JPH04108917A - Construction method for reinforced banking body - Google Patents

Abstract

PURPOSE:To simplify the operations by arranging supporting members between self-supporting form materials and drainage material side in which planar reinforcing materials are wrapped, removing the supporting members after construction of a banking body, and placing concrete between the form materials and the drainage materials. CONSTITUTION:A pit is excavated to install form materials 1 such as concrete panels, etc., into it, and then refilled to make the form materials self-supporting. Next the supporting members are arranged on the banking-body construction side of the form materials 1 through wedges, drainage materials 6 are wrapped up in the end parts of planar reinforcing materials 5, and banking materials 7 are laid over the other parts to construct a banking body. Further, each time one layer of the banking is constructed, the wedges and the supporting members are removed to be used for constructing the upper stages of the banking. After the removal of the supporting members, concrete is placed between the form materials 1 and the drainage materials 6 to construct a body concrete 8. Thus, the need for reaction force at the time of concrete placing can be eliminated to simplify the work.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a method for constructing a reinforced embankment.

<Prior art> A reinforced embankment body with a rigid wall surface is disclosed in Japanese Patent Application No. 6217494.
As shown in No. 5, it has many advantages and is especially suitable for construction in tight spaces.

However, on the other hand, since the rigidity of the wall is high, the flexibility that reinforced soil traditionally has is reduced, so a time lag is set between the time of embankment construction and the time of wall pouring, and the time difference between the embankment and the embankment after the wall is poured. Care must be taken to ensure that there is no extreme difference in deformation between them.

In addition, due to the characteristics of reinforced soil, it is necessary to place the reinforcing material and thoroughly compact the area to remove looseness when the reinforcing material is laid and to ensure that the reinforcing material is fully functional. be.

Therefore, during construction, it is necessary to use a soft wall surface that can easily follow deformation, and to install a highly rigid wall surface in front of the embankment while minimizing deformation.

As a method of constructing a reinforced embankment body with a rigid wall surface,
Generally, as shown in Fig. 11, during construction, sandbags A are used as temporary restraints and are wrapped around the edge of the planar reinforcing material, and the process of spreading and compacting the embankment material C is repeated until a predetermined height is reached. absorbs the deformation of

After that, the structure is constructed by assembling formwork on the embankment slope and pouring concrete, or by stacking retaining blocks in front and pouring concrete d.

<Problems to be Solved by the Present Invention> In the conventional method, sandbags a are used as temporary restraint, so when the construction quantity increases, a large amount of manpower is required, which is inefficient.

In addition, since a reaction force is required to resist the fluid pressure of concrete that occurs when concrete is placed,
When constructing an embankment, it becomes necessary to embed anchor materials and secure them to formwork or blocks, making the work complicated.

<Objective of the present invention> The present invention was made to solve the above-mentioned problems, and uses a formwork material that is self-supporting and can resist the fluid pressure of concrete, and eliminates the need for conventional sandbags. The purpose of this study is to provide a method for constructing reinforced embankments that can be constructed efficiently.

<Means for Solving the Problems> That is, the present invention erects a self-supporting formwork material, arranges an elastic support member on the side of the formwork material on the embankment body construction side, and Using the supporting members as guides, lay the planar reinforcing material in a nearly horizontal direction. Using the supporting members as guides, wrap the drainage material around the edge of the planar reinforcing material on the form material side. Build an embankment body by spreading embankment material in the area other than the part where the drainage material is rolled up, and after constructing this embankment body in one layer or multiple layers, remove the support member and remove the part between the formwork material and the drainage material. This is a method of constructing a reinforced embankment body by pouring concrete into the space formed in the concrete.

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

<A> Erecting the formwork material The formwork material 1 uses a plate having self-reliance and rigidity that can resist the fluid pressure of concrete.

The formwork material 1 may be a steel formwork that can be removed later, or a concrete panel that can remain as is and become part of the wall surface.

A horizontal bottom plate 11 is integrally formed at the lower end of the formwork 1, and a plurality of drainage holes 12 are provided in the formwork 1.

Then, as shown in FIG. 2, after excavation 2 is performed in the ground, the bottom plate 11 of this formwork material 1 is installed in the excavation 2.

Note that adjacent formwork members 1 are connected by engaging each other at cutouts 13 provided on the side edges of the formwork members 1 as shown in FIG.

