JPH0521539Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an earth retaining device suitable for earth retaining work on soft ground and relatively compact ground.

<Conventional technology> When burying water and sewage pipes or underground cables or excavating trenches, a simple earth retaining method is known that can perform the excavation work, the laying work of buried objects, and the backfilling work in parallel. ing.

A conventional earth retaining device used in the above-mentioned simple earth retaining method is shown in Figures 4 and 5.

This earth retaining device consists of earth retaining plates and a support device.

Specifically, as shown in FIG. 4, a support device is constructed in which a support member b is horizontally suspended and connected between opposing columns a.

Both ends of support member b are pivotally supported by each support column a, and both ends of support member b are provided with inclined surfaces c that come into contact with column a to control the rotation of support member b at a predetermined level. It is configured to be stopped at an angle.

As shown in FIG. 5, the structure is such that supporting devices are arranged at intervals and retaining plates d are attached between columns a of adjacent supporting devices.

As shown in Figures 4 and 5, the earth retaining method using the above-mentioned conventional earth retaining device involves gradually pressing the support device with the earth retaining plate d attached into the earth while excavating the earth. It's a method.

At this time, if the opposing struts a are press-fitted at once, there is a risk that the support member b may be deformed or damaged.

However, since the support member b rotates to some extent,
The opposing struts a are alternately slidable.

Therefore, as shown in FIG.
It is possible to press-fit the support member b alternately.
Since the load is hardly applied to the support member b, deformation or damage to the support member b can be prevented.

<Problems to be Solved by the Present Invention> While the conventional earth retaining device has the above-mentioned advantages, it also has the following problems.

In other words, in places where the ground is soft and the ground is likely to collapse,
The method of excavating the ground and pressing in the earth retaining device in parallel as described above is effective because it prevents the ground from collapsing.

On the other hand, in places where the ground is relatively compact and will not collapse quickly, the entire earth retaining device may be lifted up by a crane or the like and installed at once into the excavated trench after the ground is excavated to the required depth. This will make earth retaining work easier and faster.

However, the conventional earth retaining apparatus is configured such that the support member b rotates and the support column a slides as described above, and the earth retaining apparatus cannot maintain a constant shape.

Therefore, it becomes difficult to assemble the entire earth retaining device in advance on the ground.

Furthermore, it is inconvenient when lifting the earth retaining device with a crane or the like, when installing it in an excavated trench, or when temporarily placing it temporarily after the work is completed.

As described above, the conventional earth retaining device has the problem that it is suitable for earth retaining work on soft ground, but is not suitable for earth retaining work on relatively compact ground.

<Purpose of the present invention> The present invention has been made in view of the above points, and an object thereof is to provide an earth retaining device suitable for earth retaining work on soft ground and relatively compact ground.

<Configuration of the present invention> An embodiment of the present invention will be described below with reference to the drawings.

<A> Strut As shown in FIG. 1, for example, the strut 1 fixes the backs of two steel members 11 and 12 having a C-shaped or U-shaped cross section, and furthermore, attaches to the sides of these two steel members 11 and 12, Separate C-shaped or U-shaped steel material 1
The back part of 3 is fixed and constructed.

A plurality of pin holes 14 are formed in the side surface of the steel material 13 at predetermined intervals.

The struts 1 constructed as described above are attached to each side edge of the retaining plates 2, which are arranged to face each other, as shown in FIG.

When installing, the side edge of the retaining plate 2 is fitted into the slit portion of the steel material 11 or 12.

<B> Supporting member A steel pipe or the like is used for the supporting member 3, and as shown in FIG. 2, it is suspended horizontally between the opposing columns 1.

Connection jigs 4 are provided at both ends of the support member 3, and the support member 3 is pivotally supported by the support columns 1 on both sides by the connection jigs 4.

Further, the support member 3 is configured such that its overall length can be adjusted by a known means such as a screw method or a hydraulic cylinder method.

Further, the support member 3 may not have a length adjustment function.

<C> Connecting jig Connecting jig 4 attached to both ends of support member 3
is made of, for example, an arrow-shaped block as shown in FIG.

At the end of the connecting jig 4, with the arrow-shaped surface positioned in the vertical direction, a slit is cut out in a tapered shape from top to bottom to form a wedge insertion groove 41.

The inclined surface of the uncut portion of this wedge insertion groove 41 is defined as a support abutment surface 42.

