JPS6011164Y2 - Construction equipment for earth retaining method at right-angled bends in excavated trenches - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a construction device for an earth retaining method at a right-angled bend in an excavated trench.

Recently, when excavating trenches for burying water, sewage, gas, etc. piping, telegraph and telephone cables, power transmission lines, etc., in order to prevent the side walls of the trench from collapsing, the excavated trench is dug as shown in Figure 1. support columns 4 that are erected and press-fitted facing each other at regular intervals along the inner wall of 1, have guide grooves 2 on both sides, and have a connecting member 3 vertically on the front; and supports that maintain the spacing between the opposing columns 4. An earth and sand construction method is being constructed in which an earth retaining structure 7 is assembled and connected in the longitudinal direction of the excavated groove 1 from a jack 5 and an earth retaining plate 6 fitted and stretched between the guide grooves 2 of each support 4. .

By the way, there is no problem with this earth retaining method when the excavated trench 1 goes straight, but in order to bend the direction of burying water, sewage, gas, etc. piping, telegraph and telephone cables, power transmission lines, etc. at right angles, the excavated trench 1 is bent at right angles. When the excavation direction is bent at right angles, it is not possible to assemble and connect the earth retaining structure 7 along the inner wall of the right angle bend, so there is no choice but to interrupt at the right angle bend.

For this reason, earth retaining at the right-angled bent portion of the excavated trench 1 is conventionally done by placing H piles 8 in the soil at intervals of about 1.577L along the inner wall of the large corner and the inner wall of the protruding corner of the right-angled bent portion 1a, as shown in Fig. 2. Press-fitted and installed
Insert a horizontal sheet pile 9 between the flanges of this H pile 8 (or drive a steel sheet pile), and erect an H-beam steel backing 10 on the inner surface of the H pile 8, and set the interval between the opposing uprights 10. A strut 11 is installed to hold it in place, and a steel rod 1 is installed on the raised corner 10 on the projecting corner side.
2 is hanging.

However, in this earth retaining method for the right-angled bent portion 1a of the excavated trench 1, the earth retaining structure 7 described above cannot be used at all, and the preliminary materials must be procured separately, which increases costs and makes assembly difficult. Therefore, construction takes time and is extremely inefficient.

The present invention was developed in view of the above circumstances, and provides a construction device that can assemble and connect earth retaining structures along the inner wall of a right-angled bent part of an excavation trench, thereby allowing the earth retaining method to be continued without interruption. This is what we are trying to construct.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a construction device for earth retaining construction at a right-angled bent portion of an excavated trench according to the present invention will be described below with reference to the drawings.

As shown in FIG. 3, struts 4 having guide grooves 2 on both sides and vertically connecting members 3 on the front face are press-fitted at regular intervals along the inner wall of the excavated trench 1, which extends straight ahead. Support jacks 5 are stretched over the connecting members 3 of these opposing columns 4 to maintain the spacing between the columns 4, and between the columns 4 in the longitudinal direction of the excavation groove 1 are earth retainers having guide rollers 6a on both end surfaces. In this earth retaining method, the plate 6 is stretched by fitting its guide roller 6a into the guide groove 2 of the support column 4, and the earth retaining structure 7 is assembled and connected in the longitudinal direction of the excavated groove 1. For example, when the excavation trench 1 is bent at right angles to the excavation direction as shown in the figure, in order to bend the sewer pipe at right angles to the buried direction, the right-angled bent portion 1a, that is, the end of the excavation trench 1, is The construction device of the present invention is erected and press-fitted into the soil at the end of an excavation trench 1 that is running straight, facing away from a support 4 immediately in front of it at a distance of approximately the width of the trench, and is installed by a support jack 5. The connecting members 3 on the front side of the columns 4 are fitted and fixed to the outer surfaces of the columns 4 where the distance is maintained, and the connecting members 3 are installed and press-fitted adjacent to each other at right angles as shown in FIGS. 4a and 4b. It fits into the guide groove 2 on the outer surface, and the mouth edge 2
A connection plate 15 with a hat-shaped cross section that locks on a
In order to connect the support column 4 on one side, shown in FIG. It fits in and locks onto the opening edge 2a.

A connector 17 is formed by connecting two connection plates 16 with a dish-shaped cross section back to back with a set screw, and the support 4 on one side immediately in front of the end of the excavated groove 1 is press-fitted vertically adjacent to the back of the support 4. In order to connect the supporting columns 4 to each other, as shown in FIG. It is something that

Next, when the construction device bends the excavation direction of the excavation groove 1 at right angles, the right-angled bent portion 1a is the end of the excavation groove 1.
The earth retaining method for assembling and connecting the earth retaining structure 7 to the inner wall of the building will be explained based on the drawings.

Once the excavated trench 1 has been excavated straight to the required position as shown in FIG. It is press-fitted vertically into the soil, and the spacing is maintained using support jacks 5.

Next, set screws are inserted into the guide grooves 2 on the end wall sides of the excavated grooves 1 of the opposing columns 4, as shown in FIGS. 4a and 4b. A connection plate 15 having a hat-shaped cross-section fixed at is inserted, and another support 4 is connected to the end support 4 adjacent to it at a right angle, and the connection plate 15 is press-fitted into the ground.

Next, retaining plates 6' having a short width are installed between the guide grooves 2 of another support 4 connected to the end support 4 adjacently, and between the guide grooves 2 of the end support 4 and the support 4 immediately before it, as shown in FIG. The end of the excavated groove 1 is secured by fitting and tensioning.

