JPS5828027Y2 - Earth retention brace - Google Patents

Description

[Detailed description of the invention] The present invention relates to an earth retaining support suitable for use in earth retaining work for the excavated earth wall portion during earth excavation work such as burying water and sewage pipes or underground electrical installation work. be.

Conventionally, there are many types of supporting equipment, and there are also various methods of earth retaining work.

Common construction methods include, for example, using wooden boards or driving sheet piles.

However, in any of these construction methods, the earth retaining supports used in them have drawbacks in terms of strength and handling, and sheet piles, etc., have strong noise and vibration when driven, especially in urban areas and residential areas. There are some difficulties in carrying out these works in such areas.

This invention was developed in view of these circumstances,
It consists of a rectangular iron seating plate with a length of 3M and a height of 1M and a strut that can be expanded and contracted from 1M to 3M in trench width. Using struts, support the struts by touching both ends or the center of the plate, stack the plates according to the depth of the trench, and connect the iron parts with screws, etc. to ensure against tension and bending loads. This earth retaining support has a long product life and enables safe, noiseless, vibration-free and unskilled earth retaining work by forming a seating box with a trench width of up to IM depth of 6M. is to provide.

Hereinafter, the embodiments of the present invention will be explained with reference to the attached drawings.
generally indicates a seating plate, 2 is a horizontally long, almost rectangular iron plate, and this iron plate 2 is arranged vertically, with channel-shaped supports 3 at both sides and longitudinal ends.
Weld and install 3 vertically.

Further, on both the upper and lower parts of the iron plate 2, there are formed edge portions 4.4 which have a horizontal surface on the upper surface side and a sloped surface on the lower surface side, and are almost step-like.

A plate-shaped reinforcing material 5 is vertically welded to the central part of the iron plate 2, and its upper and lower ends 5 are welded to the edge parts 4, respectively.

Reference numerals 6 and 6 denote strut receivers, and the front faces of the strut receivers 6, 6 are square, rectangular insertion holes 7, 7 are bored in the center, and the side faces are triangular plates. The edge portion 4
, 4 is welded to the lower side of the left and right center portions.

8, 8 is a connecting piece welded to the upper end of the pillars 3, 3. This connecting piece 8.8 is a connecting piece 8.8 that connects the pillars 3, 3 to other pillars 3, 3 formed by stacking the seating plates 1. 3
, 3, and its sides are formed obliquely so as not to obstruct the slope of the edge portion 4, and above its surface there is a hanging opening for pulling out the rectangular seating plate 1. 9, 9 is drilled, and a bolt hole 10 is provided below it.
．． 10.

Further, a plurality of insertion holes 12.12 are formed at predetermined intervals in the front surfaces of the pillars 3, 3, and bolt holes 11.11 are formed in the lower ends thereof.

Reference numeral 13 denotes a cutten bushing attached to the lower end of the support column, the tip of which is formed into a sharp part 14, and a threaded hole 15 for a bolt for attaching the cutten bushing 13 to the support columns 3, 3 is bored in its front part. This is what is being done.

Reference numeral 16 denotes a telescopic strut, the main body of which is a pipe-shaped shaft 17 provided with coarse pitch threads on its outer circumferential surface, and the shaft 17.
a pipe-shaped receiving shaft 23 into which the receiving shaft 23 can be inserted;
A handle part 24 is loosely fitted into the end of the handle part 24 and is screwed onto the shaft 17.
It consists of.

A crimp piece 18.18 is welded to both ends of the main body, that is, the right end of the shaft 17 and the left end of the receiving shaft 23 in FIGS. Attach rubber buffer 19.19.

The crimping piece 18.18 and the rubber buffer 19.19 are provided with communicating holes, and the ends of the shaft 17 and the receiving shaft 23 near the crimping piece 18.18 are provided with a cotter 20, which will be described later.
Drill a hole for driving and inserting the screw.

21 is a connecting metal fitting, the head of which is a T-shaped hook piece 22
The legs are rod-shaped with a hole drilled at the tip, and the crimp pieces 18 and 18 and the rubber buffer 19
．． It is formed so that it can be inserted into the shaft 17 or the receiving shaft 23 through a hole drilled in the shaft 19 .

Reference numeral 20 denotes a connector, which is inserted in a skewer-like manner through a hole drilled in the shaft 17 or the receiving shaft 23, respectively, and a hole in the connecting fitting 21 to connect the connecting fitting 21 to the shaft 17 or the receiving shaft 2.
3, respectively.

Next, the above operation will be explained. First, the length of the strut 16 is adjusted so that it almost matches the width of the trench mouth dug in the earth excavation work described above.

That is, by rotating or counter-rotating the handle portion 24 of the strut 16, the shaft 17 moves in and out of the receiving shaft 23, and thus the strut 16
The entire length of can be expanded or contracted.

Next, connect the connecting fittings 21 to the pillars 3 of the seating plate 1.
3 into the insertion holes 12, 12.

That is, the hooking piece 22 of the connecting fitting 21 is inserted into the inner surface of the insertion hole 12 and rotated to be hooked.

Then, insert the leg of the connecting fitting 21 hooked into the insertion hole 12 into the hole connected to the crimp piece 18.18 and the rubber buffer 19.19 provided at the end of the strut 16 adjusted above. With the legs inserted into the shaft 17 or the receiving shaft 23, the socket 20.20 is inserted into one hole of the shaft 17 or receiving shaft 23 and one hole of the connecting fitting 21 in a skewered manner.

Thus, the strut 16 is fixed to the seating plate 1.

The struts 16 are arranged at right angles to the plane of the seating plate 1.

