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李星,邓凯丰,舒中文. 疏干排水孔在大准铁路路基冻害整治中的关键技术[J]. 科学技术与工程, 2020, 20(24): 10025-10031.
LI Xing,DENG Kai-feng,SHU Zhong-wen.Study on Key Control Techniques of Dewatering Drainhole used in Treatment of roadbed freezing damage in Datong-Zhungeer Railway[J].Science Technology and Engineering,2020,20(24):10025-10031.
疏干排水孔在大准铁路路基冻害整治中的关键技术
Study on Key Control Techniques of Dewatering Drainhole used in Treatment of roadbed freezing damage in Datong-Zhungeer Railway
投稿时间:2020-02-15  修订日期:2020-06-04
DOI:
中文关键词:  铁路路基  疏干排水孔  数值分析  排水效果  参数  优化
英文关键词:railway subgrade  dewatering drainhole  numerical simulation  drainage effect  parameter  optimization
基金项目:(41530639,41877226)、国家重点研发计划项目(2017YFC1501000)、中国神华准能集团科研项目(SHGF-13-46、SHZN-17-41)资助
        
作者单位
李星 中铁科学研究院有限公司
邓凯丰 西南交通大学
舒中文 中铁科学研究院有限公司
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中文摘要:
      以疏干排水孔治理大准铁路K136+600~K136+938冻害段路基为工程背景,借助有限元软件针对排水孔间距、孔径、角度、长度等因素对路基内部含水率影响效果进行分析研究。研究结果表明:(1)根据铁路路基实际尺寸合理选择排水孔间距,一般间距宜取1.0m;(2)排水孔孔径取0.1~0.2m时排水效果最好;(3)排水孔的倾斜角一般可设为3~6°;(4)排水孔的长度宜沿横向贯穿路基,布置时两侧错开布置,孔长为路基宽度一半;(5)对于大准铁路,排水孔宜设置在路基面以下1.5m。该研究成果可为疏干排水孔治理既有铁路路基冻害工程设计提供理论依据。
英文摘要:
      In this paper,the freezing damage roadbed at K136+600~K136+938 of Da Zhun was taken as an engineering example,which was treated by the dewatering drainhole. With the aid of the finite element software, the drainage effect which could be affected by the spacing, aperture, angle, length of the dewatering drainhole were studied by numerical simulation methods. Result indicated that: (1)The spacing should be selected by size of subgrade, the spacing can be taken as 1.0m.(2)When the aperture is taken as 0.1m~0.2m, the drainage effect is the best.(3)The angle can be usually taken as 3°~6°.(4)The length should cross the roadbed in the transverse direction, the drainhole should be staggered on both sides of the roadbed, and the length can be taken as the half of the subgrade width.(5)For this railway, the drainage hole should be set 1.5m below the subgrade surface. The research results provide theoretical guidance for the design of dewatering drainhole in existing railway subgrade freezing damage.
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