The Numerical Simulation That Environmental Temperature And Humidity Affect The Stability Of The Lime Treatment Expansive Soil Embankment Slope

The research on highway embankment of treated expansive soil body property going through several wet-dry cycles, takes the important significance for evaluation on soil stability. This thesis affect the function coming to study lime stabilized expansive soil road embankment long-term stability by the fact that the local inside's temperature field and moisture field changing and effected to soil, building a heat and moisture coupled model, use finite difference software FLAC to carry out analysis on lime stabilized expansive soil embankment long-term stability. Rationality having verified whose thermodynamics and the instauration transfusion model used interior model experiment result, whose inside temperature studies under concentrating on punishing the expansive soil embankment side slope to lime in sticky environment as well as humidity field distribution condition has been in progress. Migration going down river system in the temperature circulation is slower because stabilized soil self's closely knit degree is comparatively tall, the permeability coefficient that formula reaches according to experience is also comparatively less, moisture is comparatively big soil outside's, and the evaporation capacity is also limited.Affecting the temperature conduction factor in conduction of heat equation is a soil conduction of heat modulus, the factor affecting the soil body conduction of heat module's has many, it includes soil granular grading, chemical composition, maximum dry density , soil moisture etc. The soil of embankment slope can be seen as a homogeneous soil, and its particle composition, certain chemical composition, dry bulk density and porosity of the soil has not before extensive damage can also be seen as a fixed value, the only impact on soil thermal conductivity of the factors for the water content. Changes in water temperature on the transfer although not directly affected by coupling demonstrated by the equation, but in this paper, the model can be FLAC software temperature conductivity is set to saturation on the water content or form of a function can be achieved Temperature and Humidity coupling.In the indoor model test, the depth of impact on slope soil body temperature and humidity by the environment is about 2m, temperature changes relatively largely in range of 0.5m under the soil body surface. The temperature of the domatic position of slope and soil body changes more largely than slope carrying and slope angle place. Because the heat conduction coefficient of the soil body is relatively small, the lagging effect of temperature is more obvious with the increase of soil body depth.According to test result of intensity of three axles with dry-wet circulation, the intensity of treated expansive soil by lime decays with times increasing dry-wet circulation, especially the intensity of soil after dry-wet circulation and finally saturated decays more obvious. FLAC software on the use of three lime treatment expansive soil embankment slope model in the condition of three of the stability, the results showed that environmental factors caused the soil dry and wet cycles on soil strength and long-term stability of the slope is very Obviously, the decision of the embankment slope of the long-term stability.