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

JIANG Zhong-ming; GU Zheng-hua; ZHANG Xin-min; SUN Zhi-yu

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

更新时间：2026-06-25

- Study on deformation character of Three Gorges Project’s 2nd phase cofferdam during its operation period
- Vol. 28, Issue 4, (2007)
- 作者机构：
  
  1. 长沙理工大学岩土工程研究所,湖南,长沙,410076
  2. 浙江大学建筑工程学院,浙江,杭州,310028
  3. 中国长江三峡开发总公司,湖北,宜昌,443000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU433
- Online First：05 September 2013，
  
  Published：2007
- 稿件说明：
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JIANG Zhong-ming, GU Zheng-hua, ZHANG Xin-min, et al. Study on deformation character of Three Gorges Project’s 2nd phase cofferdam during its operation period[J]. 2007, 28(4).
DOI：

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

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。

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.

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