道路工程专业外文翻译---软土路基处理方法概述(编辑修改稿)

道路工程专业外文翻译---软土路基处理方法概述(编辑修改稿)内容摘要：

y years of experience in construction and related experts and scholars discussed summarized as follows: A replacement cushion method When the thickness of the soft soil, soft soil below the subgrade surface within part or all of the excavation, then change to fill the greater intensity of soil or other stability, nonerosive materials (usually good water permeability in coarse sand) called Replacement Cushioning. This economical and practical method to deal with the height of 2 to 3m, if the thickness of the soft soil is too large, then using the replacement method will increase the disposable side and dug side content and increase the cost of the project. Replacement higher shear strength of soil, so as to achieve the goal of enhanced foundation bearing capacity to meet the requirements of the structures on the foundation. Reinforcement Method Replacement, Stone Fill, cushion, COMPACTED silt several. Cushioning according to the different materials can be divided into the sand (gravel) cushion, gravel pads, fly ash cushion, the cushion of dry residue, soil (dust, ash) cushion. Representatives of sand cushion method and replacement method. Gravel cushion: when the embankment height is less than 2 times the limit height, soft soil layer is thin, the filling material is more difficult, or rainy season, construction, gravel (sand) cushion between the fill and the basement to set up a drainage face, so that the foundation by filling load in the foundation soil pore water discharge speed to accelerate the consolidation to improve the bearing capacity of foundations, reduce sedimentation, to prevent the foundation of local shear deformation. Pay attention to controlling the filling speed, the materials used to clean coarse sand with mud is not more than 5%, or maximum particle size less than 5cm natural gradation gravel. Replacement Method: water permeability material (gravel or crushed stone) in the soft soil thickness is not greater than 2m, filling replacement can reduce the pression to increase bearing capacity, shear strength, and reduce the settlement to improve the dynamic characteristics accelerate soil consolidation by drainage. It is characterized by the construction process is simple, but the cost is relatively high. Stone Fill: When the soft soil or marsh soil located underwater, replace the soil construction difficulties, and the thickness is less than 3m, the surface without a hard shell, the substrate water content over liquid limit, embankment above the weight of the soft soil that can be squeezed out, drainage more difficult when using cast stone tablets (diameter generally less than 30cm) to squeeze the deposition method. Start from the middle of the rubble, gradually extending to the sides, out of mud, to improve the subgrade strength. 2 deep paction The use of blasting, pacting, extrusion and vibration and join the high shear strength of materials, etc., the foundation of deep soft soil density vibration and paction of the foundation reinforcement method is called deep paction. For soft soil thickness 3m thick soft soil reinforcement, distribution of a wide area of soft Reinforcement processing, has consolidated its depth is up to 30m. Vibration, squeezing ground Turkey body dense consolidation, and added with high shear strength of the pile material replacement of part of the soft soil of the threephase (gas, liquid a。