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软土地基上土工管袋围堤的稳定性分析 被引量:12
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作者 宋为群 叶志华 彭良泉 《人民长江》 北大核心 2004年第12期32-34,共3页
长江口某一吹填工程,利用土工管袋充填粉细砂技术,成功地在软土地基上修筑了围堤。众所周知,在软弱地基上修筑围堤,施工期间围堤的稳定性直接决定着堤防工程的成败,因此,对软土地基上土工管袋围堤的稳定性进行研究十分重要;但由于土工... 长江口某一吹填工程,利用土工管袋充填粉细砂技术,成功地在软土地基上修筑了围堤。众所周知,在软弱地基上修筑围堤,施工期间围堤的稳定性直接决定着堤防工程的成败,因此,对软土地基上土工管袋围堤的稳定性进行研究十分重要;但由于土工管袋的加筋作用,使得围堤的稳定性分析相当复杂,现有规范推荐的计算方法由于复杂繁难而不易被工程技术人员所接受,严重地限制了土工管袋围堤在水利工程上的广泛应用。鉴于此,提出利用袋装砂的拟凝聚力进行袋装砂围堤的稳定性分析方法。该方法不仅减少了计算工作量,而且易被工程技术人员所接受。计算结果表明该计算方法符合工程实际。 展开更多
关键词 袋装砂 拟凝聚力 稳定性分析 软土地基
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长江口袋装砂围堤稳定分析方法探讨 被引量:6
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作者 彭良泉 李令长 《人民长江》 北大核心 2015年第16期23-26,共4页
为使土工织物袋装砂围堤的稳定计算简单易行且更加符合实际,针对长江口袋装砂围堤工程,分析了袋装砂围堤土工织物的加筋机理,指出了常规袋装砂围堤稳定分析方法存在的缺陷,从理论上导出了袋装砂围堤拟凝聚力公式。算例表明,利用拟凝聚... 为使土工织物袋装砂围堤的稳定计算简单易行且更加符合实际,针对长江口袋装砂围堤工程,分析了袋装砂围堤土工织物的加筋机理,指出了常规袋装砂围堤稳定分析方法存在的缺陷,从理论上导出了袋装砂围堤拟凝聚力公式。算例表明,利用拟凝聚力进行围堤稳定分析,既充分考虑了土工织物加筋对围堤稳定的有利影响,又修正了极限平衡法不能直接考虑土工织物变形对稳定分析影响的缺陷。对软基袋装砂围堤工程的稳定分析具有一定的指导意义。 展开更多
关键词 拟凝聚力 稳定分析 袋装砂围堤 长江口
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袋装砂围堤在吹填施工中的稳定性分析 被引量:1
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作者 吴全飞 《建筑技术开发》 2020年第9期29-31,共3页
结合南安市海峡科技生态城A片区A2,A6地块土地平整工程,分析了袋装砂围堤的加筋机理和破坏形式,从理论上推导出袋装砂拟凝聚力公式,进一步提出围堤稳定性分析方法。同时阐述了袋装砂围堤的施工技术要求及质量控制要点,提出工程施工中的... 结合南安市海峡科技生态城A片区A2,A6地块土地平整工程,分析了袋装砂围堤的加筋机理和破坏形式,从理论上推导出袋装砂拟凝聚力公式,进一步提出围堤稳定性分析方法。同时阐述了袋装砂围堤的施工技术要求及质量控制要点,提出工程施工中的薄弱环节,以避免围堤失稳,可为袋装砂围堤在吹填工程中的设计施工应用提供借鉴。 展开更多
关键词 袋装砂围堤 稳定性 加筋 拟凝聚力
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Empirical Analysis on Influence Mechanism of Cohesiveness and Collective Efficacy of Virtual Community Based on Triadic Reciprocal Determinism 被引量:2
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作者 NING Lianju LIU Qian XIA Wen 《China Communications》 SCIE CSCD 2014年第11期146-155,共10页
The virtual community has become a new life style as for human,but the public's acceptance is relatively low at present.So the research about the mechanism of the influence on the cohesiveness and the collective e... The virtual community has become a new life style as for human,but the public's acceptance is relatively low at present.So the research about the mechanism of the influence on the cohesiveness and the collective efficiency in virtual community has an important theoretical value and practical value.In the paper,the key variables that affect virtual community cohesiveness are extracted from two aspects—self-perception of community members and community environment,and the influence mechanism model of virtual community cohesiveness and community collective efficiency is established based on Triadic Reciprocal Determinism.By means of the questionnaire on the community members and the empirical analysis,the key factors influencing cohesiveness of virtual community are brought up,as well as the mechanism that the four dimensions of cohesiveness work,on collective efficiency.According to the results,it is practically meaningful that the problems and insufficiency in the operation of existing virtual community are discovered,which guides the operating managers of the virtual community to formulate operation policy of the virtual community for operating managers to develop strategies. 展开更多
关键词 virtual community COHESIVENESS collective efficacy environment variables self-cognition.
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How to Make Virtual Community More Active and Cohesive:From Brand and Perceived Protection Perspectives
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作者 万岩 林国源 范静 《China Communications》 SCIE CSCD 2013年第12期1-15,共15页
With the increasing popularity of the Internet and mobile Internet, the Virtual Community (VC) is becoming an important medium for person-to-person communication. To realise the potential of the VC, it is neces- sar... With the increasing popularity of the Internet and mobile Internet, the Virtual Community (VC) is becoming an important medium for person-to-person communication. To realise the potential of the VC, it is neces- sary to cultivate within it good group cohesion and vitality. Using empirical and experimental research methods, this study explores the ef- fect of users' trust in the VC Platform (VCP) on group cohesion and vitality and how brand and perceived privacy security can affect us- ers' trust in the VC. The research results indi- cate that the brand of the VCP can directly af- fect users' trust in the VC, and can also influe- nce it indirectly through users' perceived pri- vacy protection and perceived security protec- tion. Further, this study also confu'ms that the performance of the VC (group cohesion and vitality) is significantly affected by users' trust in the VC. The results of this study can provide theoretical guidance for internet companies to maintain and enhance the value of VCs. 展开更多
关键词 trust in the virtual community pla-tform group privacy concern perceived priv-acy protection perceived security protection group cohesion group vitality
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