This strut abutting surface 42 is in contact with the inner surface of the strut 1 to stop the rotation of the support member 3 at a predetermined angle.

Further, a pin hole 43 is passed through the center of the connecting jig 4 in a direction perpendicular to the axis of the support member 3.

<D> Assembling each member First, the retaining plates 2 are positioned so that they face each other, and the supports 1 are attached to the side edges of each retaining plate 2.

Next, the connecting jigs 4 at both ends of the support member 3 are inserted into the slits in the steel material 13 of the opposing support column 1.

Then, the pin hole 43 of the connecting jig 4 and the pin hole 14 of the steel material 13 are aligned, and the pin 5 is penetrated and pivotally supported.

Thereby, the support member 3 is rotatably attached to the support column 1.

However, since the column abutment surface 42 contacts the inner surface of the column 1, the support member 3 is prevented from rotating at a predetermined angle.

On the other hand, when fixing the support member 3 to the support column 1, the wedge 6 is driven into the wedge insertion groove 41 of the connection jig 4, as shown in FIG.

<How to use the earth retaining device> Next, how to use the earth retaining device configured as described above will be explained.

<B> When used for earth retention on soft ground When the earth retention device of the present invention is used for earth retention on soft ground, the wedges 6 are not driven into the wedge insertion grooves 41 of the connecting jig 4, and the opposing supports 1 can slide alternately. Keep it in good condition.

Then, while excavating the ground, the opposite pillar 1
A method is adopted in which the earth retaining device is installed by being press-fitted alternately and gradually settling into the ground.

<B> When used for earth retention on relatively compact ground When used for earth retention on relatively compact ground, wedges 6 are driven into the wedge insertion grooves 41 of the connecting jig 4, and the opposing supports 1 are alternately connected. The support member 3 is fixed to the support column 1 so as not to slide.

Next, the ground is excavated to a required depth, and the entire earth retaining device is lifted up by a crane or the like and installed in the excavated trench so that the earth retaining plates 2 are parallel to the excavated surface of the ground.

<Effects of the present invention> Since the present invention is configured as described above, the following effects can be obtained.

<B> In places where the ground is relatively compact and the ground will not collapse immediately, the ground should be excavated to the required depth in advance, and then the entire earth retaining device should be hoisted with a crane or the like and placed once inside the excavated trench. It is easier and faster to perform earth retaining work by installing the

However, conventional earth retaining devices are configured so that the support member rotates and the column slides.
Earth retaining devices cannot maintain a fixed shape.

Therefore, it becomes difficult to assemble the entire earth retaining device in advance on the ground.

Furthermore, it is inconvenient when lifting the earth retaining device with a crane or the like, when installing it in an excavated trench, or when temporarily placing it temporarily after the work is completed.

In contrast, in the present invention, a wedge is driven into the wedge insertion groove of the connecting jig, and the supporting member is fixed to the support column so that the support column does not slide.

Therefore, the entire earth retaining device is fixed and can maintain a constant shape.

Therefore, operations such as assembling, lifting, installing, and temporarily placing the earth retaining device can be performed easily and in a short time.

<B> As mentioned above, the present invention can be effectively used for retaining earth on both relatively compact and soft ground.

In other words, when using the earth retaining device in soft ground, the opposing supports are left in a slidable state, and while excavating the ground, the opposing supports are alternately press-fitted into the ground, and the earth retaining device is gradually moved into the ground. Can be settled and installed.

Therefore, even in places where the ground is soft and prone to collapse, the excavation of the earth and the press-in of the earth retaining device can be carried out in parallel, as described above, making it possible to effectively prevent the collapse of the earth. can.

Furthermore, since almost no load is applied to the support member, deformation or damage to the support member can be prevented.

[Brief explanation of the drawing]

Fig. 1: Explanatory diagram of one embodiment of the present invention, Fig. 2
Figure: Explanatory diagram of the state in which the strut is assembled to the earth retaining board, 3rd
Figure: An explanatory diagram of the construction of the earth retaining device. Figures 4 and 5: An explanatory diagram of the prior art.

Claims (1)

[Scope of Claim for Utility Model Registration] Retaining plates arranged to face each other, columns attached to the side edges of each retaining plate, and supporting members horizontally suspended with both ends pivotally supported on the opposing columns. At both ends of this support member, there are inclined surfaces that come into contact with the support column and can stop the rotation of the support member at a predetermined angle, and wedges that can fix the support member to the support column. An earth retaining device characterized by having grooves formed therein.