冻融循环下溢洪道破坏与修复效果分析  

Analysis of Damage and Repair Effect of Spillway under Freeze-thaw Cycle

作　　者：展宗洋 毕金锋 罗先启[1] ZHAN Zongyang;BI Jinfeng;LUO Xianqi(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《徐州工程学院学报（自然科学版）》2021年第3期58-67,共10页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家自然科学基金项目(51279100)。

摘　　要：高寒地区四季温差、湿度交替变化较大,使得水工混凝土建筑物常处于冻融循环作用下,易发生表面剥落、内部开裂等现象,影响结构的正常使用.该文结合莲花水电站溢洪道表面混凝土破坏情况,利用渗流-温度-应力多场耦合理论,分别对混凝土和环氧砂浆的抗冻融效果进行模拟分析.研究结果表明:利用环氧砂浆对莲花水电站溢洪道表面进行修复后,冻融循环过程中最大主应力仅为混凝土的一半左右,抗冻融效果明显优于混凝土.Due to the large temperature difference and alternating humidity in the four seasons in the alpine region,hydraulic concrete structures are often subjected to freeze-thaw cycles,which are prone to surface spalling and internal cracking,affecting the normal use of the structure.Combined with the damage of the surface concrete of the spillway of the Lianhua Hydropower Station,the freeze-thaw resistance effects of concrete and epoxy mortar are simulated and analyzed with multi-field coupling theory of seepage-temperature-stress.The research results show that the maximum principal stress during freeze-thaw cycle is only about half of that of concrete after repairing the spillway surface of Lianhua Hydropower Station with epoxy mortar,and the freeze-thaw resistance is obviously better than that of concrete.

关 键 词：冻融循环 溢洪道 修复效果 多场耦合 数值模拟 

分 类 号：TU528[建筑科学—建筑技术科学]