After installing the formwork material 1, as shown in Fig. 3, root digging 2 is carried out.
Backfilling 21 is performed within the period.

As a result, the weight of the backfill 21 acts on the bottom plate 11,
The formwork material 1 can be reliably made to stand on its own.

<Mouth> Arrangement of support members The support member is made of an elastic member.

For example, a foam material such as styrofoam, sponge, or urethane, a mold material made of a plastic material such as vinyl chloride, or an air pack is used.

Specifically, as shown in FIG. 9, for example, a hollow elongated member having a curved support surface 31 and a tapered surface 32 formed on the opposite side thereof can be considered.

By forming the support surface 31 into a curved shape, drainage material can be easily caught in the support surface 31, and local stability of the soil can be ensured.

The function of this support member 3 is to act as a guide when rolling back the planar reinforcing material and to hold down drainage material when it is put in. It also prevents deformation due to laying of embankment material, compaction, and consolidation of the ground. This is to prevent deformation caused by the law from being transmitted to the formwork material 1.

Then, this support member 3 is arranged on the surface of the formwork material 1 on the embankment body construction side.

When placing the tapered surface 32 toward the formwork material 1 side,
A wedge 4 made of urethane or the like is interposed between the formwork material 1 and the support member 3.

In addition, as shown in FIG. 10, it is also possible to employ an integral support member 9 in which foamed polystyrene, an air bag, or the like is pasted on the entire surface of the formwork material 1 in advance.

<C> Laying of planar reinforcing material As the planar reinforcing material 5, a member having predetermined strength and drainage properties, such as geotextile, is used.

Then, as shown in FIG. 4, the planar reinforcing material 5 is laid in a substantially horizontal direction using the supporting member 3 as a guide.

<2> Incorporation of drainage material Next, using the supporting member 3 as a guide, a drainage material 6 such as crushed stone is placed on the edge of the planar reinforcing material 5, and the end of the planar reinforcing material 5 is folded back. , involving the drainage material 6.

<E> Spreading of embankment material Furthermore, the embankment material 7 is spread on the area outside the part where the drainage material 6 is rolled up on the planar reinforcing material 5 to construct an embankment body, and the embankment is compacted.

<Go> Removal of supporting members Each time the embankment is constructed layer by layer, remove the wedge 4,
The support member 3 is removed.

The removed support member 3 is installed again on the upper stage, and the next embankment body is constructed.

Then, this embankment body is constructed in one layer or in multiple layers to a predetermined height.

In addition, when the integrated support member 9 is used, the embankment body is constructed to a predetermined height and then removed.

When using a foam, it can be dissolved with an organic solvent, and when using an air pack, it can be removed all at once by removing the air.

<G> Casting concrete for the body As shown in FIG.
1 is poured and concrete 8 is constructed.

This completes the construction of the reinforced embankment.

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

(A) Since the formwork material is self-supporting, there is no need to take special reaction force when pouring concrete, and there is no need for a large-scale reaction force structure.

<Exposure> When the formwork is made of concrete panels, it becomes part of the wall as it is, so there is no need to remove the formwork (this simplifies the work).

<C> By using the support member, sandbags can be omitted, resulting in labor savings.

Figure 2: An explanatory diagram of the process of erecting formwork materials. Figure 3: An explanatory diagram of the arrangement of support members and the process of laying planar reinforcement. Figure 4: An explanatory diagram of the process of rolling in drainage material. Figure 5: Support. Illustration of the removal process of members Figure 6: Illustration of the completed embankment construction Figure 7: Illustration of the process of pouring concrete into the body Figure 8: Illustration of the notch in the formwork material Figure 9: Explanatory diagram of support member Fig. 10 D Explanatory diagram of integrated support member Fig. 11: Explanatory diagram of prior art

Claims (1)

[Claims] (1) A self-supporting formwork material is erected, an elastic support member is placed on the side of the formwork material on the embankment construction side, and the planar reinforcing material is placed almost horizontally using this support member as a guide. In addition, using the support members as guides, wrap the drainage material around the edge of the sheet reinforcing material on the formwork side, and then lay embankment on the area other than the part where the drainage material is rolled up on the sheet reinforcing material. After laying the materials and constructing an embankment body and constructing this embankment body in one layer or multiple layers, the supporting members are removed and concrete is poured into the space formed between the formwork material and the drainage material. A method for constructing reinforced embankments.