JPH0481005B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field The present invention relates to a method for connecting liner plates for preventing landslides on the inner surface of a hole dug in the soil, earth retaining, and other earth wall surfaces. .

BACKGROUND TECHNOLOGY For example, when a hole must be dug deep into the ground, such as a vertical shaft, it is necessary to proceed with the digging while fixing a liner plate to prevent the inner surface from collapsing. Since the liner plate cannot have the same diameter as the hole to be dug, it is necessary to connect curved plate-shaped liner plates to cover the entire inner surface of the hole. The same applies not only when digging holes but also when covering other earthen walls.

As shown in FIG. 8, the conventional liner plate 1 has a structure in which a flange 3 is formed around the main body 2, and a large number of holes 4, 4, . . . are bored in the flange 3. Normally, the main body 2 uses a corrugated plate, but is not limited thereto. The reason why the flange 3 is formed around the periphery and holes are provided therein is because the flange 3 is used as a flange to connect adjacent liner plates with each other with the bolts 5.

Problems to be solved by the invention As mentioned above, in the case of the conventional liner plate,
The flange 3 provided on the periphery had to be used as a flange for connection with bolts 5. The same applies to the case of connecting in the downward direction. Therefore, especially when connecting downward, someone must support the connection while fixing it with bolts. Since this work is difficult, the present applicant previously proposed a method in which the upper and lower ends of the liner plate were bent into a U-shape and hooked onto each other (Utility Application No. 11870, 1983).
Naturally, the flange 3 is not provided on the liner plate.
Therefore, it is desirable to connect the left and right ends without providing the collar 3. However, this liner plate had to be connected with its outer side facing the soil surface, so it was difficult to connect it without using a flange like the conventional ones. An object of the present invention is to overcome such difficulties and provide a method for connecting liner plates that can be easily connected only from the inside.

[Structure of the Invention] Means for Solving the Problems The present invention is characterized by the use of bent bolts, in which a plurality of holes are formed at the end of the liner plate, and the holes are A joint plate with matching holes is applied from the inside so as to span the ends of both liner plates, and the bent bolt is inserted through one hole to form a thread in the other adjacent hole. It was made to stick out, and then a nut was attached to the thread of the screw to secure it in place. Therefore, the bolt used is bent into a shape that allows its ends to be inserted into two adjacent holes.

Example Figure 1 shows a liner plate 1 used in the present invention.
0 is a perspective view of an example of a corrugated body 11, in which a plurality of holes 12 are provided in a row at regular intervals at each end of a corrugated body 11. The holes at both ends are drilled into the ridges of the corrugated sheet. The undulating peaks and troughs are relative, but in this specification they mean the state seen from the side of the worker. In this embodiment, the main body 11 is made of a corrugated plate, but it is not limited to a corrugated plate. Further, since it is for fixing the inner surface of the hole, the entire shape is curved, but it may be in the form of a flat plate depending on the purpose.

The upper and lower edges of this main body 11 are bent into a U-shape to form an engaging portion 13. This is for connecting another liner plate 10a in the vertical direction by hooking and suspending it by this engaging portion 13, as shown in FIG. The shape of this engaging portion 13 is arbitrary.

The one shown in Fig. 2 is the joint plate 1 used in the present invention.
5, and is configured so that it can be mounted on the main body 11 using a narrow corrugated plate having the same pitch as the main body 11. Holes 16 and 17 are formed on both sides of the joint plate 15 so as to correspond to the hole groups described above, and are arranged in a row. As shown in FIG. 1, when the joint plate 15 is placed on the end of the main body 11, the holes 16 are made to coincide with the holes 12 of one hole group of the main body 11, respectively. The other hole 17 is made to coincide with the hole 12 of another liner plate aligned with this liner plate 10.

It is desirable that the number of holes 12, 16, 17 in these hole groups is an even number.

This liner plate 10 is fixed to the inner surface of the hole dug, but when connecting horizontally, one liner plate 10 is lined up with another liner plate, and the joint plate 15 is inserted into the hole 16 at the joint. 1
7 are placed so as to match the holes of both liner plates 10, and bolts 20 (FIG. 4) are passed through these holes and fixed.

The bolt 20 used is one bent as shown in the figure. Basically both arms 21 and bottom 2
The tip 23 of one arm is threaded, and the other end 24 is bent into a U-shape having a hole 12.
The head has a shape that prevents it from slipping in. The distance between both arm portions 21, 21 is equal to the distance between the two adjacent holes. The shape of this bolt 20 is such that the tips of both arms protrude from the hole, one is provided with threads, and the other is designed so that it does not come out from the hole, and the end 23 provided with threads is inserted into the hole. The middle part can be bent in any way as long as it can be pulled out from the other hole. In addition, the head is the tip 2 of the arm 21 in this embodiment.
4 is further bent 90 degrees to create a shape that prevents it from coming out of the hole, but a normal bolt head shape will do as well. For example, the shapes shown in FIGS. 6 and 7 may be used.

When connecting using bolts 20, as described above, arrange the joint plate 15 so that both holes match the joint of adjacent liner plates 10, and hold the end 24 of the bolt 20 to tighten the screw thread. It is sufficient to insert the end portion 23 having a diameter into one hole, adjust it by hand, take the end portion 23 out of the other hole, and tighten the nut 25 on the thread. Bottom 22 of bolt 20
is applied to the valley 14 of the main body 11, which serves as a fulcrum, and even if the nut 25 is tightened at only one place, the nut 25 can be securely tightened and fixed. That is, the liner plate 10 can be connected and fixed with the bolts 20 without forming a flange as in the conventional case.

FIG. 5 shows another example of the liner plate 30, in which the engaging portions 31 connected in the vertical direction are formed to face in the vertical direction, and other aspects are the same as those described above. Furthermore, when connecting flat liner plates that are not corrugated plates using this method, protrusions must be formed between the holes 12.

〔Effect of the invention〕

As described above, in the present invention, holes are provided at the ends of the liner plate, and the bent bolt is passed from one hole to the other by applying the joint plate, so there is no need to provide a flange at the end of the hole. It is possible to connect the liner plates only from one side, such as the inside.

[Brief explanation of drawings]

Figures 1 to 7 show examples related to the method of the present invention, in which Figure 1 is a perspective view of liner plates to be connected, Figure 2 is a perspective view of a joint plate, and Figure 3 is a perspective view of the liner plates in the vertical direction. Side view showing connection, 4th
The figure is a side view showing the state of installation with bolts,
The figure is a side view of another liner plate, Figures 6 and 7 are plan views of other different bolts, and Figure 8 is a side view of another liner plate.
The figure is a perspective view of a conventional liner plate. 10: liner plate, 11: main body, 12,
16, 17: hole, 20: bolt, 21: arm, 2
2: Bottom.

Claims (1)

[Claims] 1 Liner plates having hole groups consisting of a plurality of holes at both ends are lined up with their ends touching, and a joint plate having two groups of holes corresponding to the hole groups at both ends is placed between one group of holes and one liner. The holes of the other group are arranged in the hole group of the plate so as to correspond to the hole group of the other liner plate, and one end of the head is shaped so that it cannot pass through the hole, and the other end is a screw thread. and a bolt bent so as to be inserted across two adjacent holes of the first group of holes, and a nut attached to the screw thread thereof, and from the threaded end of the bolt. A method for connecting liner plates, which comprises inserting the bolt into one of the two holes, passing it through the other hole, and tightening a nut onto the thread at one end of the bolt passed through the hole.