Snowmelt Seepage Effect Of Seasonal Frozen Soil Slope Stability Analysis

Our country is humongous with a large country.The terrain ups and downs of our country is all kinds of landform characteristics.In many terrain features,seasonal frozen earth also occupied a vast area.Seasonal frozen soil area is very broad in our country.This area is very extensive.Permafrost and seasonal frozen soil in our country's land area has a larger proportion,the permafrost to lower temperature requirement,it occupies about twenty-two percent of China's land area.But the seasonal frozen soil temperature requirements in a relatively broad range,regional most satisfy the temperature condition in our country,the distribution of seasonal frozen soil in our country have a wider.China's vast land area across the tropical and temperate zone and frigid zone these climatic zone,and temperate across a wider range of seasonal frozen soil are more likely to appear in temperate regions,it occupies about fifty-two percent of China's land area.Therefore,studying the characteristics of seasonal frozen soil is a very meaningful work.Papers in Shenke highway K7 + 925 ~ K55 + 450 part of the seasonal frozen soil slope as the backing,the test of the soil of seasonal frozen soil in this section is the basic parameters.And then through limited soft software ABAQUS to simulate the seasonal changes in the process of high slope in snow melting permafrost seepage process,to analyze the stability of Duan Bianpo rule.the process of melting snow is the most unstable phase slope freeze-thaw stage,seepage stage times,surface melting snow on the slope stability.The lower the temperature,frost heave phenomenon more obvious,and the more unstable slope.High water content of soil,slope in the process of freezing and thawing,the more unstable.Environment temperature also will be very obvious influence on the seasonal frozen soil slope stability.Along with the environment temperature reduced,the slope of surface water and groundwater began to appear obvious phenomenon of frost heave,the stability of the slope began to reduce,when the temperature drops,the more severe,the change of the slope of the maximum shear stress is not obvious,and then influence becomes smaller and smaller.Gradually increased with the increase of temperature,the stability of frozen soil,when the temperature increased to a certain extent,permafrost is melting,the frozen soil cohesion and within the every Angle became smaller,the slope stability and began to decrease.In the process of snow melt,the shallow layer of the slope begins to increase after theinfiltration of water,and the stability is reduced,which is easy to destroy first.The order of damage is from the slope to the slope and then to the slope top.Therefore,in the event of snow melt seepage phenomenon,the most should be to strengthen the protection of the location of the slope toe,while the slope should also strengthen the waterproof measures,the slope should pay attention to the drainage facilities.