Analysis On Damage Reason And Treatment For High Fill Embankment

In recent years, because of the influence of the global geological movement and extremeclimate conditions, the occurrence of landslides and the slope destruction caused greatcasualties and property losses. According to Ji-Shao expressway K280engineering, the authorcompared the safety factor of slope and the slip surface position by different methods.Next,the author made a summary about the treatment of some laws. Main job as follows:First of all, the author analysis causes of slope instability and landslide deformationdevelopment present situation of K280section of Ji-Shao expressway by the stability oflandslide area of engineering investigation, monitoring, theoretical calculation and finiteelement analysis method.Next,the author compare the similarities and differences among theresults in various method analysis process and the conclusion, analysis the reason andcompare the advantages and disadvantages of various methods. With landslide stability byengineering geological investigation work to collect data and the results, the damage reason ofJi-Shao expressway was determined. Because high slope itself was affected by precipitation,the shear strength value is reduced and the slope instability is low. Then lack of stability anduneven settlement happened in the roadbed and the highway junction produces sliding alongthe surface between the embankment and the original ground.Second, the influence of the slope height, side slope grade, soil shearing strength indexvalues for slope stability is described by the theoretical calculation.Then the influence of thedifferent definition of safety coefficient for the calculation of the landslide thrust is described.The author obtain the differences in results by contrasting various calculation methods andanalysis the reasons of differences as well as the factors that influence the calculationresult.The limit equilibrium method is adopted to Ji-Shao expressway calculation analysis toverify the conclusion of engineering survey and monitoring work. Further the result thatJi-Shao expressway of the sliding surface on the border between fill roadbed and in-situsurface and high slope stability of its shortcomings is validated by finite element analysis andcalculation.Finally,the author introduces the commonly used measures to deal with the landslideslope reinforce and evaluate emergency plan of Ji-Shao expressway. By theoreticalcalculation,the author made a summary that the influence of pile bending moment, shear forceand displacement value of pile head and the changing rule of the soil counterforce by changeanti-slide pile spacing and prestress anchor cable. Through the finite element calculation, theresults of theoretical calculation was further verified.Then the author compared the difference to the calculation results and analyzed the reasons.