Numerical Stimulating Study On Effect Of Low Embankment Expressway Subgrade Under The Traffic Load

Aiming at the fact that before diffusing to the embankment the traffic load had passed down on the soft subgrade, through stimulating traffic load, building roadbed model and developing numerical calculating, this article studied the dynamical response of low embankment expressway under the traffic load. In order to testify the research result, locale experimentation was launched, and checked out the result of calculating with the real measure result. A piece of advice about designing of expressway low embankment for the future was provided. The mean business was as follows:(1)A describing method about low embankment fitting low embankment expressway was put forwards by studying in theory about traffic load, namely analyzing the characteristic of the traffic load and describing method.(2)A coupling dynamical model fitting low embankment expressway was put forwards by analyzing in theory the rule of the dynamical response of low embankment expressway under the traffic load. This model could well simulate traffic load diffusing from pavement roadbed, consider the effect of transverse transfer.(3)A method that selected the reasonable calculating parameter was confirmed by analyzing method of different model parameter selecting under different condition according to the characteristic of the traffic load.(4)Numerical analysis about low embankment foundation response under traffic load was developed. Namely, transformation rule about dynamical stress and response under different depth of low embankment expressway on the action of traffic load was gained by studying foundation response under all kinds of situation such as different height, different load, and different rigidity of base of pavement.(5)For testing dependability of the model, locale experimentation was launched, and the result of locale experimentation was contrasted with that of numerical calculate, and analyzed the reason of error in detail.(6)According to the production of locale experimentation and numerical calculating, effective method of debasing the height of embankment was put forwards by studying the influence of the height of embankment.