摘要
地面沉降是一种缓慢发生且不可逆转的地质灾害,是城市化进程中普遍存在的环境地质问题。为了解决现有地面沉降监测网获取的沉降信息不完整、对城市地面沉降的监控不够精准等问题,需要对其进行优化。本文以南京市长江漫滩地面沉降监测网为例,利用地质统计学的区域化变量理论和变异函数理论,运用Kriging插值法对研究区地面沉降监测网分别建立变异函数模型,研究南京市长江漫滩区域各监测网标准差分布特征,并对其进行优化布设。结果表明:南京市长江漫滩区域地面沉降监测网存在分布不合理问题。进行优化布设后,淘汰冗余及边缘监测井34个,新增监测井16个;淘汰冗余及边缘水准点49个,新增水准点21个;分层沉降监测网缩减18组,新增13组。改进后的监测井网在满足精度要求的同时,能够最大程度地获取监测数据,实现了沉降监测网络的优化布置。
Ground subsidence,a slowly occurring and irreversible geological disaster,is an environmental geological problem which commonly occurs in the process of urbanization.In order to solve the problems of incomplete subsidence information obtained by the existing ground subsidence monitoring network and the lack of precision in monitoring urban ground subsidence,it needs to be optimized.In this paper,taking the ground subsidence monitoring network of Nanjing Yangtze River floodplain as an example,using the regionalized variable theory of geostatistics and the variational function theory,Kriging interpolation method is used to establish the variational function model for the ground subsidence monitoring network of the study area,and the standard deviation distribution characteristics of each monitoring network of the Yangtze River floodplain in Nanjing area are investigated for the optimization of the deployment.The results show that the ground subsidence monitoring networks in the study area has the problem of unreasonable distribution.After the optimization,34 redundant and marginal monitoring wells are eliminated and 16 new monitoring wells are added;49 redundant and marginal level points are exempted and 21 new level points are added;18 groups of stratified settlement monitoring network are eliminated and 13 groups of stratified settlement monitoring points are added.The improved monitoring well network can maximize the acquisition of monitoring data while meeting the accuracy requirements,and efficiently optimizes the arrangement of the settlement monitoring network,with reasonable results.
作者
刘刚
彭轶群
徐昊
裴江涛
骆祖江
Liu Gang;Peng Yiqun;Xu Hao;Pei Jiangtao;Luo Zujiang(The First Geological Brigade of the Bureau of Geology and Mineral Resources of Jiangsu Province,Nanjing 210041,China;School of Earth Sciences and Engineering,Hohai University,Nanjing 210024,China)
出处
《吉林大学学报(地球科学版)》
北大核心
2025年第4期1240-1255,共16页
Journal of Jilin University:Earth Science Edition
基金
江苏省地质科技创新项目(2023KY01)
国家自然科学基金项目(41874014)。
