人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
16期
48-52,79
,共6页
土石混合体%随机模型%细观结构%概率密度分布
土石混閤體%隨機模型%細觀結構%概率密度分佈
토석혼합체%수궤모형%세관결구%개솔밀도분포
soil-rock mixture%stochastic model%meso-structure%probability density distribution
对三峡库区一处典型堆积层滑坡的崩坡积土石混合体露头二维照片进行图像处理，获取了土石混合体的细观结构特性；并用最大似然估计法进行概率分布类型拟合，再用 Kolmogorov-Smirnov法进行假设检验；根据统计规律建立了土石混合体随机模型。统计结果表明，块体的长轴尺寸与长短轴比服从对数正态分布规律，长轴倾角服从正态分布，分布坐标服从均匀分布，且长轴尺寸的均值和方差均与土石混合体含石量呈线性关系。该随机模型很好地考虑了通常被忽略的小块体，较为细致地反映了土石混合体的细观形态。所建立的土石混合体随机模型可导入有限元软件进行物理力学性质的仿真研究。
對三峽庫區一處典型堆積層滑坡的崩坡積土石混閤體露頭二維照片進行圖像處理，穫取瞭土石混閤體的細觀結構特性；併用最大似然估計法進行概率分佈類型擬閤，再用 Kolmogorov-Smirnov法進行假設檢驗；根據統計規律建立瞭土石混閤體隨機模型。統計結果錶明，塊體的長軸呎吋與長短軸比服從對數正態分佈規律，長軸傾角服從正態分佈，分佈坐標服從均勻分佈，且長軸呎吋的均值和方差均與土石混閤體含石量呈線性關繫。該隨機模型很好地攷慮瞭通常被忽略的小塊體，較為細緻地反映瞭土石混閤體的細觀形態。所建立的土石混閤體隨機模型可導入有限元軟件進行物理力學性質的倣真研究。
대삼협고구일처전형퇴적층활파적붕파적토석혼합체로두이유조편진행도상처리，획취료토석혼합체적세관결구특성；병용최대사연고계법진행개솔분포류형의합，재용 Kolmogorov-Smirnov법진행가설검험；근거통계규률건립료토석혼합체수궤모형。통계결과표명，괴체적장축척촌여장단축비복종대수정태분포규률，장축경각복종정태분포，분포좌표복종균균분포，차장축척촌적균치화방차균여토석혼합체함석량정선성관계。해수궤모형흔호지고필료통상피홀략적소괴체，교위세치지반영료토석혼합체적세관형태。소건립적토석혼합체수궤모형가도입유한원연건진행물리역학성질적방진연구。
Aiming at the colluvial-deluvial soil-rock mixture mass from a typical debris landslide in Three Gorges Reservoir Area, we conduct two-dimensional image process to the picture of outcrop of the mixture, so its meso-structural characteristics are obtained. Then the maximum likelihood estimation is utilized to fit the probability density curve, and then Kolmogorov -Smirnov method is adopted to conduct hypothesis testing. The stochastic model is generated based on the obtained statistical char-acterizations. The results indicate that for the block, the long axis dimension and ratio of long axis to short axis follow the log-normal distribution, while the dip angle of long axis follows normal distribution, and its distributed coordinates follows uniform distribution. Besides, there is linear correlation between the rock proportion in soil-rock mixture and the parameters of mean value and variance of the block long axis dimension. The generated stochastic model includes the small block that was usually ig-nored, so it could reflect meso-structure of soil-rock mixture accurately and by finite element software, the physical and me-chanical characteristics could be analyzed further.
