JPH04108916A - Construction method for reinforced banking body - Google Patents

Abstract

PURPOSE:To reduce the construction period and the construction cost by throwing banking materials on a reinforcing sheet in one end of which sandbags are wrapped, to construct a banking body, thereafter mounting forms along the slope by means of spacer-rods capable of being expanded and contracted to construct a retaining wall. CONSTITUTION:Banking materials 3 are thrown on a water-permeable reinforcing sheet 2 such as geo-textile, etc., in one end of which sandbags 1 are wrapped, up to the same height as that of the sandbags 1. In this case, the upper stage of a banking is shifted inward from the lower stage to repeat the operations in sequence to pile up the banking body. After construction of the banking body, the end parts of the reinforcing sheet 2 are pinched by steel plates of the end parts of spacer-rods 4 to be connected to the slope of the banking body. Then, the spacer-rods 4 are expanded and contracted to position forms 6 along the slope at fixed intervals, and between the formes and the slope concrete 71. is placed to construct a retaining wall 7. The concrete placing pressure can thus be applied to the banking body, and thereby the retaining wall 7 can be positively constructed.

Description

[Detailed description of the invention] 〈Industry〉Second field of use〉 The present invention relates to a method for constructing a reinforced embankment.

<Problems with Prior Art> As a method of reinforcing an embankment constructed on the ground, a concrete retaining wall may be constructed on the slope of the embankment.

In this case, a retaining wall is constructed by placing formwork at a predetermined distance from the slope and pouring concrete between the formwork and the slope.

When pouring concrete to construct a retaining wall, a large amount of pressure is applied to the formwork, so large-scale shoring must be provided outside or above the formwork.

As a result, both the construction period and construction cost will increase.

<Object of the present invention> The present invention was made to solve the above-mentioned problems, and it facilitates the assembly of concrete pouring forms for constructing retaining walls, shortens the construction period, and reduces construction costs. The purpose of the present invention is to provide a method for constructing a reinforced embankment body that can save money.

<Means for Solving the Problems> That is, the present invention consists of laying a reinforcing sheet with sandbags wrapped around one end, and placing embankment material on top of this reinforcing sheet to form an embankment body into one layer or multiple layers. After construction, one end of an expandable spacer rod is connected to the slope of the embankment formed by sandbags, and a formwork is attached to the free end of this spacer rod at a constant distance from the slope. This is a method of constructing a reinforced embankment in which retaining walls are built on the sides of the embankment by pouring concrete between the formwork and the slope.

<Description of the present invention> The present invention will be explained in detail below.

<A> Construction of embankment (Figure 1.2) First, as shown in Figure 2, a sandbag 1 in the form of a long column is manufactured by filling a bag with earth and sand.

Next, one or more sandbags 1 described above are wrapped around one end of the reinforcing sheet 2 in the form of a belt or the like.

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

Further, the reinforcing sheet 2 is made of water-permeable material so that drainage in the embankment can be carried out well.

Then, the reinforcing sheet 2 is laid on the ground for a predetermined length on the side where the embankment is planned to be constructed.

The laying length and area of the reinforcing sheet 2 are designed to provide sufficient frictional resistance during the embankment so that the slope portion of the embankment does not collapse.

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

The height of the filling material 3 shall be approximately equal to the height of the sandbag 1.

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

By repeating the above operations upward and stacking the embankments, a multi-layer embankment as shown in FIG. 1 can be constructed.

When constructing a multi-layered embankment, stability can be improved by building the embankment in a stair-like manner, with the upper tier being shifted inward than the lower tier.

<Opening> Spacer rod (Fig. 3) The spacer rod 4 has a structure in which both threaded rods 41 and 42, each having a screw carved into both ends, are connected by a joint 43 having a screw hole opened in the axial direction from both end surfaces.

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

A contact 44 is attached to the free ends of both threaded rods 42, and this contact 44 can be fixed to the formwork 6 with form ties 45 or the like.

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

A flat 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 in a triangular shape to improve the strength.

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

That is, as shown in FIG. 4, the reinforcing sheet 2 on the slope part is
It is sandwiched between an L-shaped steel plate 5 and a flat steel plate 52, and is connected by fastening with bolts 53 and nuts 54.

<C> Construction of retaining wall (Fig. 1.3) As shown in Fig. 1, after constructing the embankment to a predetermined height, the free end of each spacer rod 4 protruding from the slope is Attach formwork 6 for concrete pouring as shown.

After assembling the formwork 6 at predetermined intervals along the sandbag 1, concrete 71 is placed between the slope and the formwork 6.
and construct the retaining wall 7.

At this time, the concrete placement pressure acts on the formwork 6, but the formwork 6 can take a reaction force to the embankment body by the plurality of spacer rods 4, so that the retaining wall 7 can be reliably constructed. I can do it.

Furthermore, when adjusting the wall thickness of the retaining wall 7, by changing the length of the spacer rod 4, the dimension between the formwork 6 and the slope can be arbitrarily selected. The designed wall thickness can be secured.

<2> Other structures of spacer rods (Figure 5) When concrete is placed as described above, the embankment body sinks significantly, and the embankment side portion of the spacer rod is pulled downward, causing cracks in the concrete. There is a possibility that this may occur.

In such a case, as shown in FIG.
A possible method is to arrange a pipe body such as a PVC pipe 8 around the spacer rod between the shaped steel plates 5, cut the edge of the concrete, and remove the spacer rod after concrete is poured.

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

On the other hand, the free ends of both threaded rods 91 are fixed by passing through the formwork 6.

For example, a form tie 92 is attached to the penetrating end of six forms of both threaded rods 91, a horizontal butterfly 93 is interposed, and the nut 9
Tighten with 4 (=i and secure.

The lengths of both threaded rods 91 are adjusted by rotating both threaded rods 91 within the range in which the threaded portions 95 on the L-shaped steel plate 5 are carved.

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

(a) By using spacer rods when assembling the formwork for concrete pouring, the embankment body itself can absorb a reaction force against concrete pouring pressure, especially lateral pressure.

Therefore, a retaining wall can be reliably constructed.

Additionally, in the past, it was necessary to assemble large-scale shoring on the outside or above the formwork, but in the present invention,
Since such shoring is not required, it is possible to shorten the construction period and reduce construction costs.

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

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

[Brief explanation of drawings]

Figure 1: Overall diagram of the embankment structure of the present invention

Claims (1)

[Claims] (1) Sandbags are wrapped around one end and a reinforcing sheet is laid, and embankment material is poured onto this reinforcing sheet to construct an embankment body in one or more layers, and then the slope part of the embankment body formed with sandbags. One end of the expandable spacer rod is connected to the top of the slope, and a formwork is attached to the free end of the spacer rod at a certain distance from the slope.Concrete is poured between the formwork and the slope. A method of constructing a reinforced embankment body by constructing retaining walls on the sides of the embankment body.