基于PHREEQC的某大坝排水洞析出物定量预测  

Quantitative prediction of precipitate in a dam’s drainage holes based on PHREEQC

作　　者：彭红明[1] 梁杏[2] 毛绪美[1] 梁莉莉[1] 李静[1] 

机构地区：[1]中国地质大学(武汉)环境学院,武汉430074 [2]生物地质与环境地质教育部重点实验室,武汉430074

出　　处：《水文地质工程地质》2010年第4期111-115,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学青年基金资助项目(40602031);中国地质调查局计划项目专题<地下水系统理论与应用指南>(12120733908)

摘　　要：水工建筑物排水孔洞中常常析出大量各色固体物质,对水工建筑物的安全稳定运行产生不可忽视的影响。某大型水利工程排水孔洞中析出物是典型的地下水环境变化下的水文地球化学现象,应用PHREEQC定量模拟析出量结果表明:单位长度析出量介于0.0303～0.9124kg/a,大坝析出物问题并不严重;一、二、三、五、七号单元的单位长度析出量小于0.66kg/a;四号、六号单元的单位长度析出量分别为0.8656kg/a和0.9124kg/a,属于相对危险部位,应该重点监测。应用PHREEQC定量模拟水-岩相互作用,揭示析出物的水文地球化学变化过程,可以为大坝安全监测提供科学依据。Large numbers of precipitates are often found in the drainage holes of hydraulic construction and they have adverse effect to hydraulic construction＇s security steady operation.Precipitate in drainage holes of a large hydraulic construction is a typical hydrogeochemistry phenomenon when ground water environmental changes.The PHREEQC simulation result indicates that when the amount of precipitate in unit length is situated between 0.030328kg /a and 0.912361kg /a the dam separation phenomenon is not serious.The amounts of unit one,two,three,five and seven are smaller than 0.66kg /a.The amounts of unit four and six are 0.865574kg /a and 0.912361kg /a respectively,where are dangerous spots,so it should be focused on monitoring.Quantitative simulation of water-rock interaction with PHREEQC,revealing the hydrogeochemical change process of precipitate,can provide a scientific basis for dam safety monitoring.

关 键 词：PHREEQC 析出物 水-岩作用 定量预测 

分 类 号：P641.3[天文地球—地质矿产勘探]