高速铁路浅埋隧道超长管棚设计方案研究

京沈高速铁路高丽营隧道穿越六环路酸枣岭互通立交段落,土质、砂质地层自稳能力差,地下水位高,采用浅埋暗挖法施工。超前管棚支护是暗挖段难度最大的项目之一,通过计算分析,结合国内超前管棚应用实例和施工方案的研究,确定采用导向跟管钻进法两侧相向对打施工,一次性施作超前支护,确保结构安全和地面道路正常通行。

Study on Pipe Roof Design of Shallow Tunnel on High-speed Railway

The Gaoliying tunnel on Beijing ~ Shenyang high-speed railway passes through Suanzaoling interchange on the sixth ring road,where soil,sandy strata of poor stability and high underground water level are encountered,and shallow excavation is employed. Advanced pipe roof support is one of the most difficult sections of excavation. Calculation and analysis are conducted with reference to practices of and researches on advanced pipe roof construction,and guide pipe drilling method on both sides to rally for one-time construction with advanced support is determined to ensure the safety of structure and normal road traffic.