Study On The Settlement Regularity And Stability Of Tonghe Expressway's High Embankment

As China's vast territory,resulting in soil geology,topography and natural climatic conditions are quite different,especially in southwest Yunnan,Guizhou,Sichuan mountainous terrain,high embankment road construction has become a general and important form of embankment structures.High embankment relative to the general structure,has a final settlement for a long time,a large amount of the settlement.All aspects of the bearing capacity of the foundation and the foundation filling material require high standard.Roadbed stability of high embankment road's safety operations as an important technical indicators,although the analysis of the ways now has high filling roadbed stability,for example,rigid limit equilibrium method and finite element methods such as shear strength reduction but any kind of stability analysis methods have limitations and specific,used in the actual project ignored many natural factors,human factors and technical factors,not fully reflect the true stability and high embankment settlement characteristics.Around this problem,this article exponential,hyperbolic curve fitting and Pierre introduced to traditional roadbed stability analysis method,first the statistics of Chongqing Hechuan to Tongliang highway K4 + 730 ~ K4 + 830 and K12 + 950 ~ K13 + 140 high fill subgrade settlement data,analysis,and ultimately result in a high embankment road embankment settlement curve to arrive at the pros and cons of various methods of curve fitting.However,due to curve fitting analysis does not fully reflect the actual situation of the settlement,it is difficult to meet the requirements of the actual settlement high embankment various stages of deformation stability monitoring and control,and monitoring evaluation the stability of the high embankment.Based on the analysis curve fitting model,the high embankment under different conditions,using finite element analysis software ABAQUS under high embankment under the conditions,such as high embankment filling different heights,different materials and different filling,then the study of high embankment under common feature of embankment settlement and the settlement produced factors result in the the deformation characteristics of settlement and displacement under conditions different filling height,filling different materials and different compaction strength.Finally,according to the results of numerical simulation ABAQUS settlement under different conditions,combined with the actual project,making a more excellent construction plan above developing the economy in the construction technology,construction efficiency and other aspects.Data and conclusions of this paper play a important role in the understanding of the relationship between embankment slope deformation and stability,the actual use of roadbed deformation monitoring datas are to determine the safety of the embankment.Not only can be forecast for high embankment stability,but also have some practical value and theoretical significance in actual projects.