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     刘   君

 

         （临朐县沂山水库运行维护中心 ，潍坊 262613)

摘   要 ：探讨水库溢洪道混凝土泄槽面板在氯盐侵蚀环境下的性能变化 ， 以揭示不同浓度氯盐溶液及侵蚀  时间对混凝土耐久性的影响。制备掺有钢纤维的水库溢洪道混凝土泄槽面板试件 ，将其置于氯盐干湿循环试验  箱中进行模拟环境试验。设定四种不同氯化钠溶液浓度。在设定的测试周期内 ，对混凝土试件的抗压强度 、质  量变化率以及表面形貌进行定期检测。结果表明： 氯盐侵蚀对水库溢洪道混凝土泄槽面板的耐久性具有显著影  响 ，通过优化混凝土配比 、提高抗氯盐侵蚀能力或采取防护措施 ，可以有效减缓氯盐侵蚀对混凝土性能的损害。 成果可为相关工程提供参考。

关键词：水库溢洪道 ；混凝土泄槽面板 ；氯盐 ；侵蚀性能 ；力学性能

中图分类号：TU521 . 3           文献标志码：A            

文章编号： 1005- 8249  (2025)  03- 0054- 04

 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .03 .010

 LIU Jun

(Yishan Reservoir Operation and Maintenance Center in Linqu Country,  Weifang 262613 ,China)

Abstract: Explore the performance changes of concrete spillway panels in chloride salt erosion environments for reservoir spillways, in order to reveal the effects of different concentrations of chloride salt solutions and erosion times on the durability of concrete. Prepare the concrete spillway panel specimens of the reservoir spillway mixed with steel fibers and place them in a chloride salt wet dry cycle test chamber for simulated environmental testing. Set the concentrations of sodium chloride solution to 5%, 10%, and 15%, corresponding to the three experimental groups ABC, respectively. Regularly inspect the compressive strength, mass change rate, and surface morphology of concrete specimens within the set testing period. The experimental results showed that after the 5th wet dry cycle (150 days), the mass change rate of the specimens changed from negative to positive, with the C group (15%NaCl solution) having the highest mass change rate of 0.78%; The compressive strength change rate reached its maximum value of -3.48% in the sixth wet dry cycle. Chloride erosion has a significant impact on the durability of concrete spillway panels in reservoirs. By optimizing concrete mix proportions, improving resistance to chloride erosion, or taking protective measures, the damage of chloride erosion to concrete performance can be effectively mitigated.

Keywords: reservoir spillway; concrete spillway panel; chloride salt; erosion properties; mechanical properties

作者简介： 刘    君  (1986—) ,   女 ，本科 ，工程师 ，研究方向 ：水利工程。

收稿日期：2024 - 12 - 27