摘要
通过金鸡湖A岛中间风井采用钻孔灌注排桩+止水帷幕围护体系的设计与施工实例,分析、研究软土地层超深基坑在复杂环境条件制约下合理的支护结构设计类型,有针对性地分析粉砂地层中旋喷桩与搅拌桩的适用条件和止水效果,同时通过加强施工技术管理等措施,提高了基坑支护结构及盾构端头井土体加固的安全和可靠性,为盾构顺利过井和施工关键工期提供了有力保障。
＂Bored piles ＋ water-stopping curtain＂ retaining system is applied in the construction of the ventilation shaft on Island A in Jinji Lake.The design of the retaining system applied in the super-deep foundation pit in soft soil under complex environment conditions,as well as the application conditions and water-stopping effect of the jet grouting piles and mixing piles are analyzed.The safety and reliability of the retaining structure of the foundation pit and the reinforcement of the end of the shield launching/arriving shaft are guaranteed.In the end,the shield passes the ventilation shaft successfully.
出处
《隧道建设》
2011年第2期215-219,227,共6页
Tunnel Construction
关键词
软土地层
超深基坑
排桩支护
止水帷幕
旋喷桩
搅拌桩
soft soil
super-deep foundation pit
soldier pile
watervstopping curtain
jet grouting pile
mixing pile
