新型水玻璃-酯类浆液对风积沙边坡稳定性研究  

Study on the Stability of Aeolian Sand Slope with New Sodium Silicate-ester Slurry

作　　者：刘冰 万浩 袁敬强[2] 荣驰 LIU Bing;WAN Hao;YUAN Jing-qiang;RONG Chi(Poly Changda Engineering Co.Ltd.,Guangzhou 510620,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]保利长大工程有限公司,广州市510620 [2]中国科学院武汉岩土力学研究所岩石力学与工程国家重点实验室,武汉市430071

出　　处：《公路》2021年第8期68-73,共6页Highway

基　　金：湖北省创新群体研究项目,项目编号2018CFA012;国家自然科学基金面上基金项目,项目编号51879258。

摘　　要：针对风积沙边坡稳定性差的问题,在新型水玻璃-酯类浆液性质研究的基础上,采用新型水玻璃-酯类浆液对风积沙边坡进行加固,并通过数值模拟的方法研究新型水玻璃-酯类浆液填充率和加固深度对桥台开挖工况下风积沙边坡稳定性的影响。研究结果表明,天然状态下风积沙边坡安全系数为1.15,滑动面近似平行于坡面。在未对风积沙边坡进行加固时,桥台开挖后风积沙边坡最大水平位移为30.6cm,塑性区通过桥台开挖形成的转角处,安全系数为1.03、低于天然状态下的1.15,说明在未加固的条件下对风积沙边坡进行桥台开挖会极大降低风积沙边坡稳定性。新型水玻璃-酯类浆液填充率和加固深度对桥台开挖状态下风积沙边坡稳定性影响结果表明,随着浆液填充率和加固深度的增加,风积沙边坡安全系数不断增加。In view of the poor stability of aeolian sand slope,based on the study of the properties of the new sodium silicate-ester slurry,the new sodium silicate-ester slurry is used to reinforce the aeolian sand slope.The influence of the grouting filling rate and reinforcement depth of the new sodium silicate-ester slurry on the stability of the aeolian sand slope under abutment excavation is studied by numerical simulation.The results show that the safety factor of aeolian sand slope is 1.15under natural state and the sliding surface is approximately parallel to the slope surface.When the aeolian sand slope is not strengthened,the maximum horizontal displacement of aeolian sand slope under abutment excavation is 30.6cm,and the plastic zone passes through the corner formed by abutment excavation,the safety factor is 1.03,which is lower than 1.15in natural state,which shows that the stability of aeolian sand slope will be greatly reduced under abutment excavation without reinforcement.The results of influence of grouting filling ratio and reinforcement depth of the new sodium silicate-ester slurry on stability of aeolian sand slope under abutment excavation indicate that the safety factor of aeolian sand slope increases with the increase of grouting filling rate and reinforcement depth.

关 键 词：边坡加固 风积沙边坡 新型水玻璃-酯类浆液 边坡稳定性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]