基于数值模拟分析的土石坝泄洪与蓄水过程安全预测

针对土石坝在泄洪及蓄水过程中较易诱发影响其稳定性的突发事件的部分因素,利用数值分析法模拟了其作用机理,找出了一些可利用的规律。据此,可在不知泄洪或蓄水可能在某一状态会带来不良后果的情况下去预测坝体在水位达到一定高度时的破坏状态,旨在为工程提供一定的加固依据,达到防灾减灾的目的。同时,利用有限元分析方法分析可能的危险状态下坝体内部系统作用状态,从理论上进一步验证在该状态下的坝体稳定状况。

Discussion on numerical simulation analysis-based safety prediction of flood discharge and water impoundment of earth-rock filled dam

For a part of the factors those are prone to induce some sudden events which impact the stability of earth-rock filled dam during its flood discharge and water impoundment， their effect mechanisms are simulated herein with the numerical analysis and then some available laws are found out. On the basis of this， the damaged state of the dam body can be predicted under the condition that adverse consequences are unknown to be caused by the discharge or water impoundment under a certain status， when water level reaches to a certain height，so as to lay a certain basis for strengthening the project concerned and get the target of disaster prevention and mitigation. Meanwhile， the status of the internal system effect of the dam body under a possible dangerous condition is analyzed with the finite element method and the stability of the dam body under the condition is further theoretically verified as well.