复杂地质条件下拔桩清障对地下连续墙成槽的影响及处理措施  

Impact of Pulling Out Piles to Clear Obstacles on Trenching of Diaphragm Wall Under Complex Geological Conditions and Treatment Measures

作　　者：张道凯 张忠璞 韩伟 王文瀚 徐斌[1] ZHANG Daokai;ZHANG Zhongpu;HAN Wei;WANG Wenhan;XU Bin(The First Company of China Eighth Engineering Bureau Ltd.,Jinan 250100,Shandong,China)

机构地区：[1]中建八局第一建设有限公司,山东济南250100

出　　处：《建筑施工》2023年第2期273-275,共3页Building Construction

摘　　要：为研究总结拔桩清障施工对后续地下连续墙成槽施工的影响,结合绍兴高铁北站城市更新交通综合体项目的建设案例,针对在深基坑工程施工过程中,其原有地下车库和桩基严重影响该区域地下连续墙和围护桩的现状,采用全回转钻机清障、拔桩结合拉森钢板桩围护,通过桩孔回填控制和TRD工法桩槽壁加固,保障了后续地下连续墙的成槽质量,且对邻近高铁站房的扰动较小。经验证,施工方案切实可行,可为相关工程提供参考。To study and summarize the impact of pile pulling to clear obstacles on the subsequent trench construction of the diaphragm wall,in combination with the construction case of the urban renewal traffic complex project of Shaoxing North High Speed Railway Station,in view of the current situation that the original underground garage and pile foundation seriously affect the diaphragm wall and support pile in this area during the construction of deep foundation pit,the full rotary drilling machine is used to clear the obstacles and pull the piles with using Larsen steel sheet piles for support,through the control of pile hole backfilling and the trench wall reinforcement using TRD construction method piles,the quality of subsequent diaphragm wall trench formation is ensured,and the disturbance to adjacent high-speed railway station buildings is small.After verification,the construction scheme is feasible and can provide reference for relevant projects.

关 键 词：深基坑工程 软土地质 拔桩清障 地下连续墙成槽 

分 类 号：TU753[建筑科学—建筑技术科学]