深基坑土参数试验方法分析

Testing methods for soil coefficient used to deep foundation pit

针对深基坑工程设计中所需的各种土参数,特别是抗剪强度参数C和Φ值进行了分析,并依据不同的土体性质、排水条件和开挖条件,提出不同试验方法.结合具体工程实践,分析了选择试验方法时的各种影响因素,同时提出了评价深基坑支护工程勘察、设计时所需的特殊试验项目和用途.针对不同的施工条件和放工周期,充分考虑地层的变化对参数选取的重要意义。

The soil coefficients of deep foundation reinforcing engineering, especially soil shear strength index of C and φ value are analyzed,and the different testing methods are proposed according to various soil qualities, dewatering and excavating conditions.Combined with practical engineering,the affectted facters are analyzed on selecting the test method,and some particular test contents are proposed.It is improtant for selecting fator to different construction condition and period.All the conculsions has directive function for deep foundation pit reinforcing engineering in the future.