基于植被需求的山岭隧道排水量确定方法与限排标准研究

发布时间：2018-02-27 05:14

本文关键词： 地下水山岭隧道植被需求涌水量排水量限排标准　出处：《江西理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：近些年,人们越来越重视隧道工程与隧址区周边环境的和谐。在隧道工程的建设过程中,隧道工程与隧址区生态环境(地下水环境、植被生态环境、居民居住环境)的矛盾日益突出,因为隧道的开挖导致地下水的疏干,从而破坏隧址区生态环境,影响工程的案例不在少数。所以如何确定适宜的排水量与制定一个符合大部分山岭隧道工程的地下水限排标准,在隧道工程中是一个迫切的问题。本文以山岭隧道为研究对象,使用文献调研和现场调查等方法,分析地下水的主要类型及其与隧道的相互影响、隧道涌水量现有预测方法及其优缺点和适用条件;同时以理论分析与计算为主要手段,采用地下水动力学方法对隧道涌水量进行预测;接着借鉴地下水动力学的面井理论,从植被需求的角度出发,确定山岭隧道排水量;最后根据计算得到的涌水量、山岭隧道排水量,选取山岭隧道常见的计算参数范围值,确定适用于大多数的山岭隧道地下水限排标准。主要研究内容如下:(1)通过归纳现有隧道涌水量的预测方法,并依据工程实际经验,论述各种涌水量预测方法的优缺点和应用范围,提出本文采用的隧道涌水量预测方法。(2)从植被需求的角度,借鉴地下水动力学中的面井理论,得出隧道地下水位降深与时间、排水量的关系,通过对地下水总排放量和与降雨入渗补给为主的地下水总补给量进行平衡分析,提出保持地下水平衡的隧道排水量确定方法。(3)选取南方大部分地区常见的岩土体渗透系数、给水度及地下水头高度等参数范围值,基于生态平衡,确定了符合大多数山岭隧道的地下水限排标准;提出涌水量过大无法有效控制情况下隧道限排量的确定方法。
[Abstract]:In recent years, more and more attention has been paid to the harmony between tunnel engineering and the surrounding environment of tunnel site. In the process of tunnel construction, tunnel engineering and tunnel area ecological environment (groundwater environment, vegetation ecological environment), The contradiction between the residents' living environment) is becoming more and more serious, because the excavation of the tunnel leads to the drainage of groundwater, thus destroying the ecological environment of the tunnel site. There are many cases affecting the project. Therefore, how to determine the appropriate displacement and establish a standard of groundwater discharge in accordance with most mountain tunnel projects is an urgent problem in the tunnel engineering. This paper takes the mountain tunnel as the research object. In this paper, the main types of groundwater and its interaction with tunnels, the existing forecasting methods of tunnel discharge and their advantages, disadvantages and applicable conditions are analyzed by means of literature investigation and field investigation, and the theoretical analysis and calculation are taken as the main means. The groundwater dynamic method is used to predict the tunnel discharge, and the drainage capacity of the mountain tunnel is determined from the view of vegetation demand by using the surface well theory of groundwater dynamics for reference. In order to determine the standard of groundwater discharge for most mountain tunnels, the drainage capacity of mountain tunnels is determined by selecting the range values of common calculation parameters of mountain tunnels. The main research contents are as follows: 1) by summing up the existing prediction methods of tunnel discharge, Based on the practical engineering experience, this paper discusses the advantages and disadvantages and application scope of various water inflow forecasting methods, and puts forward the tunnel water discharge forecasting method .Y2) from the point of view of vegetation demand, drawing lessons from the surface well theory in groundwater dynamics. The relationship between the depth of the tunnel groundwater level and the time and displacement is obtained. Through the balance analysis of the total discharge of groundwater and the total recharge of groundwater with rainfall infiltration recharge, This paper puts forward the method of determining the drainage volume of tunnel to keep the groundwater balance. (3) selecting the parameters of permeability coefficient, water supply degree and groundwater head height of rock and soil, which are common in most areas of southern China, based on ecological balance. The limited discharge standard of groundwater in most mountain tunnels is determined, and the method of determining the limited discharge of tunnel under the condition that the inflow of water is too large can not be effectively controlled is put forward.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U453.6

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