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     劉   君

 

         （臨朐縣沂山水庫運行維護中心 ，濰坊 262613)

摘   要 ：探討水庫溢洪道混凝土泄槽面板在氯鹽侵蝕環(huán)境下的性能變化 ， 以揭示不同濃度氯鹽溶液及侵蝕  時間對混凝土耐久性的影響。制備摻有鋼纖維的水庫溢洪道混凝土泄槽面板試件 ，將其置于氯鹽干濕循環(huán)試驗  箱中進(jìn)行模擬環(huán)境試驗。設(shè)定四種不同氯化鈉溶液濃度。在設(shè)定的測試周期內(nèi) ，對混凝土試件的抗壓強度 、質(zhì)  量變化率以及表面形貌進(jìn)行定期檢測。結(jié)果表明： 氯鹽侵蝕對水庫溢洪道混凝土泄槽面板的耐久性具有顯著影  響 ，通過優(yōu)化混凝土配比 、提高抗氯鹽侵蝕能力或采取防護措施 ，可以有效減緩氯鹽侵蝕對混凝土性能的損害。 成果可為相關(guān)工程提供參考。

關(guān)鍵詞：水庫溢洪道 ；混凝土泄槽面板 ；氯鹽 ；侵蝕性能 ；力學(xué)性能

中圖分類號：TU521 . 3           文獻(xiàn)標(biāo)志碼：A            

文章編號： 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

作者簡介： 劉    君  (1986—) ,   女 ，本科 ，工程師 ，研究方向 ：水利工程。

收稿日期：2024 - 12 - 27