中国安全科学学报最新文献_第6页

Reinforcement effect and stability analysis of high speed railway roadbed 高速铁路路基加固效果及稳定性分析

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.008

Jia Jian-qing, J. Chao, L. Yuanming, Zhao Yangyang, Wang Hongtu

{"title":"Reinforcement effect and stability analysis of high speed railway roadbed","authors":"Jia Jian-qing, J. Chao, L. Yuanming, Zhao Yangyang, Wang Hongtu","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.008","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.008","url":null,"abstract":"In order to determine reinforcement effects and technical parameters of dynamic compaction on roadbedꎬ with silt and silty clay roadbed of a high speed railway as research objectꎬ bearing capacity and deformation law and features of reinforced roadbed by dynamic compaction at 15 and 20 m falling distances were studied through site experiment and numerical simulation. The results show that as tamping times increaseꎬ compaction settlement for each tamping decreases and gradually stabilizesꎬ and settlements of last two tamping of each falling distance can meet termination condition of engineering design. When dynamic compaction is appliedꎬ water contentꎬ dry density and specific penetration resistance of surface soil are all significantly improved with obvious reinforcement effect achieved in efficient reinforcement area. 第 6 期贾剑青等: 高速铁路路基加固效果及稳定性分析 And bearing capacity characteristic values of roadbeds in three test points are greater than 150 kPaꎬ which meets designing requirements. In early stage of dynamic compactionꎬ numerical simulation results are slightly smaller than those of field testꎬ but they agree well with each other as tamping times increase.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"9 1","pages":"50"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83835556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Sequential probabilistic back analysis on hydraulic conductivity of tailings materials 尾砂材料水力传导性的序贯概率反分析

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.023

Jiang Shuihua, Zeng Shaohui, Hu Jinsong, Yao Chi

{"title":"Sequential probabilistic back analysis on hydraulic conductivity of tailings materials","authors":"Jiang Shuihua, Zeng Shaohui, Hu Jinsong, Yao Chi","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.023","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.023","url":null,"abstract":"In order to ensure seepage analysis accuracy of tailings damꎬ deduce hydraulic conductivity probability distribution of tailings material and to reduce its uncertaintyꎬ sequential probabilistic back analysis method of material parameters based on Bayesian updating was proposed. Thenꎬ a surrogate model of water table and likelihood function were constructed. Finallyꎬ with Daheishan tailings dam taken as an exampleꎬ sequential probabilistic back analysis of hydraulic conductivity of multi ̄layered tailings materials was conducted based on monitoring data of water tables. The results show that the proposed approach can effectively infer hydraulic conductivity and probability distributions as well as reduce their variation coefficients which is reduced by 18􀆰 25% for soil layer closer to monitoring points. Realistic uncertainties of hydraulic conductivity and representation cannot be well deduced only from monitoring information of water levelsꎬ and it is necessary to further collect field information of multiple sources and incorporate it into 第 6 期蒋水华等: 尾矿材料渗透系数序贯概率反演分析 probabilistic back analysis.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"35 1","pages":"158"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85681926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation method for plateau airports' emergency support capacity 高原机场应急保障能力评价方法

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.025

Deng Wei, Xia Zhenghong

{"title":"Evaluation method for plateau airports' emergency support capacity","authors":"Deng Wei, Xia Zhenghong","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.025","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.025","url":null,"abstract":"In order to address lack of a scientific quantitative evaluation method for plateau airports ' emergency support capacityꎬ firstlyꎬ content and features of these capabilities were studiedꎬ and operation characteristics of plateau airports and current situation of their emergency support were analyzed. Thenꎬ an evaluation index system was proposed which took into consideration emergency preparednessꎬ emergency monitoring and warningꎬ emergency response and rescueꎬ recovery and construction afterwards. And a comprehensive evaluation model based on AHP and multilevel matter element extension was established. Finallyꎬ by using this modelꎬ emergency rescue support capacity of one plateau airport in southwest China was evaluated based on its actual operation data. The results show that this airport has \" high\" emergency support capabilityꎬ and among all secondary indicatorsꎬ only \" recovery and construction afterwards\" is rated as \" general\" . Such evaluation results are basically consistent with conclusions of its annual work 第 6 期邓伟等: 高原机场应急保障能力评价方法 report on emergency managementꎬ which verifies rationality of the proposed evaluation index system and model.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"10 1","pages":"172"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74529219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Residual strength analysis of internally corroded submarine pipeline based on FOA-GRNN model 基于FOA-GRNN模型的海底内腐蚀管道残余强度分析

