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青島地(di)鐵(tie)4號線李家下莊站大里(li)程端(duan)暗挖始(shi)發洞(dong)20m管(guan)(guan)棚(peng)施工(gong)于5月(yue)20日(ri)正式開工(gong)，于6月(yue)22日(ri)完成(cheng)左右兩洞(dong)管(guan)(guan)棚(peng)施工(gong)。

據悉，李(li)嶗區間設置(zhi)(zhi)φ76壁厚8mm管(guan)(guan)棚超前預加固(gu)，長(chang)度為20m。鋼(gang)(gang)(gang)管(guan)(guan)采用(yong)(yong)直徑(jing)76mm璧(bi)厚8mm的(de)熱軋無縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)，環向間距(ju)0.4m，外插角5-10°，管(guan)(guan)棚采用(yong)(yong)分(fen)節安裝，相鄰(lin)兩鋼(gang)(gang)(gang)管(guan)(guan)的(de)接(jie)頭要(yao)錯(cuo)接(jie)，錯(cuo)接(jie)長(chang)度不(bu)小(xiao)于1m，鋼(gang)(gang)(gang)管(guan)(guan)上注(zhu)漿(jiang)(jiang)孔，孔徑(jing)10mm，孔間距(ju)150mm，梅(mei)花(hua)形布置(zhi)(zhi)，鋼(gang)(gang)(gang)管(guan)(guan)尾部(bu)2米作為止(zhi)漿(jiang)(jiang)段，不(bu)設置(zhi)(zhi)注(zhu)漿(jiang)(jiang)孔，注(zhu)漿(jiang)(jiang)結束后，用(yong)(yong)m10水泥砂漿(jiang)(jiang)充滿鋼(gang)(gang)(gang)管(guan)(guan)。

為(wei)保證施(shi)工(gong)(gong)進(jin)(jin)度，項(xiang)目部(bu)(bu)制定了合理有效(xiao)的施(shi)工(gong)(gong)節(jie)點工(gong)(gong)期目標，工(gong)(gong)程(cheng)技術部(bu)(bu)提前對施(shi)工(gong)(gong)班組以及相關人員(yuan)進(jin)(jin)行技術交底，使施(shi)工(gong)(gong)人員(yuan)對管棚(peng)(peng)施(shi)工(gong)(gong)的工(gong)(gong)序工(gong)(gong)法(fa)做到應知(zhi)應會；以確保管棚(peng)(peng)施(shi)工(gong)(gong)的質量達標。

管棚施工的(de)完成為下步TBM掘進、暗挖施工創造安全(quan)、穩定的(de)施工條件。

李嶗區間管棚施工