论文部分内容阅读
针对广州典型地下隧道进行了耐久性环境侵蚀因素和结构耐久性工程调查。调查得出,广州一般侵蚀环境地下结构耐久性破坏主要因素为碳化侵蚀、氯离子侵蚀和硫酸根离子侵蚀,封闭的地下空间集聚了较高的CO2浓度、较大的相对湿度和较高的温度,比大气环境更加恶劣,加快了结构耐久性破坏。广州上世纪60年代建设的地下人防工程设计上缺乏结构耐久性技术要求,九号工程经过40余年的使用,地下结构耐久性状况较差,地下结构进入大范围维修时期。上世纪90年代建设的地铁一号线隧道,运营10多年后,一些区间施工缝和沉降缝等部位开始进入中度维修期,但总体情况良好。
For the typical underground tunnel in Guangzhou conducted a durability of environmental corrosion and structural durability of the project investigation. According to the survey, the main factors causing the damage to the underground structures in general erosion environment in Guangzhou are carbonation erosion, chloride ion erosion and sulfate ion erosion. The enclosed underground space has a higher CO2 concentration, a larger relative humidity and a higher temperature , Worse than the atmospheric environment, speeding up the durability of the structure damage. The design of underground civil air defense works in Guangzhou in the 1960s lacks technical requirements for structural durability. After more than 40 years of operation, the durability of underground structures has been poor. Underground structures have entered a large-scale maintenance period. After the operation for more than 10 years, some tunnels such as construction joints and settlement joints started to enter the moderate maintenance period. However, the overall situation is good.