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.012

BI Aorui, Luo Zhengshan, Song Yingying, Z. Xinsheng

{"title":"Residual strength analysis of internally corroded submarine pipeline based on FOA-GRNN model","authors":"BI Aorui, Luo Zhengshan, Song Yingying, Z. Xinsheng","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.012","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.012","url":null,"abstract":"In order to explore residual strength of submarine pipelines with internal corrosionꎬ and provide reference for maintenance so as to ensure safe operationꎬ a FOA ̄GRNN calculation method of residual strength was proposed and a prediction model was constructed by using GRNN based on influencing factors like wall thicknessꎬ diameterꎬ corrosion depthꎬ lengthꎬ width and ultimate tensile strength. Thenꎬ FOA was used to optimize the modelꎬ and negative influence of smooth factors were set artificially. Influencing factors and residual strength database were simulated and generated by finite element methodꎬ and trained and predicted through FOA ̄GRNN model. Finallyꎬ with experimental data of pipeline ultimate strength blasting from PETROBRAS Research Institute as an exampleꎬ the prediction model was verified. The results show that average relative error of FOA ̄GRNN model is 16􀆰 53% for residual strength prediction of finite element simulation dataꎬ and 7􀆰 81% for experimental data predictionꎬ 第 6 期毕傲睿等: 内腐蚀海底管道剩余强度的 FOA ̄GRNN 模型 which are reasonable and accurate.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"50 1","pages":"78"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80616568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Assessment on seismic resilience of water supply network based on projection pursuit cluster 基于投影寻踪聚类的供水管网抗震能力评价

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.022

Li Yanfeng, Yin Jiaxiao, Li Chaofeng, Wang Wei, Y. Xiaochen, Li Zipeng

{"title":"Assessment on seismic resilience of water supply network based on projection pursuit cluster","authors":"Li Yanfeng, Yin Jiaxiao, Li Chaofeng, Wang Wei, Y. Xiaochen, Li Zipeng","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.022","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.022","url":null,"abstract":"In order to ensure safe operation of urban water supply network at different levelsꎬ based on resilience analysis and seismic damage mechanism of networkꎬ a seismic safety resilience evaluation index system of the network was established which considered pipelines' physical propertiesꎬ external environment and hydraulic function in pipes. Thenꎬ projection pursuit method was introduced to project evaluation index linearlyꎬ and a projection pursuit cluster model for assessment was established to analyze seismic safety resilience level and to obtain resilience grade and order of each pipes. Finallyꎬ this model was applied to evaluate a water supply networkꎬ and its assessment results were compared with those 第 6 期李岩峰等: 基于投影寻踪聚类的供水管网地震韧性评估 obtained by dynamic classification method and pedigree clustering method. The results show that the proposed evaluation model based on projection pursuit cluster can successfully grade and rank seismic safety resilience of water supply network and comprehensively reflect influence of different elements including pipes' material and connection type.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"6 1","pages":"152"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82022205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of methane content on compound flame propagation characteristics of methane-coal dust 甲烷含量对甲烷-煤尘复合火焰传播特性的影响

