CN105684591A - Ecological protection structure suitable for south rack slope drainage waterlogging prevention - Google Patents

Abstract

The invention relates to an ecological protection structure suitable for drainage and waterlogging prevention of rocky slopes in the south, and belongs to the technical field of slope ecological protection. It is mainly composed of three functional layers: drainage cushion layer, foreign soil planting layer and protective net layer. It is characterized in that a drainage cushion is laid on a smooth rocky slope, a seedling soil planting layer is sprayed on the drainage cushion, and a protective net layer is laid on the surface of the guest soil planting layer. The protective net surface layer is provided with a protective net and a vertical slope. anchoring components. The specific construction steps of the present invention are: leveling the slope, laying a drainage cushion, laying a plastic galvanized mesh and spraying the planting layer of foreign soil, laying a protective mesh layer and fixing it with anchor components, covering the non-woven fabric for irrigation and maintenance, and timely treating the foreign soil For drainage or water storage regulation. The invention uses a wide range of materials, simple construction technology, easy operation and implementation, can effectively realize drainage and waterlogging prevention of rock slopes in rainy seasons, and enhance the benefits of water and soil conservation and ecological restoration of slope plants.

Description

An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south

technical field

The invention belongs to the technical field of slope ecological protection, and in particular relates to an ecological protection structure suitable for drainage and waterlogging prevention of rocky slopes in southern China, especially suitable for drainage and waterlogging prevention of guest soil on the surface of rocky slopes in areas with continuous high temperature and rainy seasons in southern China.

Background technique

With the rapid development of infrastructure construction such as my country's high-speed, railway, and water conservancy projects, the ecological protection and management of a large number of rocky slopes are often involved in the process of engineering construction. Usually, the original vegetation on the surface of this type of rocky slope is damaged to varying degrees, and water and soil erosion occurs frequently. At present, the foreign soil spraying and regreening construction technology widely used in the industry, the main technical steps are: first spray a layer of foreign soil in the rock slope lattice beam frame that has been hung with nets, and then spray the planting matrix to complete the vegetation. The process of cultivating or filling regreening is relatively simple. At this stage, the focus of relevant research is mainly on how to improve the water retention performance of foreign soil on the surface of rocky slopes, but there are few reports on the drainage and waterlogging prevention of foreign soil on the surface of rocky slopes.

The main characteristics of the rainy season in the southern region are: long rainy season, heavy rainfall, and simultaneous rain and heat. Because most of the methods of conventional alien soil spraying and regreening do not set up drainage structures on rocky slopes, under the condition of continuous rainfall, the water flow on rocky slopes lacks corresponding channeling channels, which will easily lead to excessive water absorption by surface alien soil and soil accumulation. The water phenomenon is serious. Soaking in accumulated water for a long time reduces the cohesion of the soil, causing the foreign soil to slide and collapse, resulting in soil erosion. At the same time, the root system of vegetation is soaked in water for a long time, and it is easy to rot, thus causing "water damage". In addition, in hot and rainy weather, long-term water accumulation in the soil is easy to breed fungi, leading to "fungal damage" and death of vegetation, which affects the ecological protection effect of slopes. Therefore, in view of the climate characteristics of long rainy season, heavy rainfall, and simultaneous rain and heat in the southern region, it is necessary to fully consider the problem of drainage and waterlogging of rocky slopes during the rainy season when carrying out ecological protection on rocky slopes.

In the rainy season, although the drainage ditches on the slope can timely divert the slope runoff, it occupies the green area of the slope, increases the project cost and construction difficulty, and the drainage ditches need to be dredged and maintained regularly in the later stage. In the dry season, the moisture of the foreign soil on the slope is easily drained through the ditches, and it is impossible to ensure that the soil can retain enough water for the growth of vegetation. Therefore, it is particularly necessary to design an ecological protection structure for rock slopes that can effectively guide water flow in the rainy season and maintain soil moisture in the dry season.

Contents of the invention

In order to solve the above-mentioned deficiencies in existing applications, the present invention provides an ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south, which not only has good functions in dredging slope water flow, stabilizing slope soil, and protecting vegetation in rainy seasons In addition, it can effectively maintain slope soil moisture and maintain the normal growth of vegetation in the dry season.

