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永安里地铁车站是北京地铁“复一八”线的一座车站,位于建外大街与东大桥路丁字路口处,车站主体结构净宽20.3m,高15.3m,全长235.4m,为三跨三层整体现浇钢筋混凝土框架结构,采用复合式衬砌,即首先在开挖的洞壁上喷射混凝土,作为初期支护,然后再铺设一层以塑料板(膜)为主体材料的防水层,最后以模注混凝土作为二次衬砌。西德、瑞士、奥地利、意大利、美国 法国、日本、韩国等国家修建的山岭公路隧道、铁路隧道以及部分地铁隧道、车
Yong’nei Metro Station is a station on the “8th” line of Beijing Subway. Located at the intersection of Jianshe Avenue and Dongdaqiao Road, the main structure of the station is 20.3m in width and 15.3m in height with a total length of 235.4m, The overall cast-in-place reinforced concrete frame structure, the use of composite lining, that is, first in the excavation of the tunnel wall sprayed concrete, as the initial support, and then laying a layer of plastic (film) as the main material of the waterproof layer, and finally To mold the concrete as a secondary lining. West Germany, Switzerland, Austria, Italy, the United States, France, Japan, South Korea and other countries to build mountain road tunnels, railway tunnels and some subway tunnels, cars