夯实高速铁路路基生命力的基础-地基处理

本文归纳总结了高速铁路路基建设中,软土、松软土与软土互层、湿陷性黄土、膨胀土、膨胀岩、岩溶等重点地基处理问题的经验教训和技术成果,对斜坡软土、膨胀岩土等地基的纵横向不均匀沉降和横向位移问题,对非饱和土地基吸水增湿效应引发的二次沉降变形问题,对站场路基与区间路基在受力、沉降方面的差异问题等进行了梳理。简析了问题产生的原因及其对路基生命力的影响,并提出了相关思考和建议,希冀有助于夯实路基基础,提高路基的生命力。

Foundation of High-speed Railway Subgrade Vitality-Ground Treatment

The paper summarizes the lessons and technical achievements of the ground treatment in the geological conditions such as soft soil,interbedding of loose soft soil and soft soil,collapsible loess,expansive soil,expansive rock and karst in the construction of high-speed railway subgrade,and sorts out the vertical and horizontal uneven settlement problems and the horizontal displacement problems of the slope soft soil ground and expansive rock and soil ground,the secondary settlement deformation problems caused by the water absorption and humidification effect of unsaturated soil foundation,and the differences in stress and settlement between station subgrade and sectional subgrade.It analyzes the causes of the problems and their influence on the vitality of the subgrade,and puts forward the relevant ideas and suggestions,hoping to help consolidate the subgrade foundation and improve the vitality of the subgrade.