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青島(dao)地(di)鐵(tie)2號(hao)(hao)線(xian)(xian)(xian)(xian)泰山路(lu)站后(hou)折(zhe)返線(xian)(xian)(xian)(xian)繼(ji)右線(xian)(xian)(xian)(xian)貫通(tong)后(hou)，2017年(nian)1月(yue)8日左線(xian)(xian)(xian)(xian)線(xian)(xian)(xian)(xian)順利貫通(tong)，至(zhi)此(ci)青島(dao)地(di)鐵(tie)2號(hao)(hao)線(xian)(xian)(xian)(xian)運(yun)行及折(zhe)返區間全(quan)線(xian)(xian)(xian)(xian)洞通(tong)。泰山路(lu)站后(hou)折(zhe)返線(xian)(xian)(xian)(xian)路(lu)位于市北老城(cheng)區下方，城(cheng)區建(jian)(jian)筑年(nian)代較久、建(jian)(jian)筑密度(du)較大(da)，并下穿(chuan)多(duo)條道路(lu)、人防洞室(shi)群(qun)及重(zhong)(zhong)要管線(xian)(xian)(xian)(xian)，兼(jian)有(you)施工(gong)(gong)場地(di)狹小、施工(gong)(gong)工(gong)(gong)法變換頻繁等(deng)，為重(zhong)(zhong)大(da)風險(xian)工(gong)(gong)點，該(gai)段施工(gong)(gong)風險(xian)大(da)，信訪安全(quan)壓(ya)力(li)大(da)，管控難度(du)高，此(ci)次雙線(xian)(xian)(xian)(xian)貫通(tong)對今后(hou)老城(cheng)區地(di)鐵(tie)施工(gong)(gong)具有(you)重(zhong)(zhong)要借鑒意義(yi)。

泰(tai)山路站(zhan)站(zhan)后折返線(xian)，區(qu)間(jian)全長277米，采用鉆爆(bao)法(fa)施工(gong)(gong)，區(qu)間(jian)地質變(bian)化(hua)較大，中(zhong)(zhong)間(jian)穿越(yue)5條斷層破碎帶，區(qu)間(jian)上方既存多種重(zhong)要(yao)管(guan)線(xian)及(ji)人防(fang)洞室，線(xian)路上方有(you)泰(tai)山路、長山路、鐵(tie)山路、青(qing)城路等(deng)多條道路，人流、車(che)流繁(fan)忙(mang)；洞身正穿15棟(dong)建(jian)筑物，均為80年(nian)代前(qian)老房子，其中(zhong)(zhong)有(you)1棟(dong)危(wei)房，4棟(dong)局(ju)部危(wei)房；該(gai)段施工(gong)(gong)場地狹(xia)小，施工(gong)(gong)工(gong)(gong)法(fa)變(bian)換頻繁(fan)，臺階法(fa)、三臺階法(fa)、CD法(fa)及(ji)雙側壁導坑法(fa)，交互使(shi)用，為重(zhong)大風(feng)險(xian)工(gong)(gong)點。為確保施工(gong)(gong)安(an)全，建(jian)設分公司多次組織專(zhuan)家評(ping)審(shen)，進(jin)(jin)行(xing)專(zhuan)項設計；管(guan)理上嚴格落(luo)實“暗挖三要(yao)素”，認真依(yi)照“一控六專(zhuan)項”進(jin)(jin)行(xing)管(guan)控；承建(jian)該(gai)項目的(de)中(zhong)(zhong)鐵(tie)四局(ju)，精心編(bian)制爆(bao)破方案，積極使(shi)用中(zhong)(zhong)孔(kong)直(zhi)眼掏槽(cao)爆(bao)破技術，增(zeng)設減震(zhen)孔(kong)、優(you)化(hua)各項爆(bao)破參(can)(can)數(shu)，保證了(le)爆(bao)破振速控制在(zai)設計要(yao)求內，并(bing)在(zai)豎井處設置隔音棚，減少揚(yang)塵、噪聲擾民；在(zai)參(can)(can)建(jian)各方的(de)共(gong)同(tong)努力下，泰(tai)山路站(zhan)站(zhan)后折返線(xian)重(zhong)大風(feng)險(xian)點順利貫通。

青島地鐵2號線(xian)泰(tai)山路站(zhan)(zhan)站(zhan)(zhan)后折返線(xian)的順利貫通，積累(lei)了(le)寶(bao)貴的管理、技術、施工經(jing)驗，為(wei)日(ri)后老城區(qu)地鐵施工提供重要參考。