银川市城区浅层地下水对建筑材料的腐蚀性评价

Evaluation of Shallow Groundwater Corrosiveness on Construction Materials in Yinchuan City

为了研究银川市城区浅层地下水对建筑材料的腐蚀性情况,利用水井采集水样和工程地质钻孔采集水样的方式对浅层地下水(1~10 m)进行采集和实验室检测,统计检测数据并利用ArcGIS软件中的克里金插值法绘制研究区的综合评价分区图。结果表明:浅层地下水对混凝土结构具有弱—强的腐蚀性,强腐蚀分布于平伏桥村的铁路以西、魏家桥村以东;中等腐蚀分布于芦花村—平伏桥村—双渠口村—砖渠村—银丰村—新丰村—联丰村一带,魏家桥村和上前城村中部,以及德胜村东侧,呈条带状南北向展布,向东西两侧逐渐减弱;对混凝土结构中的钢筋具有微—中腐蚀性的地下水,主要分布于银川市城区芦花村—平伏桥村—双渠口村一带,沿东西两侧逐渐减弱。

In order to study the corrosiveness of shallow groundwater on construction materials in the urban area of Yinchuan City, water samples of shallow groundwater(1-10 m) from wells and boreholes are collected and laboratory tests are conducted.The test data are statistically analyzed and a comprehensive evaluation zoning map of the study area is drawn by Kriging interpolation method in ArcGIS software. The results show that the shallow groundwater has a weak-strong corrosive effect on the concrete structure, among which the strong corrosive waters are distributed to the west of the railroad in Pingfuqiao Village and east of Weijiaqiao Village;the medium ones are distributed in the area of Luhua Village-Pingfuqiao Village-Shuangqukou Village-Zhuanqu Village-Yinfeng Village-Xinfeng Village and Lianfeng Village, Weijiaqiao Village and the middle area of Shangqiancheng, as well as the east side of Desheng Village, showing a zonal north-south distribution, gradually weakening to the east and west sides;and the groundwater with slight-moderate corrosion to steel bars in concrete structures is mainly distributed in the area of Luhua Village-Pingfuqiao Village-Shuangqikou Village in Yinchuan City, and gradually weakens along the east and west sides.