JP2599293B2 - Construction method of embankment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for constructing an embankment.

<Conventional technology> When laying railroads and roads higher than the ground,
In some cases, embankments are built up by embedding soil and the like, and railroads, roads, and the like are laid on top of the embankment.

As a method of constructing the embankment, there is a method in which sandbags are piled up at intervals to construct a wall body, and soil and the like are erected between the sandbag walls.

<Problems to be Solved by the Present Invention> A conventional sandbag is obtained by filling a bag body with a filler such as sand manually.

Therefore, it takes a lot of time and labor to form the sandbag.

In addition, if the wall is constructed only by stacking the sandbags, the sandbag wall may fall down due to the earth pressure applied between the sandbag walls, and the embankment may collapse.

<Object of the present invention> The present invention has been made in order to solve the above-mentioned problems, and provides a method for constructing an embankment capable of easily and quickly forming a sandbag and constructing a stable embankment. The purpose is to do.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

<A> Formation of Bag Body (FIG. 2) The bag body 1 is formed of a flexible sheet having at least air permeability, for example, cloth.

The shape and size of the bag 1 are selected according to the scale of the embankment and the like. In this embodiment, a long pillow-shaped bag 1 is formed.

The bag 1 is closed, and a room for filling a filler such as sand is formed inside.

The bag 1 is provided with one or more inlets 11 for a filler such as sand.

The inlet 11 has a pocket shape, and the hose 2 for injecting sand or the like can be inserted therein.

Then, when the hose 2 is pulled out after being filled with sand or the like, the inlet 11 is naturally closed.

<B> Reinforcement sheet (Fig. 3) The reinforcement sheet is a flexible sheet having water permeability.

Using this reinforcing sheet, a flat portion and a loop-shaped storage portion 4 are formed halfway along the flat portion.

One of the flat portions is the embankment flat portion 3 with the storage portion 4 interposed therebetween, and the other is the connecting flat portion 31.

The storage portion is formed by bending a reinforcing sheet into a loop shape and fixing both ends of the reinforcing sheet to a flat surface portion with a stopper 41.

 Then, the bag body 1 is stored in the storage section 4.

<C> Pressure feeding of filler (FIG. 2) Sand 5 or the like is used as a filler to be filled in the bag body 1.

For example, as shown in FIG. 2, a device for feeding a filling material in which a compressor 22 is connected to a feeding device 21 having a filling hose 2 can be considered.

First, the tip of the hose 2 is inserted into the inlet 11 of the bag 1.

Next, the pump 21 and the compressor 22 are operated, and the sand 5 is put into the pump 21 by a belt conveyor or the like, and is fed into the hose 2 by pressure.

Then, the sand 5 is spouted vigorously into the bag 1 from the end of the hose 2, and the sand 5 can be immediately filled into the bag 1 by the pumping force of the machine.

At this time, since the bag 1 has air permeability, air escapes from the bag 1 to the outside, and only the sand 5 is filled in the bag 1.

After the filling of the sand 5 is completed, the compressor 21 and the compressor 22 are stopped, and the hose 2 is pulled out of the bag 1.

At this time, since the inlet 11 is configured to close naturally when the hose 2 is pulled out, the work of closing the inlet 11 can be omitted.

As another method of pressure-feeding the filler, a method of pushing the filler into the bag 1 using a piston or the like is also conceivable.

<D> Construction of the embankment (Fig. 1) The reinforcing sheet containing the sandbag is placed on the ground to be embanked.

An embankment material 6 such as soil is put on the embankment flat surface portion 3 of the reinforcing sheet, the embankment material 6 is rolled by a roller 7, and embankment is performed to the height of the storage portion 4.

Then, in the same manner, the reinforcing sheets containing sandbags are piled up in a plurality of stages, and the embankment material 6 is supplied, thereby constructing an embankment having a predetermined height.

<E> Reinforcement (FIGS. 1 and 4) The rigid wall 8 is constructed along the edge of the embankment constructed as described above.

First, as shown in FIG. 4, vertical reinforcing bars 81 and horizontal reinforcing bars 82 are arranged in a grid pattern along the edge of the embankment.

At this time, a space is provided between the vertical and horizontal reinforcing bars 81 and 82 and the storage section 4 of the reinforcing sheet.

<F> Connection between reinforcing sheet and reinforcing bar (FIGS. 1 and 4) Next, the ends of the connecting flat portions 31 of the reinforcing sheet are directly connected to the vertical and horizontal reinforcing bars 81 and 82.

