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卵砾石土抗剪强度指标原位直剪试验研究

汤劲松, 刘松玉, 童立元, 沈才华

汤劲松, 刘松玉, 童立元, 沈才华. 卵砾石土抗剪强度指标原位直剪试验研究[J]. 岩土工程学报, 2015, 37(zk1): 167-171. DOI: 10.11779/CJGE2015S1032
引用本文: 汤劲松, 刘松玉, 童立元, 沈才华. 卵砾石土抗剪强度指标原位直剪试验研究[J]. 岩土工程学报, 2015, 37(zk1): 167-171. DOI: 10.11779/CJGE2015S1032
TANG Jin-song, LIU Song-yu, TONG Li-yuan, SHEN Cai-hua. In-situ direct shear tests on shear strength indices of pebble and gravelly soil[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk1): 167-171. DOI: 10.11779/CJGE2015S1032
Citation: TANG Jin-song, LIU Song-yu, TONG Li-yuan, SHEN Cai-hua. In-situ direct shear tests on shear strength indices of pebble and gravelly soil[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk1): 167-171. DOI: 10.11779/CJGE2015S1032

卵砾石土抗剪强度指标原位直剪试验研究  English Version

基金项目: 河北省自然科学基金项目(E2014210021)
详细信息
    作者简介:

    汤劲松(1970- ),男,博士,教授,主要从事岩土与地下工程方面的教学和科研。

In-situ direct shear tests on shear strength indices of pebble and gravelly soil

  • 摘要: 现场大型原位直剪试验是测定卵砾石土强度指标的一种有效方法。通过对江南低山丘陵区典型卵砾石土4个试样的现场大型原位直剪试验,在获取卵砾石土抗剪强度指标的同时,还在试样剪切破坏后的破坏面上取样进行卵砾石土的颗粒粒径分析。试验结果表明:级配良好的卵砾石土原位直剪试验的剪切应力和剪切位移之间的关系曲线具有明显的峰值强度,并出现较稳定的残余强度;试验场地卵砾石土的黏聚力较低,而内摩擦角较高,卵砾石土的这种强度特性不同于一般的均质土体和碎裂岩体,与组成材料的性质、颗粒大小、粒径组成、粗糙程度、充填物的胶结程度和密实程度等因素有关。
    Abstract: As an effective method to determine strength indices of pebble and gravelly soil, the field large-scale direct shear test on four typical samples of pebble and gravelly soil in the area of low mountains and hills Southern to the Yangtze River is conducted. At the same time, the particle size analysis test on pebble and gravelly soil is done in laboratory by sampling in the failure surface after shear failure. The test results show that there are obvious peak strength and steady residual strength at the relation curve between shear stress and shear displacement by direct shear test on well graded pebble and gravelly soil. The cohesive strength is lower and the internal friction angle is higher for pebble and gravelly soil in test site. The strength characteristics of pebble and gravelly soil are different from those of common homogeneous soil and cataclastic rock mass, which are related to many factors such as property of component materials, particle size, size grading, coarseness degree, cementation of cement and dense degree.
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出版历程
  • 收稿日期:  2015-03-25
  • 发布日期:  2015-07-24

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