CN205776070U - Ecological revetment is combined retaining wall structure - Google Patents

Abstract

The utility model discloses an ecological slope protection compound retaining wall structure, which comprises an ecological steep slope and a foundation retaining wall built along the reservoir bank slope, the ecological steep slope is located above the normal water storage level, and the foundation retaining wall is located at the normal Below the water storage level; the foundation retaining wall includes a stepped foundation of the retaining wall and a wall body of the retaining wall, the body of the retaining wall is located on the stepped foundation of the retaining wall, and the stepped foundation of the retaining wall Placed on moderately weathered bedrock below the trench excavation line. The utility model can be applied to geological conditions with large water level fluctuations and steep slopes; it not only occupies a small flood control storage capacity of the reservoir, but also can be soaked in water for a long time.

Description

Composite retaining wall structure for ecological slope protection

technical field

The utility model relates to a side slope retaining structure, in particular to an ecological slope protection compound retaining wall structure.

Background technique

In water conservancy and hydropower projects, in order to meet the needs of flood control and power generation, the water level of the general reservoir varies greatly, and the flood control storage capacity of the reservoir cannot be encroached on much; for mountainous reservoir areas, the slope of the reservoir bank is steep. Therefore, the construction of roads along the river in Chengji towns in the reservoir area will be affected by various factors such as large fluctuations in the water level of the reservoir, poor geological conditions on the banks of the reservoir, and limited flood control capacity of the reservoir. Therefore, it is very important to choose appropriate road subgrade support measures in the riverside area of the reservoir area.

In the traditional retaining structure, backfilling with non-reinforcing ribs requires a large amount of earth and stone backfilling, and the project occupies a large area, so it will occupy a large flood control storage capacity of the reservoir and have a great impact on flood discharge; Although slopes can be used on steep slope banks and occupy a small reservoir capacity for flood control, they have poor water resistance due to long-term immersion, so they are not suitable for the riverside area of the reservoir; traditional plant protection has poor erosion resistance. And it is not suitable for steep and long-term flooded slopes; the traditional retaining wall support wall structure is large in size and high in cost. Although it is stable, the urban landscape effect is poor, and the applicability to the riverside area of the reservoir is also poor. .

To sum up, it is necessary to build a slope retaining structure in the riverside area of the reservoir, which can not only be applied to steeper slopes, but also occupy a small flood control storage capacity of the reservoir, and can also be immersed in water for a long time. In addition, for the above-mentioned slope retaining structure, its erosion resistance and rain resistance are better, and it is better to improve the urban landscape effect.

Contents of the invention

The purpose of this utility model is to provide an ecological slope protection composite retaining wall structure, which can be applied to geological conditions with large water level fluctuations and steep slopes; it not only occupies a small flood control storage capacity of the reservoir, but also can be soaked in in the water.

In order to achieve the above purpose, the ecological slope protection composite retaining wall structure designed by the utility model includes an ecological steep slope and a foundation retaining wall built along the reservoir bank slope, and its special feature is that the ecological steep slope is located above the normal water storage level , the foundation retaining wall is located below the normal water storage level; the foundation retaining wall includes a stepped foundation of the retaining wall and a wall body of the retaining wall, and the body of the retaining wall is located on the stepped foundation of the retaining wall , the stepped foundation of the retaining wall is placed on the moderately weathered bedrock below the excavation line of the foundation trench.

Further, the ecological steep slope is formed by layered backfilling and rolling of multiple layers of fillers, and a geogrid is laid between the two adjacent layers of fillers.

Furthermore, the backfilling of the water-facing side of the multi-layer packing forms a stepped slope, and multiple L-shaped panels are arranged side by side on the water-facing side of each layer of packing; the long sides of each L-shaped panel are Insert between corresponding adjacent two layers of fillers, the short side of each L-shaped panel faces upwards; the short side of each L-shaped panel and the water side of the corresponding layer of fillers are filled with cultivated soil , plants are planted in each layer of cultivated soil, and each layer of plants forms a vegetation protection surface.

Still further, crushed stones are laid on each layer of cultivated soil.

In the above technical solution, the foundation retaining wall further includes gravel filler, and the gravel filler is located below the ecological steep slope and arranged between the body of the retaining wall and the excavation line of the foundation trench.

Further, the retaining wall body is provided with a plurality of drain holes, and each drain hole connects the outer side of the retaining wall body close to the water area and the inner side close to the excavation line of the foundation trench.

Furthermore, clay is filled between the gravel filler and the stepped foundation of the retaining wall, and the clay is located between the wall body of the retaining wall and the excavation line of the foundation trench; between the gravel filler and the ecological steep slope Set with clay water barrier.

