多种支护型式在超大面积软土深基坑中的应用  

Application of Multiple Support Types for Super-large Deep Foundation Pits in Soft Soil Area

作　　者：安然 成怡冲 龚迪快 许冠 An Ran;Cheng Yichong;Gong Dikuai;Xu Guan(Zhejiang Huazhan Institute of Engineering Research&Design,Ningbo 315012,Zhejiang,China)

机构地区：[1]浙江华展工程研究设计院有限公司,浙江宁波315012

出　　处：《岩土工程技术》2023年第2期232-237,共6页Geotechnical Engineering Technique

摘　　要：宁波某大面积深基坑工程地质条件复杂,变形控制难度大。根据基坑开挖流程和区段特点,经方案比选与论证,对基坑外围采用桩锚与桩撑相结合的支护体系,对分期开挖交界处采用重力式挡墙+放坡支护。结合基坑监测数据分析研究基坑开挖过程,重点分析不同锚索类型的内力及变形控制效果。本工程实践及研究成果可为类似工程提供参考。The engineering geological conditions of a large area deep foundation pit in Ningbo are complex,and the deformation control is difficult.According to the excavation process and section characteristics of the foundation pit,pile-anchor and pile-braced composite supporting structures were adopted in the foundation pit,and the supporting structure of gravity retaining wall plus slope were used at the junction of different basement development sites.Combined with the monitoring data of the foundation pit,the excavation process of the foundation pit was analyzed,and the internal force and deformation control effect of different anchor cable types were mainly discussed.The practice of this project can provide reference for similar projects.

关 键 词：多种支护型式 深大基坑 SMW工法 锚索 变形 

分 类 号：TU473[建筑科学—结构工程]