JPS5851091B2 - Earth retention shoring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earth retention shoring method for civil engineering construction work such as trench excavation.

Civil engineering construction work such as concrete pipe burying work and box culvert burying work requires trench excavation work, and the excavated trench requires earth retaining support.

The conventional method commonly used for this earth retention support is to arrange rails at intervals on both sides of the trench to be excavated.
This rail supports an earth retaining panel, and this earth retaining panel secures the sides of the ditch.

A rod-shaped support is disposed between the opposing rails to maintain the opposing spacing between the rails.

The earth pressure on the sides of the trench is first transmitted to the earth retaining panel, from the earth retaining panel to the rail, and further from the guide rail to the support.

In this earth retention shoring construction method, the earth retention shoring device itself is not easy to assemble and disassemble, which not only prolongs the work period and increases construction costs, but also increases the depth of the trench as the trench excavation work progresses. When the earth retaining support position changes in the horizontal direction, it is not easy to displace the earth retaining panel in accordance with this change, which also causes an extension of the work period.

This invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide an earth retention shoring method that allows earth retention shoring work to be carried out easily and quickly.

Corresponding to this purpose, the earth retaining shoring method of the present invention consists of two earth retaining panels located opposite and parallel to each other, four parts are pivotally connected to one earth retaining panel, and the other end is pivotally connected to the other earth retaining panel. An earth retaining shoring device equipped with a plurality of supports located parallel to each other and a safety cable stretched between two earth retaining panels is placed in a trench that is being excavated or within an excavated trench to perform earth retaining of the trench. It is characterized by

The details of this invention will be explained below with reference to the drawings showing one embodiment.

As shown in FIG. 1, in the earth retaining shoring method of the present invention, earth retaining is carried out on the side surfaces s and b' of the groove a by means of an earth retaining shoring device 1.

As shown in FIGS. 1, 2, and 3, the earth retaining support device 1 includes two earth retaining panels 2a, 2b and four mounting members 3a.
, 3b, 3c, 3d, and four replacement supports 4a,
4b, 4ct 4d, and four safety ropes 5a, 5b,
5c and 5d.

The retaining panels 2a, 2b are located on both sides of the trench to be excavated, and should be located parallel to and opposite each other.

The attachment members 3a and 3c are vertically located and fixed to the inner surface of the retaining panel 2a at intervals in the width direction of the retaining panel (the length direction of the groove).

On the other hand, the attachment members 3b and 3d are vertically located and fixed to the inner surface of the retaining panel 2b at intervals in the width direction of the retaining panel.

The attachment members 3 a p 3 b, 3 c and 3 d each have a channel-shaped cross section and are fixed to the retaining panel by their respective webs.

The spacing between the mounting members 3a and 3c is equal to the spacing between the mounting members 3b and 3d, and the mounting members 3a and 3b face each other, and the mounting members 3c and 3d face each other.

The four replacement supports 4a, 4b, 4c, and 4d each consist of a rigid rod-shaped or cylindrical main body 6 and a tip fitting 7 attached to both ends of the main body 6, and the tip fitting 7 is attached to the mounting members 3a to 3d. Pivotally attached by fixation or pin.

By replacing these supports 4a to 4d with ones of different length, the overall length of supports 4a to 4d can be changed arbitrarily, and therefore the spacing between the earth retaining panels 2a and 2b can be adjusted. can.

On the other hand, each mounting member 3a to 3d has a bracket) 9.
a, 9b are provided, and this bracket) 9a, 9b
The tip of any one of the safety cables 5a to 5d is locked to.

Each safety rope is composed of a string-like main body 11, a chain 12 of a plurality of continuous links attached to one end of the main body 11, and a locking metal fitting 13 attached to the other end of the main body 11.

The safety cables 5a to 5d are passed diagonally between the upper bracket (9a) and the lower bracket (9b) between the opposing mounting members 3a and 3d, and the chain 12 at one end of the safety cable is connected to the upper bracket (9a) of the mounting member. ) 9a, and the locking metal fitting 13 at the other end is locked to the lower bracket () 9b of the opposing mounting member.

The length of the safety rope can be adjusted by selecting the link of the chain 12 that is engaged with the bracket 9a.

