[1]刘朝晖,王鑫.桩承式低填路堤土拱效应的数值模拟[J].深圳大学学报理工版,2014,31(5):529-536.[doi:10.3724/SP.J.1249.2014.05529]
　Liu Zhaohui and Wang Xin.Numerical simulation on soil arching effect of piled low embankment[J].Journal of Shenzhen University Science and Engineering,2014,31(5):529-536.[doi:10.3724/SP.J.1249.2014.05529]
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桩承式低填路堤土拱效应的数值模拟()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第31卷
期数:
2014年第5期
页码:
529-536
栏目:
土木建筑工程
出版日期:
2014-09-20

文章信息/Info

Title:
Numerical simulation on soil arching effect of piled low embankment
文章编号:
201405013
作者:
刘朝晖1; 王鑫2
1）湖北科技学院资源环境科学与工程学院，湖北咸宁 437000
2）武汉大学土木建筑工程学院，武汉 430072
Author(s):
Liu Zhaohui1 and Wang Xin2
1) College of Resources and Environment Science and Engineering, Hubei University of Science and Technology, Xianning 437000, Hubei Province, P.R.China
2) School of Civil Engineering, Wuhan University, Wuhan 430072, P. R. China
关键词:
路基工程; 低填路堤; 土拱效应; 填土高度; 桩土应力比; 扩大头直径
Keywords:
subgrade engineering;  low embankment;  soil arching effect;  fill height;  pile-soil stress ratio;  pile head diameter
分类号:
TU 472.3
DOI:
10.3724/SP.J.1249.2014.05529
文献标志码:
A
摘要:
利用数值模拟试验研究低填路堤下土拱效应的特性. 通过建立三维土拱模型，研究影响土拱效应的主要参数——桩布置形式、桩间距、填土高度和扩大头直径间的相互关系. 结果表明，无论是三角形还是正方形布置形式，钉形桩的应力分布具有显著的空间对称性；在布置形式、填土高度和桩间距等参数一定的条件下，随着钉形桩扩大头直径的增加，土拱效应发挥程度降低，当扩大头较大，相邻两桩桩边缘较近时，群桩的挤土作用较明显；在正方形桩体布置形式下，填土路堤中应力分布较均匀，挤土作用下的土拱形态对称性比三角形布置形态要好，但桩土应力比却并不一定比三角形的大. 在设计中需要综合考虑填土高度、扩大头直径以及桩的布置形式等因素.
Abstract:
To study the characteristics of soil arching effect on piled low embankment, a three dimensional soil arch model is conducted to analyze the key parameters influencing soil arching. The results show that pile stress distribution of T-shape column has the characteristics of significant spatial symmetry. For a given condition of pile configuration, soil filling depth and pile spacing, the soil arching effect becomes less moblized as the diameter of pile head of Nail-shape pile increases; whereas if the pile head diameter is large and the adjacent piles are close, the squeezing effect of pile group becomes more significant. Under the arrangement of the square piles, the distribution of stress in the embankment is uniform. The symmetry of soil arching form under soil compaction effect is better than the one of triangle layout, but the pile-soil stress ratio is not necessarily larger than that of the triangle layout. Therefore, it is necessary to comprehensively consider the filling height, the pile head diameter and layout form.

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备注/Memo

备注/Memo:
Received：2014-05-04；Accepted：2014-07-24
Foundation：Natural Science Foundation of Hubei Province(2012FFC01401)
Corresponding author：Lecturer Liu Zhaohui. E-mail: gsesa@sina.com
Citation：Liu Zhaohui, Wang Xin. Numerical simulation on soil arching effect of piled low embankment［J］. Journal of Shenzhen University Science and Engineering, 2014, 31(5): 529-536.（in Chinese）
基金项目：湖北省自然科学基金资助项目（ 2012FFC01401）
作者简介：刘朝晖（1975—），男（汉族），湖北省咸宁市人，湖北科技学院讲师. E-mail: gsesa@sina.com
引文：刘朝晖，王鑫.桩承式低填路堤土拱效应的数值模拟［J］. 深圳大学学报理工版，2014，31（5）：529-536.
更新日期/Last Update: 2014-09-11