岩体倾覆的多块体分析

倾覆是岩体失稳破坏的主要方式之一。岩体的倾覆可能呈单块体状,即岩体在其失稳的过程中仍保持其整体性;也可能呈多块体状,即岩体在其失稳的过程中分裂成多个块体,各块体之间产生差异运动,岩体发生解体。对倾角陡立的层状结构岩体及其有条块状结构的岩体,这种多块体倾覆较为常见。

AN ANALYSIS OF MULTIPLE——BLOCK TOPPLING

The multiple-block toppling is a kind of failuring of rock mass. On basis of the study of multi-block toppling process the analytical equations are derived in detail, in which the external loads, the gravity of rock mass, the osmotic pressure, and the tesile strength of rock mass, the fraction on inter-block surface and some other factors are incorporated. The program of the toppling and the toppling-sliding analyses has been compiled in Fortran-Ⅳ. Using the program the various factors effecting the toppling of rock mass is discussed. It has been applied to the abutment of the arch dam, the results show that the toppling analysis is necessary and effective for the estimation of the stability of this dam abutment.