摘要
牡绥铁路扩能改造工程项目地处黑龙江省,为高寒地区。通过在路基试验段采用现场试验、数值模拟分析、数据监测等方法,探讨分析疏排下渗等方法对减轻路基冻胀病害的效果。研究表明,在设置渗水盲沟的情况下,盲沟附近压力水头较高,渗流流速加快,周围水体向盲沟处聚集并排出;与未设置渗水盲沟断面相比,有效减少轨道下部路基本体含水量,减少水分在路基本体的滞留时间,降低冻胀可能。经过多个冬季的现场监测与结果分析,最大冻胀量与平均冻胀量均有所下降。
This paper takes the expansion and reconstruction project of the Mudanjiang-Suifenhe Railway as the background.The project is located in Heilongjiang Province,which is a alpine area.Through field test,numerical simulation analysis,data monitoring and other methods in the subgrade test section,the paper discussed and analyzed the effect of drainage and infiltration on reducing frost heave disease of subgrade.The research shows that under the condition of setting seepage blind ditch,the pressure head near the blind ditch is higher,the seepage velocity is faster,and the surrounding water body gathers and discharges to the blind ditch.Compared with the section without seepage blind ditch,the water content reduction of the basic body of the lower part of the track is effectively dropped,the retention time of the water in the subgrade body is shortened,and the possibility of frost heave is reduced.After several winter field monitoring and result analysis,the maximum frost heave and the average frost heave are decreased.
作者
刘雪冬
LIU Xuedong(Harbin Railway Construction Group Co.Ltd.,of China Railway 22nd Bureau Group Co.Ltd.,Harbin Heilongjiang 150000,China)
出处
《铁道建筑技术》
2020年第8期42-46,共5页
Railway Construction Technology
基金
中铁二十二局集团有限公司科技研究开发计划项目(16-07A)。
关键词
路基
冻胀
渗水盲沟
数值模拟
试验
subgrade
frost heave
water seepage blind ditch
numerical simulation
test
