《Journal of Geotechnical & Geoenvironmental Engineering》刊登

“修建在各向异性多相土体上的水工建筑物的渗透性随机性分析”

作者：Ahmed, Ashraf A.

刊物：《Journal of Geotechnical & Geoenvironmental Engineering 》，2013年6月，第139卷第6期，1001-1004页

关键词：各向异性；多相性；水工建筑物；Monte Carlo法；概率法；概率；渗透；随机过程

摘要：本文研究了水工建筑物下各向异性多相多空介质中的承压流。土体的渗透性被模拟为一个服从对数正态分布的空间随机场。研究结果表明，比较大的各向异性多相比（水平波动大小和垂直波动大小的比值）可以使渗透流量显著增加。当变异系数较大时，这种渗流的增加更加明显。在扬压力的情况中也可以观察到相似的趋势，但其对各向异性多相比的增加不太敏感。此外，渗流和扬压力都随各向异性多相比的增加趋于特定值。研究结果还表明，出口处的水力梯度在各向异性多相比的特定值处达到其最大值。

Stochastic Analysis of Seepage under Hydraulic Structures Resting on Anisotropic Heterogeneous Soils

Authors：Ahmed, Ashraf A.

Journal：Journal of Geotechnical & Geoenvironmental Engineering. Jun2013, Vol. 139 Issue 6, p1001-1004.

Key Word：Anisotropy；Heterogeneity；Hydraulic structures；Monte Carlo method；Probabilistic methods；Probability；Seepage；Stochastic processes

Abstract：This research investigated the confined flow under hydraulic structures. The hydraulic conductivity of the soil was modeled as a spatially random field, which followed a lognormal distribution. Only porous media that have anisotropic heterogeneity were investigated. Results showed that larger anisotropic heterogeneity ratios (the ratio of horizontal to vertical scale of fluctuation) dramatically increased the seepage flow. This increase of flow was more pronounced at larger coefficients of variations. A similar trend was observed in the case of uplift force, although it was less sensitive to the increase in the anisotropic heterogeneity ratio. Moreover, both the seepage flow and the uplift force tended to their deterministic values as the ratio of anisotropic heterogeneity increased. Results also showed that the exit hydraulic gradient attained its greatest value at particular values of the anisotropic heterogeneity ratio.

原文链接：https://vpn2.nlc.gov.cn/prx/000/http/web.ebscohost.com/ehost/detail?vid=4&sid=2f72eef7-a31b-44f5-b5c7-3af1f0f0cd4e%40sessionmgr111&hid=117&bdata=Jmxhbmc9emgtY24mc2l0ZT1laG9zdC1saXZl#db=a9h&AN=86859587