过度开采地下水导致土壤变形的实验研究。

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Water Environment Research Pub Date : 2024-09-01 DOI:10.1002/wer.11111
Lin Sun, Xiuyan Wang, Shuaiwei Wang, Weichao Sun, Jingjing Wang, He Di
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引用次数: 0

摘要

由于过度开采深层地下水,华北平原形成了世界上最大的洼地锥体。这导致了严重的地质灾害,包括地面沉降和地裂缝,也造成了经济损失。沉陷的防治需要依靠对沉陷量的准确预测。根据一维固结理论和有效应力原理,结合地层结构、地下水流向、应力分布等因素,采用 569.6 米深钻孔土样的高压固结试验结果,重点研究地下水开采条件下的应力和变形参数,建立了地下水位下降深度与土地沉陷的水土耦合预测模型。通过与研究地点附近的沉降实测数据进行验证,结果表明预测曲线与实测曲线一致,两者之间的差异可以接受。该模型可根据不同地区的地层结构进行调整后应用于不同地区。其主要优势在于能够为缺乏监测数据的地区提供土地沉降预测,因此具有很高的推广应用价值。实践点:可压缩地层结构是土地沉陷的内因。地下水位下降导致土体应力变化。这是土地沉陷的外部因素。以一维固结理论为基础,结合地层结构、地下水流和应力分布,建立地面沉降预测模型。
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Experimental study on soil deformation caused by overexploitation of groundwater.

Due to the overexploitation of deep groundwater, the largest cone of depression in the world has formed in the North China Plain. This led to severe geological hazards, including land subsidence and ground fissures, and also caused economic losses. The prevention and treatment of subsidence needs to rely on the accurate prediction of subsidence amount. According to the one-dimensional consolidation theory and effective stress principle, combined with stratum structure, groundwater flow, stress distribution, and so forth, the high-pressure consolidation test results of 569.6 m deep borehole soil samples are adopted; with a specific focus on stress and deformation parameters under exploitation of groundwater condition, the soil-water coupling prediction model of groundwater level lowering depth and land subsidence has been established. Verification with measured subsidence data near the study sites demonstrated that the predicted curve is consistent with the measured one and the differences between them are acceptable. The model can be applied in different areas after making adjustment based on different regional stratigraphic structures. Its key advantage lies in the ability to provide land subsidence prediction for areas lacking monitoring data, making it highly valuable for widespread application. PRACTITIONER POINTS: There is a compressible stratum structure; it is the internal factors of land subsidence. The groundwater level decline causes the soil body stress to change. It is land subsidence of the external factors. Based on the one-dimensional consolidation theory and by combining stratigraphic structures, groundwater flow, and stress distribution, a ground settlement prediction model was established.

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来源期刊
Water Environment Research
Water Environment Research 环境科学-工程:环境
CiteScore
6.30
自引率
0.00%
发文量
138
审稿时长
11 months
期刊介绍: Published since 1928, Water Environment Research (WER) is an international multidisciplinary water resource management journal for the dissemination of fundamental and applied research in all scientific and technical areas related to water quality and resource recovery. WER''s goal is to foster communication and interdisciplinary research between water sciences and related fields such as environmental toxicology, agriculture, public and occupational health, microbiology, and ecology. In addition to original research articles, short communications, case studies, reviews, and perspectives are encouraged.
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