单层后缘张裂型顺层岩坡破坏机理分析

Analysis on Failure Mechanism of the Single Layer Rock Bedded Slope with a Back Crack

针对单层后缘张裂型顺层岩坡,分析了其在水力作用下边坡的破坏机理,改进了孔口未被堵塞条件下的水力模型,补充了孔口堵塞条件下的水力模型,推导了不同条件下临界充水高度的表达式。研究表明,水力作用的大小与后缘张裂隙的充水高度密切相关;且孔口被堵塞时,较未被堵塞条件下的顺层岩质边坡,其稳定性大幅下降,极易发生顺层滑移破坏。

In the light of the single layer rock bedded slope with a back crack,the failure mechanism of the slope under the hydraulic action is discussed,the hydraulic model under the condition of unblocked outflow orifice is improved,the hydraulic model under the condition of blocked outflow orifice is supplemented,and the formula of the critical water filling height under different conditions is deduced. The results show that the hydraulic action is closely related to the water filling height of the back crack,and the stability of the rock bedded slope drops sharply when the rock bedded slope's outflow orifice is blocked.