Seepage and stress analysis of anti-seepage structures constructed with different concrete materials in an RCC gravity dam
Seepage and stress analysis of anti-seepage structures constructed with different concrete materials in an RCC gravity dam
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碾压混凝土重力坝不同混凝土材料防渗结构渗流及受力分析
DOI：
10.1016/j.wse.2015.10.001
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发表时间：
2015-10
影响因子：
4
通讯作者：
李明超
中科院分区：
文献类型：
--
作者：
李明超
采用有限元法分析了某碾压混凝土坝上游防渗层采用不同混凝土材料（包括三级配碾压混凝土、二级配碾压混凝土、常规振捣混凝土（CVC）和富浆振捣碾压混凝土（GEVR））的应力场和渗流场，分别对应设计方案S1 ~ S4。并在正常蓄水位和校核洪水位下，对四种设计方案防渗层的防渗性能进行了评价。对某挡水段和泄水段的应力场分析表明，最大拉应力出现在坝踵附近，最大压应力出现在坝趾附近，4种方案的应力分布均满足应力控制标准。渗流场分析表明，方案S3和S4的扬压力水头在防渗区迅速下降，稳定渗流条件下的日渗流量计算结果比其他两个方案低30%~ 50%，说明CVC和GEVR具有较好的防渗性能。研究结果为碾压混凝土坝物理模型试验和防渗结构选型提供了必要的扬压力水头和渗流参数。
This study used the finite element method (FEM) to analyze the stress field and seepage field of a roller-compacted concrete (RCC) dam, with an upstream impervious layer constructed with different types of concrete materials, including three-graded RCC, two-graded RCC, conventional vibrated concrete (CVC), and grout-enriched vibrated RCC (GEVR), corresponding to the design schemes S1 through S4. It also evaluated the anti-seepage performance of the imperious layer in the four design schemes under the normal water level and flood-check level. Stress field analysis of a retaining section and discharge section shows that the maximum tensile stress occurs near the dam heel, the maximum compressive stress occurs near the dam toe, and the stress distributions in the four schemes can satisfy the stress control criteria. Seepage field analysis shows that the uplift pressure heads in schemes S3 and S4 descend rapidly in the anti-seepage region, and that the calculated results of daily seepage flow under the steady seepage condition in these two schemes are about 30%-50% lower than those in the other two schemes, demonstrating that CVC and GEVR show better anti-seepage performance. The results provide essential parameters such as the uplift pressure head and seepage flow for physical model tests and anti-seepage structure selection in RCC dams.
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DOI：
--
发表时间：
1991
期刊：
--
影响因子：
--
作者：
Y. Reich
通讯作者：
Y. Reich
DOI：
10.1061/(asce)0899-1561(1992)4:1(27
发表时间：
1992-02
影响因子：
3.2
作者：
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通讯作者：
N. Banthia;M. Pigeon;J. Marchand;J. Boisvert
影响因子：
1.4
作者：
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通讯作者：
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DOI：
10.1016/j.advengsoft.2005.01.001
发表时间：
2005-08
期刊：
Adv. Eng. Softw.
影响因子：
--
作者：
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通讯作者：
Hongwei Xie;Yaolong Chen
影响因子：
4
作者：
Tongchun Li;Dan Li;Zhi-qiang Wang
通讯作者：
Tongchun Li;Dan Li;Zhi-qiang Wang