Abstract
This paper analyzes the slope stress analysis of seepage-stress field under the condition of water lifting of reservoir slope, taking a practical reservoir slope project for example, on the basis of investigation and study of the geological environment, the soil geology model of the reservoir slope is established. On the basis of interaction calculation module of the fluid structure in the software Geo-Studio and Biot theory, finite element method of seepage-stress field coupling is applied to study the variation of stress field of the reservoir slope mainly with strong weathering argillaceous sandstone and marl, on the condition that reservoir water level rise and fall. The maximum principal stress is mainly compressive stress, the tensile stress just distributes near the top of the slope; the minimum principal stress is mainly compressive stress.
Highlights
The slope stress analysis under reservoir water level lifting, there are well established in the literature and they are commonly used in practice
The maximum principal stress is closer to the slope, the direction of the maximum principal stress is closer parallel to the slope; Fig. (4 and 5) show that: The minimum principal stress of reservoir slope varies with the position of each point of slope body, as well as mechanical properties
SEEP/W and SIGMA/W software, the conclusion can be obtained as follows: (1) Through a comprehensive comparison of changes of the respective stress field of the reservoir slope in the process of water level rise, the maximum principal stress is mainly compressive stress, the tensile stress just distributes near the top of the slope; with the water level rising, the maximum principal stress increases
Summary
The slope stress analysis under reservoir water level lifting, there are well established in the literature and they are commonly used in practice. By constructing special grid system and intermediate boundary conditions, combined drain seepage system (horizontal drain pipe + transverse- longitudinal blind drainage ditch) is well achieved in the model and the results of model analysis are verified by the results of experiments. As the increase of the filling height, the seepage slope increases correspondingly by Rui-Li Lu and his co-workers [2]. The effects on the stability of the slope from mechanics between the water and rock interaction is mainly reflected on the dynamic change of the groundwater level making the slope stress environment deteriorative [3]. Seepage field and stress field in the slope rock mass maintain a dynamic equilibrium in some way. If one party changes over a certain range, the balance system is likely to be destroyed, slope disasters will be induced [5, 6]
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