海南某临海地区潮汐作用下的地下水水位变化特征的研究

Research on Variation Characteristics of Groundwater Level under Tidal Action in a Coastal Area of Hainan Province

摘要:

结合海南三亚某基地临海地区地层地下水水位在潮汐作用下的长期观测资料，根据地下水流动规律，采用地下水一维流动的布辛奈斯克方程，研究临海地下水潜水含水层地下水水位在潮汐作用下的波动规律，并进行主要影响因素的识别与分析。分析发现，临海地区地下水水位波动主要受潮汐作用幅值大小和距离海岸远近的影响，当距离海岸超过100 m时，潮汐作用对地层地下水水位的影响可忽略。研究结果对临海地区土岩质基坑的土质边坡稳定性分析以及基坑围护设计、施工都有着重要的指导作用。

Abstract:

Combined with the long-term observation data of groundwater level under the tidal action in a coastal area of Sanya base in Hainan Province, based on the groundwater flow regularity and using the Boussinesq Equation of groundwater one-dimensional flow, the groundwater flow regularity under the tidal action in the coastal groundwater aquifer is studied. The main influencing factors are identified and analyzed. It is found that the fluctuation of groundwater level in coastal area is mainly affected by the amplitude of tidal action and the distance from the coast. When the distance is more than 100 meters from the coast, the influence of tide on groundwater level can be ignored. The research results have an important guiding role in the stability analysis on the soil slope of soil rocky foundation pit and the design and construction of foundation pit support in coastal areas.