填海区复合地层深大基坑施工关键技术  

Key Technologies for Deep and Large Excavation in Composite Strata of Reclamation Area

作　　者：刘宽 Liu Kuan

机构地区：[1]上海隧道工程有限公司

出　　处：《隧道与轨道交通》2024年第2期30-34,73,共6页Tunnel and Rail Transit

摘　　要：填海造陆以及不断开拓地下空间是解决城市发展过程中土地资源愈发紧张、增强城市建设张力的有效措施。针对填海区复合地层深大基坑工程,分析了上部存在厚填石且入岩深度较大的地下连续墙施工、厚填石区桩基施工、深大基坑横穿断裂带处理、基坑坑底入岩开挖等存在的施工困难,并介绍了上述问题的解决思路及方案,实现了填海区复合地层中深大基坑的安全顺利实施,并提高了施工效率及经济效益。Land reclamation and continuous development of underground space are effective measures to address the increasing scarcity of land resources during urban development and to enhance the tension of urban construction.The construction difficulties encountered in deep and large excavation projects in composite strata of reclamation area,such as the construction of diaphragm walls with thick fill above and large depths into the rock,pile foundation construction in thick fill areas,treatment of deep and large excavation crossing fracture zones,and rock excavation at the bottom of the pit are analyzed.The solutions and strategies for the aforementioned issues are introduced,which contribute to the safe and smooth implementation of deep and large excavation in composite strata of reclamation area,and improve the construction efficiency and economic benefits.

关 键 词：填海区 复合地层 深大基坑 地下连续墙 基岩处理 厚填石区 断裂带 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]