Research On Partial Reinforcing Structure Of Tunnel Though Landslides Sector

Faced with the construction of traffic tunnels encountered deep landslide that is governanced difficultly, partial reinforcing structure for a tunnel through landslide sector is proposed, that is within the scope of the tunnel cross section, prestressed anchor in the horizontal direction, anti-slide piles in the vertical direction.Firstly, the transfer matrix method deduced the calculation theory of tunnel lining, invert structure and anti sliding pile, the point matrix of the role of prestressed anchor on lining structure and vehicle load on invert structural was added to transfer matrix of the computing unit, and in light of a typical engineering example, the internal force and deformation of tunnel structure and reinforcement structure were analysed by the principles of the single variable, results show that the internal force and deformation of tunnel structure and reinforcement and displacements structure changed significantly when tensile stiffness of prestressed anchor is between 104kN/m and 105kN/m; prestressed anchor should be located as close to the lower left corner of the tunnel lining section; prestress of prestressed anchor has a greater impact on invert the tunnel structure and the supporting pile internal force.Secondly, referring to the actual engineering prototype, using a similar theory two models tests by using a similar theory:a set of tests for no partial reinforcing structure of a tunnel through landslide sector; another for partial reinforcing structure of a tunnel through landslide sector. The results show that internal force distribution more reasonable after the reinforcement structure is applied to the tunnel structure in the cross section; because of the constraints of the tunnel longitudinal reinforcement structure, the displacement is also significantly reduced, while the deformation of landslide is also limited, partial reinforcing structure for a tunnel through landslide sector proved reasonable and effective.Finally, to explore the mechanism of the interrelationship of the tunnel longitudinal and transverse, additional load was generated by the cross-sectional when unbalance shear and bend of longitudinal of a tunnel have an effect on tunnel the transverse of the tunnel, the results show that:the research of spatial stress of the tunnel structure is necessary because longitudinal and transverse force affect each other, adding the factors of the longitudinal force of a tunnel, transverse force and deformation of a tunnel are more realistic the process of the force and deformation process of the tunnel cross-section.