| 天津滨海新区地面沉降层位的精准识别与沉降过程重建 |
| |
| 引用本文： | 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. |
| |
| 作者姓名： | 李红 肖国强 杨吉龙 赵长荣 肖艺 |
| |
| 作者单位： | 1. 中国地质调查局天津地质调查中心, 天津 300170;2. 中国地质调查局泥质海岸带地质环境重点实验室, 天津 300170;3. 天津市地质调查研究院, 天津 300191 |
| |
| 基金项目： | 中国地质调查局项目（编号：1212010814004） |
| |
| 摘 要： | 塘沽地区地面沉降是新生代松散沉积物多层位沉降叠加的结果,精准识别各层位的沉降贡献是该区地面沉降防控的关键。利用塘沽G2地面沉降分层标组2011—2014年观测数据,对新生代沉积物不同层位的地面沉降进行了精准识别;结合以前的分层标观测资料,重建了1960年以来不同层位的地面沉降过程。结果显示,在1960—1970年地下水开发初期,地面沉降主要层位是浅部粘性土自然固结和第二含水组地下水开采;1970—1980年深层地下水开采高峰期,主沉降层位由二组逐渐加深到三、四组;1985年以后实施了地面沉降控制措施后,第四系地下水开采引起的地面沉降逐渐减小;2000年之后,随着滨海新区的成立和大规模的城市建设,城市建设引起的建筑基础沉降逐渐成为主要的沉降层。通过对不同时期主要地面沉降层位的转换过程分析,提出地面沉降精准防治新思路。
|
| 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 |
| 收稿时间： | 2016/5/19 0:00:00 |
| 修稿时间： | 2016/8/22 0:00:00 |
Precise identification of land-subsiding layers and reconstruction of subsid-ence process in Tianjin Binhai New Area |
| |
| LI Hong,XIAO Guoqiang,YANG Jilong,ZHAO Changrong and XIAO Yi.Precise identification of land-subsiding layers and reconstruction of subsid-ence process in Tianjin Binhai New Area[J].Geologcal Bulletin OF China,2016,35(10):1646-1652. |
| |
| Authors: | LI Hong XIAO Guoqiang YANG Jilong ZHAO Changrong and XIAO Yi |
| |
| Institution: | 1. Tianjin Center, China Geological Survey, Tianjin 300170, China;2. CGS Key Laboratory of Muddy Coast Geo-environment, Tianjin 300170, China;3. Tianjin Institute of Geological Survey, Tianjin 300191, China |
| |
| Abstract: | Land subsidence of Tanggu results from multi-layers subsidence of Cenozoic unconsolidated sediments, so accurate identification 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 subsidence 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 mining peak of 1970~1980, the main subsidence layers gradually deepened from two groups into three or four groups; after the beginning 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 subsidence caused by building foundation of urban construction has gradually become a major subsidence layer. In this paper, a new thinking for precise land subsidence prevention and control is proposed on the basis of the analysis of major land subsidence layers during different periods. |
| |
| Keywords: | land subsidence subsiding layers precise identification process reconstruction Tianjin Binhai New Area |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地质通报》浏览原始摘要信息 |
| 点击此处可从《地质通报》下载免费的PDF全文 |
|
