铁道建筑
鐵道建築
철도건축
RAILWAY ENGINEERING
2014年
4期
68-70
,共3页
铁路隧道%黄土地层%下穿%地表沉降%控制爆破
鐵路隧道%黃土地層%下穿%地錶沉降%控製爆破
철로수도%황토지층%하천%지표침강%공제폭파
Railway tunnel%Loess strata%Passing through%Surface subsidence%Controlled blasting
巴准铁路敖包沟隧道出口段在黄土地层中连续下穿敖家沟西梁煤矿职工宿舍、职工食堂及变电站三栋建筑物，洞顶覆土厚度约10～20 m，隧道洞身岩性为砂质黄土与软弱砂岩夹泥岩。为减少隧道下穿施工对建筑物造成的影响，进行了地表沉降监测，并根据地表沉降随时间和隧道开挖步的变化规律，采取了超前管棚加固、短台阶法开挖以及控制爆破源与传播途径三项措施。实践证明该措施切实可行，可供类似工程参考。
巴準鐵路敖包溝隧道齣口段在黃土地層中連續下穿敖傢溝西樑煤礦職工宿捨、職工食堂及變電站三棟建築物，洞頂覆土厚度約10～20 m，隧道洞身巖性為砂質黃土與軟弱砂巖夾泥巖。為減少隧道下穿施工對建築物造成的影響，進行瞭地錶沉降鑑測，併根據地錶沉降隨時間和隧道開挖步的變化規律，採取瞭超前管棚加固、短檯階法開挖以及控製爆破源與傳播途徑三項措施。實踐證明該措施切實可行，可供類似工程參攷。
파준철로오포구수도출구단재황토지층중련속하천오가구서량매광직공숙사、직공식당급변전참삼동건축물，동정복토후도약10～20 m，수도동신암성위사질황토여연약사암협니암。위감소수도하천시공대건축물조성적영향，진행료지표침강감측，병근거지표침강수시간화수도개알보적변화규률，채취료초전관붕가고、단태계법개알이급공제폭파원여전파도경삼항조시。실천증명해조시절실가행，가공유사공정삼고。
Exit section of Aobaogou tunnel in Bazhun Railway is located in loess strata,which continuously passes through workers' dormitory,workers' dining hall and substation of Xiliang Coal Mine in Aojiagou. The thickness of covering soil is about 10 ~20 m and the geology of the tunnel is complex strata of sandy loess and soft sandstone interbedded mudstone. In order to reduce the influence of tunnel construction passing through the buildings,surface subsidence monitoring is used for the project and three measures including advanced pipe roof reinforcement,short step method for excavation and controlling blasting source and transmission path are adopted according to surface subsidence variation with time and tunnel excavation step. Practice has proved that the measures are feasible and could be a reference for the similar project.
