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基于限流指数的城市轨道交通常态限流方案评估 被引量:5
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作者 禹丹丹 豆飞 +3 位作者 芦毅 姚向明 刘浩然 吴倩 《武汉理工大学学报(交通科学与工程版)》 2019年第4期646-651,共6页
针对轨道交通限流组织中缺乏有效的事后评估指标及方法,构建限流指数对限流方案实施效果进行量化评估.从车站、线路、网络三个层次构建限流指数计算方法.其中车站限流指数以车站进出站客流、相邻区间断面量及换乘量内在关系为基础,并考... 针对轨道交通限流组织中缺乏有效的事后评估指标及方法,构建限流指数对限流方案实施效果进行量化评估.从车站、线路、网络三个层次构建限流指数计算方法.其中车站限流指数以车站进出站客流、相邻区间断面量及换乘量内在关系为基础,并考虑车站站台承载能力;线路限流指数是在车站限流指数基础上进一步考虑区间客流拥挤状态;网络限流指数是对路网内所有线路的综合考量.所构建限流指数具有基础数据易获取、计算简便、理论基础明晰等特点.以北京地铁为对象进行实证研究,结果显示:限流指数能够科学量化限流力度与客流拥挤间协调匹配关系,捕捉客流需求及运力的波动变化. 展开更多
关键词 限流方案评估 限流指数 城市轨道交通 客流拥挤 常态限流
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Analysis of one-dimensional rheological consolidation of double-layered soil with fractional derivative Merchant model and non-Darcian flow described by non-Newtonian index 被引量:3
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作者 CUI Peng-lu LIU Zhong-yu +1 位作者 ZHANG Jia-chao FAN Zhi-cheng 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第1期284-296,共13页
To further investigate the one-dimensional(1D)rheological consolidation mechanism of double-layered soil,the fractional derivative Merchant model(FDMM)and the non-Darcian flow model with the non-Newtonian index are re... To further investigate the one-dimensional(1D)rheological consolidation mechanism of double-layered soil,the fractional derivative Merchant model(FDMM)and the non-Darcian flow model with the non-Newtonian index are respectively introduced to describe the deformation of viscoelastic soil and the flow of pore water in the process of consolidation.Accordingly,an 1D rheological consolidation equation of double-layered soil is obtained,and its numerical analysis is performed by the implicit finite difference method.In order to verify its validity,the numerical solutions by the present method for some simplified cases are compared with the results in the related literature.Then,the influence of the revelent parameters on the rheological consolidation of double-layered soil are investigated.Numerical results indicate that the parameters of non-Darcian flow and FDMM of the first soil layer greatly influence the consolidation rate of double-layered soil.As the decrease of relative compressibility or the increase of relative permeability between the lower soil and the upper soil,the dissipation rate of excess pore water pressure and the settlement rate of the ground will be accelerated.Increasing the relative thickness of soil layer with high permeability or low compressibility will also accelerate the consolidation rate of double-layered soil. 展开更多
关键词 double-layered soil rheological consolidation fractional derivative non-Darcian flow non-Newtonian index finite difference method viscoelasticity
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