河谷水文地质结构影响下地下温度场的数值模拟研究  

Numerical simulation of underground temperature field under the influence of hydrogeological structure of river valley

作　　者：梁敬沿 漆继红[1] 李辉 刘杰[3] 许模[1] LIANG Jing-yan;QI Ji-hong;LI Hui;LIU Jie;XU Mo(College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,Sichuan 610059;Chengdu Engineering Corporation Limited,Power Construction Corporation,Chengdu,Sichuan 610072,P.R.China;Sichuan Electric Power Design Consulting Co.,Ltd.,Chengdu,Sichuan 610041)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059 [2]中国电建集团成都勘测设计院有限公司,四川成都610072 [3]四川电力设计咨询有限责任公司,四川成都610041

出　　处：《地下水》2025年第1期6-10,共5页Ground water

摘　　要：水文地质结构控制地下水渗流的理论被广泛应用于各领域的水文地质模型研究中,目前主要以地下水监测、示踪分析及水文地质试验作为主要分析手段对其进行研究。本文从地下水渗流与地温的关系入手,利用钻孔孔内温度随埋深的变化对地下水渗流特征进行分析,进一步辨识河谷水文地质结构。文章着眼位于岸坡深切河谷区、涉及Ⅳ级、Ⅴ级地质结构的工程岩体,依据含水介质结构面的特点将其分为卸荷型、构造结构面组合、层面构造三种水文地质结构亚类,通过COMSOL Multiphysics模拟了不同深切河谷水文地质结构亚类岩体理想状态下的渗流-温度分布特征,认识地下温度场在渗流过程的变化趋势,研究不同渗流-温度特征关系组合对水文地质结构的指示作用。结果表明:(1)不同的水文地质结构控制下的地下温度场具备独特的分布特征;(2)主要渗流通道的分布是控制地温场分布的主要因素,控制地温场在不同渗流部位表现出各异的变化趋势;(3)多个渗流部位的温-深特征组合分析能够较为直观的指示岩体的主要渗流通道,加深水文地质结构特征的认识。该方法延展了钻探测温资料的利用,是一种快捷、经济且实用的水文地质结构识别方法。The conceptual framework of hydrogeological structure controlling groundwater flow patterns has been widely applied in various field′s research of hydrogeological models.Therefore,understanding hydrogeological structures is an important for studying flow fields.In the past,analytical methods primarily included groundwater monitoring,tracer analysis,and hydrogeological experiments.This article focuses on the relationship between groundwater flow and ground temperature by examining temperature changes with depth inside boreholes to identify hydrogeological structures in river valley areas involving engineering rock mass structures and rock block structures.Hydrogeological structure are classified into three subtypes based on their characteristics:unloading type,combination type with structural planes,and stratified structural.Using COMSOL Multiphysics simulation software,different idealized permeability-temperature distribution features for each subtype are analyzed to understand variations in underground temperature during the process of groundwater flow.The study also investigates how different combinations of permeability-temperature features relate to indicating specific hydrogeological structures.The findings suggest that:(1)Underground temperature fields exhibit distinct distribution characteristics under varying hydrogeological structures.(2)The distribution of primary flow channels plays a crucial role in determining the distribution patterns of temperature fields,with different trends observed at different flow locations.(3)Analyzing the temperature-depth characteristics at multiple flow locations can offer a more intuitive indication of the main flow channels within rock formations,thereby enhancing our understanding of hydrogeological structure features.This approach expands the utilization of drilling temperature data and represents a rapid,cost-effective,and practical method for identifying hydrogeological structures.

关 键 词：水文地质结构 渗流场 地温场 结构控水 深切河谷 

分 类 号：P314.1[天文地球—固体地球物理学]