三峡工程初期蓄水大坝变形监测成果分析

对三峡工程初期蓄水大坝变形监测成果的分析表明：大坝基础水平位移很小，处于稳定状态；坝基垂直位移总体呈沉降趋势，最大沉降量21．58mm，相邻坝段坝体沉降量绝大多数小于1mm，无不均匀沉降；左厂1～5号坝段等部位基础水平位移很小，坝基沉降量相对较小，无不均匀沉降；升船机上闸首坝段由于建基面高程较高，受蓄水影响不大，水平和垂直位移变化不大。总之，大坝变形量值均在设计范围内，规律合理，大坝工作性态正常，大坝是安全的。

Analysis of the results of dam deformation monitoring of Three Gorges Project during its initial impoundment period

The analysis of the deformation monitoring results of the Three Gorges Project during its initial impoundment period showed the horizontal displacement of dam foundation is very little and is in the stability state. The vertical displacement of the dam foundation is in the state of settlement with the maximum value of 21.58 mm, and most of its neighboring dam sections are less than 1 mm in settlement, without non-uniform settlement. The foundation horizontal displacement of No.1 to No.5 dam sections of left power station is very little and the settlement of dam foundation is also relative little, without non-uniform settlement. The horizontal and vertical movements of the dam section of the lock head of ship lift changes little, because of its high base surface elevation and little influence of the impoundment. In a word, the deformations of the dam are in the design range and the operation of the dam is normal so that the dam is safe.