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对于地基主要受力层范围内既有杂填土,又局部存在软弱下卧夹层的复杂地质条件,设计上分别采用换填垫层法、调整基础底面积和高压喷射注浆法等不同的地基处理方法来满足上部结构对地基承载力和变形的要求。着重介绍了采用高压喷射注浆法处理软弱下卧夹层,在夹层高度内形成复合地基的设计和质量检验方法。
For the complex geological conditions that exist in the main bearing layer of the foundation, there are both existing miscellaneous fillings and partial weak interbeds, the different groundwork such as padding replacement method and adjustment of base area and high pressure jet grouting method are respectively designed Treatment methods to meet the superstructure on the foundation bearing capacity and deformation requirements. In this paper, the design and quality inspection methods of high pressure jet grouting for the treatment of soft underlayer and the formation of composite foundation within the height of the interlayer are emphatically introduced.