| 桥头粉喷桩复合地基工后沉降原因分析 |
| |
| 引用本文： | 张仪萍,俞亚南,周宏伟.桥头粉喷桩复合地基工后沉降原因分析[J].岩土力学,2006,27(7):1171-1175. |
| |
| 作者姓名： | 张仪萍 俞亚南 周宏伟 |
| |
| 作者单位： | 1. 浙江大学 建筑工程学院，杭州 310027；2. 宁波市城市投资股份有限公司，宁波 315000 |
| |
| 摘 要： | 为了研究引起搅拌桩复合地基工后沉降的原因，针对粉喷桩加固桥头软基沉降进行Biot固结有限元正反分析。有限元分析时的土体本构模型采用Duncan-Chang非线性弹性模型，反分析时的土体本构模型分别采用Duncan-Chang非线性 弹性模型和Merchant黏弹性模型。计算分析表明，引起粉喷桩加固地基工后沉降的主要因素：早期时是交通荷载引，而后期土体蠕变的影响则占主导地位。
|
| 关 键 词： | 粉喷桩 沉降 交通荷载 蠕变 |
| 文章编号： | 1000-7598-（2006）07-1171-05 |
| 收稿时间： | 2004-10-18 |
| 修稿时间： | 2005-01-14 |
Study on causes of post-construction settlement of DJM pile composite foundation at bridge approaches |
| |
| ZHANG Yi-ping,YU Ya-nan,ZHOU Hong-wei.Study on causes of post-construction settlement of DJM pile composite foundation at bridge approaches[J].Rock and Soil Mechanics,2006,27(7):1171-1175. |
| |
| Authors: | ZHANG Yi-ping YU Ya-nan ZHOU Hong-wei |
| |
| Institution: | 1.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China; 2.Ningbo City Investment Stock Limited Company, Ningbo 315000, China |
| |
| Abstract: | In order to study the causes of post-construction settlement of deep-jet-mixed(DJM) pile composite foundation at bridge approaches, the settlement is analyzed and back-analyzed by Biot’s consolidation FEM. The soil constitutive model is the Duncan-Chang nonlinear elastic model in finite element analysis; and Duncan-Chang nonlinear elastic model and Merchant viscoelastic model are used in finite element back-analysis. The computation results show that the traffic load and soil creep are the main causes induced the post-construction settlement of DJM pile composite foundation. The traffic load is the main cause at early period, but soil creep is the main cause at post period. |
| |
| Keywords: | DJM(deep-jet-mixed) pile settlement traffic load creep |
| 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 |
