丘陵地区抗滑桩加固边坡的影响因素研究  

Study on the Influencing Factors of Slope Reinforcement with Anti-slip Piles in Hilly Areas

作　　者：游昌达 臧骏 闫鑫雨[1] YOU Changda;ZANG Jun;YAN Xinyu(CCCC Second Harbor Engineering Company Ltd.,Guangzhou 511400,China;China Communications(Guangzhou)Construction Co.,Ltd.,Guangzhou 511400,China)

机构地区：[1]中交第二航务工程局有限公司,广州511400 [2]中交(广州)建设有限公司,广州511400

出　　处：《路基工程》2024年第5期209-214,共6页Subgrade Engineering

摘　　要：基于广东黄田服务区边坡支护工程,通过数值模拟计算,分析丘陵地区土体黏聚力、土体内摩擦角、抗滑桩桩长及抗滑桩埋设方法对边坡和支护的影响。结果表明:随着土体黏聚力和土体内摩擦角的增大,桩身位移和桩身应力逐渐减小;抗滑桩全埋式布置方式较半埋式方式合理,桩身位移、桩身剪应力和桩身应力小,受力合理;采用阶梯形截面抗滑桩进行边坡支护时,桩身位移小,对滑动体拦截作用明显;当土体黏聚力大于32 kPa或土体内摩擦角大于37°时,宜减小抗滑桩的刚度。抗滑桩设计宜采用阶梯形截面和全埋式布桩方式,抗滑桩自由段长度与滑体高度的比值为6/7,可节省施工成本,最大限度地发挥抗滑桩的支护作用。Based on slope support project in Huangtian service area of Guangdong Province,this paper analyzes the effects of soil cohesion,internal friction angle of soil,length of anti-slip pile,and embedding method of anti-slip pile on slope support through numerical simulation calculation.The research results indicate that:With the increase of soil cohesion and internal friction angle,the displacement and stress of the pile gradually decrease.The fully buried arrangement of anti-slip piles is more reasonable than the semi-buried method,with lower displacement,shear stress,and stress on the pile body,and reasonable stress distribution.When using cross section stepped piles for slope support,the displacement of the pile body is small and the interception effect on the sliding body is obvious.In this project,it is recommended to reduce the stiffness of the anti-slip pile when the soil cohesion is greater than 32 kPa or the internal friction angle of the soil is greater than 37°.In the design process of anti-slip piles,it is recommended to use anti-slip piles with a stepped cross-section and adopt a fully buried pile layout method.During the layout process,the ratio of the length of the free section of the anti-slip pile to the height of the sliding body should be maintained at 6/7,which can maximize the support effect of the anti-slip pile while saving construction costs.

关 键 词：丘陵地区 抗滑桩 边坡支护 埋设方法 位移检测 施工成本 

分 类 号：P642[天文地球—工程地质学]