摘要
为研究含淤泥质土层边坡支护中的边坡稳定性问题,取原状淤泥质土样品进行室内试验,分析72 h内土样在天然环境中含水率、液性指数、黏聚力及内摩擦角的数值变化,随着时间的增长,含水率、液性指数均呈降低趋势,黏聚力及内摩擦角均呈增大趋势。通过数值模拟试验,得出淤泥质土层边坡位移及应力云图,淤泥质土层底部受剪力影响大。边坡支护设计时,杉木杆宜沿竖向垂直插入,能有效提高边坡抗剪能力;边坡开挖时,应进行晾晒处理,增强边坡稳定性。对推荐的支护形式进行基坑监测数据验证,竖向位移及水平位移量均满足规范要求。
In order to study the slope stability problem in the slope support of muddy soil layer,laboratory tests were conducted on undisturbed muddy soil samples,and the numerical changes of water content,liquid index,cohesion and Angle of internal friction of soil samples in the natural environment within 72 hours were analyzed.With the increase of time,water content and liquid index showed a decreasing trend,while cohesion and Angle of internal friction showed an increasing trend.Through numerical simulation test,the slope displacement and stress cloud map of the muddy soil layer are obtained,and the bottom of the muddy soil layer is greatly affected by the shear force.In the design of slope support,the Chinese fir bar should be inserted vertically along the vertical,which can effectively improve the shear resistance of the slope.When the slope is excavated,it should be dried to enhance the stability of the slope.The recommended support form is verified by monitoring data of foundation pit.Both vertical displacement and horizontal displacement meet the standard requirements.
作者
潘增志
杨波
徐天宇
王晔
赵民
PAN Zengzhi;YANG Bo;XU Tianyu;WANG Ye;ZHAO Min(Qingdao Surveying&Mapping Institute,Qingdao 266033,China;Qingdao Innovation Center of Smart(Green)Geotechnical Technology,Qingdao 266033,China)
出处
《四川建材》
2025年第8期121-123,共3页
Sichuan Building Materials
关键词
淤泥质土
室内试验
杉木杆
数值模拟
基坑监测
muddy soil
laboratory test
Chinese fir pole
numerical simulation
foundation pit monitoring
