水位变化对CFRD变形行为的影响

IF 0.4 Q4 ENGINEERING, GEOLOGICAL
Yun Jung Mann, G. Yea, H. Kim, Jae-Yeon Lee
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引用次数: 0

摘要

本文通过现场实测,对CFRD的位移进行了分析。从蓄水时间开始,了解坝体随水位变化的变形行为。并与数值分析结果进行了比较。通过对坝顶和下游坡体的蓄水特性测量,发现坝体轴线方向水平位移、上下游位移和沉降主要发生在水位达到坝高一半左右时。位移一直持续到水位达到最高点。此后,无论水位如何,它都表现出恒定的收敛。在所有位置上,最重要的面板水平位移是相似的。受蓄水前外部温度的影响,面板水平位移在冬季呈增大趋势,在夏季呈减小趋势。此外,位移增加,直到水位达到大坝高度的一半左右。之后,随着水位的上升,它们逐渐减少。结果表明,蓄水后面板的行为随季节变化和水位变化而变化。根据混凝土板的材料特性进行判断。数值分析表明,大坝建成后的最大沉降量和发生深度与实测数据略有不同。认为这是由于分析中输入参数的估计、施工周期、施工层厚等各种设计和施工差异造成的。从大坝整个工期来看,聚落多在建设期完成,也有部分聚落发生在蓄水初期,之后又汇合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Case Study on Deformation Behaviors of CFRD with Water Level Change
This paper analyzes the displacements of CFRD which was completed by field measurement. It is to understand the deformation behavior of the dam body according to the water level change from the impounding time. And it was compared with numerical analysis results. As a result of measuring the behavior of the dam crest and downstream slope according to impounding, horizontal displacements in axis direction of the dam, upstream and downstream displacements and settlements occurred mostly when the water level reaches about half of the dam height. The displacements continued until the water level reached its maximum. After that, it showed a constant convergence regardless of the water level. Horizontal displacements of the face slab which is the most important in CFRD were similar at all locations. The Horizontal displacements of the face slab showed the trends of increasing in winter and decreasing in summer due to the effect of the outside temperature before impounding. Also, the displacements increased until the water level reached about half of the dam height. After that, they decreased with rising in water level. As a result, the face slab behaviors according to seasonal change after impounding as well as water level condition. It is judged because of the material characteristics of the concrete slab. Numerical analysis showed slightly different maximum settlement and depth of occurrence from the measuring data after construction of the dam. It is considered that this is due to various design and construction differences such as the estimation of input parameters in analysis, construction period, and the layer thickness of construction. For the overall period of the dam, the settlements were mostly completed during the construction period and some settlements occurred in the early days of impounding and then converged.
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