【摘要】 土石坝是由饱和与非饱和渗流区组成的统一体,渗流问题是影响土石坝运行安全的关键因素之一.土水特征曲线(SWCC)是非饱和渗流数值模拟的重要基础.浙江省土石坝众多,对其填筑土持水性研究具有重要意义.确定一个合适的模型来描述填筑土的SWCC是研究的基础.通过压力板仪,对3种浙江省土石坝典型填筑土进行持水试验,选取VG、FX和MX模型对试验数据进行拟合,并对拟合结果进行分析.结果表明,VG模型并不适用于土石坝填筑土,FX和MK模型均取得了较好的效果,FX模型在适用性和普遍性上更好.更多还原

【Abstract】 Earth-rockfill dams are a unity of saturated and unsaturated seepage zones. Seepage is thus a key factor for the sound operation of earth-rockfill dams. Soil-water Characteristic Curve(SWCC)is an important basis to simulate unsaturated seepage zones. With a large number of earth-rockfill dams in Zhejiang Province,it is significant to study the water retention capability of the filling soil. Firstly,it is necessary to find a suitable model to describe the SWCC of the filling soil. In this paper,water retention tests were conducted via pressure plate instrument on three typical filling soils for earth-rockfill dams in Zhejiang. VG,FX and MX Models were adopted in fitting the experimental data. The analysis on fitting results suggest that the VG Model was not suitable for earth-rockfill dams,while the FX and MX Models achieved preferable effects,and FX Model excelled at applicability and universality.更多还原