WO2019205068A1

WO2019205068A1 - Ecological geogrid for slope protection

Info

Publication number: WO2019205068A1
Application number: PCT/CN2018/084731
Authority: WO
Inventors: 刘汉龙; 丁选明; 仉文岗
Original assignee: 重庆大学产业技术研究院
Priority date: 2018-04-26
Filing date: 2018-04-27
Publication date: 2019-10-31
Also published as: CN108589743A; CN108589743B

Abstract

Disclosed is an ecological geogrid (2) for slope protection. The ecological geogrid is composed of a geogrid protection net, an anchorage structure, nutrient soil (5), plant seeds (6), water delivery pipes (8), etc. The geogrid protection net is fixedly laid above the surface of a slope (1) by means of multiple soil nails. Holes in pipe-like geogrids (2) are filled with the nutrient soil (5), and the plant seeds (6) are placed in the nutrient soil (5). Rainwater on the slope (1) can permeate into the nutrient soil (5) in the pipe-like geogrids (2) via the mesh of a woven fabric (7), and the plant seeds (6) in the nutrient soil (5) absorb water, sprout and grow to form the green ecological slope (1). When the rainwater is insufficient, water can be supplied to the nutrient soil (5) at regular intervals of time by means of the water delivery pipes (8), thus ensuring sufficient water for plant growth. A construction method for the ecological geogrid protection slope is further disclosed.

Description

Ecological geogrid for slope protection

Technical field

The invention belongs to the technical field of rock and soil slope protection, and particularly relates to an ecological geogrid for slope protection and a construction method thereof.

Background technique

With the development of infrastructure construction in China, a large number of roads and railways have been constructed, and the excavation of earth and rock slopes has destroyed the original vegetation cover, causing a large amount of soil and rock slopes to be exposed, resulting in serious soil erosion, rockfall, etc. The safety hazard also caused damage to the ecological environment. In particular, the high-steep rock slope left over from the construction of the project lacks the soil conditions, nutrient conditions and water conditions for plant growth, which results in low plant survival rate and few techniques for comprehensive protection and greening. Conventional concrete protection structures are prone to visual aesthetic fatigue.

Prior to the present invention, a series of methods have been explored in the field of guest soil spraying at home and abroad, but there are still many needs for continuous improvement and improvement. For example, when the slope is sprayed, the seeds, pulp fibers, fertilizers and binders are sprayed onto the slope that needs greening, resulting in a large amount of seed waste, and a large amount of water-soluble fertilizer is lost with water, and the cost is high.

In recent years, geogrids have become more and more widely used in slope protection engineering. It is often used as a reinforced material for reinforced earth structures or as a composite material. Compared with other geosynthetic materials, it has unique performance and efficacy, which plays an important role in ensuring the safety of geotechnical engineering structures. However, in the past, the use of geogrid slope protection generally only considered its protective effect, without considering its green, ecological and environmental effects.

Summary of the invention

The object of the present invention is to provide an ecological geogrid for slope protection and a construction method thereof for the existing geogrid without considering the ecological effects of the existing geogrid, and to solve the problem of poor living environment and greening of the existing slope protection. The problem of unsatisfactory effect can not only reinforce the slope, but also achieve long-term greening, achieving the dual effects of engineering reinforcement and greening of the slope.

The technical solution adopted for achieving the object of the present invention is such an ecological geogrid for slope protection, characterized in that:

It mainly includes geogrid protective nets, anchoring structures, nutrient soil, plant seeds, and several water pipes.

The geogrid protection net consists of criss-crossed tubular geogrids that are fixedly laid over the slope surface by anchoring structures.

The interior of the tubular geogrid houses nutrient soil, plant seeds and water pipes.

The water pipe is located at the bottom of the inner cavity of the tubular geogrid and is fixed to the inner wall of the tubular geogrid. The wall of the water pipe facing upward has a plurality of drainage holes.

The upper surface of the geogrid fence has a plurality of plant growth holes. These plant growth holes are through holes that open on the wall of the pipe with the tubular geogrid facing up. Block the plant growth holes with a mesh woven cloth.

Further, fine pores are distributed on the tubular geogrid.

Further, the water pipes in the tubular geogrid are criss-crossed to form a water pipe network system.

Further, the water pipe is a hose.

Further, the anchoring structure includes a plurality of soil nails. These soil nails secure the geogrid fence to the slope.

