CAJ | 학술논문

坝体的变形及稳定性计算分析中，合理地选择模拟填筑层数并考察水位对坝体变形及稳定性的影响是十分必要的。首先以变形和稳定性系数作为评价指标，利用强度折减法计算坝坡的稳定性系数，基于 FLAC3D建立坝体的分层填筑三维数值模型，对施工填筑期的数值模拟填筑层数的选取标准进行了研究。其次，在合理的模拟填筑层条件下，研究了不同蓄水位对坝体的变形和稳定性的影响。结果表明：坝体的变形以沉降为主，模拟计算的坝体沉降与填筑层数关系很大。相对坝体沉降来说，水平位移和稳定性系数对填筑层数的敏感性小，应以满足坝体沉降的精度标准选择模拟填筑层数，建议模拟填筑层数不少于10层，坝越高，选取的模拟填筑层数宜越多；坝体的水平位移对库水位位置较敏感，沉降和稳定性系数对库水位位置敏感性小。这些结果在坝体变形和稳定性研究中对确定合适的填筑层数和考虑库水位的影响具有指导意义。
패체적변형급은정성계산분석중，합리지선택모의전축층수병고찰수위대패체변형급은정성적영향시십분필요적。수선이변형화은정성계수작위평개지표，이용강도절감법계산패파적은정성계수，기우 FLAC3D건립패체적분층전축삼유수치모형，대시공전축기적수치모의전축층수적선취표준진행료연구。기차，재합리적모의전축층조건하，연구료불동축수위대패체적변형화은정성적영향。결과표명：패체적변형이침강위주，모의계산적패체침강여전축층수관계흔대。상대패체침강래설，수평위이화은정성계수대전축층수적민감성소，응이만족패체침강적정도표준선택모의전축층수，건의모의전축층수불소우10층，패월고，선취적모의전축층수의월다；패체적수평위이대고수위위치교민감，침강화은정성계수대고수위위치민감성소。저사결과재패체변형화은정성연구중대학정합괄적전축층수화고필고수위적영향구유지도의의。
To select the number of filling layer rationally and consider the influence of water level on deformation and stability is necessary in the numerical simulation of dam deformation and stability.Firstly,deformation and sta-bility coefficient are selected as assessment indexes,and strength reduction method is introduced to calculate the stability coefficient of dam slope.Moreover,3-D numerical model of layered filling is set up based on FLAC3D to study the criteria of selecting the number of filling layer.Furthermore,on the basis of appropriate number of filling layer,the effect of water level on the deformation and stability of dam body is discussed.Results show that settle-ment is the predominant deformation and simulated settlements are closely related with the number of filling layer. Compared with settlement,horizontal displacement and safety factor are less sensitive to the number of filling layer which should be chosen according to the requirement of settlement precision;it is advised that the number of filling layer is not less than 1 0 layers,and the higher the dam,the more the number of filling layer should be.The hori-zontal displacement is more sensitive than the settlement and stability coefficient to water level of reservoir.These results are of guiding significance to determining the appropriate number of filling layer simulation.