土体抗剪强度参数的钻孔剪切试验方法初探

基金项目:

国家科技支撑计划项目(NO.2013BAJ06B01)

Study on Borehole Shear Test for Soil Shear Strength Parameter Testing

1. College of civil engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi China;
2. China JK Institute of Engineering Investigation and Design Co., Ltd, Xi'an 710043, Shaanxi, China;
3. Shaanxi Key Laboratory of Engineering Behavior and Foundation Treatment for Special Sou, Xi'an 710043, Shaanxi, China

摘要: 介绍了一种通过钻孔剪切试验测定土体抗剪强度参数的原位测试新方法,从试验原理、试验设备和试验数据处理分析方法等方面对钻孔剪切试验进行了总结。为验证钻孔剪切试验的工程适用性,采用美国Iowa钻孔剪切试验仪分别对非饱和黄土及饱和黄土的抗剪强度指标进行了实测。试验结果表明,钻孔剪切试验可快速、直接地得到黄土的抗剪强度参数,试验数据的线性相关性较高。针对现有钻孔剪切试验中存在的问题,建议了今后的研究方向。
- 钻孔剪切试验 /
- 原位测试 /
- 黄土 /
- 抗剪强度指标
Abstract: The Borehole Shear Test(BST) was introduced as a new in-situ method for determining shear strength parameters of soils.The borehole shear tests are summarized,including the shearing mechanism,test equipment and test data processing method etc.To evaluate the engineering applicability of the test,the Iowa borehole shear tester are adopted to determine shear strength parameters of unsaturated loess and saturated loess in geotechnical investigation.The test results show that,the BST is a rapid and direct method of measuring the in,situ shear strength of loess,and gains a good linear relativity between normal stress and shear stress.Then in view of existence question in BST,the recommendations for future research are also proposed.
- Borehole Shear Test /
- in-situ test /
- loess /
- shear strength parameter