土岩组合地层变截面嵌套桩施工技术及应用  

Construction Technology and Application of Variable Cross-Section Nested Pile in Soil-Rock Combination Stratum

作　　者：李善明 赵宁 王铁 代志勇 魏宁 杜琪 LI Shan-ming;ZHAO Ning;WANG Tie;DAI Zhi-yong;WEI Ning;DU Qi(Qingdao Metro Group Co.Ltd.First Construction Branch,Qingdao 266011,China;Qingdao Metro Planning and Design Institute Co.Ltd.,Qingdao 266200,China;Qingdao Haida Jianke Geotechnical Engineering Co.Ltd.,Qingdao 266199,China)

机构地区：[1]青岛地铁集团有限公司第一建设分公司,山东青岛266011 [2]青岛市地铁规划设计院有限公司,山东青岛266200 [3]青岛海大建科岩土工程有限公司,山东青岛266199

出　　处：《工程建设与设计》2024年第12期147-149,共3页Construction & Design for Engineering

摘　　要：在城市地铁建设中,常常会遇到土岩组合基坑,目前,大多数施工方法采用施工吊脚桩。为解决吊脚桩施工时存在多余占地及步骤烦琐等问题,论文提出了一种新形式的变截面套桩,并详细介绍了其施工方式及支护体系,并在实际工程中应用。现场监测数据表明,整体位移量较小,基坑稳定性良好,简化了施工工序,节省了施工成本。In the construction of urban subway,soil-rock combination foundation pit is often encountered.At present,most construction methods use construction hanging piles.In order to solve the problems of excessive land occupation and cumbersome steps during the construction of hanging foot piles,this paper proposes a new form of variable cross-section sleeve pile,and introduces its construction method and supporting system in detail,and is applied in the actual project.The site monitoring data shows that the overall displacement is small,the foundation pit stability is good,and the construction process is simplified and construction cost is saved.

关 键 词：土岩组合地层 变截面桩 施工技术 基坑 

分 类 号：TU753.3[建筑科学—建筑技术科学]