多元结构地基抬田饱和非饱和渗流模型试验  

Experiment Study on Carrying Multiple Fields Model Test of Saturated and Unsaturated Seepage

作　　者：郝红科[1,2] 詹美礼[2] 何淑媛[2] 邵建明[2] 

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]河海大学水利水电学院,南京210098

出　　处：《灌溉排水学报》2012年第2期55-58,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(51079039;51009053)

摘　　要：结合江西峡江枢纽控制工程中的库区抬田研究课题,开展多元结构地基上抬田饱和非饱和渗流模型试验研究。结果表明,在稳定渗流条件下,防渗层内部的天然水头势随时间变化属于饱和-非饱和渗流,孔隙水压力总体较小,负压水头势在防渗层以上部分表现为随埋深增加而增大;在有地下水顶托时抬田结构渗流量稍有增加。但均符合设计规范对地基渗流的要求,用试验结果修正的三维有限元计算模型对抬田结构进行模拟计算,大量减少了试验工作量,且结果满足实际工程需要。In this paper,established multi-base foundation model to carry out field saturated-unsaturated seepage model test by the project of Xiajiang reservoir dipping.Experimental results,under the conditions of steady seepage,potential head change over time is saturated-unsaturated within the impermeable layer,pore water pressure is overall lower,potential head increase allowing depth upper impermeable layer.Multi-raising foundation seepage slightly increased in backwater of reservoir water,but still within the permissible range.The results of experiment model reduce a large number of experiments to the workload and the results meet the actual engineering.

关 键 词：多元结构 非饱和 渗流 土壤水头势 

分 类 号：TV223[水利工程—水工结构工程]