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对于不排水抗剪强度不小于20kPa的粘性土、粉土、饱和黄土、人工填土和含有淤泥或硬土夹层的地基 ,用振冲置换法处理一般会获得满意的效果。但在施工中个别桩往往会出现质量问题 ,使局部地基承载力达不到设计要求 ,不得不返工补打 ,影响经济效益和施工进度。工程实践认为 ,只要注意以下几点 ,成桩的质量问题是可以避免的
For clayey soils with undrained shear strength of not less than 20 kPa, silt, saturated loess, artificial fill, and foundations containing silt or hard interlayer, vibratory displacement methods generally achieve satisfactory results. However, in the construction of individual piles often appear quality problems, so that the local foundation bearing capacity of less than the design requirements, had to fight back and fill, affecting economic efficiency and construction progress. Engineering practice that as long as the following points, pile quality problems can be avoided