工程扰动对隧道-滑坡正交体系影响的试验研究

Experimental Study on the Influence of Engineering Disturbance on the Tunnel-landslide Orthogonal System

研究目的:本文通过地质力学模型试验,研究后排埋入式抗滑桩布置间距的差异对隧道-滑坡正交体系的影响,重点讨论在加载和坡脚开挖工况下,后排埋入式抗滑桩布置间距的差异对坡脚预应力锚索抗滑桩的桩顶水平位移和隧道应变的影响,以及后排埋入式抗滑桩桩顶水平位移的变化趋势。研究结论:(1)后排埋入式抗滑桩布置间距差异,对主滑段左半幅埋入式抗滑桩的受力状态影响较大。(2)后排埋入式抗滑桩布置间距差异,对坡脚对应部分的预应力抗滑桩受力状态有较大影响。(3)后排埋入式抗滑桩布置间距差异对隧道沿纵向应变分布规律有较大影响;加载和坡脚开挖对滑坡稳定均有一定的影响。

Research purposes: This paper mainly studies, with the Tunnel-Landslide Orthogonal system, the influence of the different distance of back row buried anti-slide piles through large geological mechanics simulation model test, and mainly analyzes that the different distances of back row buried anti-slide piles affect the displacement of the anchor anti-slide piles in the slope toe, the strain of Tunnel, and change of the displacement of back row buried anti-slide pile in two stages of the application of load and slope toe cutting. Research conclusions: In two stages of the application of load and slope toe cutting:(1) the different distance of back row buried anti-slide piles produce a larger influence on the left of the main section of the back row buried anti-slide piles;(2)the different distance of back row buried anti-slide piles affect the force of the corresponding anchor anti-slide piles in the slope toe;(3) the different distance of back row buried anti-slide piles have a great influence on the tunnel along the longitudinal strain, and the application of load and slope toe cutting affect the security and stability of landslide to some degree.