For reaching the purpose of the present invention, adopt technical scheme as follows:

An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south, mainly composed of three functional layers: a drainage cushion layer, an alien soil planting layer and a protective net layer. It is characterized in that: laying a layer of drainage cushion on the smooth rocky slope, spraying the podcast soil planting layer on the drainage cushion, laying a protective net layer on the surface of the foreign soil planting layer, and setting a vertical slope on the surface of the protective net layer The anchoring member makes the anchoring member penetrate the guest soil planting layer and drainage cushion, and enters the rocky slope.

The drainage cushion is mainly made of cement mortar and crushed stones, which are evenly laid. The bottom of the drainage cushion is equipped with a PVC pipe with a water guide hole as a drainage channel. The water guide hole of the PVC pipe is wrapped with non-woven fabric. Switch valve. Wherein, the switch valve passes through the foreign soil planting layer and is exposed on the surface of the protective net layer.

The guest soil planting layer is composed of humus soil, sawdust, organic fertilizer, soil adhesive, soil water retaining agent, and vegetation seeds. The thickness of the guest soil planting layer is 10cm; the guest soil planting layer is laid with plastic galvanized wire mesh with a diameter of 3mm , Mesh diameter 5cm × 5cm.

The protective mesh layer is laid by galvanized wire mesh, the diameter of the galvanized iron mesh is 1-2mm, and the mesh diameter is 1cm×1cm; the protective mesh layer is provided with anchoring components inserted vertically into the slope, which can effectively fix the protective mesh layer The surface of guest soil planting layer.

The specific construction and implementation process of the ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south includes the following steps:

The first step is to properly clear and level the smooth rocky slope.

The second step is to lay a drainage cushion on the rocky slope.

The third step is to lay a layer of plastic-coated galvanized mesh on the surface of the drainage cushion, fix it with steel nails, and spray the guest soil planting layer containing humus soil, sawdust, organic fertilizer, soil adhesive, soil water-retaining agent, and vegetation seeds .

The fourth step is to lay the protective net layer, and use anchor components to penetrate the guest soil planting layer and drainage cushion into the rocky slope, and fix the protective net.

The fifth step is to cover the non-woven fabric and irrigate and maintain the slope.

The sixth step is to timely open or close the switch valve of the PVC pipe in the drainage cushion according to the rainfall conditions on the slope surface and the water content of the soil to realize the regulation of the drainage or water storage of the guest soil on the slope surface.

Advantage and beneficial effect of the present invention are:

(1) Through the drainage cushion, effective drainage can be achieved, and water accumulation can be avoided in the slope soil during the rainy season, thereby reducing the probability of vegetation root system being soaked in water and rotting, as well as "water damage" and "fungal damage". At the same time, laying a drainage cushion made of cement mortar and crushed stone on the smooth slope is conducive to improving the friction coefficient of the slope, increasing the friction between the soil and the slope, removing water in time, reducing the weight of the soil, and avoiding The soil holds too much water and slips, which is conducive to stabilizing the foreign soil on the slope.

(2) A PVC drainage pipe with a switch valve is installed in the drainage cushion as a drainage channel. The wall of the PVC drainage pipe is provided with small seepage holes, and the surface is wrapped with a layer of non-woven fabric, which can effectively isolate soil particles and filter water in the drainage cushion. Prevent the drainage channel from being blocked due to the entry of soil particles; the PVC drainage pipe is equipped with a switch valve, which can be opened in the rainy season to dredge the excess water flow of the guest soil, and can be closed in the dry season to store water for the guest soil layer for vegetation growth. In order to achieve effective control of slope drainage and water storage.

(3) The guest soil planting layer is composed of humus soil, sawdust, organic fertilizer, soil binder, soil water retaining agent, and vegetation seeds, and the plastic galvanized mesh is laid inside, which can provide a better growth environment for slope protection vegetation.

(4) The outside of the guest soil planting layer is laid with a diameter of 1-2mm and a galvanized wire mesh with a mesh diameter of 1cm×1cm. It has the effect of a net pocket on the guest soil on the slope, which can prevent the soil from slipping due to excessive water holding capacity due to continuous rainfall. It can also avoid the over-encapsulation of the surface layer of guest soil and affect the growth of vegetation.

(5) The materials used in the present invention have wide sources, simple construction technology, and easy operation and implementation.

Instructions attached

Fig. 1 is a sectional view of the present invention after implementation.

Among them: 1-protective net layer; 2-plastic galvanized wire mesh in the guest soil planting layer; 3- guest soil planting layer; 4-PVC drainage pipe switch valve; 5-PVC pipe; 6-anchoring in the protective net layer Component; 7-drainage cushion; 12-rock slope.