Still further, a reverse filter layer is arranged between the retaining wall body and the gravel filler.

Still further, the stepped foundation of the retaining wall is anchored in stages along the excavation line of the foundation groove through anchor rods.

Still further, the outer side of the stepped foundation of the retaining wall near the water area is backfilled with original soil.

In the ecological slope protection composite retaining wall structure designed by the utility model, it is divided into an ecological steep slope and a foundation retaining wall. Since the ecological steep slope should not be soaked in water for a long time, it is set above the normal water storage level, and the foundation The retaining wall is set below the normal water storage level and can be soaked in water for a long time. Traditional grading structures need to be backfilled to the intersection with the bank slope surface. For steeper bank slopes, the toe of the grading is far away, and such a structure will occupy a large flood control storage capacity. Therefore, in the utility model, the foundation retaining wall is arranged on the bank slope, wherein the stepped foundation of the retaining wall is built on the moderately weathered bedrock. The impact of water on engineering construction. The basic retaining wall includes a stepped foundation of the retaining wall and a body of the retaining wall, and the body of the retaining wall is arranged on the stepped foundation of the retaining wall. Setting the stepped foundation of the retaining wall under the retaining wall can not only make the whole structure of the retaining wall stable, but also under the geological conditions of steep slope, the stepped foundation of the retaining wall can better adapt to the terrain. Reduce the structural size of the retaining wall. The combination of the ecological steep slope and the foundation retaining wall makes the entire retaining structure occupy less flood control storage capacity and have better benefits.

In the utility model, the ecological steep slope is formed by layered backfilling and rolling of multiple layers of fillers, and geogrids are laid between adjacent two layers of fillers. The geogrid can produce better friction and bite action between the filler and the filler, thus providing lateral tension for the filler. When the filler deforms, the geogrid will generate lateral tension to prevent further deformation and development of the filler, thereby improving the stability of the ecological steep slope itself, reducing the earth pressure on the foundation retaining wall under the ecological steep slope, and ultimately improving the ecological slope protection. Stability of retaining wall structures.

The L-shaped panel not only stabilizes the slope of the ecological steep slope, but also provides a foundation for laying the vegetation protection surface. When using traditional methods to lay plant protection, plants such as turf and shrubs are usually planted directly on the slope. When washed by rain or flood, the plants planted along the slope are easy to be washed away by the water flow, and the anti-scouring ability is poor. However, in the present utility model, the slope of the ecological steep slope is a stepped slope, and plants are planted on the filler on the water side of each layer of L-shaped panels to form a vegetation protection surface. The long side of the L-shaped panel is inserted between the two layers of fillers, and the short side faces upwards, so each layer of cultivated soil is arranged horizontally, so that the plants in each layer of cultivated soil are planted horizontally. The vegetation protective surface formed by the above structure is planted along the stepped plane, so the anti-scouring ability is better. The gravel laid on each layer of cultivated soil is to better prevent the loss of cultivated soil and further improve the anti-scouring ability of the vegetation protection surface.

Backfilling with gravel filler behind the retaining wall increases the strength of the filler, thereby reducing the earth pressure on the foundation retaining wall, which is beneficial to reducing the structural size of the retaining wall. Setting drainage holes in the wall body of the retaining wall and setting a reverse filter layer behind the wall can effectively drain the groundwater behind the wall and reduce the influence of groundwater on the stability of the wall body of the retaining wall. Clay is filled between the gravel filler and the stepped foundation of the retaining wall to prevent groundwater in the gravel filler from penetrating downward into the stepped foundation of the retaining wall and affecting the stability of the stepped foundation of the retaining wall. The clay water-resisting layer set between the gravel fill and the ecological steep slope is to discharge the groundwater in the ecological steep slope directly into the outer waters, preventing groundwater from flowing downward into the gravel fill and affecting the stability of the retaining wall.

The anchor rods in the stepped foundation of the retaining wall make the stepped foundation of the retaining wall more stably combined with the bank slope rock formation. The water side of the stepped foundation of the retaining wall is backfilled with original soil. When the water level of the reservoir drops, part of the foundation retaining wall will be exposed, and the original soil will be backfilled to the outside of the stepped contact of the retaining wall, which not only makes the structure of the retaining wall beautiful, but also provides a hydrophilic platform. After the construction of the retaining wall structure described in the utility model is completed, not only a sidewalk can be formed on the horseway on the top of the foundation retaining wall, but also a sidewalk can be formed on the backfilled original soil. In this way, when the water level is low, people can also move around the area close to the water.

