College of Civil Engineering, Xian University of Architecture and Technology, Xian, Shaanxi 710055, China;China Jikan Geotechnical Institute of Enineering Ivestigation and Design, Co., Led, Xian, Shaanxi 710043, China 在期刊界中查找 在百度中查找 在本站中查找
College of Civil Engineering, Xian University of Architecture and Technology, Xian, Shaanxi 710055, China;Shaanxi Polytechnic Institute, Xianyang, Shaanxi 712000, China 在期刊界中查找 在百度中查找 在本站中查找
[Objective] To study how shear strength change with the variation of water content and dry density in undisturbed and disturbed loess paleosol in order to provide the basis for selecting the parameters in design and construction of slope project, tunneling and underground structure engineering in loess area[Methods] Direct shear tests were conducted on undisturbed and disturbed paleosol with different water contents and dry densities.[Results] Under the same dry density, cohesion of both undisturbed and disturbed paleosol decreased with the increase of water content. While under the same moisture content, the cohesion of undisturbed paleosol was greater than the cohesion of disturbed paleosol. The internal friction angle increased with the increase of the water content.[Conclusion] The shear strength index of loess paleosol increases with the decrease of moisture content. An exponential relationship exists between cohesion and water content, and a quadratic parabola relationship exists between internal friction angle and water content.