嵊州红层软岩强度试验研究

Experimental Study on the Strength of Red Bed Soft Rock in Shengzhou

红层边坡的开挖常诱发边坡的崩塌灾害,稳定性问题十分突出。文中针对嵊州红层软岩进行了X射线粉晶衍射测定矿物成分,进行了不同围压下的三轴应力-应变试验,对试验结果进行分析,研究了不同围压下红层软岩的破坏规律、峰值强度、残余强度的规律;通过最小二乘法绘制了峰值强度和围压的最佳关系曲线,得到红层强度的准确表达式。

The excavation of red bed slope often induce slope collapse,and the stability problem is very prominent.Therefore,the mineral composition of the red bed soft rock in Shengzhou was determined by X-ray powder diffraction,the triaxial stress-strain tests under different confining pressures were carried out,the test results were analyzed,and the failure law,peak strength and residual strength of the red bed soft rock under different confining pressures were studied;The best relation curve between peak strength and confining pressure is drawn by the least square method,and the accurate expression of red bed strength is finally obtained.