双排桩与扶壁式挡墙组合结构在高填方边坡加固中的应用分析  

Application Analysis of the Composite Structure of Double Row Piles and Counterfort Retaining Walls in the Reinforcement of High Fill Slopes

作　　者：柴卓 张海锋 谢春燕 CHAI Zhuo;ZHANG Haifeng;XIE Chunyan(Shaanxi Branch of China National Geological Exploration Center of Building Materials Industry)

机构地区：[1]中国建筑材料工业地质勘查中心陕西总队

出　　处：《广东建材》2024年第5期87-90,共4页Guangdong Building Materials

摘　　要：陕北某住宅小区位于填沟造地形成的填方地基上,采用桩基础穿透填土层支撑于下部中风化砂岩层以满足竖向承载力要求,而小区外侧高填土边坡(高度20m)未进行防护,现状稳定性较差,不能满足规范要求。根据现状边坡勘察结果,分析高填方边坡变形失稳机理及现场施工条件等因素,采用刚度较大的双排桩与扶壁式挡墙组合结构加固高填方边坡,并对桩周进行双液法压密注浆加固,取得良好加固效果。本文就双排桩与扶壁式挡墙组合结构加固机理、设计要点及加固效果检验进行论述,希望对类似的高填方边坡加固工程提供参考。A residential community in northern Shaanxi is located on a fill foundation formed by filling ditches and land.A pile foundation is used to penetrate the fill layer and support it on the lower moderately weathered sand and mudstone layer to meet the vertical bearing capacity requirements.However,the high fill slope(20m high)outside the community is not protected,and the current stability is poor,which cannot meet the requirements of the specifications.Based on the current survey results of the slope,the deformation and instability mechanism of the high fill slope and the on-site construction conditions were analyzed.A combination structure of double row piles and buttressed retaining walls with high stiffness was used to reinforce the high fill slope,and the double liquid method compaction grouting reinforcement was applied to the pile periphery,achieving good reinforcement effect.This article discusses the reinforcement mechanism,design points,and reinforcement effect inspection of the combination structure of double row piles and buttressed retaining walls,hoping to provide reference for similar high fill slope reinforcement projects.

关 键 词：双排桩 扶壁式挡墙 压密注浆 填方边坡 

分 类 号：TU753.8[建筑科学—建筑技术科学]