The invention also discloses a construction method for the above ecological geogrid, which is characterized in that the following technical steps are included:

1) A tubular geogrid, a tubular geogrid, is produced at the factory. There is a reserved hole in the middle of the geogrid net, which forms a network of hollow pipes that are criss-crossed. The water pipe and the geogrid net are fixed together in the hole, and the water pipe forms a network system of water pipelines.

2) Prepare nutrient soil, which contains plant seeds and fertilizers for plant growth.

3) Fill the nutrient soil into the hole inside the geogrid.

4) Transport the ecological geogrid with water pipes and nutrient soil to the top of the slope.

5) Spread the geogrid net from top to bottom on the slope of the slope to cover the entire slope.

6) Fix the geogrid net on the slope by soil nails.

7] The water pipe passes through the water to make the nutrient soil moist, and ensure the water required for the germination and growth of the plant seeds. The water flow is flexibly adjusted according to the local rainfall.

8] Plant seeds germinate and grow under the moisturization of rainwater and soil nutrients, and grow through the micro-holes on the surface of the geogrid to green the slope.

The invention has the advantages and effects that the active protective net is changed from a traditional protective net to a slope protection and reinforcement system composed of a geogrid and an anchoring system to ensure the stability of the slope; Nutrient soil can be planted with vine plants to achieve greening of the rock slope and coverage of rain-resistant vegetation; the nutrient soil is placed inside the geogrid and covered with perforated woven fabric to ensure its stability; Combining local rainwater supply provides long-term and sufficient nutrient solution and moisture for plant growth, and at the same time enables plants to better resist changes in the external environment; the slope ecology consisting of geogrid protection net, anchor and vegetation The protection system can solve the problem that the existing living environment of the rock slope is poor and the greening effect is not ideal. It not only strengthens the slope, but also can achieve long-term greening, and realizes the ecologicalization of the slope engineering reinforcement.

DRAWINGS

1 is a three-dimensional schematic view of an ecological geogrid slope protection of the present invention;

Figure 2 is a cross-sectional view of the position of Figure 1A-A.

In the figure: 1 is the slope; 2 is the ecological geogrid; 3 is the plant growth hole; 4 is the soil nail fixing point; 5 is the nutrient soil; 6 is the plant seed; 7 is the mesh woven cloth; 8 is the water pipe ; 9 is a drainage hole.

detailed description

The invention is further illustrated by the following examples, but it should not be understood that the scope of the invention described above is limited to the following examples. Various changes and modifications may be made without departing from the spirit and scope of the invention.

Example 1:

As shown in Figure 1, an ecological geogrid for slope protection is characterized by:

It mainly includes geogrid protection net, anchoring structure, nutrient soil 5, plant seeds 6, and several water pipes.

The geogrid protective net consists of a cross-sectional tubular geogrid 2, which is fixedly laid on the surface of the slope 1 by an anchoring structure. The anchoring structure includes a plurality of soil nails. The tubular geogrid 2 has a plurality of soil nail fixing points 4. These soil nails fix the geogrid fence to the slope 1.

As shown in Fig. 2, the tubular geogrid 2 is a geogrid which is vertically and horizontally crossed, and its interior is hollow. The inside of the tubular geogrid 2 (i.e., inside the hollow tube) houses nutrient soil 5, plant seeds 6, and a water pipe 8.

The water pipe 8 is located at the bottom of the inner cavity of the tubular geogrid 2 and is fixed to the inner wall of the tubular geogrid 2. That is, the water pipe is buried in the nutrient soil near the bottom of the tubular geogrid. The pipe wall of the water pipe 8 has a plurality of drainage holes 9 facing upward.

The upper surface of the geogrid fence has a plurality of plant growth holes 3. These plant growth holes 3 are through holes that open on the pipe wall of the tubular geogrid 2 facing upward. The plant growth hole 3 is blocked with a mesh woven cloth 7.

After the construction of the geogrid protective net, the rainwater on the slope can be infiltrated into the nutrient soil in the tubular geogrid through the mesh of the non-woven woven fabric mesh woven fabric 7, and the plant seeds in the nutrient soil absorb water and germinate. Form a green ecological slope. When the rain is insufficient, the water supply network of the water pipe 8 can be used to supply water to the nutrient soil at regular intervals to ensure sufficient water for plant growth.

