摘要
选取黄土坡临江Ⅱ号崩滑堆积体上TP4平硐内的滑带土进行了室内三轴蠕变试验,选择Burgers蠕变方程对参数进行辩识,并利用FLAC 3D对室内三轴蠕变试验进行了数值模拟,在此基础上对滑带土的蠕变特性及其长期强度进行了研究。结果表明:滑带土的流变性较强;数值模拟试验结果与室内三轴蠕变试验结果具有很好的相似性;利用数值模拟试验结果可以获取滑带土分别加载下的等时曲线,最后可得到滑带土的长期强度参数(即内聚力c∞为21.2kPa、内摩擦角φ∞为18.56°),这为进一步研究滑坡的长期稳定性奠定了基础。
For the purpose of researching the creep property and long-term strength,this paper carries out creep tests on the slip soil from TP4 footrill on No.Ⅱslump accumulation body along the riverside of the Loess Slope by the triaxial creep test and identifies the parameters by Burger＇s creep equation,and then simulates the creep tests by FLAC3 Dnumerical simulation.The test results validate that the rheological property of the slip soil is strong and the numerical simulation results have good similarity with the results of the indoor triaxial compression tests.The paper obtains the creep isochronal curves of the slip soil under different loads and the parameters of the long-term strength of the silp soil,with C∞being 21.2kPa andφ∞18.56°.The study makes a good foundation for the long-term research of the stability of landslide.
出处
《安全与环境工程》
CAS
北大核心
2014年第4期25-29,共5页
Safety and Environmental Engineering
