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Numerical and experimental modelling of slope stability and seepage water of earthfill dam

El-Hazek Alaa N., Abdel-Mageed Neveen B., Hadid Mohammed H.

Journal of Water and Land Development

2020

no. 44

55--64

In this paper, finite element modelling is employed for simulating and analysing seepage and slope stability of earthfill dam via GeoStudio software. Two products are employed, which are SLOPE/W for slope stability and SEEP/W for seepage analysis. The behaviour of earthfill dam with four different types of sandy soils having different values of hydraulic conductivity (K) has been studied. Different upstream (US) slopes of 1:2, 1:2.5, 1:3 and 1:3.5 for the earthfill dam are simulated. The downstream (DS) slope is constant at 1:2. The results showed for all the four types of soils that when the US slope is increased, the amount of seepage from the dam increases and the factor of safety (F) decreases. For each US slope, when K (type of soil) increases, both seepage and F increase. Fine sand soil is associated with less seepage and less F. Sixteen equations are obtained to predict both seepage and F with respect to US slope for each type of soil and K of the soil for US slope. An experimental model for earthfill dam is constructed in the laboratory of hydraulics, Benha University to investigate the seepage of water through earthfill dams. It is concluded that seepage decreased when K decreased, and when the US slope for each type of soil decreased. The seepage increased when K increased for each US slope. Seven equations are obtained to predict seepage with respect to US slope for each type of soil, and K for each US slope.

Przegląd komputerowych programów inżynierskich do obliczeń geotechnicznych

Bodziuch M.

Inżynieria Morska i Geotechnika

2015

nr 3

305--310

Porównanie trzech programów powszechnie stosowanych w projektowaniu geotechnicznym: Plaxis, Z _Soil oraz GeoStudio. Ich ocena pod względem możliwości modelowania konstrukcji oraz prostoty i intuicyjności użycia. Porównanie szybkości wprowadzenia modelu do programu oraz relację między stopniem złożoności modelu i prędkością obliczeń. Porównanie programów zilustrowano prostym przykładem analizy oddziaływania stopy fundamentowej na uwar-stwiony grunt. Wnioski wynikające z przeprowadzonych analiz.

The comparison of software commonly used in geotechnical calculations: Plaxis, Z_Soil and GeoStudio. Their evaluation in terms of modelling procedures concerning the ground and structures as well as simplicity and intuitiveness of use. A comparison of the speed of inputting model into the program and the relation between complexity of the model and the speed of calculation on the basis of a simple analysis of the footing situated on the layered ground. Some final conclusions resulting from the analyses.