论文部分内容阅读
在隧道开挖施工方法中,钻爆法掘进对地表建筑物稳定影响显著。隧道扩建是在原有隧道结构上改造扩大,在隧道扩建施工中更应该注意施工给周围环境带来的影响。根据周边建筑物情况,在确定了重庆渝中区鹅岭隧道扩建工程爆破震动效应质点允许最大振动速度的基础上,利用LS-DYNA动力有限元分析软件对该工程爆破震动进行了模拟,获得了重庆渝中区鹅岭隧道扩建工程爆破开挖过程中的最大段装药控制量,综合经验公式计算结果确定了较为合理的火工品单位体积消耗量,并提出了减小单位消耗量的方法。为类似工程在投标报价和施工组织上提供了重要的参考数据。
In the tunnel excavation construction method, the drilling and blasting method has a significant impact on the stability of the surface buildings. Tunnel expansion is to transform the original tunnel structure to expand, construction of the tunnel expansion should pay more attention to the impact of the construction to the surrounding environment. According to the situation of the surrounding buildings, the blasting vibration of this project was simulated by LS-DYNA dynamic finite element analysis software on the basis of the maximum permissible vibration velocity of blasting vibration effect of Ealing Tunnel Extension Project in Chongqing Yuzhong District. The maximum segment charge control during the blasting excavation of the Ealing Tunnel Extension Project in Yuzhong District and the calculation result of the comprehensive empirical formula confirm the reasonable unit volume consumption of the explosive products and put forward the method of reducing the unit consumption. For similar projects in the tender offer and construction organization provides important reference data.