Characterization of stress distribution before and after excavation 
in permanent shiplock of Three Gorges Project

YANG Shu-xin; XU Zhao-yi; LI hong

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Characterization of stress distribution before and after excavation in permanent shiplock of Three Gorges Project

更新时间：2026-06-25

- Characterization of stress distribution before and after excavation in permanent shiplock of Three Gorges Project
- Vol. 27, Issue S2, (2006)
- 作者机构：
  
  1. 北京交通大学,北京,100044
  2. 中国地震局地壳应力研究所,北京,100085
- 作者简介：
- 基金信息：
- DOI：
  CLC： O319.56
- Online First：16 December 2006，
  
  Published：2006
- 稿件说明：
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YANG Shu-xin, XU Zhao-yi, LI hong. Characterization of stress distribution before and after excavation in permanent shiplock of Three Gorges Project[J]. 2006, 27(S2).
DOI：

YANG Shu-xin, XU Zhao-yi, LI hong. Characterization of stress distribution before and after excavation in permanent shiplock of Three Gorges Project[J]. 2006, 27(S2). DOI：

摘要

根据实测资料研究了三峡工程区地应力分布特征。三峡工程区浅部和深部的构造应力状态有明显差异，最大水平主应力在浅部表现为NEE向，而深部则表现为NW向，船闸区浅部最大水平主应力方向为NNE向。对永久船闸开挖前后应力分布进行了测量研究。永久船闸开挖前后应力状态有显著的重新调整分布，东西向应力在边坡岩体不同层位（不同高程）有增有减，应力释放量较小；而南北向应力在边坡岩体中上部均减小，应力释放量较大，开挖后坡角部位有应力集中现象。受开挖影响，最大水平主应力方向由开挖前的近NE向发生顺时针方向偏转，变为近东西向。

Abstract

The characteristics of stress distribution has been studied based on the measuring data in Three Gorges Project. There is obvious difference between shallow and deep tectonic stress states

the direction of the maximum horizontal principal stress is NEE at shallow depth

but it is NW at great depth

and is NNE at permanent shiplock at shallow depth. The characteristics of stress distribution in permanent shiplock before and after excavation has been studied. The stress states have been readjusted and distributed before and after excavation in permanent shiplock; the stresses in the EW direction increase or decrease at different altitudes in the slope rockmass; the stress release is smaller. The stresses in the SN direction decrease in middle and upper part in the slope rockmass; stress release is rather large; and there is stress concentration at grading angle part after excavation. The direction of maximum horizontal principal stress rotates in clockwise

change from NE to EW direction with the excavation of permanent shiplock.

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