In summary, the ecological slope protection composite retaining wall structure designed by the utility model has the following advantages:

1. It can be applied to geological conditions with large water level fluctuations and steep slopes;

2. The flood control storage capacity of the reservoir is small;

3. Can be soaked in water for a long time;

4. The formed vegetation protection surface has beautiful appearance and good erosion resistance;

5. The structure is stable, the cost is low, and the practicability is strong.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a cross-sectional enlarged structural schematic diagram of the water side of the ecological steep slope in the utility model.

In the figure: stepped foundation of retaining wall 1, anchor rod 2, wall body of retaining wall 3, clay 4, drainage hole 5, reverse filter layer 6, gravel filling 7, clay water-resistant layer 8, geogrid 9, Filler 10, L-shaped panel 11, original ground line 12, original soil 13, foundation trench excavation line 14, cultivated soil 15.

detailed description

The implementation of the utility model will be described in detail below in conjunction with the accompanying drawings, but it does not constitute a limitation of the utility model, and it is only used as an example. At the same time, through explanation, the advantages of the utility model will become clearer and easier to understand.

As shown in Figure 1, the ecological slope protection composite retaining wall structure described in the utility model is built along the bank slope of the reservoir, including the ecological steep slope and the foundation retaining wall built under the ecological steep slope. The ecological steep slope is above the normal water storage level, and the foundation retaining wall is below the normal water storage level. The foundation retaining wall includes a stepped foundation 1 of the retaining wall, a body of the retaining wall 3 and a gravel filler 7 . The stepped foundation 1 of the retaining wall is set at the bottom of the entire retaining wall structure, under the retaining wall body 3 and above the weathered bedrock, and is anchored along the excavation line 14 of the foundation groove by the anchor rod 2 . Original soil 13 is backfilled on the water-facing side of the stepped foundation 1 of the retaining wall. The retaining wall body 3 arranged on the stepped foundation 1 of the retaining wall is a counterweight type retaining wall body (also can be a buttress type retaining wall body, a cantilever type retaining wall body, etc.), The backfill of the retaining wall body 3 is backfilled with gravel filler 7 so that the gravel filler 7 is filled between the retaining wall body 3 and the excavation line 14 of the foundation trench. Clay 4 is used to seal between the gravel filler 7 and the stepped foundation 1 of the retaining wall, so as to prevent groundwater in the gravel filler 7 from infiltrating into the stepped foundation 1 of the retaining wall. The retaining wall body 3 is provided with a plurality of drain holes 5, and each drain hole 5 connects the inner side of the retaining wall body 3 near the gravel filler 7 with the outer side near the water area, so that the groundwater in the gravel filler 7 flow out. Between the wall body 3 of the retaining wall and the gravel filler 7, an anti-filter layer 6 for preventing the gravel from entering the drainage hole 5 is arranged. A clay water-resisting layer 8 is laid between the gravel filling 7 and the ecological steep slope to separate the ecological steep slope from the foundation retaining wall and prevent underground water in the ecological steep slope from infiltrating into the foundation retaining wall.

As shown in Figure 2, the ecological steep slope is formed by layered backfilling and rolling of multiple layers of filler 10. The side of the filler 10 close to the water surface is stacked to form a stepped slope with a slope ratio of 1:0.5-1:1. The filler 10 is gravel, and a layer of geogrid 9 is laid between two adjacent layers of filler 10 . The geogrid 9 extends from one side of the slope to the side close to the excavation line 14 of the foundation trench. The layer spacing between the geogrids 9 on adjacent sides is 0.3-0.6m. A plurality of L-shaped panels 11 are arranged side by side on the water side of each layer of packing 10 . The L-shaped panel adopts reinforced concrete structure, the length is 30-50cm, the thickness is 8-12cm, the height and width can be adjusted according to the slope, and the side is provided with concave-convex grooves. Two adjacent L-shaped panels 11 in the same layer are fitted and connected through concave-convex grooves provided on both sides of the L-shaped panels 11 , which increases the overall fastness of the L-shaped panels 11 . The long sides of each L-shaped panel 11 are inserted between corresponding two adjacent layers of fillers 10, and the short sides thereof all face upward. Cultivation soil 15 is filled between the short side of each L-shaped panel 11 and the water-facing side of a corresponding layer of filler 10 . Plants are planted in each layer of cultivated soil 15, and each layer of plants forms a vegetation protection surface 16. On every layer of cultivated soil 15, gravel is all paved.

