Numerical Analysis of Bearing Deformation of Embankment for Trench Excavation Replacement and Soft Foundation Reconstruction and Expansion
In view of traditional replacement and in-situ solidification of foundation treatment methods have shortcom-ings such as large engineering volume and poor economic efficiency.This paper proposes the use of trenching and replacement to treat soft soil foundations in highway renovation and expansion projects.Based on the actu-al renovation and expansion project of a certain highway,a numerical analysis method that can better reflect the characteristics of trenching and replacement foundation treatment was established and verified.The work-ing mechanism and failure mode of the trenching and replacement foundation treatment method were re-vealed,and the concept of replacement ratio was introduced,analyzed the influence of replacement ratio and replacement materials on the load-bearing deformation characteristics of reconstructed and expanded embank-ments.Research has shown that excavation and replacement can significantly improve the bearing capacity of embankments and slope stability,with good economic benefits;The ultimate bearing capacity of the embank-ment decreases with the increase of replacement ratio,and increases with the increase of lime content.As the replacement ratio increases,the stability coefficient of the embankment slope gradually decreases,and at high replacement ratios,the increase in lime content has little effect on the improvement of the safety coeffi-cient of the slope.
reconstruction and expansion of embankmentstrenching and replacementcarrying capacityslope stabili-tysoft foundation
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