棚洞施作时机对高边坡稳定性及棚洞结构的影响

目前棚洞结构的设计通常是在稳定边坡的基础上进行设置的，一般不考虑棚洞对不稳定边坡的作用；而实际上棚洞结构也是一个大型的支挡结构体系，对边坡稳定性是有帮助的。为了分析棚洞对边坡稳定性的影响，提出“边坡开挖应力释放系数”的概念，通过对棚洞不同施作时机的数值模拟，分析不同施作时机下棚洞对高边坡稳定性以及边坡对棚洞结构内力的影响，从而为选取棚洞结构的合理施作时机提供依据。

Influence of Opportunity for Construction of Shed-tunnel on Stability of High Slope and Structure of Shed-tunnel

At present design of shed-tunnel structure is usually established on the basis of stable slope and in general the effect of shed-tunnel on unstable slope is not considered.However,the shed-tunnel structure is also a large-scale retaining structure system helpful for slope stability.In order to analyze the influence of shed-tunnel on slope stability,this paper proposes the concept of stress release coefficient of slope excavation and analyzes influence of shedtunnel on stability of high slope and of slope on...