【摘要】：目前對(duì)用抗滑樁整治邊坡段隧道以及對(duì)抗滑樁工作性能的研究較多,但對(duì)降雨和樁-隧間距差異對(duì)隧道-邊坡穩(wěn)定的影響研究較少。為研究降雨及樁-隧間距對(duì)抗滑樁受力及隧道變形的影響,分別采用樁-隧間距為80,160 cm的埋入式抗滑樁布置于滑體主滑段,通過(guò)模擬不同強(qiáng)度降雨,以研究降雨及樁-隧間距對(duì)隧道變形、抗滑樁樁頭變形的影響。試驗(yàn)表明:1)小雨階段,雨水滲入淺層滑體,樁-隧間距差異對(duì)抗滑樁受力分布及樁頭位移變化影響不大;2)中—大雨階段,雨水逐漸滲入到深層滑體,動(dòng)水壓增大,下滑力較快增大,樁-隧間距差異對(duì)抗滑樁受力影響較大,較小的樁-隧間距,不利于坡體的穩(wěn)定。3)從隧道變形曲線來(lái)看,隧道山側(cè)應(yīng)變比河側(cè)應(yīng)變要大,且樁-隧間距為80 cm的隧道應(yīng)變比160 cm段的應(yīng)變大。
[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.
【作者單位】： 蘭州交通大學(xué);中鐵西北科學(xué)研究院有限公司;中國(guó)鐵道科學(xué)研究院研究生部;
【基金】：鐵道部科技研究開(kāi)發(fā)計(jì)劃重點(diǎn)課題(2010G018-C-3-1) 甘肅省交通建設(shè)科研項(xiàng)目(200813) 中國(guó)中鐵股份有限公司科技開(kāi)發(fā)項(xiàng)目(20160203)
【分類(lèi)號(hào)】：U456

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