保康隧道穿越断层破碎带施工控制技术

Construction Control Technology of Baokang Tunnel Passing Through Fault Fracture Zone

隧道掘进穿越断层和节理裂隙破碎带施工过程中易发生塌方、涌水突泥等灾害事故。为保证隧道穿越多裂隙带的施工安全,降低施工灾害发生的概率,施工前有必要选择合适的施工方法。保康隧道在穿越断层破碎带选择了CRD法施工技术,并且通过优化爆破参数,减弱隧道爆破振动对断层破碎带的扰动,使其安全通过多条破碎带,其控制技术可供类似工程借鉴。

It is easy to collapse mass, gush water and burst mud when the tunnel passes through the fault and the joint fracture zone by excavating, in order to ensure the construction safety while the tunnel passing through the fracture zone, reduce the probability of construction disasters, it is necessary to choose the appropriate construction methods before construction. The construction technology of CRD method is adopted in Baokang Tunnel. By optimizing the blasting parameters, the disturbance of fault fracture zone is weakened from the tunnel blasting vibration, ensuring the safety through a plurality of broken belt, its control technology could be used as a reference for similar engineering.