Next, the other seating plate 1 is placed at the other end of the strut 16 so as to face it in parallel, and the other end of the strut 16 is inserted into the insertion holes 12, 12 of the corresponding strut 3.3. Fix it in exactly the same way.

Normally, two struts 16 are used for the two seating plates 1, but when the strut 16 is used for the strut receiving part 6 in the center of the seating plate 1, only one strut is used. good.

If the connecting fittings 21 are installed in the insertion holes 12, 12 of the seating plate supports 3.3 in this way, the struts 1
The blade-shaped handle 24 at 6 is rotated to extend the shaft 17 to create a tensioned state between the seating plates 1 and connect the seating plate 1 and the strut 16.

If the graben is deep, the columns 3, 3 of another seating plate are placed on the connecting pieces 8, 8 welded to the upper part of the columns, and the bolt holes 11 and 11 in the columns 3, 3 are connected to the connecting pieces. The bolt holes 10 and 10 at 8 and 8 are aligned, and the bolts 26 are screwed in, and the seating plates are assembled by stacking them.

The connecting pieces 8, 8 at the top of the seating plate supports 3, 3 assembled according to the depth of the graben in this way
Hooks of wire ropes 25 are hung through the hanging ports 9, 9 provided in the tray, and the assembled seating plate is placed in the trench.

Note that 27 is a clay pipe for a sewer or the like. Next, we will explain the construction method using the brace of the present invention.

For example, as shown in FIGS. 4A, B, and C, a seating plate is first assembled near the trench mouth.

If assembly is performed by stacking, bolts are screwed into the bolt holes 10, 10 in the connecting pieces 8, 8.

After that, the struts 16 are stretched and placed into the graben (Fig. 4A).

Next, as shown in FIG. 4B, in the case of burying a sewage pipe, etc., the sewage pipe 27 and the like are installed by removing the strut 16 at the lower part where the piping is to be installed.

Then, after backfilling to a certain extent, the earth retaining sheeting plate is pulled out from the top of the unit and backfilling and foot protection are repeated to complete the burial work (Figure 4C).

In addition, if the graben is particularly deep or if it is difficult to pull out the upper part of the seating plate unit that is holding the earth in place due to the soil quality, it should be buried to the extent shown in Figure 5A and then the seat plate unit at the bottom of the earth retention plate should be removed. Remove the struts of the seating plate, fold the seating plate inward one side at a time, lift it up and solidify it, and repeat this action until it is possible to pull out the seating plate from the top.

Since the present invention uses the above-mentioned method of excavation, earth retaining can be carried out over a large area with simple operations, and it can be quickly and smoothly erected and recovered in accordance with all types of soil.

Also, as shown in Figure 7A, backfill with earth and sand to a depth of about 50 to 70 cm, and remove and remove the lowest strut from the plate.

If you remove this bottom strut, it will cost an additional 50~70 c.
Backfill the area by approximately 1.5 m and remove the next strut.

Repeat this operation to remove up to the top strut (Figure 7B).

Once all the struts have been removed in this way, the seating plate on one side is pulled out using a crane (Fig. 7C), and the seating plate on the opposite side is also pulled out in the same manner for plate recovery and burial work. complete.

Moreover, one backhoe or crane is sufficient for erecting and recovering the seating plate and the seating plate unit.

Furthermore, since the strut of the present application has rubber cushions on both ends, it will not damage the contact surface with the seating plate, and even if the strut and strut do not contact at right angles, It is supported by a rubber cushion with the same effect as if it were mounted at right angles, and can be tensioned in response to changes in the angle of the seating plate unit.

Further, since the retaining plate can be formed by stacking seating plates of the same shape and size, it can be installed and recovered efficiently and is also economical.

Furthermore, since the upper and lower portions of the seating plate are provided with stair portions, this portion can be used in place of a ladder for climbing and descending.

Also, by attaching a cutten bushing to the lower end of the seating plate support, placing the seating plate into the graben, and pushing the seating plate downward, it is possible to bury the lower part of the seating plate into the soil. becomes.

Therefore, even if the trench has not been completely excavated, by using the cutting bush as described above, it is possible to set the seating plate at the desired position within the trench.

[Brief explanation of the drawing]

Figure 1 is a slope view of the seating plate, Figure 2 is a side view showing a section of a part of the strut, Figure 3 is a plan view of Figure 2, Figures 4, 5, and 6. FIG. 7 is an explanatory diagram of a case where a seating plate and a strut are combined and installed in the soil. Explanation of symbols 1 is seating plate, 2 is iron plate, 3
is the column, 4 is the edge part, 51 is the reinforcing material, 6 is the strut support part,
7 is an insertion hole, 8 is a connecting piece, 9 is a hanging port, 10.11 is a bolt hole, 16 is a strut, 17 is a shaft, 18 is a crimping piece, 19 is a rubber buffer, 20 is a connector, 21 is a connecting fitting , 23
is the receiving shaft.

Claims (1)

[Scope of utility model registration request] Supports 3,
3 is fixed, and a plurality of insertion holes 12 are provided in the front of the pillars 3, 3.
. A seating plate 1 having a connecting piece 8.8 fixed to the upper end of the pillar 3.3 that fits the width of the pillars 3, 3, a shaft 17 with a thread formed on the outer circumferential surface, and a shaft 17 inside Pipe-shaped bearing shaft 2 that can be inserted into
3, a handle portion 24 rotatably screwed onto the shaft 17 is loosely fitted to the end of the receiving shaft 23, and heads are provided at both outer ends of the connected shaft 17 and the receiving shaft 23. A strut 16 having a T-shaped hook 22 and a strut 16 removably attached to the insertion holes 12, 12 with connecting fittings 21 that can be hooked. .