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针对位于深厚滑坡体中隧道的加固问题,提出利用锚索、抗滑支撑桩只对与隧道稳定直接相关的洞周滑坡体进行抗滑及锚固处治,同时加固隧道衬砌结构,使隧道衬砌结构、抗滑支撑桩与锚索形成一种新型的滑坡隧道自锚式加固结构体系。该加固结构将滑床作为桩和锚索稳定的支撑点,属于超静定结构。针对该加固结构体系的特点建立其物理力学模型,并采用传递矩阵法进行理论推导,求得加固结构体系的内力与位移。通过算例分析结果表明,锚索的作用使隧道边墙不利受力状态有所改善,抗滑支撑桩对隧道底铺和衬砌的变形有所约束,可以通过锚索和抗滑支撑桩结构,使隧道衬砌结构的受力和变形得到优化控制。
In view of the problem of the reinforcement of the tunnel in the deep landslide, it is proposed that the use of the anchor cable and the anti-slip piles only provide anti-skidding and anchoring treatment for the tunnel-borne landslides directly related to the stability of the tunnel and reinforce the tunnel lining structure, Anti-slip support pile and anchor cable form a new type of self-anchored landslide tunnel reinforcement system. The reinforcing structure uses the sliding bed as a stable supporting point of the pile and the anchor rope, and belongs to the statically indeterminate structure. According to the characteristics of the reinforced structural system, its physical and mechanical model is established, and the theoretical derivation is made by the transfer matrix method to obtain the internal force and displacement of the reinforced structural system. The results of numerical examples show that the effect of the anchor cable can improve the unfavorable stress state of the side wall of the tunnel, and the anti-slip support pile restrains the deformation of the tunnel bottom lining and the lining. By means of the anchor cable and the anti-slip support pile structure, So that the tunnel lining structure of the force and deformation are optimal control.