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对甘肃省境内工业污染或碳化地区、自重湿陷性黄土湿陷变形地区、干湿循环地区、冻融循环地区、盐渍土侵蚀地区的11座变电站建构筑物的混凝土破坏情况进行了调研,并通过试验分析获得与混凝土耐久性相关的各项技术指标。结果表明:地基土及地下水中的金属、非金属离子浓度均有不同程度的超标,严重影响了混凝土工程的使用寿命,从宏观上表现为混凝土表面出现裂缝、剥落、破损。针对上述问题,根据不同地质条件提出了相关的防治和补救措施,可为甘肃省境内高寒恶劣环境条件下变电站建构筑物耐久性的评价提供理论依据和技术支持。
The destruction of concrete structures of 11 substations in industrial pollution or carbonation areas, collapsible collapsible weight collapsible area, wet-dry circulation area, freeze-thaw circulation area and salinized soil erosion area were investigated and analyzed. Obtained through the test and durability of concrete-related technical indicators. The results show that the concentration of metal and nonmetal ions in foundation soil and groundwater exceed the standard to some extent, which seriously affects the service life of concrete engineering. Macroscopically, cracks, spalling and breakage appear on the concrete surface. In view of the above problems, according to different geological conditions, put forward relevant prevention and cure measures, which can provide theoretical basis and technical support for the evaluation of durability of substation structures under the harsh environment of alpine in Gansu Province.