东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (8): 1202-1205.DOI: -

• 资源与土木工程 • 上一篇    下一篇

季节性冻土地区高铁路基沉降研究

张爽1，唐春安2，张向东3   

  1. (1.东北大学资源与土木工程学院，辽宁沈阳110819；2.大连理工大学岩石破裂与失稳研究中心，辽宁大连116024；3.辽宁工程技术大学土木与交通学院，辽宁阜新123000)
  • 收稿日期:2012-11-12 修回日期:2012-11-12 出版日期:2013-08-15 发布日期:2013-03-22
  • 通讯作者: 张爽
  • 作者简介:张爽(1985-)，女，辽宁锦州人，东北大学博士研究生；唐春安(1958-)，男，湖南黔阳人，大连理工大学教授，博士生导师；张向东(1962-)，男，辽宁工程技术大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51174039).

Subgrade Settlement of HighSpeed Railway in Seasonal Frozen Soil Area

ZHANG Shuang1， TANG Chunan2， ZHANG Xiangdong3   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Center for Rock Instability and Seismicity Research， Dalian University of Technology， Dalian 116024， China; 3. Institute of Civil Engineering and Transportation， Liaoning Technical University， Fuxin， 123000， China.
  • Received:2012-11-12 Revised:2012-11-12 Online:2013-08-15 Published:2013-03-22
  • Contact: ZHANG Shuang
  • About author:-
  • Supported by:
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摘要： 以哈大高铁苏家屯段为研究对象，利用有限元软件ADINA对其进行三维模拟，结果表明，未经CFG桩处理的高铁路基沉降值不符合规范要求.通过改变CFG桩参数(褥垫层模量、褥垫层厚度、桩径、桩间距、桩长)，利用有限元软件进行多次二维模拟，得到各参数与路基沉降的关系.最后将CFG桩的参数进行组合，模拟出路基在CFG桩各参数组合条件下的路基沉降值.模拟结果表明，当褥垫层厚度为350mm，褥垫层变形模量为120MPa，桩间距为2m，桩径为05m，桩长为95m时，路基沉降量最小.

关键词: 高铁路基, 季节性冻土, CFG桩复合地基, 有限元, 沉降值

Abstract: Subgrade settlement at the Sujiatun section of Hada highspeed railway was simulated using the finite element software ADINA， and it was concluded that the subgrade settlement did not meet the specification if the CFG (cement flyash grave) piles were not applied to subgrade. By changing the parameters of CFG piles， including cushion modulus， cushion thickness， the diameter and length of piles， and spacing of piles， the relationship between the parameters and subgrade settlement was investigated， with the settlement values obtained on conditions of different parameter combinations. The result shows that the subsidence value is minimal when the cushion thickness is 350mm， cushion modulus is 120MPa， pile spacing is 2m， and the diameter and length of the pile are 05m and 95m， respectively.

Key words: highspeed railway, seasonal frozen soil, CFG pile composite subgrade, finite element, settlement value

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