Analysis of factors influencing anti-slip pile support in tunnel landslide systems for tunnels with different burial depths

Mechanical properties of the combined medium-diameter anti-slide piles and tunnels under landslide loads at different sliding zone angles

“…The maximum stress on the tunnel lining is approximately 1.1 times higher than that of h-type anti-slide piles, while for round piles, it is about 1.63 times higher than that of h-type combined piles. The support provided by combined medium-diameter piles and h-type combined piles facilitates a uniform distribution of stress on the tunnel lining, leading to a substantial reduction in bias stress phenomena compared to circular and square piles [25]. Fig.…”

“…36 reveals a minimal disparity in the anti-slide performance between combined medium-diameter anti-slide piles and h-type anti-slide piles. Nevertheless, in practical scenarios, the construction cost of h-type anti-slide piles with an equivalent cross-sectional area surpasses that of the combined medium-diameter anti-slide piles [25]. Consequently, for comparable projects, opting for combined medium-diameter anti-slide piles yields superior cost-effectiveness.…”

“…Additionally, some scholars [22,23] have explored the mechanism of tunnel deformation in the secondary excavation support of existing tunnels and proposed appropriate support methods. Some scholars [24,25] have also analysed different support factors to obtain the force characteristics of tunnel lining under different support conditions. The tunnel-landslide system has been extensively studied by experts and scholars.…”