摘要
随着地下工程建设项目越来越多,如何评价邻近隧道受影响程度是新隧道建设需要考虑的前提之一。建立静力模型模拟邻近隧道衬砌的现有受力状态,分析新隧道开挖时所引起的邻近隧道衬砌应力重分布。建立动力模型分析新隧道爆破时应力波导致邻近隧道2次衬砌产生的应力状态,并将静力模型和动力模型中隧道衬砌的应力进行矢量叠加,以评判新隧道爆破开挖对邻近隧道的影响。如果爆破振速或任一阶段应力值超出安全值,则需对新隧道施工采取必要的控制措施,以保证邻近隧道的安全。
With the increasing number of underground construction projects,evaluation of the influence degree of adjacent tunnels is one of the prerequisites for the construction of new tunnels. In this paper,static model is set up to simulate the existing stress state of adjacent tunnel lining,so to analyze the stress distribution of adjacent tunnel linings during new tunnel excavation. The dynamic state model is then set up to analyze the stress state of the secondary lining of the adjacent tunnel caused by the stress wave from new tunnel blasting,and the stress of the tunnel lining in the static model and dynamic model is superimposed to evaluate influence to adjacent tunnel during new tunnel excavation and blasting. If the blasting vibration velocity or the stress value of any stage exceeds the safe value,necessary control measures should be taken for the new tunnel construction to ensure the safety of adjacent tunnels.
出处
《公路交通技术》
2016年第6期100-105,共6页
Technology of Highway and Transport
基金
重庆市应用开发(重大)项目(csct2013yykf C30001)
关键词
隧道施工
爆破振速
安全评价
应力
监控量测
数值模拟
tunnel construction
blasting vibration velocity
safety evaluation
stress
monitoring ＆ measuring
numerical simulation