In this case, the ends of the connecting flat portions 31 are connected to the vertical reinforcing bars 81 and the horizontal reinforcing bars.
It is good to connect to the intersection of 82 with a wire or the like.

<G> Assembling of the formwork The formwork is assembled on both sides of the vertical and horizontal reinforcing bars 81 and 82 by sandwiching the reinforcing sheet up and down.

Then, concrete is poured into the formwork to construct the rigid wall 8 as shown in FIG.

<H> Filling of drainage material (FIG. 1) An interval is provided in advance between the rigid wall 8 and the storage portion 4 of the reinforcing sheet.

 During this time, drainage material 9 such as gravel is filled.

This allows drainage of the back surface of the rigid wall 8 and eliminates the risk that the rigid wall 8 will be weakened by flooding or collapsed by water pressure.

<Other Example 1> Although the connecting flat portion 31 of the reinforcing sheet of the above-described embodiment is a single piece integrated with the embankment flat portion 3, as another embodiment, a connecting flat portion separately formed is used. 31 may be connected to the embankment flat part 3 or the storage part 4.

Further, the connecting flat portion 31 is not limited to a single sheet, and a plurality of strips may be attached.

In short, it is only necessary to have a strength capable of reliably connecting the embankment portion and the rigid wall 8.

<Other Example 2> As still another example, the inside of the bag 1 may be divided into a plurality of rooms.

In this case, the inside of the bag 1 may be partitioned by a sheet having the same air permeability as the sheet forming the bag 1.

For example, as shown in FIG. 5, according to a method in which the longitudinal end of the sheet is folded inward and the end is fixed by the clasp 12, the sheet can be easily divided.

By dividing the inside of the bag 1 in this manner, the bag 1
Installation stability can be improved.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> As in the related art, simply constructing a wall by stacking sandbags may cause the sandbag walls to fall down due to the earth pressure applied between the sandbag walls, and the embankment may collapse.

On the other hand, the present invention has a structure in which a reinforcing sheet is attached to a sandbag and an embankment material is put on the reinforcing sheet.

That is, since the reinforcing sheet is embedded in the embankment material, the reinforcing sheet is fixed in the embankment material by frictional resistance.

Therefore, since the reinforcing sheet is not pulled out, the sandbag can be prevented from falling down, and a stable embankment can be built.

Further, by directly connecting the rigid wall and the reinforcing sheet, the stability of the embankment can be further improved.

<B> A drainage material such as gravel is filled between the rigid wall and the sandbag portion.

Therefore, drainage of the back of the rigid wall can be made possible.

Therefore, there is no fear that the rigid body wall is weakened by water intrusion or collapsed by water pressure.

<C> In the conventional sandbag, since a bag body is filled with a filler such as sand manually, a large amount of time and labor is required for forming the sandbag.

On the other hand, in the present invention, a filling material such as sand is efficiently filled into a bag having air permeability by a pumping force of a machine.

Therefore, the sandbag can be formed very quickly and easily as compared with the case of the conventional manual operation.

<D> According to the present invention, a filler such as sand can be efficiently filled by a pumping force of a machine, and therefore a large capacity sandbag can be formed in a short time.

<E> When the inside of the sandbag is divided into a plurality of rooms, the installation stability of the sandbag is improved, and the stability of the entire embankment can be improved.

<F> The filler inlet provided in the sandbag of the present invention is configured to close naturally when the filler hose is pulled out.

 Therefore, the work of closing the injection port can be omitted.

[Brief description of the drawings]

 Fig. 1: Illustration of one embodiment of the present invention Fig. 2: Illustration of bag body Fig. 3: Illustration of reinforcing sheet Fig. 4: Illustration of connection between reinforcing bar and reinforcing sheet Fig. 5: Other Explanatory drawing of Example 2

Claims (2)

(57) [Claims] 1. A flat sheet and a loop-shaped storage section formed on the way of the flat part by a flexible sheet having water permeability, and a flexible sheet having at least air permeability. A closed bag is formed, the bag is placed in the storage section, a filler is pumped into the bag from an inlet provided in the bag to form a sandbag, and one side of the sandbag sandwiching the sandbag is formed. A method for constructing an embankment, wherein embankment is performed on the plane portion, and an end of the plane portion on the other side is directly connected to a rigid wall constructed along a sandbag. 2. The method for constructing an embankment according to claim 1, wherein the inside of the bag body installed in the loop portion of the sheet is divided into a plurality of rooms.