北京地铁天安门西站“暗挖逆筑法”施工技术

Construction technology of “tunneling and top-down method” at west Tian’anmen station in metro of Beijing

摘要: 介绍了北京地铁天安门西站工程采用的“暗挖逆筑法”施工技术 ,分析了施工中实测的地表沉降、围岩压力和支护结构内力。“暗挖逆筑法”在暗挖条件下进行逆筑施工 ,有机地结合了“逆筑法”和“浅埋暗挖法” ,具有经济、安全、施工速度快等特点 ,能较好地适用城市繁华地区大型地下工程的施工。

Abstract: The construction method of “tunneling and top-down method” at west Tian′anmen station in metro of Beijing is introduced,and the measured settlement of ground surface,the measured pressure of surrounding rock and the internal force of strut are analyzed.This method,which combines“top-down method” and “shallow tunneling method”,possesses the advantages,such as economization, safety and rapid construction,ect,and it can be applied to large underground engineering in the flourishing area of city.