岩溶区线性工程影响下的地下水监测及数值模拟研究——以广州市金沙洲为例

以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型。模拟结果表明:(1)高铁金沙洲隧道施工降水是引起金沙洲地下水流场变化的主要原因,高铁隧道施工大量抽排地下水时,地下水位变化形成以抽水点为中心的降落漏斗;(2)随着抽水量的加大,形成水位下降漏斗及地下水强径流排泄带,加速地下水对泥沙的搬运动力,增大对岩土体结构的冲刷作用,使与岩溶管道连通的土洞及覆盖层稳定性受到破坏,从而导致地面塌陷的发生;(3)随着地下水水位的下降,金沙洲一带的软弱淤泥土容易出现排水固结沉降和失托沉降,从而产生地面沉降灾害。...

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Published in中国岩溶 Vol. 35; no. 6; pp. 657 - 666
Main Author 郑小战 郭宇 戴建玲 陈小月 黄健民
Format Journal Article
LanguageChinese
Published 广州市地质调查院,广州510440%中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西桂林,541004%广州市地质调查院,广州,510440 2016
中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西桂林541004
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ISSN1001-4810
DOI10.11932/karst20160607

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Abstract 以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型。模拟结果表明:(1)高铁金沙洲隧道施工降水是引起金沙洲地下水流场变化的主要原因,高铁隧道施工大量抽排地下水时,地下水位变化形成以抽水点为中心的降落漏斗;(2)随着抽水量的加大,形成水位下降漏斗及地下水强径流排泄带,加速地下水对泥沙的搬运动力,增大对岩土体结构的冲刷作用,使与岩溶管道连通的土洞及覆盖层稳定性受到破坏,从而导致地面塌陷的发生;(3)随着地下水水位的下降,金沙洲一带的软弱淤泥土容易出现排水固结沉降和失托沉降,从而产生地面沉降灾害。
AbstractList P642.2%X141; 以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型.模拟结果表明:(1)高铁金沙洲隧道施工降水是引起金沙洲地下水流场变化的主要原因,高铁隧道施工大量抽排地下水时,地下水位变化形成以抽水点为中心的降落漏斗;(2)随着抽水量的加大,形成水位下降漏斗及地下水强径流排泄带,加速地下水对泥沙的搬运动力,增大对岩土体结构的冲刷作用,使与岩溶管道连通的土洞及覆盖层稳定性受到破坏,从而导致地面塌陷的发生;(3)随着地下水水位的下降,金沙洲一带的软弱淤泥土容易出现排水固结沉降和失托沉降,从而产生地面沉降灾害.
以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型。模拟结果表明:(1)高铁金沙洲隧道施工降水是引起金沙洲地下水流场变化的主要原因,高铁隧道施工大量抽排地下水时,地下水位变化形成以抽水点为中心的降落漏斗;(2)随着抽水量的加大,形成水位下降漏斗及地下水强径流排泄带,加速地下水对泥沙的搬运动力,增大对岩土体结构的冲刷作用,使与岩溶管道连通的土洞及覆盖层稳定性受到破坏,从而导致地面塌陷的发生;(3)随着地下水水位的下降,金沙洲一带的软弱淤泥土容易出现排水固结沉降和失托沉降,从而产生地面沉降灾害。
Abstract_FL This paper establishes a conceptual model of the groundwater system by generalizing the hydrogeological conditions,and then builds a numerical simulation model of groundwater flow in the study area based on FEFLOW.The simulation shows that groundwater flows to the center from the surroundings during the construction of pumping,and forms a depression cone.The simulation results areconsistent with the geological disasters both in time and space.According to the study results,the pumping intensity should be strictly controlled in the Jinshazhou to prevent ground collapse and ground subsidence.
Author 郑小战 郭宇 戴建玲 陈小月 黄健民
AuthorAffiliation 中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西桂林541004 广州市地质调查院,广州510440
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Author_FL GUO Yu
ZHENG Xiaozhan
DAI Jianling
CHEN Xiaoyue
HUANG Jianmin
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DocumentTitleAlternate Groundwater monitoring and numerical engineering in karst areas: A case study simulation under the influence of linear of the Jinshazhou area, Guangzhou City
DocumentTitle_FL Groundwater monitoring and numerical simulation under the influence of linear engineering in karst areas: A case study of the Jinshazhou area, Guangzhou City
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Issue 6
Keywords 岩溶塌陷
Jinshazhou
地下水
karst collapse
金沙洲
groundwater
数值模拟
numerical simulation
Language Chinese
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Notes 45-1157/P
ZHENG Xiaozhan1,2 ,GUO Yu1,2 ,DAI Jianling1 ,CHEN Xiaoyue2 , HUANG Jianmin2 (1. Institute of Karst Geology, CAGS/Key Laboratory of Karst Collapse Prevention ,CAGS & GZAR ,Guilin, Guangxi 541004, China; 2. Guangzhou Indtitute of Geological Survey, Guangzhou, Guangdong 510440, China)
karst collapse, groundwater, Jinshazhou, numerical simulation
This paper establishes a conceptual model of the groundwater system by generalizing the hydro- geological conditions, and then builds a numerical simulation model of groundwater flow in the study area based on FEFLOW. The simulation shows that groundwater flows to the center from the surroundings dur- ing the construction of pumping, and forms a depression cone. The simulation results areconsistent with the geological disasters both in time and space. According to the study results, the pumping intensity should be strictly controlled in the Jinshazhou to prevent ground collapse and ground subsidence.
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PublicationTitle 中国岩溶
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Publisher 广州市地质调查院,广州510440%中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西桂林,541004%广州市地质调查院,广州,510440
中国地质科学院岩溶地质研究所/中国地质科学院岩溶塌陷防治重点实验室,广西桂林541004
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Snippet 以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型。模拟结果表明:(1)高铁金...
P642.2%X141; 以广州市金沙洲地区的水文地质条件及地下水位监测结果为基础,应用地下水数值模拟FEFLOW软件建立了金沙洲地区的地下水系统的数值计算模拟模型.模拟结果表...
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SubjectTerms 地下水
岩溶塌陷
数值模拟
金沙洲
Title 岩溶区线性工程影响下的地下水监测及数值模拟研究——以广州市金沙洲为例
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