土岩接触复杂地层中接触面力学性质研究  

Study on mechanical behavior of interface between soil and rock in complex strata

作　　者：张朝晖[1,2] 娄宗科[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]杨凌职业技术学院交通与测绘工程学院,陕西杨凌712100

出　　处：《人民长江》2010年第17期16-18,36,共4页Yangtze River

摘　　要：为了探讨在土、岩地层中隧道工程施工引起的塌方问题,以宝天高速公路隧道工程为例,通过室内常规土的物理力学性质指标测试,土、岩接触面直剪试验,研究了土、岩接触地层中接触面的力学性质,得到不同含水率、不同固结压力下土、岩接触面的抗剪强度参数。研究表明:①土、岩接触面中岩侧具有一定阻渗作用;②随着含水率的增大,土、岩接触面的粘聚强度减小,而摩擦强度变化较小。In order to discuss the collapse problem in tunnels on soil-rock interface,taking Baoji-Tianshui highway tunnel project as an example,we studied the physical mechanical property of soil-rock interface,and obtained the shear strength parameters of soil-rock interface stratum under different water contents and consolidation pressures through conventional laboratory test of soil physical mechanical property indexes and direct shear test of soil-rock interface.The research shows that：① soil-rock interface can prevent seepage to some extent;② with the increase of water content,the cohesion strength of soil-rock interface decreases,and the frictional strength changes a little.

关 键 词：土、岩接触地层 接触面 力学性质 粘聚强度 摩擦强度 

分 类 号：TV135[水利工程—水力学及河流动力学]