考虑滑体粗粒土蠕变性质的边坡长期稳定性研究  

Study on Long-term Stability of Slope Considering Creep Properties of Coarse-grained Soil

作　　者：黄凯湘[1] HUANG Kaixiang(Guangzhou Urban Planning Survey and Design Institute Guangzhou 510060,China)

机构地区：[1]广州市城市规划勘测设计研究院,广州510060

出　　处：《广东土木与建筑》2021年第7期68-71,共4页Guangdong Architecture Civil Engineering

摘　　要：针对滑体粗粒土开展了三轴蠕变试验,采用Singh-Mitchell蠕变模型能较好地拟合试验结果。分别采用长期强度下摩尔库伦模型、Drucker-Prager与Singh-Mitchell弹塑蠕变耦合模型,通过有限元软件计算和研究二维理想边坡的长期稳定性。结果表明,滑体土蠕变对边坡的长期稳定性有重要影响;采用长期强度下摩尔库伦模型比弹塑蠕变耦合模型,边坡变形更大,计算结果偏保守。A triaxial creep test was carried out for the coarse-grained soil of the slippery body.The Singh-Mitchell creep model can fit the test results well.The Moore Coulomb model under long-term strength,the Drucker-Prager and Singh-Mitchell elastic-plastic creep cou‐pling models were used to calculate and study the long-term stability of a two-dimensional ideal slope through finite element software.The re‐sults show that the creep of landslide soil has an important effect on the long-term stability of the slope;the Moore Coulomb model under long-term strength has greater slope deformation than the elastic-plastic creep coupled model,and the calculation results are conservative.

关 键 词：粗粒土 三轴蠕变试验 长期强度 Singh-Mitchell蠕变模型 边坡长期稳定性 

分 类 号：TU433[建筑科学—岩土工程]