Fig. 2 is a plane structure diagram of the drainage cushion layer of the present invention.

Among them: 8-gravel; 9-cement mortar.

Figure 3 is a schematic diagram of the PVC pipe in the drainage cushion.

Among them: 10-the non-woven fabric wrapped on the outer wall of the PVC drainage pipe; 11-the water guide hole on the wall of the PVC drainage pipe.

detailed description

The structure of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the technical solutions of the present invention in more detail, but not to limit the protection scope of the present invention.

An ecological protection structure suitable for drainage and waterlogging prevention of rocky slopes in the south. The structure is mainly composed of three functional layers: a drainage cushion layer 7 , an alien soil planting layer 3 and a protection net layer 1 . It is characterized in that: a layer of drainage cushion 7 is laid on the smooth rocky slope, podcast soil planting layer 3 is sprayed on the drainage cushion 7, and a protective net layer 1 is laid on the surface of the guest soil planting layer 3, and the protective net layer 1 An anchoring member 6 with a vertical slope is arranged on the surface, so that the anchoring member 6 penetrates the soil planting layer 3 and the drainage cushion layer 7 and enters the rocky slope.

In practical application, the specific construction process of the above-mentioned ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south is as follows:

The thickness of the drainage cushion 7 is about 5 cm and can be adjusted according to the engineering geological conditions of the slope. The drainage cushion 7 is formed by mixing and stirring gravel 8 and cement mortar 9. The bottom of the drainage cushion 7 is provided with a PVC pipe with a switch valve. 5, as a drainage channel, can effectively improve the drainage conditions of the rocky slope 12, increase the friction coefficient of the smooth rocky slope 12, and improve the stability of the foreign soil on the slope. The PVC pipe 5 port has a switch valve 4, and the switch state can be selected according to the water content of the slope soil soil. The side wall of the PVC pipe 5 has a water guide hole 11, and the outside of the water guide hole is wrapped by a non-woven fabric 10, which can effectively isolate the soil and filter excess water in the soil to prevent the PVC pipe 5 from being blocked. Wherein, the switch valve passes through the foreign soil planting layer and is exposed on the surface of the protective net layer.

The foreign soil planting layer 3 is composed of humus, sawdust, organic fertilizer, soil binder, soil water retaining agent, and vegetation seeds, and the thickness of the foreign soil planting layer 3 is 10 cm. The guest soil planting layer 3 is laid with a plastic galvanized wire mesh 2 with a mesh diameter of 3mm and a mesh diameter of 5cm×5cm.

The protective mesh layer 1 is formed by laying galvanized wire mesh, the diameter of the galvanized wire mesh is 1-2mm, and the mesh diameter is 1cm×1cm. The protective mesh layer 1 is provided with an anchor member 6 vertically inserted into the rock slope 12, which can effectively fix the protective mesh layer 1 on the surface of the guest soil planting layer 3.

The above-mentioned specific implementation is only a preferred embodiment of the present invention, and is not used to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the contents of the patent protection scope of the present invention should include Within the scope of the patent application of the present invention.

Claims (6)

1. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south, characterized in that it consists of three functional layers: a drainage cushion, an alien soil planting layer, and a protective net layer; the drainage cushion is laid on a smooth On rocky slopes, spray podcaster soil planting layer on the drainage cushion, and then lay a protective net layer on the surface of the foreign soil planting layer, and set an anchoring member on the vertical slope on the surface of the protective net layer, so that the anchoring member penetrates the guest soil The planting layer and the drainage cushion enter the rocky slope. 2. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south according to claim 1, characterized in that: the drainage cushion is mainly composed of cement mortar and crushed stones, which are evenly laid . 3. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south according to claim 1, characterized in that: PVC pipes with water guide holes are arranged at the bottom of the drainage cushion as drainage channels. 4. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south according to claim 3, characterized in that: the water guide hole of the PVC pipe at the bottom of the drainage cushion is wrapped with non-woven fabric. 5. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south according to claim 3, characterized in that: the PVC pipe port at the bottom of the drainage cushion is provided with a switch valve, and the switch valve passes through the guest soil planting layer , exposed on the surface of the protective mesh layer. 6. An ecological protection structure suitable for drainage and waterlogging of rocky slopes in the south according to claim 1, characterized in that: the protective net layer is made of galvanized wire mesh, and the diameter of the galvanized wire mesh is 1-2mm. The mesh diameter is 1cm×1cm.