高切坡失稳动力机理研究

工程开挖形成的高切坡,由于卸荷作用,往往会出现卸荷裂缝,潜滑体在重力作用下会向下蠕动,致使其中部固锁段受到挤压而储存了弹性应变能,当固锁段存储的剪切应变能达到岩体的抗剪强度时,滑体就会失稳运动。运用能量守恒定律及动力学有关理论得出了滑体的启程速度、滑动速度和滑行距离方程。以2001年5月1日发生在重庆武隆的高切坡失稳为例进行了验证,并得到了好的成效,为确定滑体的致灾能力及致灾范围提供了依据,有利于更好地防灾减灾。

Study on Dynamic Mechanism of High-Cutting Slope Deformation

High-cutting slope formed in the excavation of the profect,as to uploading effects,will appear uploading fissure easily.Latent slide will get down and creep ander the action of gravity,which causes some of the firm segment pressed to store elastic strain energy.As the firm segment store shear stress reaching the shear strength of rock mass,slide will have deformation movement.Some correlation theory of the low of conversation and the dynamics are used to obtain the slide's motivating velocity,sliding velocity and sliding distance equation.The example that deformation of high-cutting slope took place in Wulong Chongqing on May 1st,2001 is tested by this method and does well.Evidence is offered to confirm the capability and scope of leading to disastrous of slide,which is in faver of better prevention or reduction against the disaster.