三峡工程二期围堰运行期变形特性研究

›› 2007, Vol. 28 ›› Issue (4): 747-752.

三峡工程二期围堰运行期变形特性研究

蒋中明^１，顾正华²，张新敏¹，孙志禹³

1. 长沙理工大学岩土工程研究所，长沙，湖南，410076；2. 浙江大学建筑工程学院，杭州，浙江，310028； 3. 中国长江三峡开发总公司,宜昌，湖北，443000

收稿日期:2005-03-14 出版日期:2007-04-10 发布日期:2013-09-05
作者简介:蒋中明，男，1969年生，博士后，副教授，主要从事岩土力学与工程科研教学工作。

Study on deformation character of Three Gorges Project’s 2nd phase cofferdam during its operation period

JIANG Zhong-ming¹, GU Zheng-hua², ZHANG Xin-min¹, SUN Zhi-yu³

1. Institute of Geotechnical Engineering,Changsha University of science &technology, Changsha, Hunan 410076, China; 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310028, China; 3. Three Gorges Project development Company of China, Yichang, Hubei, 443000, China

Received:2005-03-14 Online:2007-04-10 Published:2013-09-05

摘要/Abstract

摘要： 基于土石坝分析的Duncan E-? 本构模型，研究了土石坝分析的3参量流变模型，并编制了围堰流变分析程序。根据三峡工程二期围堰运行前期的部分实测变形数据，反演分析了流变分析所需的计算参数。流变分析表明，三峡工程二期围堰结构的水平和垂直流变变形存在时间上的不同步性，垂直流变位移的稳定时间在堰体结构施工完成后的6个月左右，而水平流变位移的稳定时间只需要3个月。围堰结构的后期流变位移平均值是流变初期时位移的2～3倍。

关键词: Duncan E-? 本构模型, 三参数流变模型, 三峡工程二期围堰, 流变变形

Abstract: Based on the Duncan E-? constitutive model used for analyzing soil-rock dams, 3 parameters creep model used for studying creep deformation of soil-rock dams is developed and programmed. According to the measured deformation data of Three Gorges Project’s 2nd phase cofferdam of early operation period, calculation parameters used for creep analysis are inverse-analyzed using artificial neural networks. The calculated results indicate that the vertical deformation rule of cofferdam versus time and horizontal deformation rule of cofferdam versus time is different from each other. It is also indicated that the stable time needed for vertical creep displacement is about 6 months after the cofferdam is constructed and the stable time needed for horizontal creep displacement is only 3 months. It also shows that the average creep displacement value of the cofferdam structure is 2-3 times of the initial displacement.

Key words: Duncan E-? constitutive model, 3 parameters creep model, Three Gorges Project’s 2nd phase cofferdam, creep deformation

中图分类号:

TU 433

蒋中明，顾正华，张新敏，孙志禹 . 三峡工程二期围堰运行期变形特性研究[J]. , 2007, 28(4): 747-752.

JIANG Zhong-ming , GU Zheng-hua , ZHANG Xin-min , SUN Zhi-yu . Study on deformation character of Three Gorges Project’s 2nd phase cofferdam during its operation period[J]. , 2007, 28(4): 747-752.

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