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南水北调北京段下穿五棵松地铁车站工程,在下穿地铁车站施工前采用Φ108×8 mm超前注浆管对暗涵施工影响范围土体进行注浆加固,而Φ108超前注浆管在卵石地层进行长距离(≮15m)施工缺少相应的施工工艺和参数借鉴,同时对下穿地铁车站段的土体进行超前注浆支护是控制地铁沉降的关键措施之一,所以在正式下穿车站施工前,需预先进行深孔注浆试验,为成功穿越五棵松地铁车站提供重要依据。
Under the Beijing section of South-to-North Water Diversion, the Wukesong metro station project is underway and Φ108 × 8 mm ahead grouting pipe is used to grout and reinforce the soil mass affected by the culvert construction ahead of the subway station construction. The Φ108 advance grouting pipe is conducted in the pebble stratum The construction of long distance (≮15m) lacks the corresponding construction technology and parameters for reference, and the advanced grouting support for the soil below the subway station section is one of the key measures to control the subsidence of the subway. Therefore, before formally undergoing the construction of the station , Need to advance the deep hole grouting test, to provide an important basis for the successful crossing of Wukesong subway station.