摘要
在洞库开挖过程中,爆破振动对邻近新浇筑衬砌结构的影响是不可忽视的。本文针对某大型地下洞库,根据爆破振动特点采取数值模拟方法,分析了爆破振动对不同龄期的新浇混凝土衬砌的影响;利用混凝土应力破坏准则,对现场爆破情况下的混凝土衬砌做出安全判断。此判断对现场爆破开挖有指导作用,对类似工程有借鉴作用。
During the process of tunnel excavation, the effect of the blasting Vibration on the adjacent freshly-cast (newly cast )concrete liner could not be ignored. This paper, regarding a large-scale tunnel, and based on the research of the rules about the stress wave in the rock and the numerical simulation established by using dynamical FEM software, the effect of blast vibration order on the concrete liner with different age was discussed. According the concrete failure criterion, the judgment of the safety of the concrete liner at the blasting site could be judged. And this may act as guidance to the similar engineering.
出处
《工程爆破》
2008年第1期8-11,77,共5页
Engineering Blasting
关键词
爆破振动
混凝土衬砌
数值模拟
破坏准则
Blasting vibration
Concrete liner
Numerical simulate
Failure criterion