Then, as the end of the excavation trench 1 is excavated to the required depth, each support 4 and retaining plate 6' are pressed deeper into the soil, and the respective supports 4 and retaining plate 6' are loaded and connected on top of them. .

When the excavation of the end of the excavation groove 1 is completed, the open guide groove 2 of the support 4 is connected to the support 4 at the end of the excavation groove 1' which is bent at right angles, and is erected next to the support 4. Inside,
As shown in FIG. 4, a connection plate 16 having a dish-shaped cross section is fitted on one side of the connector 17.

Then, the opening edge 2a of the guide groove 2 on one side of another support column 4 is fitted between the two connection plates 16 of this connector 17, and the support columns 4 are connected side by side and press-fitted into the ground.

Also, as shown in FIG. 4C, a connection plate 18 with a dish-shaped cross section is fixed back to back with a set screw on the back side of the column 4 immediately in front of the terminal column 4 so as to face this, and the back surface of the column 4. In between, the opening edge 2a of the guide groove 2 on one side of another support column 4 is inserted, and the support columns 4 are connected side by side and press-fitted into the soil.

The distance between this support 4 and the opposing support 4 is maintained by a support jack 5.

Next, remove the short retaining plate 6' from the end of the excavated groove 1, and excavate the groove 1' from this part in a perpendicular direction. As shown in FIG. 3, a guide roller 6a on one side of each retaining plate 6 of a normal width is inserted into the guide groove 2 in which the retaining plate 6 is located, and each retaining plate 6 is bent at a right angle to form a groove 1. ’ along the inside wall.

Next, the guide roller 6a at the other end of each retaining plate 6 is fitted into the guide groove 2 on one side of the support column 4, and the retaining plate 6 is press-fitted into the soil.
The spacing is maintained using the support jack 5.

Thereafter, this process is repeated one after another. In this way, the earth retaining structure 7 is assembled and connected to the inner wall of the right-angled bent portion 1a, which is the layer end of the excavated groove 1, and the earth retaining structure 7 is assembled and connected, and the earth retaining method using the earth retaining structure is interrupted. It will also be installed on the inner wall of section 1'.

Therefore, the sewer pipe can be bent at right angles and buried without any problem.

As described in detail above, according to the construction device of the earth retaining method for the right-angled bend of an excavated trench according to the present invention, when the excavation direction of the excavated trench is changed to the right-angled direction, the inner wall of the right-angled bend at the end of the excavated trench is It is possible to completely retain the earth by assembling and connecting the earth retaining structure along the right angle bending part, and further, by assembling and connecting the earth retaining structure along the inner wall of the trench that is excavated in the perpendicular direction from the earth retaining structure at the right angle bend, that is, by the earth retaining structure. Since the earth retaining method can be constructed continuously without interruption, it is easy to work with, improves construction efficiency, and greatly contributes to shortening the construction period.

In addition, in this invention, the construction equipment consists of three members: a connection plate with a hat-shaped cross section, a connector that connects the connection plates with a dish-shaped cross section back to back, and a connection plate with a dish-shaped cross section, so the cost required for this is reduced. is insignificant.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an earth retaining method using an earth retaining structure for trench excavation, Figure 2 is a plan view showing a conventional earth retaining method at a right angle bend in an excavated trench, and Figure 3 is a perspective view showing a conventional earth retaining method at a right angle bend in an excavated trench. Plan view showing the earth retaining method using the construction device according to the present invention, No. 4
Figure a is an enlarged plan view of part A in Figure 3, Figure 4 is B in Figure 3.
FIG. 4C is an enlarged plan view of section C in FIG. 3. 1... Excavation groove, 1a... Right angle bent part of the excavation groove, 1'... Excavation groove bent in the right angle direction,
2...Guiding groove of the pillar, 2a...Opening edge of the guide groove, 3...Connecting member, 4...Strut, 5...・Support jack, 6...
Earth retaining board, 6'...Short width earth retaining board, 6a...
... Guide roller, 7 ... Earth retaining structure, 15
...Connection plate with a hat-shaped cross section, 1
6, 18...Connection plate with dish-shaped cross section, 17...Connector.

Claims (1)

[Scope of utility model registration request] A column that is press-fitted into an excavated groove at regular intervals facing each other along the inner wall, has guide grooves on both sides and has a connecting member vertically in front, and a support jack that maintains the spacing between the opposing columns. In the earth retaining method, in which the earth retaining structure formed from the earth retaining plates fitted between the guide grooves of each support column is assembled and connected in the longitudinal direction of the excavated groove, the earth retaining structure is assembled and connected in the longitudinal direction of the excavated groove. Adjacent columns that are fitted and fixed to the connecting member on the front of the columns that are erected and press-fitted into the ground at right angles to the outer surfaces of the columns that are erected and press-fitted into the soil and whose spacing is maintained by support jacks. A connection plate with a hat-shaped cross section that fits into a guide groove on the outside surface and locks on the opening edge thereof, a support on one side to which this connection plate is attached, and a support that is erected and press-fitted parallel to the outside surface of the connection plate. In order to connect, there is a connector which is made by joining two connection plates with a dish-shaped cross section back to back, which fit into the guide groove of both and lock onto the opening edge of the guide groove, and a support on one side just before the end of the excavation groove and the back of the support. In order to connect columns that are installed vertically and press-fitted next to each other, an excavated groove consisting of a connection plate with a dish-shaped cross section that is fixed to the back side of the columns on the negative side and is fitted and locked into the guide groove of the adjacent column. Construction equipment for earth retaining method at right angle bends.