服役地下排水渠道耐久性环境因素分析  

Analysis of Environmental Factors on Durability of Underground Drainage Channels in Service

作　　者：王永杰 陈善长 杨建宇 Wang Yongjie;Chen Shanchang;Yang Jianyu

机构地区：[1]长沙市公共工程建设中心,湖南长沙410013 [2]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《重庆建筑》2022年第3期52-54,61,共4页Chongqing Architecture

基　　金：长沙市政府项目“红旗渠主渠结构加固试验段工法研究及实施”(CSCG20200598)。

摘　　要：服役砖混地下排水渠道由环境作用引起的耐久性问题十分突出。该文以长沙市红旗渠修复工程为例,通过对服役地下排水渠道所处的腐蚀性环境进行调研分析,总结了影响渠道结构耐久性的环境因素,并分析了各环境因素的腐蚀机理及对渠道缺陷形成的影响。研究表明,服役渠道结构处于多种因素共同作用的腐蚀环境中,影响渠道结构腐蚀破坏的环境因素主要为硫酸盐腐蚀、软水侵蚀及微生物腐蚀,而受碳化作用影响较小。研究成果可为城市老旧渠道结构修复或新建渠道结构耐久性设计及施工提供参考。The durability of the brick-concrete underground drainage channel in service under environmental effects is quite a serious problem.Based on the Hongqi Canal restoration project in Changsha City,and through the investigation and analysis of the corrosive environment of underground drainage channels in service,this paper summarized the environmental factors affecting the durability of the channel structure and analyzed the corrosion mechanism of various environmental factors and their influence on the formation of channel defects.The results showed that the in-service channel structure,lying in a corrosive environment where multiple factors work together,is largely destructed by sulfate corrosion,soft water corrosion and microbial corrosion,less affected by carbonization.The research results can provide references for the restoration of old channel structures or the durability design and construction of new channel structures in a city.

关 键 词：服役地下排水渠道 砖混结构 环境作用 耐久性 腐蚀机理 

分 类 号：TU398.5[建筑科学—结构工程]