Site Selection For The Tunnel Going Through Landslide Sector

For the safety of construction and service of the tunnel going through landslide sector and lessening the influence on landslide stability during excavating tunnel, it's a key and first problem how to pick up a rational site for tunnel when selecting tunnel route for hazard resistant and disaster reduction of the tunnel going through landslide. Such two research means as laboratory model test and FEM are applied to comprehensively and systematically study the states of constructing orthogonal tunnel with basic shaft of landslide under slip band in different landslide mechanical sectors such as main slide sector, trailed sector and anti-slide sector and the states of constructing oblique cross 45 angle tunnel with basic shaft of landslide under slip band in midst of landslide and parallel tunnel with basic shaft of landslide under slip band in anterior part of landslide. The thesis draws the conclusion that the characteristic rule of displacement and stress of landslide in process of tunnel construction at different sectors of landslide and compares the stability of landside excavating tunnel at different landside sectors. The thesis draws the conclusion that the variational rule of tunnel support in process of tunnel construction at different sectors of landslide, discovers the unfavourable mechanical region of initial support of tunnel and evaluates the security of tunnel construction at different landslide sectors. The thesis draws the conclusion that the variational rule of tunnel support at different landslide sectors in condition of rainfall, discovers the unfavourable mechanical region of secondary lining after moving of landslide and valuates the long-term security of constructed tunnel at different landslide sectors. The thesis draws the conclusion that the principle of site selection for the tunnel going through landslide sector by the analysis of the rule of interactivity of landslide and tunnel excavating tunnel at different sectors of landslide. The research of this thesis will have directive function for the design and construction of the tunnel going through landside sector.