JPH0247428A - Slope face protecting construction - Google Patents

Abstract

PURPOSE:To prevent sliding from being generated by a method wherein a network body is heaped up on a fiber assembled-body to be laid, and wherein a concrete block is mounted and is firmly fitted on mortar filled up in the shapes of spots, and wherein plants are bred on another place earth filled in a space. CONSTITUTION:A mat 1 is formed with a fiber assembled-body 2, a network body 4, a concrete block 6, and mortar or concrete 8. After that, on a slope face B and an upper bed C, the assembled body 2 is laid so that the longitudinal direction may be the inclined direction of the slope face B, and on the assembled body 2, the network body 4 is heaped up. After that, at a specified position on the network body 4, the mortar 8 or the like is placed at the shaped of spots, and after that, the block 6 is mounted on and is pressed to come in close contact with. Then, a space between the blocks 6 is filled up with another place earth D, and plants are bred on the earth D. Accordingly, by a great friction coefficient between the assembled body and ground surface, sliding against the slope face can be certainly prevented from being generated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a slope protection method.

[Prior Art] Various methods are known for protecting soil on slopes, preventing erosion, and greening the soil.

These construction methods are carried out by laying a slope protection mat with blocks on the slope, which is made of a large number of concrete blocks fixed to a non-woven filter sheet.

The fixation is achieved by pouring concrete into formwork at the factory, and before the concrete hardens, a filter sheet is laid on the formwork and joined to the blocks, and after curing, the formwork is turned over and removed, or the filter sheet is The blocks are glued together using adhesive.

After such mats are transported to the site and laid, and the slope shoulders are fixed to the slope shoulders by driving anchors or embedding concrete, customer The soil is compacted and vegetation is allowed to grow in the soil.

[Problems to be solved by the invention] In the conventional construction method described above, a non-woven filter sheet is used for the mat, so the coefficient of friction with the ground surface is small.
Furthermore, since the sheet separates the soil from the soil below, the filter sheet tends to slide on the slope. Therefore, it is necessary to take measures to prevent the filter sheet from sliding, especially on slopes with large slopes. be.

In addition, since the nonwoven fabric has a relatively small porosity, the roots of the plants are stretched to the soil below through the filter sheet, reducing the greening effect.

An object of the present invention is to provide a slope protection method that is suitable for slopes with large slopes and improves the effect of greening.

[Means for Solving the Problems] The slope protection method according to the present invention is a fiber assembly in which relatively thick synthetic resin fibers are blown onto a flat surface from a nozzle and intertwined with each other to form a relatively thick mat shape with a high porosity. A synthetic resin sheet is perforated and stretched to form a net shape, and a net body formed into a net shape is laid on top of the fiber aggregate, and mortar or Pile concrete in spots, place a concrete block on the mortar or concrete, and fix the concrete block, the net body, and the fiber aggregate together with mortar or concrete,
Filling the gaps between the concrete blocks with additional soil,
Vegetation is grown on the soil.

The above-mentioned fiber aggregate is made by blowing polypropylene onto a flat surface to a thickness of, for example, approximately 10 m by thermoforming with an extrusion processing machine, and stacking the net body on the flat side. It is preferable to use the matching side.

Further, it is preferable to use a net material in which holes are punched in a polymer sheet and the polymer sheet is stretched to form a net shape with eye dimensions of, for example, about 30 mm in length and 40 mm in width.

Concrete blocks can have any shape such as square, rectangular, or triangular planes, and they can also have semicircular recesses in the drawings and circular holes in the center. is preferred.

[Function] According to the slope protection method configured as described above, the fiber aggregate has a large mold rod coefficient with the ground surface, and therefore, it reliably prevents the mat from sliding on a slope with a large slope.

In addition, the net body compensates for the tensile strength lacking in the fiber aggregate, works together with the fiber aggregate with a high porosity, binds the top soil with the soil below, and further prevents the mat from sliding.

In addition, the fiber aggregate with a high porosity and the net body make it easy for the roots of the plants in the added soil to spread to the soil below, promoting the growth of the plants.

Additionally, this construction method uses a concrete mixer and can be carried out on site, making it convenient.

Moreover, the fiber aggregate can also be laid by transporting a stack of net bodies to the site and suspending it with a crane via a hanging hardware.

In particular, since the fiber aggregate has a drainage function and the net body has tensile strength, the combination of the two facilitates handling and can contribute to the growth of plants.

[Example] The present invention will be described in detail below with reference to the drawings.

Figures 1 to 3 show the completed state of a mat with blocks for slope protection, the whole of which is indicated by the reference numeral 1, in which the present invention is implemented, and the mat 1 consists of a fiber N aggregate 2 and a fiber aggregate thereof. 2
It consists of a net body 4 overlaid on top, a concrete block 6 placed on the net body 4, and mortar or concrete 8 fixing these three together.

As shown in FIG. 2, the fiber aggregate 2 is produced by thermoforming polypropylene using an extrusion processing machine and extruding it from a nozzle to about 1 liter, for example.
The relatively thick fibers 3 of 111 mm are blown onto the flat plate A, and the fibers are intertwined with each other to form a relatively hot mat having a large porosity and a thickness of, for example, about 10 mm.

