【摘 要】
：
受复杂地质、水文及地面荷载的影响,隧道周边围岩应力状态复杂多变,相邻隧道在开挖时相互受到影响。结合深圳轨道交通2号线湾厦站—东角头站区间段左、右线隧道暗挖工程,在施
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受复杂地质、水文及地面荷载的影响,隧道周边围岩应力状态复杂多变,相邻隧道在开挖时相互受到影响。结合深圳轨道交通2号线湾厦站—东角头站区间段左、右线隧道暗挖工程,在施工中采用左右线隧道同方向工作面错开施工、单个隧道工作面采用“双层小导管管棚+小导管超前预注浆加固”的上下台阶法施工技术,降低了近距离双线隧道施工的相互影响,确保了隧道的施工安全稳定。这为类似工程的施工提供了借鉴。
Under the influence of complex geology, hydrology and ground load, the surrounding rock mass around the tunnel is complex and changeable in its stress state, and adjacent tunnels are affected by each other during excavation. Combined with the left and right tunnel undercut sections of Wanxia station - Dongjiaotou station section of Shenzhen Metro Line 2, the construction of left and right tunnels is staggered with the same direction of the face, and the single tunnel face adopts the double layer Pipe pipe shed + small pre-grouting pipe advance reinforcement "step-down method of construction technology to reduce the impact of the construction of close-range two-lane tunnel interaction to ensure the safety and stability of the tunnel construction. This provides a reference for the construction of similar projects.
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