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Chongqing Jiaotong University (重庆交通大学) 2021

Disease Mechanism and Control Technology of Subgrade of Operating Highway in Semi-dry and Cold Area

付玉

Titre : Disease Mechanism and Control Technology of Subgrade of Operating Highway in Semi-dry and Cold Area

Auteur : 付玉

Grade : Master 2021

Université : Chongqing Jiaotong University (重庆交通大学)

Résumé partiel
In the semi-arid regions of my country,affected by external environmental factors such as low rainfall and mostly concentrated in summer,freeze-thaw cycles and human engineering activities,various serious diseases have appeared during the long-term operation of the highway,which affects driving safety.And comfort.In view of the characteristics of diseases in semi-arid cold regions,it is necessary to analyze the disease mechanism and study control measures to ensure the long-term safe operation of highways.The thesis is based on the national key research and development project "Research on the instability mechanism of typical geological disasters in the red bed area and new prevention methods and technologies",based on the "Special treatment project for pavement subsidence of an operating highway in Ordos",in the preliminary data collection and on-site survey work Based on this,a series of theoretical and numerical studies have been carried out : using the anti-liquefaction shear stress method and the standard method to analyze whether there is vibration liquefaction in the area ;based on the layered sum method to calculate the effect of vehicle load and groundwater level changes on the roadbed settlement According to the theoretical calculation results,the FLAC3D software is used to establish a three-dimensional numerical model to simulate and study the influence of different causes on the subgrade displacement ;based on the theoretical calculation and numerical simulation results,the mechanism of subgrade diseases in the semi-arid cold area is analyzed,and the economics are proposed accordingly.Effective treatment plan : A three-dimensional numerical model is used to simulate the treatment plan’s control effect on subgrade settlement,and effective control measures are proposed based on the simulation results

Mots clés : semi-dry and cold area ;operating highway ;disease mechanism ;numerical simulation ;control technology ;

Présentation (CNKI)

Page publiée le 16 mars 2022