既有地下室旁非对称荷载基坑单侧支护的应对措施  

Countermeasures for Unilateral Support of Asymmetric Load Excavation Near Existing Basement

作　　者：旷翀 KUANG Chong(Shanghai Urban Construction Design Research Institute(Group)Co.Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《工程建设与设计》2022年第17期50-53,共4页Construction & Design for Engineering

摘　　要：深圳市某综合体四周的道路设计为地下环路,道路上方地面设计为滨海休闲绿地,实现地下行车、地面行人的人车分流。为节省造价,地下环路基坑与综合体地下室共用围护桩。但由于综合体地下室与地下环路的建设时序不一致,且为充分利用规划红线内面积,综合体地下室的地下1层外墙不浇筑,使地下1层范围内围护桩与地下室之间的空隙不能回填土方,导致地下环路基坑承受非对称荷载,形成单侧支护的基坑。论文详述了该工程实施过程中的困难,通过多方案比选和论证,针对上述工程难点,创新性地提出了非对称荷载基坑单侧支护的应对措施。The roads around a shopping mall in Shenzhen are designed as underground loop,the ground above the road is designed as coastal leisure green space,to realize the separation of people and vehicles between underground and ground.In order to save cost,the excavation of underground loop and shopping mall basement share the support pile.But the construction sequence of shopping mall basement and underground loop is inconsistent,in order to make full use of the area within the planned red line,the wall of the basement B1 is not construct,so the gap between support pile and basement B1 can not be backfilled,it causes the excavation of underground loop to bear asymmetric load,and forms a excavation with unilateral support.The difficulties in the construction of the project are described in detail in this paper.Through comparison and demonstration of multiple schemes,for the above engineering difficulties,innovative measures for unilateral support of asymmetric load excavation are put forward.

关 键 词：地下环路 基坑 非对称荷载 地连墙 咬合桩 加肋板 

分 类 号：TU753[建筑科学—建筑技术科学]