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摘要: 以江苏海门地区水文地质和工程地质资料为基础,文章通过野外实地调查,结合相关文献资料,对该区近年来地面沉降发展历程进行了系统整理,分析了地面沉降的发展特征和分布规律,进而探讨地面沉降形成的原因。研究结果表明:海门地区早期第Ⅲ承压含水层地下水过度开采,导致全区整体发生沉降;但随着地下水计划开采的实施(2013年以后),沉降区域由全区转为局部,主要发生在软土分布与建筑荷载密集地区,主压缩层是潜水含水层、第Ⅰ黏性土弱透水层以及第Ⅰ承压含水层。区内软土分布与地面沉降关系密切,建筑荷载密集地区与地面沉降频发地区呈高度相关性,即软土分布与建筑荷载是目前地面沉降的影响因素。Abstract: Based on the hydrogeological and engineering geological data of Haimen area in Jiangsu Province, through field investigation and relevant literature, the development process of land subsidence in this area in recent years has been systematically sorted out. The subsidence genesis were explored by analyzing the development characteristics and distribution law of land subsidence. The results show that the groundwater in the confined aquifer Ⅲ in Haimen area was over-exploited in the early stage, leading to overall subsidence of the area. However, with the implementation of planned extraction of groundwater, the subsidence area has changed from the whole to part the local, focusing in the areas with soft soil distribution and dense building load. The main compression layers are the phreatic aquifer, the first cohesive soil aquitard and the first confined aquifer. The distribution of soft soil in the area is closely related to land subsidence, and the area with dense building load is highly correlated with the area of frequent land subsidence, that is, the distribution of soft soil and building load are the influencing factors of land subsidence.
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Key words:
- Haimen area of Jiangsu Province /
- land subsidence /
- soft soil /
- groundwater /
- building load
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