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Hysteresis of dam slope Safety Factor under Water Level Fluctuations Based on the LEM Coupled with FEM Method

Computer Modeling in Engineering & Sciences 2022年第11期133卷 351-375页

作者： Guodong Liu Zhijun Zhou Shiqiang Xu Wenjing Mi School of Highway Chang’an UniversityXi’an710046China College of Urban Rural Planning and Architectural EngineeringShangluo UniversityShangluo726000China

Water level variations have caused numerous dam slope collapse disasters around the world,illustrating the large influence of water level fluctuations on dam *** required indoor tests were conducted and a numerical model of an actual earth-filled dam was constructed to investigate the influences of the water level fluctuation rate and the hysteresis of the soil-water characteristic curve(SWCC)on the stability of the upstream dam *** results revealed that the free surface in the dam body for the desorption SWCC during water level fluctuations was higher than that for the adsorption SWCC,which would be more evident at higher water *** safety factor of the upstream dam slope initially decreased and then increased for the most dangerous water level as the water level rose and *** water level fluctuation rate mainly influenced the initial section of the safety factor variation curve,while the SWCC hysteresis mainly affected the minimum safety factor of the water level *** desorption SWCC is suggested for engineering ***,a quick prediction method is proposed to estimate the safety factor of upstream dam slopes with identical structures.

关键词： Water level SWCC safety factor dam slope hysteresis

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Shaking table test and numerical simulation on the effect of reinforcement on the seismic safety of dam slopes

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Journal of Harbin Institute of Technology(New Series) 2011年第4期18卷 132-138页

作者：朱亚林孔宪京邹德高李永胜 School of Civil and Hydraulic Engineering Dalian University of Technology School of Civil and Hydraulic Engineering Hefei University of Technology

The seismic safety of the reinforcement dam slope is studied through shaking table test and numerical *** dynamic characteristics of dam slopes,failure mechanism,seismic stability,as well as the effect of reinforcement during earthquakes are *** elasto-plastic analysis method (FLAC) is used to simulate the dynamic failure process of the reinforcement dam *** change law of permanent displacement of dam slope is *** effect of the length and the space of reinforcement on the depth of slip surface and the slope stability are *** agreement is obtained between the numerical results and those from shaking table *** results show that the dynamic failure is a gradual process not at a particular *** the increase of the reinforcement length or the decreasing reinforcement spacing,the slip surface becomes deeper and thus the slope stability is *** reinforcement can obviously enhance the overall stability of slope *** can also effectively control the shallow sliding of *** researches provide basic data for reinforcement measures design of earth-rockfill dam.

关键词： dam slope shaking table test reinforcement numerical simulation slip surface

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INFLUENCING FACTORS FOR THE ENERGY DISSIPATION RATIO OF STEPPED SPILLWAYS

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Journal of Hydrodynamics 2005年第1期17卷 50-57页

作者： CHENQun DAIGuang-qing ZHUFen-qing CollegeofHydraulicandHydroelectricEngineering SichuanUniversityChengdu610065China StateKeyHydraulicsLaboratoryofHighSpeedFlows SichuanUniversityChengdu610065China No.2SurveyandDesignInstituteofRailway Chengdu610031China

In order to search for the measure to increase the energy dissipation ratio of stepped spillways, some main influencing factors for the energy dissipation ratio of stepped spillways, such as unit discharge, dam slope, height of step and so on, were studied. The results show that the energy dissipation ratio decreases with the increase in the unit discharge and increases as the slope becomes gentle. The effects of step height on the energy dissipation ratio are closely related to unit discharge. If the unit discharge is smaller, the change of energy dissipation ratio with step height becomes greater. While, if the unit discharge is greater, the influence of step height on energy dissipation ratio is very little. According to the distributions of the turbulence kinetic energy and turbulence dissipation rate obtained by numerical simulation, the basic reason of the decrease of energy dissipation ratio with the increase in the unit discharge was discussed and some specific measures to increase the energy dissipation ratio were suggested.

关键词： stepped spillway numerical simulation unit discharge dam slope step height

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