【摘要】 为研究参数不确定性对于地裂缝扩张及发展的影响,利用FLAC^3D建模,模拟在地裂缝两侧土体不同时抽取地下水情况下地裂缝变化情况。以地裂缝两侧水平位移、垂直位移、地裂缝活动量为参数敏感性分析的目标,并通过均匀设计法对断裂粘聚力、断裂内摩擦角等5个参数进行了多次交叉运算,快速准确地判断了参数敏感度大小。研究表明,参数变化对地裂缝活动量及上盘垂直位移影响较大;内摩擦角为影响地裂缝最敏感的因素。研究结果为今后地裂缝的治理提供了参考依据。更多还原

【Abstract】 The paper focused on the influence of the development tendency which is resulted from the parameter uncertainty of ground fissure.As a case study,a simulation with FLAC^3Dmodeling was conducted under the precondition of the different soil on both sides of the ground fissure considering the extraction of groundwater in order to reveal the change of the fissure.Horizontal displacement,vertical displacement and the amplitude of the ground fissure were chosen the target for the sensitivity analysis used the methods of uniform design.The sensitivity analysis was carried out with 5parameters,such as angle of internal friction,cohesion which could estimate the incidence of the different parameters successfully.The results show that the variety of the parameters has a significant influence on the amplitude of the ground fissure and the vertical displacement of hanging wall;the internal friction of the ground fissure is the most sensitive parameter in the model.The results of the study provides a reference basis for the ground fissure treatment in the future.更多还原