The project pre-reinforcement technology mainly refers to the retaining structure used to control the landslide and strengthen the tunnel. The numerical simulation is used to research on effect analysis of different pile-tunnel spacing on tunnel-landslide system under the action of anti-slide pile reinforcement with the upper retaining and lower support type, and the mechanism of this anti-slide pile on the tunnel-landslide system deformation control. Research shows that in the tunnel excavation of the landslide section, that the anti-slide pile reinforcement with the upper retaining and lower support type is taken as the the supporting structure to make a pre-reinforcement for the tunnel-landslide system, has a significant effect on the control of tunnel deformation, can improve the tunnel structure stress, and the reasonable distance between pile and tunnel is good on the security of the tunnel structure.%工程预加固技术主要指通过支挡结构来治理滑坡和加固隧道.采用数值模拟研究在"上挡下托式"抗滑桩预加固作用下,不同桩-隧间距对隧道-滑坡体系的影响,并分析了上挡下托式抗滑桩对隧道-滑坡体系变形控制的作用机理.研究表明:在滑坡段开挖隧道,采用上挡下托式抗滑桩为支挡结构对隧道-滑坡体系进行预加固,对控制隧道变形有着显著的效果,抗滑桩支挡结构可以改善隧道结构的受力,同时合理的桩-隧间距有益于隧道结构的安全.
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