潜水含水层非稳定井流降水有限差分分析.pdf

2010 年2 月 水运工程 Feb. 2010 第2 期 总第438 期 Port Waterway Engineering No. 2 Serial No. 438 潜水含水层非稳定井流降水的有限差分分析 刘 嘉，张功新，罗 彦，董志良 （中交四航工程研究院有限公司，广东广州510230） 摘要：滨海地区利用吹填淤泥或砂围海造陆将在地基上部形成一潜水含水层，但现有方法大都依赖于Theis 非稳定承压 含水层井流理论求解水文地质参数，进行降水设计，缺乏合理性。结合广州港南沙港区粮食及通用码头软基试验区科研项 目，利用Neuman 非稳定井流理论进行潜水含水层水文地质求参，将所得参数进行有限差分分析，数值结果与水位监测成果 一致。工程实例表明，该方法合理、可靠，为类似应用提供了一种新途径。 关键词：非稳定；潜水含水层；水文地质参数；降水；有限差分 + 中图分类号：U 655.54 3 文献标志码：A 文章编号：1002-4972 （2010）02-0070-05 Finite-difference analysis of unsteady well flow at unconfined aquifer LIU Jia, ZHANG Gong-xin, LUO Yan, DONG Zhi-liang (CCCC Sihang Engineering Research Institute Co., Ltd., Guangzhou 510230, China) Abstract: In the coastal area, an unconfined aquifer will be formed on the upper part of the foundation by dredging and filling silts or sands to reclaim land, but the most existing methods are relying on the Theis, a well flow theory of non-steady confined aquifer to solve the hydro-geological parameters and conduct precipitation design that is lack of rationality. By applying the Neuman unsteady well flow theory to derive the hydro - geological parameters of unconfined aquifer and then using the finite-difference method to analyze all derived parameters, the resulted values are consistent with the water level monitored results. The engineering examples show that this method is reasonable and reliable, and provides a way for the similar applications. Key words: non-steady; unconfined aquifer; hydro-geological parameters; precipit