Study On Anti-seepage Reinforcing Of The Reservoir Earth-rock Dam On Soft Soil Foundation

It Is common problem in earth dam seepage problem that seriously affect the safe operation of the reservoirs,vibration shot rushed into a groove diaphragm wall is Shandong Water ASTRI research and development of a new method of the construction of underground continuous diaphragm wall.Which use mechanical cut into slot device soil removed into a groove,form continuous diaphragm wall casting self-congealing mortar.The dilapidated reservoir seepage problem is widespread in China,research on evaluation of the reservoir reinforcement effect is very few,therefore,of earth dam seepage problems and anti-seepage reinforcement effect research has important significance.(1)The continuity equation of seepage flow and the concept of unsaturated soil are introduced,and the finite element model is introduced in this paper.Using the finite element software ABAQUS to a numerical simulation of the two-dimensional saturated-unsaturated seepage earth-rock.Two kinds of different methods are used to calculate,through the comparative analysis of the calculation results,it is proved that the software is feasible to simulate the seepage flow problem.(2)This paper studies the influence factors of earth dam seepage,the introduction of the basic equation for saturated and unsaturated seepage,using large-scale finite element software ABAQUS to a reservoir by vibration shot rushed into a groove closed after reinforcement effect of anti-seepage diaphragm wall are simulated,and respectively analyzed the cut-off,the nature of the reservoir,the dam body and foundation soil,the seepage.(3)The research results show that the construction quality of the impervious wall is the most influential factor to the seepage prevention and reinforcement works,and the factors which are caused by the construction quality are the seepage coefficient of the cutoff wall.And the cutoff wall is not the main factor,such as the distance from the dam axis,the width of the cutoff wall,the depth of the buried depth of the impervious wall and the variation of the reservoir water level.In Gubei reservoir seepage reinforcement engineering as an example,analysis of the impact of the dam and dam foundation seepage of the factors,and the surrounding dam seepage monitoring,for China's dangerous reservoir reinforcement project to provide the certain basis.