JP2552195B2 - How to build a reinforced embankment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for constructing a reinforced embankment.

<Problems of conventional technology> As a method of reinforcing the embankment constructed on the ground, there is a case where a concrete retaining wall is constructed on the slope of the embankment.

In this case, place the formwork at a predetermined distance from the slope,
Concrete is cast between the formwork and the slope to construct the retaining wall.

Here, when pouring concrete when constructing a retaining wall, a large amount of pressure is applied to the formwork, so that large-scale support work must be applied to the outside or the upper part of the formwork.

 Therefore, the construction period and the construction cost both increase.

<Purpose of the present invention> The present invention has been made to solve the above problems, and can easily assemble a concrete placing formwork for constructing a retaining wall, thereby shortening the construction period and reducing the construction cost. It is an object of the present invention to provide a method of constructing a reinforced embankment capable of saving money.

<Means for Solving Problems> That is, according to the present invention, a embankment body is constructed in one layer or a plurality of layers by constructing a embankment body by winding a sandbag at one end to lay a reinforcing sheet, and inserting an embankment material on the reinforcing sheet. After that, on the slope of the embankment formed by sandbags, a formwork is attached via a spacer rod at a certain distance from the slope, and concrete is placed between the formwork and the slope to form the embankment. In the method of constructing a reinforced embankment by constructing a retaining wall on the side,
In the method for constructing a reinforced embankment, the spacer rod is formed to be expandable and contractable, and the gap between the sloped surface of the embankment and the form is adjustable.

<Description of the Present Invention> The present invention will be described in detail below.

<A> Construction of embankment body (Figs. 1 and 2) First, as shown in Fig. 2, sandbags and the like are packed in a bag to produce a sandbag 1 having a long pillow shape.

Next, one or a plurality of the above sandbags 1 are overlapped and wound around one end of the reinforcing sheet 2 having a band shape.

For the reinforcing sheet 2, a known sheet member such as geotextile having a predetermined strength is used.

Further, as the reinforcing sheet 2, a water-permeable material is used so that drainage in the embankment can be favorably performed.

Then, the reinforcing sheet 2 is laid on the ground for a predetermined length on the planned construction side of the embankment.

The laying length and area of the reinforcing sheet 2 are designed so that sufficient frictional resistance can be taken in the embankment so that the slope of the embankment does not collapse.

Next, the embankment material 3 such as earth and sand is put on the reinforcing sheet 2.

The input height of the embankment material 3 is substantially equal to the height of the sandbag 1.

As a result, since the reinforcing sheet 2 is buried in the embankment, it serves as an anchor for the sandbag 1 and can prevent the sandbag 1 from falling to the opposite side of the embankment body.

The above work is repeated upward to stack the embankments, and
It is possible to build a multi-layered embankment as shown.

When constructing a multi-layered embankment, the stability is improved by shifting the upper part inward from the lower part and constructing it in a stepwise manner.

<B> Spacer rod (Fig. 3) The spacer rod 4 has a structure in which both screw rods 41 and 42 having screws at both ends are connected to each other by joints 43 having axially formed screw holes.

Therefore, the length in the axial direction can be adjusted by rotating the screw rods 42 or 41.

A connector 44 is attached to the free ends of the screw rods 42, and the connector 44 can be fixed to the form 6 by a foam tie 45 or the like.

On the other hand, the L-shaped steel plate 5 is fixed to the free ends of the screw rods 41 by nuts 51.

A steel plate 52 is attached to the upper surface of the horizontal plate of the L-shaped steel plate 5 with bolts 53 and nuts 54.

Further, the reinforcing member 55 is fixed to the L-shaped steel plate 5 so as to have a triangular shape to improve the strength.

Then, the L-shaped steel plate 5 side of the spacer rod 4 configured as described above is connected to the slope of the embankment.

That is, as shown in FIG. 4, the reinforcing sheet 2 on the slope side
Are sandwiched between the L-shaped steel plate 5 and the helicopter steel plate 52, and are fastened and connected by bolts 53 and nuts 54.

