降雨及桩-隧间距对隧道-滑坡稳定性影响的试验研究
发布时间：2018-12-09 07:59
【摘要】：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。
[Abstract]:At present, there are many researches on the working performance of anti-slide pile and anti-slide pile, but the influence of rainfall and pile-tunnel distance difference on the stability of tunnel slope is less studied. In order to study the influence of rainfall and pile-tunnel spacing on the stress of sliding pile and tunnel deformation, the embedded anti-slide piles with pile-tunnel spacing of 80160 cm were arranged in the main slide section of the sliding body, and the rainfall of different intensity was simulated. The effects of rainfall and pile-tunnel spacing on tunnel deformation and pile head deformation of anti-slide pile were studied. The results show that: 1) in the stage of light rain, Rain Water infiltrates the shallow sliding body, and the difference of pile-tunnel spacing has little effect on the stress distribution of the pile and the displacement of the pile head; 2) in the medium-heavy rain stage, Rain Water gradually seeped into the deep sliding body, the hydrodynamic pressure increased, the sliding force increased rapidly, the difference between pile and tunnel distance affected the sliding pile force greatly, and the pile-tunnel spacing was smaller. From the point of view of tunnel deformation curve, the strain of the mountain side of the tunnel is larger than that of the river side, and the strain of the tunnel with the pile-tunnel spacing of 80 cm is larger than that of the section of 160 cm.
【作者单位】： 兰州交通大学;中铁西北科学研究院有限公司;中国铁道科学研究院研究生部;
【基金】：铁道部科技研究开发计划重点课题(2010G018-C-3-1) 甘肃省交通建设科研项目(200813) 中国中铁股份有限公司科技开发项目(20160203)
【分类号】：U456
[Abstract]:At present, there are many researches on the working performance of anti-slide pile and anti-slide pile, but the influence of rainfall and pile-tunnel distance difference on the stability of tunnel slope is less studied. In order to study the influence of rainfall and pile-tunnel spacing on the stress of sliding pile and tunnel deformation, the embedded anti-slide piles with pile-tunnel spacing of 80160 cm were arranged in the main slide section of the sliding body, and the rainfall of different intensity was simulated. The effects of rainfall and pile-tunnel spacing on tunnel deformation and pile head deformation of anti-slide pile were studied. The results show that: 1) in the stage of light rain, Rain Water infiltrates the shallow sliding body, and the difference of pile-tunnel spacing has little effect on the stress distribution of the pile and the displacement of the pile head; 2) in the medium-heavy rain stage, Rain Water gradually seeped into the deep sliding body, the hydrodynamic pressure increased, the sliding force increased rapidly, the difference between pile and tunnel distance affected the sliding pile force greatly, and the pile-tunnel spacing was smaller. From the point of view of tunnel deformation curve, the strain of the mountain side of the tunnel is larger than that of the river side, and the strain of the tunnel with the pile-tunnel spacing of 80 cm is larger than that of the section of 160 cm.
【作者单位】： 兰州交通大学;中铁西北科学研究院有限公司;中国铁道科学研究院研究生部;
【基金】：铁道部科技研究开发计划重点课题(2010G018-C-3-1) 甘肃省交通建设科研项目(200813) 中国中铁股份有限公司科技开发项目(20160203)
【分类号】：U456
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