文章(zhang)來(lai)源：中國葛洲壩集團(tuan)公司 發布時間(jian)：2012-09-14
由葛洲壩集團二公司承建的珠海市橫琴新區市政基礎設施項目——環島西路南段SD-1號隧道中導洞近日全線貫通。
珠海橫琴新區(qu)市(shi)政基礎(chu)設施(shi)BT項(xiang)目(mu)隧道(dao)工(gong)(gong)(gong)(gong)程是橫琴市(shi)政BT項(xiang)目(mu)的(de)工(gong)(gong)(gong)(gong)期控(kong)制(zhi)性(xing)項(xiang)目(mu)。該隧道(dao)埋深(shen)淺(qian)、跨(kua)度大、地質條件(jian)復雜，受(shou)雨季地表水影響大，設計采用(yong)雙跨(kua)連拱(gong)隧道(dao)。自3月開(kai)(kai)工(gong)(gong)(gong)(gong)以來，葛洲(zhou)壩項(xiang)目(mu)部采用(yong)先開(kai)(kai)挖(wa)中(zhong)導(dao)(dao)洞(dong)，待(dai)中(zhong)導(dao)(dao)洞(dong)貫(guan)通(tong)后再(zai)進(jin)行(xing)中(zhong)隔墻(qiang)混凝(ning)土(tu)施(shi)工(gong)(gong)(gong)(gong)，然后進(jin)行(xing)左右洞(dong)開(kai)(kai)挖(wa)支護(hu)的(de)施(shi)工(gong)(gong)(gong)(gong)方法，對中(zhong)導(dao)(dao)洞(dong)施(shi)工(gong)(gong)(gong)(gong)采用(yong)全斷面(mian)掘(jue)進(jin)、支護(hu)的(de)施(shi)工(gong)(gong)(gong)(gong)，每一循環進(jin)尺(chi)(chi)控(kong)制(zhi)在1.5-2米左右，嚴格遵守“短進(jin)尺(chi)(chi)、弱爆破、強支護(hu)、早閉合”的(de)原則(ze)，嚴格監控(kong)量測(ce)。施(shi)工(gong)(gong)(gong)(gong)五個多月來，質量安全環保指(zhi)標受(shou)控(kong)，受(shou)到了(le)業主及監理的(de)好評(ping)，并提前22天實現中(zhong)導(dao)(dao)洞(dong)貫(guan)通(tong)的(de)階(jie)段性(xing)目(mu)標。