复杂建筑场地土体抗剪强度参数新型原位测试试验研究

Experimental investigation into application of a new in-situ method for testing soil shear strength parameters to complex building sites

法国Phicometre钻孔线性剪切试验系统,为目前世界上最先进的新型体抗剪强度参数原位测试技术。选取云南数个复杂建筑场地,开展这一技术的工程应用研究,对不同成因、不同状态的黏土、粉质黏土、残积土、圆砾、全风化岩等抗剪强度参数进行了现场测试试验。试验结果表明,该技术能直接、连续、快速地测定土体抗剪强度参数;并且,获得的测试数据离散性小,线性相关度高,最低为0.95,平均达0.99。相比其他测试方法,测试结果较为可靠,可为该技术的推广应用和类似工程原位测试提供参照。

Several complex building sites are selected,and in-situ experiments for application of French Phicometre Borehole Linear Shear to soil shear strength test are conducted. Shear strength parameters of clay,silty clay,residual soil,round gravel and completely weathered rock and so on of different origins and conditions are tested in-situ. The experimental results show that soil shear strength parameters can be tested by this technique directly,continually and fast,and test datum obtained small discreteness and high linear correlation with minimum at 0. 95 and average value at 0. 99. Compared to other test methods,test results are more reliable,and can provide reference for popularization and application of this technique and in-site test of similar engineering.