摘要
隧道通过潜在地震地区时,存在活动断层的错动形成的重大工程地质问题的威胁。基于断裂几何学和震源的运动学特征,以广州地区活动断裂为研究背景,通过在断层左右盘施加一定的速度荷载,模拟了断层错动达到0.28m时对隧道的影响,得出隧道结构在断层错动影响下的位移和应力的变化规律。分别建立隧道结构距离断层50m、100m、150m三个模型,比较了三种情况下的位移和应力状况,归纳出隧道与断层之间的安全距离。
The slip movement of seismogenic faults is a serious engineering-geological problem to underground structures such as tunnel. In this paper, by putting a displacement load on the left and right parts of a fault, the changing stresses and displacements of the tunnel caused by the slip of the seismogenic fault are calculated when the two parts slip for 0.28m, based on the geometric and kinematic characteristics of the fault. The stresses and displacements are compared using three models setting for 50m, 100m and 150m respectively between the fault and the tunnel. The safe distance between the fault and the tunnel is estimated based on the result of calculations.
出处
《华南地震》
2009年第1期33-41,共9页
South China Journal of Seismology
基金
国家自然科学基金(40674016)
国家地震行业科研专项基金([2007]203/8-53)
天津市科技创新专项资金[滨海新区软土地基地震和交通荷载作用效应研究(07FDZDSF02102)]
关键词
断层错动
隧道
安全距离
数值模
Slip of fault
Tunnel
Safe distance
Numerical simulation
