Analysis of Detection and Monitoring Technology in the Construction and Maintenance of Large Bridges

Currently,there is significant attention placed on the construction,management,and maintenance of large service bridges.Within the realm of bridge maintenance management,the utilization of detection and monitoring technology is indispensable.By employing these technologies,we can effectively identify any structural defects within the bridge,promptly uncover unknown risks,proactively establish maintenance strategies,and prevent the rapid deterioration of bridge conditions.This article aims to explore the advantages of applying bridge monitoring and testing technology and to discuss various methods for implementing detection and monitoring technology throughout the construction,management,and maintenance phases of large bridges.Ultimately,this will contribute to ensuring the safe operation of large bridges.

Research of BIM Technology in Urban Rail Operation and Maintenance and Application

With the rapid development of urban rail transit,the traditional operation and maintenance methods mainly rely on manpower,and the pressure on equipment operation and maintenance is increasing,and the low work efficiency,high intensity and high operating costs have always been the main problems at this stage.Through BIM visualization technology can effectively solve those problems,the operation and maintenance mode of urban rail signal equipment at this stage is discussed,the integration and visualization of BIM technology are used to make the judgments and early warnings on the maintenance of urban rail signal equipment,and play a positive and important role in operation and maintenance work,this research result can provide ideas and references for urban rail transit operation and maintenance in the new era.

Discussion on the Application of Highway Maintenance Platform Based on GIS + BIM Technology—Taking Gansu Province as an Example

Gansu Province is a large province in Western China, and its geographical location and economic status are very important. With the state’s attention to the western development, the economy of the western region represented by Gansu Province has developed rapidly, and the construction of roads and other infrastructure has also been developed. Taking Gansu Province as an example, this paper studies and discusses the application of highway maintenance platform based on GIS + BIM Technology. Firstly, this paper expounds the advantages of GIS + BIM Technology in highway construction and maintenance, and analyzes the development status of GIS + BIM Technology;Secondly, it expounds how to solve the problem of highway maintenance from the aspects of GIS + BIM system and its advantages and difficulties in highway maintenance, and briefly explains the difficulties existing in highway maintenance in Gansu Province. Then, starting from the path of GIS + BIM Technology to solve highway maintenance in Gansu Province, this paper analyzes the expected effect of GIS + BIM Technology in highway maintenance in Gansu Province.

Disease Characteristics and Maintenance Technology of Highway Subgrade and Pavement

In recent years,the subgrade and pavement diseases account for the vast majority of the expressway maintenance diseases,which puzzles many expressway maintenance departments and units.To sustain the continuous development of the expressway,the service level of the expressway is need to be improved,by ensuring the safety of the people,and by providing more convenient services for the people during travel.The technical measures for scientific maintenance of expressway subgrade and pavement diseases were discussed in this paper.Further,this paper discusses the main subgrade and pavement diseases types,and proposed the targeted maintenance methods,which can be as a reference for the expressway maintenance departments.

Failure Prediction and Intelligent Maintenance of a Transportation Company’s Urban Fleet

The present work deals with intelligent vehicle fleet maintenance and prediction. We propose an approach based primarily on the history of failures data and on the geographical data system. The objective here is to predict the date of failures for a fleet of vehicles in order to allow the maintenance department to efficiently deploy the proper resources;we further provide specific details regarding the origins of failures, and finally, give recommendations. This study used the Société de transport de Montréal (STM)’s historical bus failure data as well as weather data from Environment Canada. We thank Facebook’s Prophet, Simple Feed-forward, and Beats algorithms (Uber), we proposed a set of computer codes that allow us to identify the 20% of buses that are responsible for the 80% of failures by mean of the failure history. Then, we deepened our study on the unreliable equipments identified during the diffusion of our computer code This allowed us to propose probable predictions of the dates of future failures. To ensure the validity of the proposed algorithm, we carried out simulations with more than 250,000 data. The results obtained are similar to the predicted theoretical values.

Research on the Integration of BIM Technology in Prefabricated Buildings

Today we are in a technologically explosive information society. The cross- border integration of manufacturing and construction is prefabricated buildings. The cross-border integration of construction and IT is BIM technology, and the emergence of BIM technology provides new ideas for prefabricated building, and the integration of prefabricated building and BIM technology realizes the construction industrialization. This paper studies the application of BIM technology in prefabricated buildings, including the design phase, construction and assembly phase, operation and maintenance phase, and application analysis of related software, so as to improve the high efficiency, high quality and high precision development of prefabricated projects, and promote domestic green environmental protection. The development of the construction industry provides reference value for the application of BIM technology in prefabricated buildings.

