Analysis Of Time Effect On The Deformation And Stability Of High Fill Embankment

High fill embankment often appears in highway construction of the mountainous area in China, often there embankment settlement deformation, embankment instability diseases and other projects after put into operation, seriously affect the construction of the highway traffic efficiency and effectiveness. In this paper, based on engineering data, using a combination of laboratory experiments, numerical simulation, theoretical analysis, According to other aspects research of packing parameter timeliness test, embankment deformation evolution, embankment steady state changes, we made the following research:(1) Experimental study on physical and mechanical parameters of aging filler high embankment. With G320 K1045 + 230 national highway in high embankment road filler for indoor test subjects, compared to measured changes in the initial state and the different periods of physical and mechanical parameters, derived filler deformation index and shear strength index over time over, showed non-linear growth trend. Embankment filler moisture content and porosity ratio are non-linear negative correlation, the shear strength parameters increases over time; the influence of cohesion on the timeliness of the internal friction angle is more sensitive than the conclusion.(2) Embankment filling parameters change over time impact analysis on deformation of high embankment. According to laboratory test measurement data, finite element simulation analysis. Discover the laws change over time under the influence of parameters embankment filling: vertical deformation contours cross section along the embankment was "bowl-shaped"; horizontal deformation concentrated on both sides, the maximum lateral displacement of the embankment near the embankment in the lower 1/4 to 1 / 3 height.(3) The special nature analysis of physical and mechanical parameters change over time and deformation effects. Based on finite element analysis, physical and mechanical parameters of the filler univariate analysis, Found in packing compaction during deformation, deformation modulus change over time significant impact on the vertical deformation effect. Lateral deformation of filler shear strength(cohesion and internal friction angle) of the embankment will significantly change over time, Moisture content of the filler has a double impact on the embankment deformation effect, in the construction process, should control the impact of moisture on the embankment deformation.(4) Analysis of the influence of embankment filling parameters of aging changes on the stability of high embankment. Combined with laboratory test data for high embankment stability analysis and study, get a safety factor of embankment nonlinear time-varying growth conclusions, the aging changes in the moisture content of the filler can significantly improve the safety factor of the embankment, the cohesion and internal friction angle can significantly improve the embankment critical slip surface shape and position, Modulus of Deformation Aging variation is not obvious to improve the effect of the embankment stability.