雄安新区水土腐蚀性地质成因研究

Study on the geological origin of groundwater and soil corrosivity in Xiong’an New Area

河北雄安新区是一座正在建设的城市。随着新区城市建设的加快,浅层地下水和土壤对工程的腐蚀性及对工程结构设计的影响也越来越受到关注。本文对雄安新区地下水和土壤的腐蚀性进行了评价和分区研究,分析了地下水和土壤腐蚀性的特征。结果显示,水文地球化学反应-迁移-分异过程、包气带淋滤作用与全新世淤泥质粉质粘土吸附作用,是形成雄安新区高水土腐蚀性地区的地质条件。本次研究是城市地质调查工作全面支撑规划建设的一次有力实践,可以为雄安新区的城市规划和工程建设提供借鉴。

Xiongan New Area in Hebei is a city under constuction.With the acceleration of urban construction,the corrosiveness of shallow groundwater and the influence on engineering structure has been paid more and more attention.In this paper,the groundwater and soil corrosivity in Xiongan New Area were evaluated and subdivided,and the characteristics of groundwater and soil corrosivity were analyzed.It concluded that the geological conditions of forming high groundwater and soil corrosivity in Xiongan New Area were hydrogeochemical reaction-migration-differentiation,vadose zone leaching and Holocene silty clay adsorption.This research is a powerful practice for urban geological survey to support the planning and construction,it can provide reference for the urban planning and engineering construction of Xiongan New Area.