小浪底灌区11号隧洞F29断层渗水问题的同位素水文地球化学研究
发布时间：2018-11-09 07:37
【摘要】：小浪底北岸灌区作为河南最重要的粮食生产核心区之一,通过工程建设,完善水利基础设施,搞好田间排灌体系,对于加快河南省粮食生产核心区建设,提高粮食综合生产能力,保障国家粮食安全具有积极意义。近年来,灌区范围内的济源市发展迅速,水资源供需矛盾更为突出,故需开辟新的水源。小浪底北岸灌区一期工程主要任务是由小浪底水库向济源市供水,而其11号隧洞涌水问题关系着整个工程能否顺利进行,小浪底北岸灌区受区域性断裂影响,场区内分布有次级断裂及裂隙发育,对隧洞影响规模较大,并出现了隧洞涌水问题。隧洞涌突水是隧洞施工和运营过程中常见的地质灾害。隧洞的涌突水严重危及隧洞施工的安全,影响隧洞施工的进度,而且如果隧洞施工措施不当,常常会使隧洞建成后运营环境恶劣,地表环境恶化,给人们的生产和生活造成重大的损失,因此对其进行研究对工程安全及供水问题的解决具有重要的理论及实践意义。本论文应用环境同位素与水文地球化学方法,以研究区裂隙型地下水补-径-排条件为主线,在区域水文地质条件的约束下,开展了F29断层周围地下水的补给、径流、排泄条件;大气降水、上部风化裂隙水、下部构造裂隙水之间的水力联系;隧洞涌水的来源及其混合比例;断层的水文地质意义等一系列问题的研究,对研究区地下水的水文地球化学特征及其水化学形成作用;研究区裂隙型地下水的δD、δ18O与3H等环境同位素特征;F29断层水的补给来源、补给高程;不同水流系统对隧洞涌水的贡献混合比例及潜在涌水量等相关水文地质问题提供了同位素水文地球化学证据。实践证明环境同位素与水文地球化学结合对于解决隧洞渗水问题有较强的示踪作用,可普遍用于水利工程隧洞渗水及相关水文地质问题。
[Abstract]:As one of the most important grain production core areas in Henan Province, the North Bank Irrigation District of Xiaolangdi, through engineering construction, improving water conservancy infrastructure and improving field drainage and irrigation system, will speed up the construction of grain production core areas in Henan Province. It is of positive significance to improve the comprehensive production capacity of grain and ensure national food security. In recent years, Jiyuan City in irrigation district has developed rapidly and the contradiction between supply and demand of water resources is more prominent, so it is necessary to open up new water sources. The main task of the first stage project of Xiaolangdi North Shore Irrigation District is to supply water from Xiaolangdi Reservoir to Jiyuan City. However, the water gushing problem of its No. 11 tunnel is related to whether the whole project can be carried out smoothly, and the irrigation area along the North Coast of Xiaolangdi is affected by regional faults. Secondary faults and fissures are distributed in the field area, which have a great influence on the tunnel scale, and the problem of tunnel water gushing appears. Tunnel water inrush is a common geological hazard in tunnel construction and operation. The water inrush of the tunnel seriously endangers the safety of the tunnel construction and affects the progress of the tunnel construction. Moreover, if the tunnel construction measures are not appropriate, the operation environment will be bad and the surface environment will deteriorate after the tunnel is completed. The research on it is of great theoretical and practical significance to solve the problems of engineering safety and water supply. Based on the environmental isotopic and hydrogeochemical methods, the recharge and runoff of groundwater around F29 fault are carried out under the constraints of regional hydrogeological conditions, taking the recharge, path and discharge conditions of fissured groundwater in the study area as the main line. Discharge conditions; The hydraulic relation between the upper weathering fissure water and the lower structural fissure water, the source of tunnel water gushing and its mixing ratio; A series of problems, such as hydrogeological significance of faults, have been studied on hydrogeochemical characteristics and hydrochemical formation of groundwater in the study area, environmental isotopic characteristics such as 未 D, 未 18O and 3H of fissured groundwater in the study area. Related hydrogeological problems such as the recharge source of F29 fault water, the recharge height, the contribution of different flow systems to the tunnel water inflow and the potential water inflow, etc., provide isotopic hydrogeochemical evidence. It is proved by practice that the combination of environmental isotope and hydrogeochemistry has a strong tracer effect on solving the seepage problem of tunnel and can be widely used in water conservancy engineering tunnel seepage and related hydrogeological problems.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV223.4
本文编号：2319772
[Abstract]:As one of the most important grain production core areas in Henan Province, the North Bank Irrigation District of Xiaolangdi, through engineering construction, improving water conservancy infrastructure and improving field drainage and irrigation system, will speed up the construction of grain production core areas in Henan Province. It is of positive significance to improve the comprehensive production capacity of grain and ensure national food security. In recent years, Jiyuan City in irrigation district has developed rapidly and the contradiction between supply and demand of water resources is more prominent, so it is necessary to open up new water sources. The main task of the first stage project of Xiaolangdi North Shore Irrigation District is to supply water from Xiaolangdi Reservoir to Jiyuan City. However, the water gushing problem of its No. 11 tunnel is related to whether the whole project can be carried out smoothly, and the irrigation area along the North Coast of Xiaolangdi is affected by regional faults. Secondary faults and fissures are distributed in the field area, which have a great influence on the tunnel scale, and the problem of tunnel water gushing appears. Tunnel water inrush is a common geological hazard in tunnel construction and operation. The water inrush of the tunnel seriously endangers the safety of the tunnel construction and affects the progress of the tunnel construction. Moreover, if the tunnel construction measures are not appropriate, the operation environment will be bad and the surface environment will deteriorate after the tunnel is completed. The research on it is of great theoretical and practical significance to solve the problems of engineering safety and water supply. Based on the environmental isotopic and hydrogeochemical methods, the recharge and runoff of groundwater around F29 fault are carried out under the constraints of regional hydrogeological conditions, taking the recharge, path and discharge conditions of fissured groundwater in the study area as the main line. Discharge conditions; The hydraulic relation between the upper weathering fissure water and the lower structural fissure water, the source of tunnel water gushing and its mixing ratio; A series of problems, such as hydrogeological significance of faults, have been studied on hydrogeochemical characteristics and hydrochemical formation of groundwater in the study area, environmental isotopic characteristics such as 未 D, 未 18O and 3H of fissured groundwater in the study area. Related hydrogeological problems such as the recharge source of F29 fault water, the recharge height, the contribution of different flow systems to the tunnel water inflow and the potential water inflow, etc., provide isotopic hydrogeochemical evidence. It is proved by practice that the combination of environmental isotope and hydrogeochemistry has a strong tracer effect on solving the seepage problem of tunnel and can be widely used in water conservancy engineering tunnel seepage and related hydrogeological problems.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV223.4
【参考文献】
相关期刊论文 前1条
1 尹观,倪师军;地下水氘过量参数的演化[J];矿物岩石地球化学通报;2001年04期
，本文编号：2319772
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