摘要
以天津滨海核心区为例,对滨海地区地下潜水的工程特性进行了研究,查清了滨海核心区潜水富水层、潜水含水层的岩性组成、空间分布以及渗透性能,分析了滨海核心区潜水水位现状及其动态变化规律,给出了滨海核心区Cl^(-)、SO^(2-)_(4)等常用水质简分析指标的范围值,并对其水质现状进行评价。研究结果表明:(1)滨海核心区潜水水位埋藏深度较浅,多分布在Q^(3N)_(4)al层、Q^(1)_(4)al层以及Q^(2)_(4)m层粉土等富水层中,厚度一般小于6 m,其含水层的渗透系数一般在0.1~0.6 m/d,为弱透水性;(2)滨海核心区潜水水位年内动态随季节变化呈现出一定的规律,年内变幅一般为0.22~0.72 m,近5年最高水位整体有上涨趋势,涨幅在0.3 m左右;潜水水质近5年主要指标整体上有先减小后增大的趋势,水质状况总体较差。
Taking Tianjin Binhai core area as an example,the engineering characteristics of phreatic water in coastal area were studied.The lithological composition,spatial distribution and permeability of the phreatic water-rich aquifer and phreatic aquifer in Binhai core area were investigated,and the status and dynamic change of the phreatic water level were analyzed.The range values of water quality analysis indexes such as Cl^(-),SO^(2-)_(4)were provided,and their water quality was evaluated.The results show that:(1)The phreatic water level in the Binhai core area is shallow and mainly distributed in silts layers of Q^(3N)_(4)al,Q^(1)_(4)al and Q^(2)_(4)m and other phreatic water-rich aquifer,with a thickness of less than 6 m.The permeability coefficient of phreatic aquifers is generally 0.1~0.6 m/d,indicating weak permeability.(2)The annual dynamics of the phreatic water level in Binhai core area show a certain law with seasonal changes.The annual variation range is generally 0.22~0.72 m in the past five years,and the maximum water level in the past five years has an overall upward trend,which is about 0.3 m.The main indicators of phreatic water quality in the past five years have the trend of decreasing first and then increasing,and the water quality is poor.
作者
温伟光
路清
刘晓磊
王辉
宋文静
Wen Weiguang;Lu Qing;Liu Xiaolei;Wang Hui;Song Wenjing(Tianjin Survey Design Institute Group Co.,Ltd.,Tianjin 300191,China;Tianjin Taikan Engineering Technology Consulting Co.,Ltd.,Tianjin 300191,China)
出处
《岩土工程技术》
2022年第1期37-42,共6页
Geotechnical Engineering Technique
基金
天津市建委科技项目“天津市建筑与小区海绵城市建设关键技术研究”(2017-05)。
关键词
潜水含水层
潜水富水层
动态变化规律
滨海核心区
潜水水质
phreatic aquifer
phreatic water-rich aquifer
law of dynamic change
Binhai core area
phreatic water quality
