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目前对用抗滑桩整治边坡段隧道以及对抗滑桩工作性能的研究较多,但对降雨和桩-隧间距差异对隧道-边坡稳定的影响研究较少。为研究降雨及桩-隧间距对抗滑桩受力及隧道变形的影响,分别采用桩-隧间距为80,160 cm的埋入式抗滑桩布置于滑体主滑段,通过模拟不同强度降雨,以研究降雨及桩-隧间距对隧道变形、抗滑桩桩头变形的影响。试验表明:1)小雨阶段,雨水渗入浅层滑体,桩-隧间距差异对抗滑桩受力分布及桩头位移变化影响不大;2)中—大雨阶段,雨水逐渐渗入到深层滑体,动水压增大,下滑力较快增大,桩-隧间距差异对抗滑桩受力影响较大,较小的桩-隧间距,不利于坡体的稳定。3)从隧道变形曲线来看,隧道山侧应变比河侧应变要大,且桩-隧间距为80 cm的隧道应变比160 cm段的应变大。
At present, there are many studies on the performance improvement of anti-slide piles and anti-slide piles using anti-slide piles. However, there is little research on the influence of the differences of rainfall and pile-tunnel distances on the stability of tunnels and slopes. In order to study the effect of rainfall and pile-tunnel spacing on the stress of anti-slide pile and the deformation of tunnel, buried anti-slide piles with pile-to-tunnel spacing of 80 and 160 cm are respectively placed on the main slide of the slide. By simulating rainfall with different intensities, Study on the effects of rainfall and pile-tunnel spacing on tunnel deformation and anti-slide pile head deformation. The results show that: 1) During the rainy season, the infiltration of rainwater into the shallow landslide body and the difference of the pile-tunnel distance have little effect on the stress distribution of the anti-sliding pile and the displacement of the pile head; 2) Hydrodynamic pressure increases, the sliding force increases rapidly, and the difference of pile-tunnel distance has a great influence on the stress of anti-sliding pile. The smaller pile-tunnel distance is not conducive to the stability of the slope. 3) From the tunnel deformation curve, the strain on the mountain side of the tunnel is greater than that on the river side, and the strain at the tunnel with pile-tunnel distance of 80 cm is larger than that at 160 cm.