50m深基坑支护开挖设计与施工理论研究

EXCAVATION SHORING DESIGN FOR 50 m DEEP FOUNDATION PIT AND STUDY ON CONSTRUCTION THEORY

润扬大桥南汊悬索桥经锚碇基础工程是国际上首次采用嵌岩地下连续墙多道钢筋混凝土支撑矩形锚碇工程 ,基坑开挖深度达50m。设计和施工时选用了矩形锚碇围护结构设计方案 ,以及嵌岩地下连续墙、注浆封水、内支撑与锚碇结构相结合的施工工艺 ,采用信息化施工 ,优化设计方案 ,完成了锚碇施工的一系列新颖可靠、经济合理的整套锚碇基础设计与施工技术 ,使大桥北锚碇深基础工程的施工安全、快速 ,整套技术在我国的交通、国防、市政工程领域有很大的推广应用价值。

Anchored foundation of suspended cable bridge in Nanhan is the one which is constructed,firstly in the world, by adopting multi-course continuous underground reinforced concrete wall embedded into underground rock. As the excavation reached a depth of 50m, rectangle anchor enclosure structure is adopted in the design and construction.In addition,many measures such as mortar injection as water barrier,the combination of interior bracing and anchoring,IT based construction,optimum design are taken to ensure a quality project.The construction team developed a series of reliable,economically reasonable anchoring design and construction technology which is of considerable value for the field of transportation,national defense as well as municipal infrastructure project.