The net body 4 is made by punching holes in the polymer sheet, and
f. As shown in FIG. 5 when the eyes are expanded, the eyes 5 are formed into a net shape with dimensions of, for example, 30 squares in length and 40 squares in width.

The concrete blocks 6 are, for example, formed into a rectangular body with a 200 mm square plane and a 50 mm height, and are arranged with a gap of, for example, 50 m between each other in FIG. 1, that is, at a pitch of 250 m in length and width. There is. In this concrete block 6, a through hole 7 having an inner diameter of, for example, about 120 mm is formed as shown by the chain line, and the through hole 7 can be filled with soil for vegetation.

During construction, the fiber aggregates 2 are laid on the slope B and the top C, with the flat plate A side at the time of formation (Fig. 4) being the front side, so that the longitudinal direction is the slope direction of the slope (Fig. 6). ).

Next, the net body 4 is placed on top of the fiber aggregate 2 (FIG. 7).

Next, a predetermined amount of mortar or concrete 8 is placed in spots at predetermined positions on the net body 4, that is, at a pitch of 250 mm vertically and horizontally (FIG. 8). The predetermined amount of mortar or concrete is preferably an amount sufficient to fill the bottom surface of the block 6 and to fix the net body 4 and the fiber aggregate 2 together, as shown in FIG.

Next, concrete blocks 6 are placed on top of the mortar or concrete 8 and pressed to adhere to the mortar or concrete 8 (Figure 9).Finally, the gaps between the concrete blocks 6 are filled with soil. Then, the construction is completed by adding vegetation to the soil (Figure 9).

In addition, in Fig. 7, an appropriate number of anchors (not shown) are driven into the top end 1a and, if necessary, the slope part 1b.
The fiber aggregate 2 and the net body 4 are fixed to the top C and the slope B.

Also, among the joints between adjacent mats IA, IB, and IC (Fig. 10), in the width direction of the mats, that is, mat IA,
As for the mat 18, as shown in FIG. 11, only the net body 4 of one side (for example, mat IB) is shifted and placed on the net body 4 of the other mat IA. On the other hand, in the longitudinal direction of the mats, that is, between the mats IA and IC, as shown in FIGS. 12 and 13, the eyes 5.5 of the net bodies 4.4 of the mutual mats are sewn together with ropes 9.

In addition, in FIG. 7, as shown in FIGS. 14 and 15, the fiber assembly 2 and the net body 4 are stacked together at the factory and transported to the site.
According to 1, the cable can be lifted and laid using a crane (not shown).

In addition, in FIG. 9, as shown in FIGS. 16 and 17, the gaps between the blocks 6 and 6 are filled with mortar or concrete 8, and additional soil is placed in the through holes 7 formed in the blocks 6. It is possible to fill the soil and grow vegetation in the soil.

[Effect] Since the present invention is configured as described above, the mat can be improved by the large friction coefficient of the fiber aggregate, the integration of the soil by the aggregate and the net body, and the soil below. It can reliably prevent sliding on slopes, be suitably applied to slopes with large slopes, protect soil on slopes, and prevent erosion.

In addition, the fiber aggregate and the net make it easier for plants grown in the soil to spread their roots to the soil below, thereby improving the greening effect.

In addition, it is convenient because it can be easily constructed on site.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the completed state of the slope protection mat with blocks according to the present invention, Figure 2 is a side view, and Figure 3 is a side view.
The drawing is a partially enlarged view of Fig. 2, Fig. 4 is a side view of the fiber assembly, Fig. 5 is a plan view of the net body, and Figs. 6 to 9 are process diagrams each explaining the embodiment. , Fig. 10 is a plan view showing the state of laying the mat, and Fig. 11 is the I of Fig. 10.
12 and 13 are a sectional view and a plan view taken along the I-I line in FIG. 10, respectively, and FIG.
Figures 15 and 15 are a side view and a perspective view showing the laying state of a fiber aggregate and a net body stacked on top of each other, and Figure 16
Figures 1 to 18 are a side view, a plan view, and a side sectional view showing another type R of interrogation. B...Slope C...Top D...Soil 1
... Mat with slope protection block 2 ... Fiber aggregate 3 ... Fiber 4 ... Mat body 6 ...
Concrete block 8...Mortar or concrete

Claims (1)

[Claims] Relatively thick synthetic resin fibers are blown onto a flat surface from a nozzle and intertwined with each other to form a relatively thick mat with a high porosity.The fiber aggregate is laid on a slope, and a synthetic resin sheet is laid on the fiber aggregate. Net bodies formed into a net shape by drilling and stretching are laid one on top of the other, mortar or concrete is placed in spots on the net-like predetermined positions on the mat body, and concrete blocks are placed on the mortar or concrete. The concrete block, the net body, and the fiber aggregate are fixed together with mortar or concrete, and the gaps between the concrete blocks are filled with soil, and the soil is covered with vegetation. Protection method.