粤东典型区地面沉降时空演化特征及成因分析  

Spatial-temporal Evolution Characteristics and Causes of Land Subsidence in Typical Area of Eastern Guangdong Province

作　　者：施凤春 唐仲华[1] 陈育斌 朱奋 叶珊 SHI Fengchun;TANG Zhonghua;CHEN Yubin;ZHU Fen;YE Shan(School of Environmental Studies ,China University of Geosciences (Wuhan),Wuhan 430074,China;Guangdong Geological Environment Monitoring Station ,Guangzhou 510510, China;Guangdong Environmental Monitoring Center ,Guangzhou 510308, China)

机构地区：[1]中国地质大学(武汉)环境学院,湖北武汉430074 [2]广东省地质环境监测总站,广东广州510510 [3]广东省环境监测中心,广东广州510308

出　　处：《安全与环境工程》2019年第5期8-16,共9页Safety and Environmental Engineering

基　　金：广东省国土资源科研专项项目(GDGTKJ2017004)

摘　　要：粤东地区谷饶镇的地面沉降发展时间长、规模大,但是无地面沉降的监测数据,给该地区地面沉降的定性评价带来困难。采用InSAR测量技术,获取了研究区2015—2018年间的地表变形数据,采用克里金方法和空间叠加分析研究了该地区地面沉降的时空演化规律及其影响因素。结果表明:研究区地面沉降速率基本呈减小趋势,整体上呈现持续变形的特征;引起研究区地面沉降的物质条件主要是岩土体松散与土质不均;研究区第四系地层在垂向上主要分为两层压缩土层组,尽管第一压缩土层厚度小于第二压缩土层,但其工程力学性质差,其影响不能忽略;建筑荷载和地下水开采是引起研究区地面沉降的两个重要因素,而造成研究区严重地面沉降及不均匀地面沉降的主要原因是大量开采地下水。The land subsidence of Gurao Town in eastern Guangdong Province has a long development time and a large scale,but there is no monitoring data of land subsidence,which brings difficulties to the qualitative evaluation of land subsidence in this area.This paper uses InSAR measurement technology to obtain surface deformation data from 2015 to 2018 in the study area,using Kriging method and spatial superposition analysis to study the temporal and spatial evolution rules and influence factors of land subsidence.The results indicate that the whole study area is characterized by continuous deformation with a decreasing trend of the subsidence rate.The material conditions causing land subsidence is loose heterogeneous soil.In the vertical direction,the Quaternary of the study area is mainly divided into two compression layers,the thickness of the first compression layer is less than that of the second compression layer,but its engineering mechanical properties are poor,and its influence cannot be ignored.Building loads and groundwater exploitation are two important factors that cause land subsidence,however,the main cause of severe land subsidence and uneven settlement is the massive exploitation of groundwater.

关 键 词：地面沉降 地下水开采 时空演化 影响因素 粤东典型区 

分 类 号：X141[环境科学与工程—环境科学] P642.26[天文地球—工程地质学]