摘要
以泾河南岸坮塬某滑坡滑带土为研究对象,分别进行了不同初始围压条件下饱和Q 2黄土常规三轴固结不排水剪切试验(CTC试验)和饱和Q 2黄土减围压三轴固结不排水剪切试验(RTC试验),探讨不同应力路径下滑带土抗剪强度参数的差异。试验结果表明:两种试验条件下,饱和Q 2黄土破坏模式均为鼓胀破坏;饱和Q 2黄土的抗剪强度在CTC试验条件下远远高于在RTC试验条件下,CTC试验下试样的有效粘聚力c′比RTC试验下试样的有效粘聚力c′高了90%,而有效内摩擦角φ′高了30%。研究结果可为滑坡治理设计,滑带土抗剪强度参数的选取提供一定的参考。
Using the undisturbed Q 2 loess which intacted one landslide in the south bank of lower Jing River,this article designs Conventional undrained triaxial test(CTC test)and Reduced undrained triaxial test(RTC test)of different initial confining pressure(100 kPa,200 kPa,300 kPa,400 kPa and 500 kPa)to comparative study the difference on shear strength of the saturated Q 2 loess between the radial load and.lateral unloading confining pressure.The results show that the damage form of the saturated Q 2 loess all is the ballooning excessive damage.The shear strength of saturated Q 2 loess in CTC test conditions is much higher than in RTC test conditions,CTC test samples under the effective cohesion than RTC test samples under the effective cohesion is 90%higher,and the effective internal friction angle is 30%higher.The research results can provide some reference for the design of landslide control and the selection of shear strength parameters.
作者
袁湘秦
段钊
赵法锁
王维超
Yuan Xiangqin;Duan Zhao;Zhao Fasuo;Wang Weichao(Shaanxi Institute of Engineering Prospecting,Xi’an 710069,China;Xi’an University of Science and Technology,Xi’an 710069,China;Chang’an University,Xi’an 710069,China)
出处
《山西建筑》
2021年第4期6-8,共3页
Shanxi Architecture
基金
国家自然科学基金(41702298)。
