| 郑州地下水均衡试验场的改建工程——试验介质的选择与试验土柱建造 |
| |
| 引用本文： | 宋高举,王帅,李俊亭,黄继超,张公,王继华,王琳.郑州地下水均衡试验场的改建工程——试验介质的选择与试验土柱建造[J].水文地质工程地质,2019,0(6):19-25. |
| |
| 作者姓名： | 宋高举 王帅 李俊亭 黄继超 张公 王继华 王琳 |
| |
| 作者单位： | 1.河南省地质矿产勘查开发局第二地质环境调查院，河南 郑州450053；2. 长安大学环境科学与工程学院，陕西 西安710054；3. 干旱区地下水文与生态效应教育部重点实验室，陕西 西安 710054；4.河南省地质环境览测院，河南 郑州450016 |
| |
| 摘 要： | 郑州地下水均衡试验场的改建，是中国地质环境监测院主持的国家地下水监测工程中地下水均衡试验场的改建项目之一。在均衡试验场的改建中试验土柱构建是一个核心问题，涉及到两个方面:试验介质的选择与试验筒装填。据河南省地质地貌特征，分为五地貌单元:黄河北冲积平原、黄河南冲积平原、淮河冲积平原、南阳盆地、豫西黄土丘陵。结合野外调查，概化出了五个地貌单元的岩性与不同岩层的叠置关系，并通过典型地段勘查对岩性及结构的代表性进行论证，以此确定五分区各类岩性的采样地点，为试验土柱构建奠定了地质基础。试验筒的总长达90 m，按设计要求将试验土样装入试验筒。制定小柱体模拟沉降试验，求得按设计要求装填土样之沉降系数，作为试验土样装填试验筒厚度的计算依据。试验土柱装填完成后，对其进行沉降观测，确认沉降趋稳且不影响试验土柱传感器安装时，试验柱才算构建完成。郑州地下水均衡试验场改建共建造25个试验柱，试验柱的高度分别包含1 m、2 m、3 m、5 m、7 m等五个不同高度，每个高度又包含黄河北冲积平原、黄河南冲积平原、淮河冲积平原、豫西黄土丘陵、南阳盆地等五个区域包气带。
|
| 关 键 词： | 包气带岩性 试验土柱 模拟沉降试验 |
| 收稿时间： | 2019-05-18 |
| 修稿时间： | 2019-07-10 |
Reconstruction project of groundwater balance experiment site of Zhengzhou:selection of test media and construction of test soil columns |
| |
| SONG Gaoju,WANG Shuai,LI Junting,HUANG Jichao,ZHANG Gong,WANG Jihua,WANG Lin.Reconstruction project of groundwater balance experiment site of Zhengzhou:selection of test media and construction of test soil columns[J].Hydrogeology and Engineering Geology,2019,0(6):19-25. |
| |
| Authors: | SONG Gaoju WANG Shuai LI Junting HUANG Jichao ZHANG Gong WANG Jihua WANG Lin |
| |
| Affiliation: | 1.No.2 Institute of Geological & Mineral Resources Survey of Henan Geo-environmental Monitoring Institute of Henan Province，Zhengzhou, Henan450016, China;2.School of Environmental Science and Engineering, Chang’an University,Xi’an, Shaanxi710054, China; 3.Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education(Chang’an University), Xi’an, Shaanxi710054,China;4.Geo-enviromental Monitoring Znstitute of Henan Province, Zhengzhou, Henan 450016, China |
| |
| Abstract: | The rebuilding of Zhengzhou Groundwater Balance Test Site is one of the rebuilding projects of the Groundwater Balance Test Site in the National Groundwater Monitoring Project sponsored by Geological Environment Monitoring Institute of China. The construction of the testing column in the reconstruction of the balance experiment site is a core issue mainly including two aspects: the selection of the testing medium and the filling of the testing cylinder. According to the geological and geomorphic characteristics of Henan Province, Henan Province is divided into five geomorphic units:the alluvial plain north of the Yellow River, the alluvial plain south of the Yellow River, the alluvial plain of the Huaihe River, the Nanyang Basin, and the loess hills of western Henan. Combining with field investigation, the relationship between lithology of five geomorphic units and superimposition of different strata is generalized, and the representative of lithology and structure is demonstrated through typical section exploration, so as to determine the sampling sites of various lithologies in five zones and lay a geological foundation for the construction of test soil pillars. The total length of the test cylinder is 90 meters, and the soil samples are loaded into the test cylinder according to the design requirements. For this reason, a small column simulation settlement test is formulated, and the settlement coefficient of filling soil sample according to the design requirements is obtained, which serves as the basis for calculating the thickness of testing soil sample filling test cylinder.After the loading of the test soil column is completed, the settlement observation is carried out to confirm that the settlement tends to be stable and does not affect the installation of the sensor for the test soil column, and the construction of the test column is completed. |
| |
| Keywords: | |
|
| 点击此处可从《水文地质工程地质》浏览原始摘要信息 |
|
点击此处可从《水文地质工程地质》下载全文 |
|