During the construction process of the ecological slope protection composite retaining wall structure, it is divided into two parts: the basic retaining wall project and the ecological steep slope project. The specific construction steps are as follows:

Step 1. Excavate the original ground line 12 to form the excavation line 14 of the foundation trench. The excavation line 14 of the foundation trench is close to the rock-soil boundary line, and implement the anchor bolt 2 at the same time; after completion, pour the stepped foundation 1 of the retaining wall, and the anchor bolt 2 Use full-length bonded cement mortar anchor rod, the drilled hole is inclined 15° to the horizontal, and the diameter of the anchor hole is 75mm;

Step 2. After pouring the stepped foundation 1 of the retaining wall, pour the retaining wall body 3 and bury the drain hole 5. The drain hole 5 uses a φ100 PVC pipe with a spacing of 2×2m and is arranged staggered up and down;

Step 3: pouring the wall body 3 of the retaining wall to a certain height, the clay 4 can be backfilled, and the original soil 13 can be backfilled at the same time;

Step 4: After the retaining wall body 3 is poured, backfill the anti-filter layer 6 and the gravel filler 7, and the drainage anti-filter layer 6 is composed of crushed stones with a thickness of 50 cm and an outsourcing geotextile;

Step 5, lay clay water-resisting layer 8 on the top of gravel filling 7, so far the foundation retaining wall project of the first part is completed;

Step 6. After the basic retaining wall project is completed, start the ecological steep slope project; simultaneously carry out the laying of geogrid 9, the backfill of filler 10 and the installation of L-shaped panel 11, and then plant grass or plant low-rise on the L-shaped panel 11 Shrubs, thereby forming the vegetation cover 16.

Other unspecified parts are prior art.

Claims (10)

1. A composite retaining wall structure for ecological slope protection, comprising an ecological steep slope and a foundation retaining wall built along the bank slope of the reservoir, characterized in that: the ecological steep slope is located above the normal water storage level, and the foundation retaining wall is located at Below the normal water storage level; the foundation retaining wall includes a stepped foundation (1) and a retaining wall body (3), and the retaining wall body (3) is located at the stepped foundation of the retaining wall ( 1), the stepped foundation (1) of the retaining wall is placed on the moderately weathered bedrock under the excavation line (14) of the foundation trench. 2. The ecological slope protection composite retaining wall structure according to claim 1, characterized in that: the ecological steep slope is formed by layered backfilling and rolling of multiple layers of fillers (10), and the adjacent two layers of fillers (10) ) is laid with a geogrid (9). 3. The ecological slope protection composite retaining wall structure according to claim 2, characterized in that: the backfilling of the water-facing side of the multi-layer filler (10) forms a stepped slope, and the adjacent surface of each layer of filler (10) Multiple L-shaped panels (11) are arranged side by side on the water side; The long sides of each of the L-shaped panels (11) are inserted between corresponding adjacent two layers of fillers (10), and the short sides of each of the L-shaped panels (11) face upward; Cultivation soil (15) is filled between the short side of each L-shaped panel (11) and the water-facing side of the corresponding layer of filler (10), and plants are planted in each layer of cultivation soil (15) , the plants of each layer form the vegetation protection (16). 4. The ecological slope protection composite retaining wall structure according to claim 3, characterized in that: gravel is laid on each layer of cultivated soil (15). 5. The ecological slope protection composite retaining wall structure according to any one of claims 1 to 4, characterized in that: the foundation retaining wall also includes gravel filler (7), and the gravel filler (7) It is located below the steep ecological slope and is arranged between the retaining wall body (3) and the excavation line (14) of the foundation trench. 6. The ecological slope protection composite retaining wall structure according to claim 5, characterized in that: a plurality of drainage holes (5) are arranged in the body of the retaining wall (3), and each drainage hole (5) ) are all connected to the outer side of the retaining wall body (3) near the water area and the inner side near the foundation trench excavation line (14). 7. The ecological slope protection composite retaining wall structure according to claim 6, characterized in that: clay (4) is filled between the gravel filler (7) and the stepped foundation (1) of the retaining wall, and the The clay (4) is located between the retaining wall body (3) and the foundation trench excavation line (14); and a clay water-resisting layer (8) is arranged between the gravel filling (7) and the ecological steep slope. 8. The composite retaining wall structure for ecological slope protection according to claim 7, characterized in that: a reverse filter layer (6) is arranged between the retaining wall body (3) and the gravel filling (7). 9 . The ecological slope protection composite retaining wall structure according to claim 8 , characterized in that: the stepped foundation ( 1 ) of the retaining wall is anchored in stages along the excavation line ( 14 ) of the foundation trench through anchor rods ( 2 ). 10. The composite retaining wall structure for ecological slope protection according to claim 9, characterized in that: the outer side of the stepped foundation (1) of the retaining wall near the water area is backfilled with original soil (13).