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青島地鐵(tie)4號線(xian)李家下(xia)莊(zhuang)站(zhan)大里程端暗(an)挖始發洞(dong)20m管棚(peng)施(shi)工(gong)(gong)于5月20日正式(shi)開(kai)工(gong)(gong)，于6月22日完成(cheng)左右兩(liang)洞(dong)管棚(peng)施(shi)工(gong)(gong)。

據悉，李嶗區間(jian)設(she)置φ76壁厚8mm管(guan)棚超(chao)前預加固，長(chang)度為20m。鋼(gang)(gang)(gang)(gang)管(guan)采用直徑76mm璧厚8mm的熱軋無縫鋼(gang)(gang)(gang)(gang)管(guan)，環向間(jian)距0.4m，外(wai)插(cha)角5-10°，管(guan)棚采用分(fen)節(jie)安(an)裝，相鄰兩鋼(gang)(gang)(gang)(gang)管(guan)的接頭要錯接，錯接長(chang)度不小(xiao)于(yu)1m，鋼(gang)(gang)(gang)(gang)管(guan)上(shang)注漿(jiang)孔，孔徑10mm，孔間(jian)距150mm，梅花形布置，鋼(gang)(gang)(gang)(gang)管(guan)尾部2米作為止漿(jiang)段(duan)，不設(she)置注漿(jiang)孔，注漿(jiang)結(jie)束后，用m10水泥砂(sha)漿(jiang)充滿鋼(gang)(gang)(gang)(gang)管(guan)。

為保證施(shi)工(gong)(gong)進度，項目部(bu)制定了合(he)理有效的施(shi)工(gong)(gong)節點工(gong)(gong)期目標，工(gong)(gong)程(cheng)技(ji)術部(bu)提前對施(shi)工(gong)(gong)班組以(yi)及(ji)相關人員進行技(ji)術交底，使施(shi)工(gong)(gong)人員對管(guan)(guan)棚施(shi)工(gong)(gong)的工(gong)(gong)序工(gong)(gong)法做(zuo)到(dao)應知應會；以(yi)確保管(guan)(guan)棚施(shi)工(gong)(gong)的質量達標。

管棚施(shi)工(gong)的完(wan)成為(wei)下(xia)步TBM掘進(jin)、暗挖施(shi)工(gong)創造安全、穩定(ding)的施(shi)工(gong)條件。

李(li)嶗區間管棚施工