<C> Construction of Retaining Wall (Figs. 1 and 3) As shown in Fig. 1, after the embankment was constructed up to a predetermined height, the above-mentioned structure was applied to the free end of each spacer rod 4 protruding from the slope. Attach the formwork 6 for concrete pouring.

After assembling the formwork 6 along the sandbag 1 with a predetermined space, concrete 71 is assembled between the slope and the formwork 6.
And the retaining wall 7 is constructed.

At this time, the casting pressure of the concrete acts on the form 6, but the form 6 is made by the plurality of spacer rods 4,
Since the reaction force can be applied to the embankment, the retaining wall 7 can be reliably constructed.

Further, when the wall thickness of the retaining wall 7 is adjusted, the dimension between the form frame 6 and the slope can be arbitrarily selected by changing the length of the spacer rod 4, so that a predetermined value can be obtained. The designed wall thickness can be secured.

<D> Other structure of spacer rod (Fig. 5) When concrete is placed as described above, the embankment body sinks largely, the embankment side part of the spacer rod is pulled downward, and cracks occur in the concrete. It may occur.

In such a case, as shown in FIG. 5, a pipe body such as a vinyl chloride pipe 8 is arranged around the spacer rod between the formwork 6 and the L-shaped steel plate 5, and the edge of the concrete is cut to cut the concrete. A method of cutting off the spacer rod after driving is conceivable.

Specifically, the fixing nut 9 is attached to the L-shaped steel plate 5 by welding or the like, and the both threaded rods 91 are passed through the fixing nut 9 to be attached.

On the other hand, the free ends of the screw rods 91 are fixed by penetrating the formwork 6.

For example, a foam tie 92 is attached to the penetrating ends of the two screw rods 91 on the mold frame 6 side, a lateral flap 93 is interposed, and a nut 94 is tightened to fix.

The lengths of the two screw rods 91 are adjusted by rotating the both screw rods 91 within the engraved range of the screw portion 95 on the L-shaped steel plate 5 side.

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

<A> When the formwork for concrete pouring is assembled, by using the spacer rod, the embankment itself can exert a reaction force that opposes the pouring pressure of the concrete, especially the pressure to the side.

 Therefore, the retaining wall can be reliably constructed.

Further, conventionally, it was necessary to assemble a large supporting structure outside or on the upper side of the formwork. However, in the present invention, such a supporting structure is not required, so that the construction period is shortened and the construction cost is reduced. Can be.

<B> By adjusting the length of the spacer rod, the distance between the form frame and the slope frame can be arbitrarily selected.

Therefore, the wall thickness of the retaining wall can be easily changed.

If the slope of the embankment is vertical, if the bottom of the formwork is installed correctly, the space between the slope and the slope will not be a concern and the assembly will be straight up and assembled.

However, when the slope as shown in FIG. 1 of the present invention is inclined, it is necessary to always accurately control the distance from the slope when the mold is assembled upward.

In such a case, it is possible to easily and accurately manage the distance between the slope and the mold by using the spacer rod having the adjusting function as in the present invention.

[Brief description of drawings]

 Fig. 1: Overall view of the embankment structure of the present invention Fig. 2: Explanatory diagram of sandbag and reinforcing sheet Fig. 3: Explanatory diagram of structure of spacer rod Fig. 4: Explanatory diagram of installation of spacer rod Fig. 5: Spacer Illustration of other structure of rod

Continuation of the front page (56) References JP-A-59-52024 (JP, A) JP-A-63-47418 (JP, A) JP-A-2-164924 (JP, A)

Claims (1)

(57) [Claims] 1. An embankment body constructed by laminating a sandbag on one end, laying a reinforcing sheet, and charging a filling material onto the reinforcing sheet to construct a single layer or a plurality of layers, and then forming the embankment body with a sandbag. A formwork is attached to the slope with a constant distance from the slope via a spacer rod, concrete is placed between the formwork and the slope to construct a retaining wall on the side of the embankment, In the method for constructing a reinforced embankment, the spacer rod is formed so as to be expandable and contractable, and the gap between the slope surface portion of the embankment body and the form can be adjusted.