精品国产一区二区三区四区_亚洲国产精品无码久久一区二区_中国熟妇xxxx

東北大馬路站管幕工程竣工

日期：2016-09-11

東北(bei)大(da)(da)馬路站(zhan)(zhan)(zhan)(zhan)為(wei)十號線(xian)與規劃遠期七號線(xian)的換乘車(che)站(zhan)(zhan)(zhan)(zhan)，位(wei)于(yu)北(bei)海街(jie)與東北(bei)大(da)(da)馬路十字路口(kou)西(xi)側機動(dong)車(che)道(dao)及非(fei)機動(dong)車(che)道(dao)下(xia)方，車(che)站(zhan)(zhan)(zhan)(zhan)呈南(nan)北(bei)向(xiang)設置，全(quan)長(chang)225.95米。車(che)站(zhan)(zhan)(zhan)(zhan)采(cai)用(yong)兩端(duan)蓋(gai)挖(wa)(wa)中間(jian)暗(an)(an)(an)挖(wa)(wa)法施工，暗(an)(an)(an)挖(wa)(wa)段(duan)采(cai)用(yong)管(guan)(guan)(guan)幕支護施工方法。暗(an)(an)(an)挖(wa)(wa)段(duan)處于(yu)北(bei)海街(jie)與東北(bei)大(da)(da)馬路交通主干道(dao)下(xia)方，覆土深度(du)(du)為(wei)3.2m。車(che)站(zhan)(zhan)(zhan)(zhan)暗(an)(an)(an)挖(wa)(wa)段(duan)里程(cheng)為(wei)K14+719.175～K14+762.275，全(quan)長(chang)43.1m，以車(che)站(zhan)(zhan)(zhan)(zhan)南(nan)側擴(kuo)大(da)(da)端(duan)為(wei)頂進鋼(gang)(gang)管(guan)(guan)(guan)始(shi)發井、北(bei)側為(wei)接收(shou)井。管(guan)(guan)(guan)幕鋼(gang)(gang)管(guan)(guan)(guan)采(cai)用(yong)φ900(t=16mm)，Q235鋼(gang)(gang)管(guan)(guan)(guan),翼緣(yuan)板厚(hou)度(du)(du)為(wei)20mm，翼緣(yuan)板相互(hu)搭接長(chang)度(du)(du)為(wei)90mm，上(shang)下(xia)搭接間(jian)隙為(wei)5mm。鋼(gang)(gang)管(guan)(guan)(guan)中預留φ45@150螺栓孔，管(guan)(guan)(guan)內及管(guan)(guan)(guan)間(jian)填(tian)充C30混凝土、免振搗。鋼(gang)(gang)管(guan)(guan)(guan)管(guan)(guan)(guan)節采(cai)用(yong)對接焊縫，翼緣(yuan)板與鋼(gang)(gang)管(guan)(guan)(guan)采(cai)用(yong)破口(kou)焊，下(xia)翼緣(yuan)板隨開(kai)挖(wa)(wa)及時焊接。

依據(ju)設計要求，頂管(guan)(guan)(guan)與(yu)主體結(jie)構凈(jing)距為50mm,且相鄰頂管(guan)(guan)(guan)翼緣(yuan)板搭接與(yu)鋼(gang)管(guan)(guan)(guan)螺栓連接必須滿足要求，頂管(guan)(guan)(guan)頂進過程(cheng)中的(de)傾角和方位難以(yi)控(kong)制(zhi)，因此，控(kong)制(zhi)偏差(cha)直接影(ying)響到工(gong)程(cheng)的(de)質量(liang)。施工(gong)時(shi)采(cai)用(yong)高精(jing)度(du)探棒實(shi)時(shi)測(ce)量(liang)，人工(gong)糾偏、管(guan)(guan)(guan)內(nei)斷(duan)面開(kai)孔，孔位交錯布置、鋼(gang)管(guan)(guan)(guan)的(de)左右兩側(ce)開(kai)設灌(guan)漿聯通窗等技術措(cuo)施解決了大(da)直徑鋼(gang)管(guan)(guan)(guan)頂進精(jing)度(du)、管(guan)(guan)(guan)間(jian)三角區域土(tu)體清(qing)理(li)以(yi)及管(guan)(guan)(guan)內(nei)及管(guan)(guan)(guan)間(jian)混凝(ning)土(tu)灌(guan)注的(de)密實(shi)度(du)等技術難題，最終完成了該大(da)口徑管(guan)(guan)(guan)幕工(gong)程(cheng)。

沈陽設計圖