隔堤填筑路堤的稳定性及变形破坏模式分析

›› 2010, Vol. 31 ›› Issue (8): 2471-2478.

隔堤填筑路堤的稳定性及变形破坏模式分析

董云^{1, 2}，何卫忠¹，孙蔚³

1淮阴工学院建筑工程学院，江苏淮安 223001 8；2河海大学岩土工程研究所，南京 21009；3江苏淮安交通勘察设计研究院有限公司，江苏淮安 223001

收稿日期:2009-07-30 出版日期:2010-08-10 发布日期:2010-08-30
作者简介:董云，男，1974年生，博士研究生，副教授，主要从事道路工程、岩土工程的教学和科研工作。
基金资助:
淮安市科技计划项目（No. HAS06-013）；淮阴工学院青年教师科技基金项目（No. 351707071）。

Analysis of stability & deformation and destruction mode of road embankment built aside dam

DONG Yun^{1, 2} ，HE Wei-zhong¹， SUN Wei³

1 Faculty of Architecture and Civil Engineering of Huaiyin Institute of Technology, Huai’an, Jiangsu 223001,China; 2 Geotechnical Research Institute of Hohai University, Nanjing 210098,China; 3 Jiangsu Huai’an Communicationas Design & Reconnaissance Institute Co.Ltd. Huai’an, Jiangsu 223001,China

Received:2009-07-30 Online:2010-08-10 Published:2010-08-30

摘要/Abstract

摘要：

隔堤填筑路堤或沿原河堤加宽是高等级公路经常采用的改扩建方式，路堤填筑后对原河堤的稳定性将产生怎样的影响，路堤自身的稳定性及变形破坏具有何特征，是目前沿河公路扩建工程中亟需解决的问题。结合依托工程的现场勘察和室内外试验结果，建立有限元模型，对路堤填筑前后及不同水位渗流条件下原河堤及路堤的稳定性进行了模拟计算和分析。计算结果表明：路堤填筑有利于提高原河堤的稳定性，稳定安全系数可提高约26%；隔堤填筑的路堤受多因素共同作用，容易产生较大的差异沉降，且工后固结时间长、沉降量大，工后沉降达总沉降的35%左右；隔堤填筑的路堤一般仅在远离原河堤一侧边坡发生剪切失稳破坏，渗流对路堤稳定性的影响较小，且不会改变路堤的破坏模式。数值模拟计算可以在工程实施前揭示隔堤填筑路堤的稳定性及变形破坏模式，从而为后一步的工程对策设计提供依据和参考。

关键词: 路堤, 渗流, 稳定性, 变形, 破坏, 数值模拟

Abstract:

Fill road embankment aside riverbank or widen riverbank as road embankment is often used in highway extend. The road embankment along riverbank built has what influences to the stability of riverbank, and has what characteristics of the stability, deformation and destroy mode to the road embankment. These are the main problems to be solved in river levee highway extend. Based on the results of local reconnaissance and in-situ as well as laboratory test, a finite element model is built to carry out analogy calculation and analysis of the stability of the riverbank and the road embankment under different water level before and after the road embankment built. The results indicate that: the build of road embankment is propitious to enhance the stability of the riverbank, the safety factors are increased about 26%; the embankment built aside riverbank is easy to generate differential settlement and big settlement. The total settlement could increase 35% as the widen of embankment. the road embankment can occur whole shear destroy on the slope far from the dam, and the seepage has little influence to the stability and would not change the destroy mode of the embankment. Numerical simulation can disclose the stability and destroy mode of the road embankment before the project built. Simulation results could offer reference and gist for the next engineering countermeasure design.

Key words: road embankment, seepage, stability, deformation, destruction, numerical simulation

中图分类号:

TU413.6+2

董云，何卫忠，孙蔚. 隔堤填筑路堤的稳定性及变形破坏模式分析[J]. , 2010, 31(8): 2471-2478.

DONG Yun ，HE Wei-zhong， SUN Wei. Analysis of stability & deformation and destruction mode of road embankment built aside dam[J]. , 2010, 31(8): 2471-2478.

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