盐渍化砂土路基沉降规律数值分析

Numerical Analysis of Subgrade Settlement Regularity of Sandy Soil Salinization

科学、合理的预测路基工后沉降是确保铁路长期安全运行的基础,通过对青海北霍布逊盐湖区地方铁路含盐砂土路基实测沉降数据的分析探究,提出符合本地区运营条件的沉降预测模型,对数值模拟结果与实测数据进行比对,推算出不同模型下的最终沉降量.结果表明:用指数函数模型可以较好的拟合本地区盐土路基沉降规律,这一结论有利于进一步研究盐湖区铁路砂土路基沉降问题.

Scientific and rational prediction of post-construction settlement is the basis of ensuring the long-term operation of the railway,so the model for subgrade settlement prediction is presented by analyzing the field observation data of saline soil subgrade in North Hob Johnson Lakes region in Qinghai Province.The final settlement under different models is calculated by the comparison of field observation data and prediction data.The analysis results show that the exponential function could better fit the subgrade settlement regularity in this area,and it will be helpful to study the settlement of saline soil subgrade.