摘要
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10～20m，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。
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.
出处
《铁道建筑》
北大核心
2014年第4期68-70,共3页
Railway Engineering
关键词
铁路隧道
黄土地层
下穿
地表沉降
控制爆破
Railway tunnel
Loess strata
Passing through
Surface subsidence
Controlled blasting
作者简介
曹海滨（1970-），男，山西应县人，高级工程师。
