中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2019, Vol. 38 ›› Issue (11): 90-97.DOI: 10.3969/j.issn.1674-0696.2019.11.15

• 港口航道·水利水电·资源环境 • 上一篇    下一篇

新型便携式钻孔剪切仪研发与测试分析

张建经1 ,马东华1,曾鹏毅1,孙延军2,何梦2   

  1. (1. 西南交通大学 土木工程学院,四川 成都 610031; 2. 郑州中核岩土工程有限公司,河南 郑州 450008)
  • 收稿日期:2018-10-30 修回日期:2019-01-07 出版日期:2019-11-21 发布日期:2019-11-21
  • 作者简介:张建经(1960—),男,四川成都人,博士,教授,博士生导师,主要从事岩土工程抗震方面的研究。E-mail:jianzhang1102@126.com。
  • 基金资助:
    国家重点研发计划(2017YFC0504901)

Development and Test Analysis of a New Portable Borehole Shear Equipment

ZHANG Jianjing1 , MA Donghua1 , ZENG Pengyi1, SUN Yanjun2, HE Meng2   

  1. (1. College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, P. R. China; 2. China Nuclear Geotechnical Engineering Co., Ltd., Zhengzhou 450008, He’nan, P. R. China)
  • Received:2018-10-30 Revised:2019-01-07 Online:2019-11-21 Published:2019-11-21

摘要: 在分析了国外现有设备优缺点的基础上,研发了一套新型便携式钻孔剪切仪,并在室内模型箱和野外现场进行了大量试验。通过比较钻孔剪切试验与室内直剪、三轴试验的结果,发现钻孔剪切试验所得数据拟合的相关系数均大于0.98,其离散性比室内直剪试验小;所得黏聚力和内摩擦角分别比室内直剪试验小30%~50%和10%~25%,比室内三轴试验小9%和2%。针对上述结果,在分析3种试验的边界条件、试样破坏判别准则的基础上,给出了试验结果差异性的解释,提出了该仪器的适用范围与注意事项。

关键词: 岩土工程 , 钻孔剪切试验, 原位测试, 抗剪强度指标, 室内试验

Abstract: There is a strong demand for portable in-situ test equipment in Chinas survey field. For this reason, Based on the analysis of the advantages and disadvantages of existing equipment abroad, a new type of portable drilling shearing instrument was developed, and a large number of experiments in the indoor model box and field were carried out. By comparing the results of borhole shear test with those of direct shear test and tri-axial test, it is found that all the correlation coefficients of data fitting obtained from borehole shear test are greater than 0.98, and their discreteness is smaller than that of direct shear test; the obtained cohesion and internal friction angle are 30%-50% and 10%-25% less than those of the indoor direct shear test respectively, and 9% and 2% less than those of the tri-axial test. For the above results, based on the analysis of the boundary conditions and sample failure criteria of the three tests, the explanation of the difference of the test results was given, and the applicable scope and precautions of the proposed instrument were proposed.

Key words: geotechnical engineering, borehole shear test, in-situ test, shear strength parameter, indoor test

中图分类号: