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| 新老路基拼接中差异沉降的数值模拟 | |
| 引用本文： | 唐朝生,刘义怀,施斌,蔡奕,朱友群.新老路基拼接中差异沉降的数值模拟[J].中国公路学报,2007,20(2):13-17. |
| 作者姓名： | 唐朝生 刘义怀 施斌 蔡奕 朱友群 |
| 作者单位： | 1. 南京大学,地球环境计算工程研究所,江苏,南京,210093 2. 东南大学,交通学院,江苏,南京,210096;江苏省高速公路建设指挥部,江苏,南京,210004 3. 南京大学,地球环境计算工程研究所,江苏,南京,210093;江苏省交通科学研究院,江苏,南京,210017 |
| 摘 要： | 以扩建中的沪宁高速公路为实例,运用FLAC3D程序对高速公路新老路基拼接中所产生的差异沉降问题进行了数值模拟分析,对拼接路基在荷载作用下的应力与变形特征以及差异沉降的发生过程进行了研究,讨论了路基的变形发展及应力的集中与分布情况。结果表明:新老路基的拼接部位是整个拓宽公路最薄弱的环节,水平应力和竖向应力都在拼接部位发生应力集中,最大沉降发生在新拓宽路基形心位置下方,采用台阶式拼接是一种控制新老路基差异沉降的有效方法。 |
| 关 键 词： | 道路工程 新老路基拼接 数值模拟 差异沉降 高速公路 |
| 文章编号： | 1001-7372（2007）02-0013-05 |
| 收稿时间： | 2006-06-25 |
| 修稿时间： | 2006年6月25日 |
Numerical Simulation on Differential Settlement of Jointing of New and Old Roadbed |
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| TANG Chao-sheng,LIU Yi-huai,SHI Bin,CAI Yi,ZHU You-qun.Numerical Simulation on Differential Settlement of Jointing of New and Old Roadbed[J].China Journal of Highway and Transport,2007,20(2):13-17. | |
| Authors: | TANG Chao-sheng LIU Yi-huai SHI Bin CAI Yi ZHU You-qun |
| Institution: | 1. Computational Engineering Institute for Earth Environment, Nanjing University, Nanjing 210093, Jiangsu, China; 2. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China; 3. Freeway Construction Headquarters of Jiangsu Province, Nanjing 210004, Jiangsu, China;4. Transportation Research Institute of Jiangsu Province, Nanjing 210017, Jiangsu, China |
| Abstract: | For the purpose of investigating the differential settlement problem occurred in jointing the new and old roadbed of freeway,the freeway from Nanjing to Shanghai,which was being extended,was chosen as an example and was simulated and analyzed by applying FLAC3D.The characteristics of the stress and deformation,the developing process of differential settlement were studied after the load was added to the jointed embankments;deformation and development of roadbed,concentration and distribution of stress were discussed.It is indicated from the results that both the horizontal and vertical stresses concentrate in the jointed area which is the most unsubstantial position for the roadbed.The largest settlement occurs below the center of shape of the new extended roadbed.It is found that the method of step-jointing is effective for reducing and controlling the differential settlement of jointing of new and old roadbed. |
| Keywords: | road engineering jointing of new and old roadbed numerical simulation differential settlement freeway |
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