张呼客专浅埋隧道下穿长城烽火台遗址施工技术∗

摘要

张呼客专以浅埋隧道下穿长城烽火台遗址，施工期隧道爆破施工产生的振动和拱顶下沉会造成烽火台的开裂、倾斜、坍塌。施工实践中通过控制最大用药量及爆破方法，保证长城烽火台遗址振动速度、地表总沉降和变形速率满足安全要求，降低了爆破引起的地震效应对长城烽火台遗址的危害，为类似工程提供借鉴。%The Hu Zhang Passenger Line passes through the beacon tower of the great wall with shallow buried tunnel . During the construction the vibration caused by the tunnel blasting and the vault subsidence will cause the cracking, tilting and collapse of beacon tower. In the construction practice, controlling the maximum dosage and blasting methods can ensure that the Great Wall beacon tower ruins vibration velocity, surface total settlement and deformation rate meet safety requirements, and reduce the dangerous seismic effects of blasting, which pro⁃vides a reference for similar projects.