Dynamic Evaluation Model and Application Methods for Engineering Machine Maintenance Quality

It is an important content of equipment management to keep the engineering machine well. Based on the theory of component technology and grey related algorithm arithmetic, the requirements and procedures of engineering machine maintenance predicting process are analyzed, and a support object evaluation system is provided. The qualitative and quantitative indexes of evaluating process are fully taken into consideration to provide scientific methods and ways for proper evaluation and decision.

Application of Technology in the Fault Diagnosis of Large Centrifugal Pump Units

In order to promote the stability of centrifugal pump units and maximize the role of centrifugal pumps, this paper analyzes the composition and basic working principle of centrifugal pumps, presents the main concerns of centrifugal pump maintenance, and finally investigates the common faults and maintenance methods of centrifugal pumps for reference.

船载运维机器人关键技术与展望

船舶运维技术是水路交通系统安全、绿色、高效运行的关键。随着人工智能技术的快速发展,船载运维机器人开始逐步用于完成危险、繁重的船舶运维作业任务。首先,介绍船载运维机器人的国内外研究现状,并归纳目前主要的船舶运维作业类型;其次,梳理船载运维机器人技术在船舶验舱、船底清洗、除锈喷漆、清舱和巡检等典型船舶运维作业中的应用情况;再次,分析船载运维机器人的关键技术研究现状以及面临的挑战;最后,对未来船载运维机器人技术的研究和应用进行展望。

基于BIM和语义网的轨道智能运维管理方法

建筑信息模型(BIM)技术对提高轨道运维管理效率具有重要的推进作用。然而,不同的检查和维护活动产生的数据异构性高、时空关系复杂,阻碍了BIM解释和整合数据的进程。为此,开发了一个基于工业基础类(IFC)和语义Web技术的轨道运维本体(TOMO),其具有3个功能:①基于轨道运维生命周期的应用需求,简化BIM模型信息;②引入映射规则,建立数据提取与转换模块,集成多源异构数据,结构化定义数据之间复杂的时空关系;③结合数据驱动技术,研究轨道精调智能优化的方法,提供弹性决策支持。最后,以某高速铁路静检数据为例,验证了该框架的有效性与实用性,对于促进领域数据互操作性、降低运维人员劳动强度和提高运维管理智能化程度具有实际的工程指导意义。

超声-紫外(US-UVC)联用绿色科学养护当归

目的采用超声净洗和短波紫外(UVC)消毒技术联用绿色科学养护中药材当归,通过定期观测,分时段取样测定各中国药典指标,同时UVC消毒再养护,根据结果评价养护效果并分析优化确定超声-紫外(US-UVC)联用养护当归药材的最佳条件.方法以纯净水清洗当归(CG-W)和超声净洗当归(CG-US)作为对照组,将当归超声净洗后干燥直至足干,再利用UVC照射消毒至设定的时间,通过定期肉眼观测和分时段测定各种药典指标及其变化,综合评价养护效果.结果CG-W对照组当归18月后仍无霉变但有极其轻微的虫蛀,到24月时出现了略微的霉变,似有轻微色变和隐约渗油,历时27月时出现可见且明显的虫蛀;对照组CG-US当归21月末出现轻微虫蛀,24月时虫蛀仍然较轻,且无明显霉变和色变;US-UVC联用养护组中US-UVC-0.5h组在27月末出现了轻微药材粉末,且在27~30月间仅有部分药材出现虫蛀,且一直没有霉变和色变,颜色无明显变化,而US-UV-1.0h组的当归在贮藏至30月末时出现了极轻虫蛀迹象.US-UV-2.0h、US-UV-3.0h和US-UV-4.0h各组当归在养护后贮藏期间的30月内始终保持表观完好无损的状态,既无虫蛀也无霉变、色变现象发生.对照组及试验各组各时段所测定的各种主要药典指标均符合要求,且由测定结果的相对标准偏差(RSD)值及其范围足以说明测定方法的重复性和稳定性良好.结论考虑成本和养护时效,以US-UVC-2.0h养护为最佳养护配比组合进行养护,养护后当归药材完好贮藏期超过30月,US-UVC联用养护中药材当归具有经济高效、操作简便、省时节能、安全环保等特点,可以推广应用.

