20, the joint plate 22 on the hole side may be fixed to both the upper and lower flange portions of the H steel via bolts as in the conventional case.

The joint plate 10 according to the present invention is used to connect the inner wall side of the H steel, but before installation, it is necessary to excavate the part of the inner wall corresponding to the reinforcing ring 20 in order to secure a working space. . In this case, unlike the conventional method, if the joint plate 10 according to the present invention is used, the upper flange part of the H steel is not bolted, so the space and space required to hook the joint plate 10 to the upper flange part are not tightened. Excavate the working space necessary to secure the bolts to the lower flange.

First, the hooking portion of the joint plate 10 is hooked to the upper flange portion of the H steel through the space excavated as described above. The connecting portion of the H steel is positioned at the center of the joint plate 10 and the through hole for bolt insertion corresponds to the through hole for bolt insertion in the lower flange portion of the H steel.

Next, a bolt is passed through the through hole, and a fixing operation is performed using the working space for fixing the bolt.

The liner plate 24 is installed from the top first, as in the conventional method.

When the hook part is hooked to the flange part of H steel, the width of the hook groove of the hook part is wider than the width of the flange part, which may cause a gap and wobble. All you have to do is type. In that case, when the bolt that tightens the lower flange of the H steel is tightened about halfway, drive a wedge into the gap and fix it.
The bolt may be further tightened to secure it.

As described above, by using the joint plate according to the present invention, the space required for the series of operations for fixing the inner wall side joint plate, which was the most difficult task when forming the reinforcing ring, is narrower than before, and H Since the work of inserting and tightening bolts into the upper steel flange part can be omitted, working time can be shortened and work can be made easier, and work efficiency can be improved.

Therefore, in excavation work, internal reinforcement has been carried out by conventional methods, and the present invention can provide an innovative joint plate and working method in this field.

Although various preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. You can also use H as the bonding material.
Of course, many modifications can be made without departing from the spirit of the invention, such as not being limited to steel.

(Effects of the Invention) According to the present invention, the work of excavating the working space, which is the biggest problem in the work of attaching the joint plate on the inner wall side that is fixed to the connection part of the reinforcing ring, can be reduced compared to the conventional work. Part of the bolt fixing work can also be omitted, which has the remarkable effect of enabling more efficient work.

[Brief explanation of drawings]

Fig. 1 is an external view of the joint plate according to the present invention, Fig. 2 is a cross-sectional side view of the part of the joint plate according to the present invention attached to H steel, and Fig. 3 is a liner plate and reinforcing ring attached to the drilled hole. Figure 4 is a plan view of the connecting part of a conventional reinforcing ring, and Figure 5 is a cross-sectional side view of a conventional joint plate attached to an H steel. . 12...Latching portion, 18...Through hole.

Claims (1)

[Claims] 1. In a joint plate that connects multiple pieces of arc-shaped H steel in a ring shape to form a reinforcing ring for a liner plate used to reinforce the inner wall of an excavated hole, etc., one end is connected to the end of the H steel. It is formed in a hook-shaped hook part that can be hung on the edge, and the other end is provided in an extension part extending from the hook part, and a sufficient number of hooks are provided on the extension part. A joint plate for a ring for reinforcing a liner plate, characterized by having a through hole for inserting a bolt.