Maintenance and Repair System by Cathodic Protection for Post-tension PC Structures under Marine Environment

海洋环境下后张法PC结构阴极保护检修系统

• 批准号: 11450170
• 负责人: YAMAGUCHI Toshinobu
• 金额: $ 9.28万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450170/
• 关键词: Cathodic Protection; Post-tension; PC Tendon; Monitoring; Marine Environment; Effect of Cathodic Protection; PC構造物; 水素脆化; 通電特性; シース; 緊張力; 塩害; 鋼材電位

(1)In the same current density at the anode, the potential shift of PC tendon in post-tensioned method would be less than that of pre-tensioned method, due to the existence of the sheath.(2)When the cathodic protection is applied to the steel sheath having the defect due to the corrosion itself, some current flows through the defect and concentrates to a part of inside PC tendon. However, this concentration, which occurs in limited area under the defect, can be considered as profitable phenomenon to avoid the corrosion of PC tendons in the vicinity of the defect.(3)When the cathodic protection is applied to the steel sheath having the air void inside of it, potential shifts under the void are increasing in PC tendon and decreasing in the sheath. By making use of this phenomenon, it may be possible to propose a non-destructive technique in order to investigate the air-void in the sheath.

(1)在相同的阳极处电流密度下，后张法PC筋的电位漂移比先张法的小，这是由于保护层的存在。(2)当对有腐蚀缺陷的钢套进行阴极保护时，部分电流流过缺陷，集中到PC筋内部的一部分。然而，这种集中出现在缺陷下有限的区域内，这是一种有益的现象，可以避免缺陷附近的PC筋的腐蚀。(3)对内部有气孔的钢套进行阴极保护时，孔洞下的电位漂移在PC筋中增加，在鞘中减少。通过利用这一现象，有可能提出一种非破坏性技术来研究护套中的气孔。

项目成果

Experimental Studies on Cathodic Protection for Post-tensioned PC Structures

后张法PC结构阴极保护实验研究

• 发表时间: 2001
• 期刊: Proceedings of the Japan Concrete Institute Vol.23、No.1
• 作者: T.Yamaguchi;S.Maeda;K.Yoshimoto;K.Takewaka
• 通讯作者: K.Takewaka

Influence of defects in concrete on cathodic protection

混凝土缺陷对阴极保护的影响

• 发表时间: 2006
• 期刊: Fifth CANMET/ACI international conference on durability of concrete
• 作者: M.YAMAMOTO

Effect of Cathodic Protection On Post-Tensioned PC Structures

阴极保护对后张法 PC 结构的影响

• 发表时间: 2001
• 期刊: Proceedings of the eighth easdt asia-pacific conference on structural enginnering and construction
• 作者: T.Yamaguchi

前田聡: "ポストテンションPC部材に電気防食法を適用する際の諸問題について"平成12年度土木学会西部支部研究発表会講演概要集. 第1分冊. A502-503 (2001)

Satoshi Maeda：“对后张 PC 构件应用阴极保护时的问题”2000 年日本土木工程师学会西部分会研究报告摘要第 1 卷。A502-503 (2001)。

ポストテンション方式PC構造物への電気防食法の適用に関する実験的研究

后张法PC结构阴极保护应用试验研究

• 发表时间: 2001
• 期刊: コンクリート工学年次論文報告集 23
• 作者: 山口明伸