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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
【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。
【Abstract】 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.
【Key words】 soil-rock interface strata; interface; mechanical behavior; cohesion strength; friction strength;
- 【文献出处】 人民长江 ,Yangtze River , 编辑部邮箱 ,2010年17期
- 【分类号】TU43
- 【被引频次】2
- 【下载频次】178