精品文档中文3700字Soil nail wall, also known as soil nailing technology, which is installed in situ soil with a relatively dense soil nails, and soil slope surface of sprayed concrete to build a steel mesh surface layer, through the soil nails, the surface layer and in-situ soil the role of the three common slope or retaining wall side. Soil nail walls but also poses a similar gravity in situ reinforced earth retaining structures. And supporting a variety of methods have been compared, it has the construction easy, simple equipment, require little space, excavation and supporting jobs can be parallel, the overall progress of the fast, low cost, as well as pollution, low noise, stable and reliable, social and economic good, and many other advantages, and therefore at home and abroad with the foundation pit slope reinforcement has been widely applied rapidly. Soil nail wall construction technology is a top-down step by step build process, according to the following order: According to design requirements for excavation face, trimmed slope, planted sprayed concrete thickness control signs; jet first layer of concrete; erection of drilling soil nails, grouting, erection of connectors; banding steel net, spray a second layer of concrete; set top of the hill, slope and the foot of the slope of the drainage system. Soil-nailed law-enforcement: keep as much as possible, significantly higher maximum use of pit wall side of inherent mechanical strength of soil, changing soil structure and system load as part of the bracing. Sprayed concrete under the effect of high pressure gas flow, wherein high-speed soil surface layer and the soil in the spray created between embedded solid-effect, and gradually form a completely closed with the excavation shoring systems, spray layer and mounted with a protective layer of and reinforcement of topsoil, so that to avoid exposure to wind and rain erosion, shallow collapse, local spalling, as well as the role of impermeable impermeable. Soil nailing a special control pressure grouting can be reinforced medium greatly improved physical and mechanical properties make it become a new geological body, its solid-solid in the slip plane the deep section of the soil outside the house, its external fixed terminal Spray the surface layer in conjunction with the network as a whole may be a tendency to instability in the side wall transferred to the solid-section and its vicinity and to eliminate. Reinforced Mesh sprayed layer can have a better integrity and flexibility, can effectively adjust the spray layer and the stress distribution within the soil nail. Active soil nail retaining soil and with soil together with construction of simple, rapid and timely, flexible applicability, with the digging with sticks, safe and economic characteristics. Its duration is generally poorer than the traditional method to save more than 30-60d, engineering, low cost and 10% -30%, supporting the maximum vertical pit depth has now reached 21.5m, built mud (local miscellaneous fill) pit depth of 10m. This method not only effectively be used for general geotechnical deep excavation shoring, often also used a number of other ancillary support measures, can effectively be used for supporting streaming sand, silt, complex filling, saturated soil, soft soil, etc. adverse geological conditions of the deep excavation. In addition, it is also rapid, reliable and economical method of using the traditional method or improved facilities to be made or have been carried out rescue excavation instability reinforcement. Of soil nailing and reinforced soil and anchor it seems such as retaining structures, however, the structure of soil nailing and reinforced earth construction, etc. There are many different points, and anchor. First of all, soil nailing and reinforced soil slope or retaining wall is not the same, mainly reflected in: the construction in different ways. Soil-nailed construction of the distribution of expansion from top to bottom, side excavation while retaining full use of undisturbed soil strength. Reinforced earth structure from bottom to top filling layered construction, filling choice, density and intensity can be controlled; reinforced pull the biggest changes in body pattern is different. In the reinforced earth structure, the general body at the bottom of the tendon force maximum. In the structure of soil nailing, the general range of the central part of the largest force of soil nail, the upper and bottom of the soil nail force small; different deformation properties. Soil Nailing the maximum displacement occurred in the supporting slope at the top or near the top, reinforced earth structure, the maximum displacement at the bottom. Secondly, soil nailing and bolting or retaining wall is not the same, mainly due to: the various parts of the force and the same role. Bolting or retaining wall of the anchor generally anchorage section and free above, the use