某地新近沉积砂卵石地层现场直接剪切试验成果分析及探讨
Analysis and Discussion about the Field Direct Shear Test Results of the Recently Deposited Sand and Cobble Stratum

作者: 刘 伍 :北京市地质工程设计研究院,北京;

关键词: 砂卵石地层现场直剪试验特殊结构似黏聚力Sand and Cobble Stratum Field Direct Shear Test Special Structure Pseudo Cohesion

摘要:
通过在砂卵石地层中进行的现场直剪试验,来验证这种地层并非像一般的“无黏性土”地层那样,黏聚力为零,而是具有显著的黏聚力数值。另外,通过对砂卵石地层的结构进行深入分析,认为其具有的“叠瓦状结构”是产生“似黏聚力”的主要原因,从而达到了试验验证与理论分析的高度吻合。本研究成果不仅具有理论意义,更具有在岩土工程设计及降低工程造价方面的实际意义,值得进一步深入、系统研究。

Abstract: This paper verified that the sand and cobble stratum was of significant cohesion strength according to the results of field direct shear test. On analysis of the sand and cobble stratum structure, we consider that the imbricate structure of the stratum is the main cause of the pseudo cohesion, which makes the experimental verification highly anastomosed with the theoretical analysis. This research result not only has great theoretical significance, but also has practical significance in reducing project cost and geotechnical engineering design. This subject is worth making thorough survey and study.

文章引用: 刘 伍 (2014) 某地新近沉积砂卵石地层现场直接剪切试验成果分析及探讨。 土木工程, 3, 128-139. doi: 10.12677/HJCE.2014.34016

参考文献

[1] 张玲玲, 姚勇 (2008) 川西北地区砂卵石土抗剪强度影响因素分析. 硅谷, 18, 4-5.

[2] 赵兵, 黄荣 (2011) 成都地区砂卵石的抗剪强度探讨. 价值工程, 18, 60-61.

[3] 陈希哲 (1994) 粗粒土的强度与咬合力的试验研究. 工程力学, 4, 56-63.

[4] 刘伍 (2003) 在砂卵石地层中的基坑支护结构设计及施工工艺探讨. 土木工程(Hans汉斯), 1, 84-88

[5] GB50021-2001 (2012) 岩土工程勘察规范(2009版). 中国建筑工业出版社, 北京.

[6] GB/T50123-1999 (1999) 土工试验方法标准. 中国建筑工业出版社, 北京.

[7] 冯明, 张先, 吴继伟 (2007) 构造地质学. 地质出版社, 北京.

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