The tunnel between Songjiazhuang Station and Shiliuzhuang Station of Beijing subway line 10 Phase Ⅱ passes through sewage pipeline break area and tunnel top rich-water powder sand stratum.Backward grouting method was adopted for full-section,semi-section and radial deep hole grouting and stratum around tunnel face and vault was grouted,to reduce excavation risk and guarantee acceptable settlement of road surface and building.%北京地铁10号线二期宋家庄站至石榴庄站区间隧道.穿越污水管断裂区域及隧道拱顶富水粉细砂层,施工中采用后退式注浆进行全断面、半断面和径向深孔注浆,对掌子面和拱顶范围地层进行注浆加固,减少了开挖风险,保证了地面道路及建筑物的沉降在允许范围内.
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