Reinforcement And Settlement Analysis Of Soft Ground Subgrade

Soft ground is a common bad geological type in engineering geology.It is necessary to reinforce the soft ground in practical engineering to prevent its excessive settlement and even shear failure.With the increasing mileage of Expressway in the country,the problem of soft ground encountered during the construction of expressway is increasing.Due to various soft ground geology and different load conditions in engineering geology,the reinforcement of soft ground subgrade and the settlement monitoring are unique,and the reliable reinforcement work is related to the safety and stability of the highway driving,which is the key problem that people need to solve in the construction of the expressway.Based on the research background of soft ground subgrade reinforcement in the K426+291 ~ K426+714 of a high speed way,the paper discusses the deformation of soft ground under the load of soft ground under the load of soft ground,and derives the Biot model and the creep consolidation model of soft ground.In the ABAQUS finite element method,the horizontal and two-way reinforcement treatment model of soft ground subgrade is established,and the results of the settlement and stress distribution of two different reinforcement measures under three working conditions are compared with those of the unreinforced subgrade.Then,with the completion of the subgrade reinforcement project,the stability of subgrade and the effectiveness of the reinforcement are evaluated by the comparison and evaluation of the continuousobservation value of subgrade settlement with the numerical solution of the finite simulation and the prediction of the time history of subgrade settlement in a year.It is found that the horizontal reinforcement measures of the geogrid as the soft ground foundation should be reinforced with the vertical reinforcement measures in the form of concrete piles to resist the settlement deformation of the soft ground subgrade.The treatment scheme of soft ground subgrade with two-way reinforcement measures can effectively use the material properties of grille and concrete pile.The application of two-way reinforcement in double layer soft ground can not only save cost,but also meet the requirements of the control of settlement and settlement development of soft ground subgrade.The prediction value of neural network time history and the finite element theory of soft ground subgrade settlement meet the precision requirements of practical engineering application.In practical engineering,the corresponding settlement analysis method can be selected according to the needs of soft ground subgrade settlement analysis.