Study On Failure Mode And Bearing Capacity Of Highway Embankment Foundation In Loess Region

Along with development of road enterprise, there are more and more high fills in high-grade highways of loess area. The appearance of high fills causes more and more people to realize the importance of ground.This paper uses the large-scale finite element software ANSYS to establish the mechanics mode of ground as well as the embankment. Through analyzing the relation of ground destruction pattern and physics mechanics parameter of ground, this paper proposes the possibly destruction of ground under each geological condition.The coupled analysis of seepage and stress shows that the effect of infiltration of ground water accelerates the destruction of ground , After analyzing the relationship between the ground and the destruction of pavement, this paper points out that the main reason of pavement damage is that the ground occurs the new displacement after the infiltration of rain.Basing on table settlement of the existing road standards, this paper uses the finite element method for simulation of the actual filling layered embankment. Using gravity factor to obtain the total settlement of foundation of the road surface and a corresponding central embankment .Analyzing the data obtained from the experiment to identify the corresponding relationship between the ground surface subsidence and between the surfaces of the uneven settlement.This paper uses the finite element method to fill the simulation of the foundation load tests through the load displacement curve. With the road standards and the settlement table combining research and the road surface subsidence of the relationship between the settlement tables to identify ground capacity, According to data obtained from the regression test to determine the capacity of the highway embankment foundation formula. On this basis, analyzing the load bearing capacity of foundation embankment situ load testing and the relationship between the bearing capacity of foundations.Based on the foregoing analysis of the conclusions, the paper concludes with some recommendations highway filling foundation design.