地质通报2016，Vol.35Issue(10)：1646-1652,7.
天津滨海新区地面沉降层位的精准识别与沉降过程重建
Precise identification of land-subsiding layers and reconstruction of subsid-ence process in Tianjin Binhai New Area
摘要
Abstract
Land subsidence of Tanggu results from multi-layers subsidence of Cenozoic unconsolidated sediments, so accurate iden⁃tification of each layer ’s contribution is s key problem for the prevention and control of land subsidence. In this paper, based on the land subsidence monitoring data of Tanggu G2 borehole extensometer during 2011~2014, the authors identified land subsid⁃ence of different layers of Cenozoic sediments precisely. Combined with previous data, the land subsidence process since 1960s was reconstructed, and the result shows that during the early stage groundwater mining of 1960~1970, land subsidence resulted mainly from shallow clayey soil layers of natural consolidation and second aquifer groundwater exploitation;during deep groundwater min⁃ing peak of 1970~1980, the main subsidence layers gradually deepened from two groups into three or four groups; after the begin⁃ning of the land subsidence control measures in 1985, land subsidence caused by Quaternary groundwater exploitation decreased;from 2000 to the present, with the establishment of Tianjin Binhai New Area and large-scale urban construction, the land subsid⁃ence caused by building foundation of urban construction has gradually become a major subsidence layer. In this paper, a newthinking for precise land subsidence prevention and control is proposed on the basis of the analysis of major land subsidence layers during different periods.关键词
地面沉降/沉降层位/精准识别/过程重建/天津滨海新区Key words
land subsidence/subsiding layers/precise identification/process reconstruction/Tianjin Binhai New Area分类
天文与地球科学引用本文复制引用
李红,肖国强,杨吉龙,赵长荣,肖艺..天津滨海新区地面沉降层位的精准识别与沉降过程重建[J].地质通报,2016,35(10):1646-1652,7.基金项目
中国地质调查局项目 （）
