山区超高加筋土路基力学行为的有限元分析

doi:10.3969/j.issn.1001-5485.2014.03.017

长江科学院院报 ›› 2014, Vol. 31 ›› Issue (3): 101-105.DOI: 10.3969/j.issn.1001-5485.2014.03.017

山区超高加筋土路基力学行为的有限元分析

任非凡^{1a, 1b, 2}, 徐超^{1a, 1b}, 许强², 王冠³

1.同济大学 a.岩土及地下工程教育部重点实验室;b.地下建筑与工程系, 上海 200092;
2.成都理工大学
地质灾害防治与地质环境保护国家重点实验室, 成都 610059;
3.上海理工大学环境与建筑学院, 上海 200093

收稿日期:2014-03-07 修回日期:2014-03-07 出版日期:2014-03-07 发布日期:2014-03-07
作者简介:任非凡(1980-), 男, 山西芮城人, 讲师, 博士, 主要从事岩土锚固与加筋土结构研究, (电话)13816589810(电子信箱)feifan_ren@tongji.edu.cn。
基金资助:
国家自然科学基金资助项目(41302221, 41001331);高等学校博士学科点专项科研基金(20120072120033);地质灾害防治与地质环境保护国家重点实验室开放基金资助项目(SKLGP2012K017) ;湖北省交通科学研究计划项目(2011700342)

Finite Element Analysis on the Mechanics Behavior of Super-high Reinforced Earth Embankment in Mountainous Areas

REN Fei-fan ^{1, 2, 3}, XU Chao^{1, 2}, XU Qiang³, WANG Guan⁴

1.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji Unverisity, Shanghai 200092, China; 2.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China;4.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2014-03-07 Revised:2014-03-07 Online:2014-03-07 Published:2014-03-07

摘要/Abstract

摘要： 以十堰至房县高速公路为例, 采用弹塑性有限元程序, 对山区某超高加筋土路基修筑过程中的双向位移、土压力、剪应力以及加筋体轴力与位移分布等力学行为进行数值分析。研究结果表明:① 加筋体内及加筋体后填土内侧向土压力不大, 垂直土压力主要为填土自重应力;② 加筋土路基底部混凝土圬工挡墙承受较大的侧向压力, 墙趾承受较大的压力与剪应力, 应保证基础平台的稳定性;③ 加筋体最大拉力出现在路基底部, 墙面最大水平位移出现在路基中部, 底部格栅后端承受一定的压应力, 可通过对混凝土圬工挡墙后的填土进行压实控制。研究成果可为山区超高加筋土路基设计方案提供参考, 同时对其他类似工程的数值分析具有一定的理论借鉴意义。

关键词: 十房高速公路, 超高加筋土路基, 混凝土圬工挡墙, 弹塑性有限元

Abstract: The bi-directional displacements, earth pressure, shear stress, geogrids’ axial stress distribution and displacement distribution of a mountainous super-high reinforced embankment were systematically analysed using an elastic-plastic finite element program. The highway from Shiyan to Fangxian was taken as a case study. Results showed that: (1) The lateral earth pressure in geogrids and fills was small, and the vertical earth pressure mainly came from the gravity stress of the fill. (2) The lateral pressure in the concrete masonry retaining wall was large, and the toe of wall bore large pressure and shear stress, so the stability of the foundation should be guaranteed. (3) The maximum tension of the geogrid lied on the bottom of the embankment; the maximum horizontal displacement of the wall face was located on the middle of the embankment. Compressive stress was found at the bottom of the geogrid back-end, which can be decreased by controlling the fill compaction quality. These research results provide references for the design of super-high reinforced embankment in mountainous area, and is of theoretical significance for other similar works.

Key words: Shiyan-Fangxian highway, super-high reinforced embankment, concrete masonry retaining wall, elastic-plastic finite element

中图分类号:

TU44

任非凡, 徐超, 许强, 王冠. 山区超高加筋土路基力学行为的有限元分析[J]. 长江科学院院报, 2014, 31(3): 101-105.

REN Fei-fan , XU Chao, XU Qiang, WANG Guan. Finite Element Analysis on the Mechanics Behavior of Super-high Reinforced Earth Embankment in Mountainous Areas[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2014, 31(3): 101-105.

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山区超高加筋土路基力学行为的有限元分析

Finite Element Analysis on the Mechanics Behavior of Super-high Reinforced Earth Embankment in Mountainous Areas

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