四川省自一里水电站厂址区地下水来源识别  

Identification of groundwater sources in plant site area of Ziyili Hydropower Station in Schuan Province

作　　者：张世殊 刘希 施裕兵 许模[2,3] 彭仕雄 康小兵[2,3] ZHANG Shishu;LIU Xi;SHI Yubing;XU Mo;PENG Shixiong;KANG Xiaobing(POWERCHINA Chengdu Engineering Corporation Limited,Chengdu 610072,China;College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072 [2]成都理工大学环境与土木工程学院,四川成都610059 [3]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《人民长江》2021年第6期71-76,共6页Yangtze River

基　　金：中国电建集团成都院科技项目(P238-2014)。

摘　　要：四川省自一里水电站位于裂隙岩体较为发育的地带,地下水较为丰富。为减少水电站厂址区地下工程潜在涌突水灾害,查明该区地下水补给来源是关键。通过现场调查和取样分析,利用水化学分析、氢氧同位素相关性分析及同位素高程效应方法对地下水特征进行研究,并结合主要硐室的硐深和硐温变化规律识别地下水的补径排条件。研究结果表明:自一里水电站厂址区地下水主要接受大气降水补给,部分平硐同时接受地表水补给;地下水的水-岩作用比较明显,是控制水中离子成分的主要因素;平硐地下水的补给高程总体较高,补给方式存在一定的差异,远近不一,部分平硐存在交叉补给;根据矿化度和同位素特征,PD6平硐地下水的径流路径和时间较短,径流速度较快,处于浅表风化裂隙水循环带。The Ziyili Hydropower Station is located in a relatively developed area of fractured rock mass with rich groundwater.In order to reduce the potential water inrush disaster of underground projects in the hydropower station plant site,it is critical to identify the groundwater recharge source in the area.Through on-site investigation and sampling analysis,this paper studies the groundwater characteristics and the relationship between recharge and re-emission by means of hydrochemical analysis,hydrogen-oxygen isotope correlation analysis and isotope elevation effect methods,and identifies the conditions of groundwater re-emission in combination with the deep and temperature variation laws of the main adits.The research shows that the groundwater in the plant site of the Ziyili Hydropower Station mainly receives atmospheric precipitation recharge,and some adits also receives surface water recharge.Groundwater is affected by some evaporation in the process of infiltration.The water-rock effect of groundwater is obvious and is the main factor controlling ions in water.The elevation of groundwater recharge in adits is generally high,and there are certain differences in the way of recharge,and cross-recharge exists in some adits.According to mineralization and isotope characteristics,the runoff path and time of PD6 adit′s groundwater are short,the runoff speed is fast,and it is in the shallow weathering crack water cycle belt.

关 键 词：地下水化学特征 氢氧同位素 硐温特征 来源识别 自一里水电站 

分 类 号：P642.4[天文地球—工程地质学]