基于大型直剪试验的碎石土含水率影响研究

STUDY ON MOISTURE CONTENT OF GRAVEL SOIL BASED ON LARGE-SCALE DIRECT SHEAR TEST

以田师傅-桓仁铁路大前石岭隧道进口边坡碎石土为研究对象,通过室内大型直剪试验对三组不同含水率的重塑土样分别进行剪切试验,讨论分析了含水率对碎石土工程力学特性的影响规律。同时,通过与室内常规直剪试验结果的对比分析,验证了室内大型直剪试验的结果更加符合现场的实际工程地质特性。

The research object was the gravel soil in the slope of Daqianshiling Tunnel in theTianshifu-Huanren railway. The influence of moisture content on the engineering mechanical perfor-mance of gravel soil was investigated through large-scale direct shear test on three groups of remoldedgravel soil specimens of different moisture contents.The tests results show that the physical and me-chanical property of gravel soil is different from common rock and soil mass.In the meanwhile, com-pared with the results of regular direct shear test, it shows that the results of large-scale direct sheartest are more coincident with the local actual engineering geologic performance.