利用关键块体理论估计岩石隧道的塌方部位

An Estimation of Removable Block Positions in Rock Tunnel by Key Block Theory

关鍵块体理论适用于分析为节理切割的岩体中隧道的稳定问題.石根华,古德曼等已提出在隧道断面上确定块体可能移动最大范围的方法,但在实际工作中,仅知其移动最大范围是不够的,还需确定可能滑动块体的具体位置,方便于加固处理.本文即在已确定块体移动最大范围的基础上,进一步确定可能滑动块体在隧道断面上的具体位置,并用计算机绘图输出结果.

Key Block Theory can be used to analyze stability of tunnel in rock mass intersected by joints. A method for determination of the maximum removable area was proposed by Goodman et al. But it is not enough for construction practice. In order to carry out reinforcements removable block positions should be determined. For such problem, the authors show the result of determination of removable block positions based on the maximum removable area.