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.016

Liu Jing, Chen Xianfeng, Zhang Bo, Gao Wenao, Zhao Qi, Sun Wei-kang

{"title":"Impacts of methane content on compound flame propagation characteristics of methane-coal dust","authors":"Liu Jing, Chen Xianfeng, Zhang Bo, Gao Wenao, Zhao Qi, Sun Wei-kang","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.016","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.016","url":null,"abstract":"In order to explore impacts of methane content on coal explosion process and to master flame propagation law of coal ̄methane explosionꎬ particle size and pyrolysis process of two kinds of coal powder samples were studied by a particle size analyzer and a synchronous thermal analyzer. Thenꎬ a 1 500 mm× 80 mm× 80 mm semi ̄open vertical combustion pipe was used to analyze impacts of coal powder at median particle size of 65 and 25 μm for different methane volume fractions on structureꎬ temperature and velocity of methane ̄coal dust compound flame. The results show that coal flame for 25 μm is brighter than that for 65 μmꎬ and increase in methane volume fraction has a stronger promotion effect on 65 μm coal dust flame. When volume fraction approaches the equivalence ratioꎬ the more regular flame front isꎬ the greater flame velocity is. And as it increasesꎬ both flame temperature and velocity show a trend of increasing first and then decreasing. Flame temperature reaches the maximum value at the content of 9%ꎬ and the maximum 第 6 期刘静等: 甲烷体积分数对甲烷-煤粉复合火焰传播特性的影响 flame velocity of 65 and 25 μm pulverized coal are 26􀆰 53 and 39􀆰 28 m / s when it is 8% and 10% respectively.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"293 1","pages":"106"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79519523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective optimization design for safety system based on isolation-inoperability competing failure mechanism 基于隔离-不可操作竞争失效机制的安全系统多目标优化设计

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.001

Zhao Jianqiang, Xiong Yanming, Zhang Youjian

{"title":"Multi-objective optimization design for safety system based on isolation-inoperability competing failure mechanism","authors":"Zhao Jianqiang, Xiong Yanming, Zhang Youjian","doi":"10.16265/J.CNKI.ISSN1003-3033.2020.06.001","DOIUrl":"https://doi.org/10.16265/J.CNKI.ISSN1003-3033.2020.06.001","url":null,"abstract":"In order to avoid single indicator ̄based design flawꎬ a multi ̄objective optimization design method of safety system based on isolation ̄inoperability competing failure mechanism was proposed. Considering that the core of this method was thresholds setting of isolation component and inoperability componentꎬ three performance indicesꎬ including PLOASꎬ reliability lossꎬ mass costꎬ were utilized to express influence of thresholds setting on system safetyꎬ reliabilityꎬ and mass respectively. On this basisꎬ a relevant multi ̄objective optimization function was establishedꎬ and linear weighted method was applied to converse multi ̄objective optimization problem to a single one. The results show that the proposed method is suitable for solving multi ̄objective optimization problem based on isolation ̄inoperability competing failure mechanismꎬ and Pareto solution sets can be obtained not only for three objectives optimization problemꎬ 中国安全科学学报 China Safety Science Journal 第30卷 2020年 but also for two objectives optimization problem under strong restriction of safety.","PeriodicalId":9976,"journal":{"name":"中国安全科学学报","volume":"13 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89733828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk assessment in construction of small-diameter deep drainage tunnel 小直径深排水隧道施工风险评价

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.017

Wang Junwu, Hu Die, Wu Han, W. Mengyu, Liu Denghui

引用次数: 1

Experimental investigation on phase transition and heat transfer characteristics for liquid carbon dioxide in loose coal 松散煤中液态二氧化碳相变及传热特性的实验研究

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.015

Yu Zhi-jin, Yang Song, Gu‐Sheng Yu, Deng Jun

引用次数: 0

Research on characteristics of expressway truck accidents in different regions 不同地区高速公路货车事故特征研究

中国安全科学学报 Pub Date : 2020-06-28 DOI: 10.16265/J.CNKI.ISSN1003-3033.2020.06.018

Liang Zhenming, Niu Yi, Fan Yun-xiao, Wang Rui

引用次数: 3