基坑支护工程c、φ值测定方法探讨

Disscussion about methods of measuring the value of c and φ in retaining and protecting for foundation excavation

通过采取土样进行试验,由直剪和三轴剪切试验在不同排水固结条件下,结合基坑土体的应力历史和应力路径,得出不同的c、φ值参数,并对其差异性作了对比分析,提出了不同基坑侧壁所应采取的实验方法,及对常规试验方法的改进提出了一些建议.

Through direct shear test and triaxial shear teast under different conditions of drainage and consolidation,different value of shearing strength parameters c and φ are obtained in the light of stress history and stress path of soil mass in foundation pit.By comparing the diversity of value of c and φ ,available test methods for different side of foundation pit are put forward,and some suggestions to improve routine test methods are offered.