| 公路桥涵台背回填稳定性极限分析上限解 |
| |
| 引用本文： | 葛折圣,葛折贵,黄晓明.公路桥涵台背回填稳定性极限分析上限解[J].岩土力学,2004,25(12):2007-2012. |
| |
| 作者姓名： | 葛折圣 葛折贵 黄晓明 |
| |
| 作者单位： | 1. 广州市市政园林局，广东 广州 510001；2.东南大学 交通学院，江苏 南京 210096；3.安徽省高等级公路工程监理有限公司，安徽 合肥 23001 |
| |
| 基金项目： | 西部交通建设科技项目(No.200231800032) |
| |
| 摘 要： | 运用塑性力学极限分析的上限定理，分析公路桥涵台背回填的稳定性问题。首先，由模型试验和数值分析结果确定回填区和地基的滑动模式；其次，根据位移协调条件建立滑动体的速度场，并计算各滑动楔块的位移速度；最后，运用虚功原理和优化算法寻找最不利滑动面位置，计算不同回填材料的土压力或临界填筑高度。研究发现：地基与回填材料的强度、性能以及加筋条件对台背回填稳定性的影响都非常显著。结果表明：增加地基与回填材料的强度，采用轻质回填材料，减小加筋间距和增加筋材强度，都有利于提高台背回填材料的稳定性。
|
| 关 键 词： | 台背回填 极限分析 上限解 速度场 能量平衡 |
| 文章编号： | 1000-7598-(2004)12-2007-06 |
| 收稿时间： | 2003-03-18 |
| 修稿时间： | 2003年3月18日 |
Highway-bridge abutment-backfill stability analysis based on plastic upper bound theorems |
| |
| GE Zhe-sheng,GE Zhe-gui ,HUANG Xiao-ming.Highway-bridge abutment-backfill stability analysis based on plastic upper bound theorems[J].Rock and Soil Mechanics,2004,25(12):2007-2012. |
| |
| Authors: | GE Zhe-sheng GE Zhe-gui HUANG Xiao-ming |
| |
| Institution: | 1. Guangzhou Municipal Landscape Bureau, Guangzhou, 510001, China; 2.College of Traffic and Transportation Engineering, Southeast University, Nanjing 210096, China; 3. Anhui Expressway Engineering Supervising Company, Hefei 230001,China |
| |
| Abstract: | This paper studied highway-bridge abutment-backfill stability by the upper bound theorems of plasticity. Firstly, slip model of groundsill and backfill was decided according to centrifuge test and numerical calculation results. Secondly, the velocity field was determined based on the conditions of kinematic admissibility. Finally, to seek the least upper bound and calculate the soil pressure and the critic height, energy equilibrium theorems and programming resolutions were employed. It is pointed that groundsill and backfill material properties and reinforcement effect on abutment backfill stability markedly. The results indicate that increasing groundsill and backfill material strength, using light backfill material, dense and high strength reinforcing are propitious to backfill stability. |
| |
| Keywords: | abutment-backfill limit analyses upper-bound theorems velocity field energy equilibrium |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
