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通过对西源岭320、350、380、410m4个台阶边坡的优势结构面进行赤平投影分析,得到410平台有5种组合情况、380平台有1种组合情况、350平台有3种组合情况、320平台有1种组合情况可能发生楔形体破坏,以及410平台1处、350平台1处、320平台1处可能发生单平面破坏。然后,运用刚体极限平衡方法对各种实际的潜在破坏面进行天然及暴雨2种工况下的稳定性分析,得到了380平台F380-01与F380-02所控制的楔形体破坏在天然状态和暴雨状态下小于安全系数、350平台F350-03与F350-04控制的楔形体破坏以及320平台F320-11所控制的单平面破坏在天然工况下大于安全性系数、暴雨工况下小于安全性系数的结论。对比分析可知,赤平投影法可以很快速地搜索到可能滑动的结构面组合方式,但是要判断实际结构面组合是否滑动还需要进行定量分析。
According to the stereoscopic projection analysis on the dominant structural planes of 320, 350, 380 and 410m4 steps of Xiyuanling, there are five combinations of 410 platforms, one combination of 380 platforms, three combinations of 350 platforms, One combination of the 320 platforms may wedge-shaped body damage, as well as the 410 platform 1, 350 platform 1, 320 platform 1 may occur single-plane damage. Then, using the rigid body limit equilibrium method to analyze the stability of two kinds of actual and potential damage surfaces under two kinds of natural and heavy rainfall conditions, the wedge-shaped bodies controlled by F380-01 and F380-02 of 380 platform were destroyed in natural state and Under rainstorm conditions, the safety factor is less than the safety factor. The failure of the wedge body controlled by the F350-03 and F350-04 platforms of the 350 platform and the single plane failure controlled by the F320-11 platform 320 are greater than the safety factor under natural conditions and less than the safety under rainstorm conditions The conclusion of the coefficient. Contrastive analysis shows that the stereographic projection method can quickly search for the combination of structural planes that may slip, but quantitative analysis is needed to determine whether the actual structural plane combination slides or not.