摘要
根据差异性地面沉降是引发地裂缝的基本原理对光明村地裂缝进行了实证。通过对地质构造和水文地质条件分析比较,认为该地裂缝与江阴南部地裂缝同属一条地裂缝带,在发生的时空关系上具有高相关性。地下水超采是产生地裂缝的主要原因,光明村与地下水位埋深超过40m的河塘镇存在密切的水力联系。近期的实测数据表明,光明村地裂缝仍处于活动中,最大差异沉降量达5mm/a。光明村地裂缝的稳定与否主要取决于江阴南部水文地质条件的改善程度。
It was well acknowledged that non-uniform land subsidence led to earth fissures, and this principle also adapted to Guang-ruing Village. Through analyses and contrast of geological structures and hydrogeological conditions, the authors found that the earth fis- sures in the study area belonged to a same earth fissure belt with that in southern Jiangyin County, both shared similar geological set- tings and high correlation in spatial and temporal dimension. Earth fissures and land subsidence were caused by excessive exploitation of groundwater, closely hydrodynamic connection of groundwater existed between Guangming Village and Hetang Town where the depth of groundwater level was over 40 m. Some monitoring data indicated that the earth fissure were still active with a biggest annual difference settlement reached 5 ram. it was concluded that the stability of earth fissures in Guangming Village depended on the recovery of hydro- geological condition in southern Jianyin County.
出处
《地质学刊》
CAS
2013年第2期203-207,共5页
Journal of Geology
基金
中国地质调查局项目"苏锡常地区禁采地下水的地质环境效应分析"(1212010741105)
中国地质调查局项目"苏锡常地区地面沉降监测与风险管理"(1212010641202)
关键词
地面沉降
地裂缝
地下水
地质灾害
江苏无锡
Land subsidence
Earth fissures
Groundwater
Geological disaster
Wuxi City
Jiangsu