When assembling the earth retaining support device 1 configured in this way, the inner side (opposing surface) of the earth retaining panel 2a is placed facing upward, and the supports 4a to 4d and safety cables 5a to 5d are attached.

Next, this retaining panel 2a is hung flat with the inside facing downward to approach the other lower retaining panel 2b, and the support is connected to the mounting member of the retaining panel 2b, and the safety cable is also locked to the mounting member.

In this way, the earth retaining shoring device including the earth retaining panels 2a and 2b becomes box-shaped and becomes a safe self-supporting earth retaining shoring device.

The earth retaining support device, which has been assembled in this way, can be made to stand on its own on the spot, or it can be hung into an excavated trench using a hanging fitting to make it stand on its own.

The earth retention shoring method of the present invention uses the earth retention shoring device 1 constructed and assembled as described above.

In principle, in places with good geology, the earth retaining support device 1 is assembled and then dropped into a pre-excavated trench.

For positioning and stability, use a panel protector and press-fit it slightly to minimize the difference in height between the left and right sides.

In this state, earth retaining equipment is used to retain the earth and the trench is excavated.

After the trench excavation work at various important points is completed, piping and wiring will be installed, and after the land is filled, the earth retaining support device will be pulled out.

For this purpose, hang the panel hangers at four points and pull out the retaining panel parallel to both sides.

Before removing the earth retaining panel, remove one of the locking parts of the safety cable, remove the hanging fitting on the opposite side, and lift it up 1"1! to form a folded position as shown in Figure 4.

To move the shoring device to another location, if the distance to be moved is short, it can be transported in the folded state shown in Figure 4, or if the distance to be transported is long, it can be transported by using the earth retaining panel. , supports, safety ropes, etc. will be disassembled and transported.

During use of the earth retention shoring device 1, if it is necessary to connect adjacent earth retention shoring devices for safety, as shown in Fig. 3, the connecting rail 14 is cleared and installed, 14 to connect adjacent retaining panels or to position the ends.

Next, in the case of earth retention for trench excavation in places with unstable geology, do as shown in Figure 5.

1. First, excavate a groove a/ to a depth that does not cause the risk of soil collapse, and erect the assembled earth retaining support device 1 into this groove a/.
Next, dig the groove a' and push down the earth retaining panel 2a at point h 1. Further dig the groove a/ and push down the earth retaining panel 2b at point i. Repeat this operation to lower the earth retaining panel 2a to j. The earth retaining panels 2a, 2 on both sides are pressed down alternately, like a bracket.
b on each side of the mounting members 3a, 3c or mounting member 3b.
, 3d and exchange support 4a, 4b, 4c and 4d.
By swinging around the pivot point and pushing in alternately, earth retention can be supported at the optimum earth retention support point.

In this case, the pushing operation can be easily performed by loosening one or two links of the chain of the safety rope.

As is clear from the above description, according to the present invention, it is possible to obtain an earth retention shoring construction method that allows earth retention shoring work to be easily and quickly performed at the optimum earth retention shoring location.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an earth retaining shoring method according to an embodiment of the present invention, FIG. 2 is a side view of the earth retaining shoring device shown in FIG. 1,
FIG. 3 is a plan view of the earth retention shoring device shown in FIG. 1, FIG. 4 is a front view showing the earth retention shoring device in a folded state, and
The figure is a front explanatory view for correcting the earth retaining shoring method according to another embodiment of the present invention. 1...Earth retention support device, 2a, 2b...
Earth retaining panel, 3a-3d...Mounting member, 4a-
4d...Support, 5a-5d...Safety rope, 8...Pin, 9a, 9b...Bracket, 14...Connection rail.

Claims (1)

[Scope of Claims] 1. Two earth retaining panels facing each other and located in parallel, one end of which is pivotally connected to one of the earth retaining panels, the other end of which is pivotally connected to the other earth retaining panel, and located parallel to each other. The method is characterized in that an earth retaining shoring device equipped with a plurality of supports and a safety rope stretched between two of the earth retaining panels is positioned in a trench in the middle of excavation or in an excavated trench to retain earth in the trench. Earth retention shoring method. 2 Adjusting the length of the safety rope and moving the two earth retaining panels alternately in the depth direction of the groove according to the excavation of the groove within the range allowed by the safety rope to perform earth retaining. An earth retention shoring method according to claim 1, characterized in that: