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

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.