Interaction Analysis Between The Slope And The Tunnel And Parametric Quadratic Programming Method's Application

With the rapid development of national economy such as the energy sources, communication, national defense municipal engineering, and mine engineering etc, and implement strategy of in developing of west China, engineering constructions have got more and more in the mountain area. The number of tunnels in sloping ground will increase in the future, so we can foresee that the phenomena of tunnel deformation because of landslide in the sloping ground inevitably largely appear which are complex problems in geotechnical engineering. Surveys reveal that various damages often occur to many tunnels which are constructed in slope, the damages intimately correct with slope activities in the sloping ground, and some damages have influenced the normal operations of tunnels. In the paper, it researches the course of the mutual impetus and the interact between slope and tunnel that it is based on various damages which occur in the Xiaomansahe tunnel in YuanMo express highway of Yunnan province. The key points of this paper are following:(1)Theory research on mechanics interact between slope and tunnel.Based on the investigation and research on predecessor, the structure and cause of landslide, relative position between tunnel and sliding plane and the corresponding deformation features of tunnel are studied. The view that relative position between tunnel and sliding plane is the major cause to determine mode of interact between slope and tunnel is put forward. And the mechanical patterns of tunnels situated different place in landslide are analyzed. Four typical mechanical mechanics models to analyze interrelation between landslide and tunnel deformation are given.(2)Research on parametric quadratic programming method in visco-elasto-plastic problem.In the paper, it has deduced the minimum potential energy principle of visco- elasto-plastic problem, made the yield function to linearization used the Taylor series expansion, established finite element method use parametric quadratic programming in visco-elasto-plastic problem, developed program in two dimensions by Fortran language, and verified the correct of model, method and program through engeering axamples.(3) Example research on the interaction mechanics between slope and tunnel.For example of Xiaomansahe tunnel in YuanMo express highway of Yunnan province which had occurred vast scale damages in the course of construction, in this paper, the interaction mechanism between landslide and tunnel deformation is discussed in detail by several methods such as analytic calculation and numerical analysis method. The achievement of the research is helpful to set up integral theory of tunnel deformation at landslide site, and also can provide theoretical guide for designing effective engineering measures,...