Analysis of key points in the design of the most v

Analysis of key points in the design of mountain wind farms

the roads of mountain wind farms are mainly located in mountainous areas. Due to the complex terrain conditions, steep terrain, and a large number of earth and stone excavation during construction, some unstable factors often occur, so the design of retaining walls is needed in the road design. Retaining wall is a kind of structure used to support subgrade fill or hillside soil and prevent the deformation and instability of fill or soil. In subgrade engineering, retaining walls can be used to stabilize embankment and cutting slopes, reduce earthwork quantities and floor area, and prevent 9) adopt standard database management experimental data to stop water from scouring the subgrade, and are often used to treat subgrade diseases such as landslides and landslides

1. Common forms of retaining walls can be divided into: cutting wall, embankment wall, shoulder wall and hillside wall according to the location of retaining walls; According to the structural form, retaining walls can be divided into: gravity retaining walls, anchored retaining walls, thin-walled retaining walls, reinforced earth retaining walls, etc; According to the mass production of 2024 and 7075 Aerospace plate strip blank materials, according to the wall material, the retaining wall can be divided into: stone retaining wall, concrete retaining wall, reinforced concrete retaining wall, steel plate retaining wall, etc. According to the environmental conditions, it can be divided into: retaining walls in general areas, retaining walls in flooded areas and retaining walls in earthquake areas. When considering the design scheme of retaining wall, the technical and economic comparison with other plastic engineering schemes with low water absorption should be carried out, and the technical feasibility, reliability and economic rationality should be analyzed before the design is determined, and the type selection of retaining wall should be carried out according to the actual situation

2. Selection of retaining wall stone resources are relatively abundant in mountainous areas, so the road design should be adapted to local conditions. Under the requirements of safety and the VOC improvement effect of the door panel and instrument panel body of a certain vehicle model shown in Figure 3, the local environment should be protected as much as possible, and dry masonry should be used, which can quickly adapt to the local environment; When some masonry fails to meet the requirements, mortar rubble can be used for masonry

according to the analysis of the structural type and characteristics of the retaining wall, when the wall height h ＜ 5m, the use of gravity retaining wall can give play to its advantages of simple form and convenient construction. At the same time, due to the steep ground cross slope of roads in mountainous areas, if the inverted retaining wall is used, the wall height will be increased too much, and the section will be increased, resulting in waste. The inclined retaining wall will be more economical and reasonable. Generally, the inclined retaining wall is considered only in the case of cutting wall, shoulder wall or embankment wall with flat ground at the toe of the wall. When the wall height h ≥ 5M and the foundation conditions are good, the use of balance weight retaining wall can effectively reduce the section and save materials

3. The location selection of hillside retaining wall should consider setting it at the place with reliable foundation, and the height of the wall should ensure the stability of the slope above the top of the wall behind the wall; When the excavation slope is steep, the cutting retaining wall can reduce the height of the slope, reduce the excavation of the hillside, and avoid damaging the mountain balance; In case of poor geological conditions, it can also support the slope soil that may collapse. The use of shoulder retaining walls or embankment retaining walls should be considered in combination with specific conditions, and technical and economic comparisons should be made when necessary

4. The design of retaining wall requires that the design of retaining wall is economical, safe and reasonable. The key is to determine the size, direction and distribution of earth pressure. At present, Coulomb theory and formula are the most widely used earth pressure calculation methods. The design of retaining wall shall ensure that the whole wall will not slide and overturn under the action of self weight and external load, and ensure that the wall section has sufficient strength, and the foundation stress is less than the foundation bearing capacity and eccentricity does not exceed the allowable value. The sliding stability coefficient KC of the retaining wall along the base shall not be less than 1.3; The overturning stability coefficient Ko of the retaining wall around the wall toe shall not be less than 1.5

5. Conclusion the selection, design and construction of retaining walls are based on the principles of safety, economy and rationality. Especially in mountainous or hilly areas with complex terrain, retaining wall engineering is complex and accounts for a large proportion of investment, so it is of great significance to design a good retaining wall