摘要
研究目的:通过某客运专线未进行超载预压黏质黄土地基路基段在不同静置时间下,采用曲线拟合法预测路基工后沉降的变化规律。研究结论:通过曲线拟合法预测分析得出路基开挖或填筑完成后,一般静置4个月内沉降较大,4～6个月沉降趋势逐渐变缓,达到6个月后路基沉降趋于稳定。采用对数曲线与双曲线预测沉降精确度虽有差异,但可以采取2种曲线预测值平均的方法加以解决,也能够保证预测符合实际情况。
Research purposes：The change law of post-construction settlement of one passenger dedicated line＇s clay loess subgrade without pre-loading is predicted under different standing times with curve fitting method.Research conclusions：From the prediction analysis with curve fitting method it is concluded after excavation or filling of the subgrade,the subgrade settlement is large when the subgrade stands within 4 months,the subgrade settlement tends to slow down when the subgrade stands for 4-6 months and the subgrade settlement tends to stable when the subgrade stands for more than 6 months.Although there is the difference of settlement prediction between using logarithmic curve method and hyperbola method,but the difference can be solved by using the medium value of these two methods to ensure the prediction conforming to the real situation.
出处
《铁道工程学报》
EI
北大核心
2010年第8期47-51,55,共6页
Journal of Railway Engineering Society
关键词
客运专线
静置时间
沉降预测
工后沉降
影响
探讨
passenger dedicated line
standing times
settlement prediction
post-construction settlement
effect
discussion
