北京地铁王府井至东单的区间工程,地处闹市区,洞群复杂,围岩软弱,地下水丰富,断面大。铁道部十六局地下工程指挥部在该区间施工中利用台阶法、中隔壁法等国内领先工法,取得了城市软岩洞群开挖支护、综合防排水等7项浅埋暗挖施工技术新成果。施工中确保了地下管网不断不裂,地表 The section of the Beijing Metro from Wangfujing to Dongdan is located in the downtown area. The complex is complex with weak surrounding rocks, rich groundwater, and large sections. The Underground Engineering Headquarters of the 16th Bureau of the Ministry of Railways used the domestic leading construction method such as the step method and the middle partition method in the construction of the interval, and obtained seven shallow buried excavation techniques such as excavation support and comprehensive waterproof and drainage for the soft rock cavern group in the city. Achievements. During the construction, the underground pipe network is continuously cracked and the ground surface is ensured