【作者】 尧少敏； 陈克大； 刘冬； 叶春琳； 高文学； 石连松；

【Author】 Yao Shaomin;Chen Keda;Liu Dong;Ye Chunlin;Gao Wenxue;Shi Liansong;School of Architecture and Civil Engineering,Beijing University of Technology;Beijing Municipal Road and Bridge Engineering Administration Department;Beijing Road Engineering Quality Surveillance Station;Beijing Municipal Road and Bridge Engineering Co.,Ltd.;

【机构】 北京工业大学建工学院； 北京市政路桥养护管理集团； 北京市道路工程质量监督站； 北京市政路桥股份有限公司；

【摘要】 基于东长峪隧道改扩建工程,结合部分段扩建隧道与既有隧道分叉并逐渐分离的特点,研究了多临空面下隧道的爆破开挖技术,并选取拱顶空洞段作为典型断面,对爆破参数进行了合理设计;同时,通过在既有隧道两侧进行爆破震动监测,分析了既有隧道内爆破震动特点及其传播规律。研究结果可为该隧道爆破参数调整和空洞段支护方式选取提供依据。更多还原

【Abstract】 Based on reconstruction and extension works of the Dongchangyu tunnel,the tunnel blasting excavation technology under multi-free face is stuthed by following the characteristics of the bifurcating and separating of the reconstructed tunnel section from the existing one,and the tunnel section with vault cavity is selected as a typical cross-section to design the blasting parameters rationally.Meanwhile,through blasting vibration monitoring on both sides of the existing tunnel,the characteristics of blasting vibration and its propagation law in the existing tunnel are analyzed.Research results can provide a basis for adjusting the tunnel blasting parameters and selecting the support type to the cavity section.更多还原