The tubular geogrid is distributed with fine pores, the tubular geogrid is filled with nutrient soil, and the seeds of the plant are placed in the nutrient soil. The nutrient soil contains the fertilizer required for plant growth and has water retention. . The specific mesh of the geogrid 2 can also be arranged in a diamond shape or other shapes. The water pipe 8 can realize the long-term supply of nutrition and water to the slope vegetation by using drip irrigation technology, and ensure the long-term stable greening and reinforcement effect of the slope.

The water pipes 8 in the tubular geogrid 2 are criss-crossed to form a network system of the water pipes 8. The water pipe can be drip irrigation technology. The water pipe 8 is a hose.

Example 2:

The embodiment is directed to a construction method for an ecological geogrid for slope protection according to the first embodiment, which is characterized in that the following technical steps are included:

1) A tubular geogrid, a tubular geogrid, is produced at the factory. There is a reserved hole in the middle of the geogrid net, which forms a network of hollow pipes that are criss-crossed. The water pipe and the geogrid net are fixed together in the hole, and the water pipe forms a network system of water pipelines. The concrete grid of the geogrid can also be arranged in a diamond shape or other shapes.

3) Fill the nutrient soil into the hole inside the geogrid.

6) Fix the geogrid net on the slope by soil nails.

7] The water pipe passes through the water to make the nutrient soil moist, and ensure the water required for the germination and growth of the plant seeds. The water flow is flexibly adjusted according to the local rainfall. The water supply pipe can adopt the drip irrigation technology to realize the long-term nutrition and water supply to the slope vegetation, and ensure the long-term stable greening and reinforcement effect of the slope. When it rains, rainwater on the surface of the slope can also penetrate into the nutrient soil in the geogrid to provide water for plant growth.

8] Plant seeds germinate and grow under the moisturization of rainwater and soil nutrients, and grow through the micro-holes on the surface of the geogrid to green the slope. When the plant completes the slope vegetation cover, the entire ecological protection system is formed.

Claims

An ecological geogrid for slope protection, characterized in that:

Mainly including the geogrid protective net, anchoring structure, nutrient soil (5), plant seeds (6), and several water pipes (8);

The geogrid protection net is composed of a crisscrossed tubular geogrid (2), which is fixedly laid on the surface of the slope (1) by an anchor structure;

The interior of the tubular geogrid (2) houses nutrient soil (5), plant seeds (6) and water pipes (8).

The water pipe (8) is located at the bottom of the inner cavity of the tubular geogrid (2) and is fixed to the inner wall of the tubular geogrid (2); the water pipe (8) has a plurality of drainage holes facing the upper wall ( 9);

The upper surface of the geogrid protective net has a plurality of plant growth holes (3); the plant growth holes (3) are through holes on the pipe wall facing upward of the tubular geogrid (2); The hole woven cloth (7) blocks the plant growth hole (3).
The ecological geogrid for slope protection according to claim 1, characterized in that the tubular geogrid is distributed with fine holes.
An ecological geogrid for slope protection according to claim 1 or 2, characterized in that the water pipes (8) in the tubular geogrid (2) are criss-crossed to form a water pipe (8) )Network Systems.
An ecological geogrid for slope protection according to claim 1 or 3, characterized in that the water pipe (8) is a hose.
An ecological geogrid for slope protection according to claim 1, wherein the anchoring structure comprises a plurality of soil nails. These soil nails fix the geogrid fence to the slope (1).
A method for constructing an ecological geogrid for slope protection according to any one of claims 1 to 5, characterized in that it comprises the following technical steps:

1) Produce a tubular geogrid in the factory, that is, a tubular geogrid net; there is a reserved hole in the middle of the geogrid net, which forms a network of hollow pipes that are criss-crossed, and the water pipe and the geogrid are fixed in the hole. Together, the water pipes form a crisscrossed water pipeline network system.

2) Prepare nutrient soil, which contains plant seeds and fertilizers for plant growth.

3) Fill the nutrient soil into the hole inside the geogrid.

4) Transport the ecological geogrid with water pipes and nutrient soil to the top of the slope.

5) Spread the geogrid net from top to bottom on the slope of the slope to cover the entire slope.

6) Fix the geogrid net on the slope by soil nails.

7] The water pipe passes through the water to make the nutrient soil moist, and ensure the water required for the germination and growth of the plant seeds. The water flow is flexibly adjusted according to the local rainfall.

8] Plant seeds germinate and grow under the moisturization of rainwater and soil nutrients, and grow through the micro-holes on the surface of the geogrid to green the slope.