香丽高速公路昌格洛滑坡-隧道工程病害三维数值分析     

王剑非  刘昆珏  周文皎  张玉芳  王艳昆  范家玮 《地质科技情报》2022,41(2):34-43

准确评价滑坡-隧道相互作用及稳定性,采用合理的病害防治方法,对保障公路顺利完工具有重要意义.以香丽高速公路昌格洛滑坡为例,利用现场地质调查、钻探等方法查明了滑坡成因机制以及变形特性,通过数值模拟研究了昌格洛滑坡在天然、降雨和开挖等工况下的空间应力应变特征以及稳定性变化,研究了隧道与所穿越滑坡之间的相互作用,据此提出了相...  相似文献   

基于时域有限差分法LIEW动态模型土壤电离参数的估计     

刘昆  宋利晓  王川 《成都信息工程学院学报》2014,29(5):454-457

从电磁场分析角度出发,采用时域有限差分法对电磁场数据进行计算分析,提取土壤电离的信息,将整数微分进化策略与Matlab分布式计算相结合,提出针对任意均匀分布土壤建立LIEW动态模型的方法,优化确定LIEW动态模型参数——土壤电离临界电场强度和电离时间常数。  相似文献   

内孤立波与海脊相互作用的模拟研究   总被引：1，自引：0，他引：1  

李群  徐振华  尹宝树  白涛  刘昆  王洋 《海洋学报(英文版)》2015,34(11):32-37

A nonhydrostatic numerical model was developed and numerical experiments performed on the interaction of an internal solitary wave(ISW) with a sill, for a two-layer fluid with a diffusive interface. Based on the blocking parameter(Br), the flow was classified into three cases:(1) when bottom topography has little influence on the propagation and spatial structure of the ISW(Br0.5),(2) where the ISW is distorted significantly by the blocking effect of the topography(though no wave breaking occurs,(0.5Br0.7), and(3) where the ISW is broken as it encounters and passes over the bottom topography(0.7Br). The numerical results obtained here are consistent with those obtained in laboratory experiments. The breaking process of the incident ISW when Br≈0.7 was completely reproduced. Dissipation rate was linearly related to the blocking parameter when Br0.7, and the maximum dissipation rate could reach about 34% as Br raised to about 1.0. After that, instead of breaking, more reflection happened. Similarly, breaking induced mixing was also most effective during Br around 1.0, and can be up to 0.16.  相似文献