北京地铁熊猫环岛联络线三联拱隧道施工技术研究

Study on Construction Technology of A 3-arch Tunnel on Xiongmaohuandao Link Line in Beijing Metro

北京地铁十号线熊猫环岛联络线三联洞隧道穿越粉质黏土和中粗砂地层,采用浅埋暗挖CRD工法施工,中洞先行开挖,然后开挖两侧隧道,分部衬砌,施工过程中受力转换复杂,分部沉降对地层影响大,通过采用合理施工方法,信息化调整支护参数,确保了结构的安全稳定,解决了复杂受力结构浅埋隧道开挖的难题。

The 3-arch tunnel on Xiongmaohuandao link line of Line 10 in Beijing Metro passes through the ground consisting of silty clay and medium-coarse sand, which is constructed by means of the CRD method. The central drift of the tunnel is excavated first, which is followed by the excavation of the side drifts. The conversion of the force-bearing of the tunnel during construction is very complex and the settlement occurring in different excavation steps has great impact on the settlement of ground. By means of adopting proper construction methods and modifying the reinforcement parameters on the basis of the monitoring data, the safety and stability of the tunnel are guaranteed and the difficult problems in the construction of shallow tunnels with complex force-bearing structures are solved.