High Embankment Stability Studies

Build the superhighway in the loess area, because of loess special nature , complicated geology , geographical factor, the high road bed that filled out will appear unavoidably in a lot of highway sections , and the stability analysis of high embankment is one of the subject matters faced at present. High embankment stability analyse including embankment subside and slope steady two.This text passes the deformation of the debulk loess of indoor experimental study, intensity characteristic. Three axles are compressed and tested and can be drawn in the room which hits the real loess, with pressing the increase of solidity K, the cohesive force of the debulk loess increases a lot of, and the increase of the interior angle of friction is relatively small in range. Draw the pressure under different debulk degree (do the density ) with falling into the coefficient relation wetly through double-line law, hitting the real loess still has wet falling into nature in case of hitting really and insufficiently, as to highly greater than the high embankment above 15ming, its underpart pressure generally in above 200kPa, embankment at this moment might take place slope foot person who sink into disease still when corroding water.Because the side slope form and slope of the embankment above to 20m of the existing " road bed design specification of the highway " do not have clear regulation. This text foundation embankment fill out soil indoor result of the test, combine for loess high embankment soil nature parameter, balance analytic approach and play through limit plasticity finite element intensity roll over between subtraction and loess area slope by the high embankment in different soil parameters, slope type,, slope high, stability when the slope is it analyse , combine loess slope a large number of actual existence slope form by the high embankment to go on, on the basis of meeting stability demand, combine economy , put forward one suitable for loess to be high to fill reasonable, feasible section form of embankment.Construct and fill out the course of building with the high embankment of simulation loess of law of finite element, draw loess high embankment subside out of shape law and loess high influence factor that embankment subside include the heightof the embankment, fill out soil unit weight, fill out the mould amount of soil resilience , mould amount out of shape of soil of the ground ,etc. Close to the centre line of the embankment, subside the more greatly; Deviate from embankment centre line, subside light to subside along cross section direction curve take the form of basin promptly. The maximum of subsiding finally of the embankment happens on the embankment top . Fill out soil resilience increase , mould of quantity by soil out of shape mould amount with ground, embankment subside and not even to subside deduce thereupon, fill out soil resilience mould amount influence of quantity remarkable as ground soil out of shape mould. Loess high embankment oneself person who compress account for embankment always about 10% of subsiding etc., ignore.