汽车发动机冷却系统故障诊断及维修关键技术探索

文章首先阐述了汽车发动机冷却系统的概念,介绍了该系统的设计原理及工作特点,在此基础上总结了系统故障成因,综合分析了导致冷却系统故障的各种因素及其具体表现,针对这些情况,提出针对性的诊断和维修关键技术。这不仅能显著提升发动机的功率和效率,还能降低系统故障率,提高车辆的可靠性,同时实现安全、节能和延长发动机寿命的目标。

首钢长钢8号高炉长寿生产实践

高炉长寿是一项系统工程,仅靠任何单一技术无法实现高炉长寿目标,必须统筹考虑高炉设计、砌筑、维护及操作等各个环节。首钢长钢8号高炉第二代炉龄在加强高炉长寿方面通过建立完善的监控设施、推行高炉长寿体检管控模式、建立数据化研判机制、推行护炉措施、控制边缘气流、在线更换冷却壁、炉衬喷补以及精细化高炉操作等措施,实现了高炉稳定顺行,单位炉容产铁量10 640 t/m^(3),达到长寿高炉标准。

老旧直升机维修中无损检测技术的应用

随着使用年限的增长,老旧直升机结构性故障和偶发性故障逐渐增多,给维护修理带来了诸多困难,维护人员常常不能及时发现和消除故障隐患。针对当前老旧直升机的特点和维修现状,介绍了无损检测技术在航空维修领域中的应用,结合直升机结构特点和使用情况探讨确定老旧直升机无损检测的重点部位和关键部件,围绕不同无损检测技术特点对直升机关键部件检测的具体应用方法进行阐述,并结合老旧直升机维护实践对无损检测技术的使用时机做出探讨和研究,最后对无损检测技术在老旧直升机维修中的应用前景进行了展望。

烟草制造业务系统智能运维平台的设计与应用

随着国家“两化融合”战略的提出和实施,烟草企业积极响应并进行全面的信息化建设,信息技术在烟草企业的深入发展,信息化业务系统以及数据量呈指数态势上升,同时烟草企业内部各个业务系统相对独立,在系统间缺乏有效的数据共享和协同,存在系统竖井的问题,业务端与设备端运维缺乏有效的协同支持,为运维人员的日常工作带来了很大的挑战。本文研究智能运维在烟草企业的落地场景,通过应用性能指标异常智能化分析、系统故障的智能化判断与辅助、日志集中管理与分析以及系统性能容量预测四大场景,设计以烟草制造业务与IT资源双稳定为运维视角的智能运维平台。

智慧校园楼宇建设与运维一体化管理系统研制探索

伴随大数据、物联网、人工智能等新兴科学技术的高速发展,智慧校园(城市)建设在整个社会掀起热潮。智慧建筑楼宇群是智慧校园的载体,数据驱动的建筑楼宇群设备自控及智慧运管,也就成为了智慧校园发展的必然趋势。本研究充分发挥了建设主体与运营主体高度统一的优势,以BIM技术为抓手,打通新老建筑设备系统通信的壁垒,深度整合了施工管理平台与运维管理平台,探索研制建设与运维一体化管理系统,为国内同类型智慧校园楼宇建设提供了积极示范。

基于检修工艺的固定式地铁车辆称重系统应用研究

随着地铁的快速发展以及乘客对乘车舒适性要求的提高,整个地铁行业对车辆运行品质和性能的要求也越来越高。地铁车辆称重系统可实现对地铁车辆的精准调平,为行车安全提供保障。文章对地铁车辆称重系统现状进行分析,基于西安地铁2号线的检修工艺设计,介绍地铁车辆称重系统在车辆段检修工艺中应用的必要性,以及其在西安地铁2号线渭河车辆段中的应用实例。相关研究结论和建议可为地铁车辆称重系统在车辆段检修工艺设计及应用方面提供参考。

激光微加工技术在航空发动机维护和翻修工作中的应用

航空发动机长期处于高温、高频率的工况时,发动机叶片等零部件老化速度较快,需要对发动机定期开展维护和翻修工作。使用激光微加工技术可以进行快速的表面处理,包括进行涂覆层的重构、去除表面污垢等。分析在航空发动机维护和翻修工作中如何使用激光微加工技术进行微纳构造处理、激光清洗,以及如何使用增材制造技术,帮助维修技术人员了解激光微加工技术的特点和应用方法,提高航空发动机维护和翻修工作水平,保证发动机处于正常工作状态。