草土围堰在水运工程建设中的运用

文章结合某水电站船闸工程下游引航道施工导流和水流控制工程实例,介绍了草土围堰施工的工艺流程及方案,阐述了草土围堰施工的要点,并提出了草土围堰施工的度汛措施。     

多雨地区公路路基水毁的原因及防治对策

多雨地区公路路基水毁破坏是一种不容忽视的病害问题,造成了公路维护成本的增加和不良的社会影响。文章剖析了公路路基水毁破坏的原因,提出了公路路基抗水毁能力的具体措施,包括土料选择、抗洪标准、避免高填深挖以及提高设计质量意识等几个方面,对南方多雨地区公路路基水毁防治具有参考价值。     

高速公路监控系统在冬季除雪、夏季防汛中的应用

高速公路的交通安全与天气状况有着密切的联系,做好冬季的除雪和夏季的防汛,不仅可以减少交通事故,也可以降低养护成本.从工作中的实际情况出发,阐述高速公路监控系统在冬季除雪、夏季防汛中的应用.     

Modelling shared space users via rule-based social force model

The promotion of space sharing in order to raise the quality of community living and safety of street surroundings is increasingly accepted feature of modern urban design. In this context, the development of a shared space simulation tool is essential in helping determine whether particular shared space schemes are suitable alternatives to traditional street layouts. A simulation tool that enables urban designers to visualise pedestrians and cars trajectories, extract flow and density relation in a new shared space design, achieve solutions for optimal design features before implementation, and help getting the design closer to the system optimal. This paper presents a three-layered microscopic mathematical model which is capable of representing the behaviour of pedestrians and vehicles in shared space layouts and it is implemented in a traffic simulation tool. The top layer calculates route maps based on static obstacles in the environment. It plans the shortest path towards agents’ respective destinations by generating one or more intermediate targets. In the second layer, the Social Force Model (SFM) is modified and extended for mixed traffic to produce feasible trajectories. Since car movements are not as flexible as pedestrian movements, velocity angle constraints are included for cars. The conflicts described in the third layer are resolved by rule-based constraints for shared space users. An optimisation algorithm is applied to determine the interaction parameters of the force-based model for shared space users using empirical data. This new three-layer microscopic model can be used to simulate shared space environments and assess, for example, new street designs.     

城际铁路信号系统与防淹门系统接口设计研究

防淹门系统目前主要应用于城市轨道交通系统,在城际轨道交通系统中尚无工程应用先例。为解决城际轨道交通系统的防淹门与信号系统接口控制问题,提出"信号参与防淹门关闭控制"和"信号不参与防淹门关闭控制"两种接口设计模式,研究接口设计原则、接口信息、接口控制过程及实施方案。分析对比两种接口设计模式的特点和适用性。两种接口设计模式均能够满足城际轨道交通信号系统和防淹门系统之间接口控制的要求。在具体工程应用时,应根据防淹门系统的具体情况、信号系统联锁和列控方式及运营方式等,通过综合比选后确定合理的接口设计模式。     

地铁信号系统与防淹门系统的接口设计

基于广州地铁现场工程设计，总结了地铁信号系统与防淹门系统的接口设计，从确保旅客列车安全的角度，重点分析了信号系统根据防淹门系统的状态和请求信息对旅客列车采取的安全防护措施，以及信号系统对防淹门系统请求信息的回应原则。     

Multi-scale robustness model for highway networks under flood events

Transportation system infrastructure often experiences severe flood-related disruptions such as overtopping, erosion, and scour. The ensuing damages can result in enormous direct and indirect economic losses to the traffic network and consequently the individuals through conditions like inaccessibility to commuters and reduction in traffic safety. Many studies have claimed that a robust transportation system could significantly prevent such consequences from natural hazards such as floods, highlighting the importance of robustness measures that could be used by decision-makers to properly manage flooded transportation system. Most available measures related to network robustness assessment are qualitative, and while some recent studies have focused on such evaluation using quantitative assessment approaches related to environmental or social-economic operations, they lack the holistic view towards robustness under flood events. This study develops a composite multi-scale transportation-system robustness model considering flood hazards by synthesizing geographical damage recognition, topological functionality analysis, network operation evaluation, and traffic-user loss estimation. This integrated model has been applied in a real-world highway network, mainly revealing that a given intensive flood occurrence at different locations may result in a variety of after-flood disruptions in the transportation network. To assist the asset owners with developing more reasonable prevention and recovery plans, the developed multi-scale robustness index presents both visible multi-denominational flood consequences and an overall post-event transportation-system robustness indicator.     

浅谈嘉定新城健康科技有限公司研发中心项目防汛论证

通过对具体项目地下公共工程防汛影响专项论证的必要性进行分析,分别对施工期和使用期作了防汛安全影响研究.利用有限元软件分析工程施工期对周边防汛设施的影响,并针对该地下公共工程施工期和使用期存在的防汛安全隐患提出了合理化建议,最终给出了防汛论证的结论.     

城市水系改造排水工程设计的探讨

文章以广西南宁经济技术开发区沙井工业园区一期水系改造排水工程设计为例,介绍排水工程在城市水系改造工程设计中的主体工程、系统工程的设计经验,供排水专业设计人员借鉴。     

城轨正线联锁与门设备的控制接口分析与软件实现

城轨交通信号系统国产化是未来城市轨道建设的必然要求。讨论了作为信号系统核心子系统之一的计算机联锁设备与门设备的接口逻辑和联锁软件实现方法;阐述了计算机联锁应用层软件相关部分的设计方案,以适应城轨正线联锁设备的国产化要求。