浅谈山区高速公路环保施工

结合承建的高速公路路基桥涵工程施工中新的环保理念和保护环境的措施,介绍了山区高速公路建设保护环境的一些经验。     

地铁车站弱电系统UPS集中供电分析

车站弱电系统电源整合是城市地铁领域电源系统建设的发展趋势,简要介绍了目前地铁弱电系统UPS供电的基本特点,并根据地铁弱电系统对电源的要求分析了地铁车站弱电系统采用UPS集中供电的可能性。     

基于《汽车电工电子技术》课程的混合式教学模式改革探究

新形势下,随着科学技术的进一步延伸,汽车行业也开始向着“电动化、智能化、网联化”的方向发展。但是,在实践的过程中,《汽车电工电子技术》课程却存在学生学习兴趣不高,课程与实践脱节等问题。这些问题的出现,不仅影响了学生“特色化”的发展,并且还在很大的程度上,不利于学生职业化与多样化的延伸。因此,本文首先提出了需要探究的主要问题,之后,结合现状,针对性的制定出科学的混合式教学模式改革措施。以此来,帮助学生更加直观的分析重点,提高教学的质量与效率。     

基于GIS/ECDIS和AIS的化工码头及其附近水域环境污染事故应急决策系统

简要介绍了GIS、ECDIS和AIS等6种系统,分析了应急决策系统的特征及其优越性,介绍了应急决策系统的设计,环境污染事故指标系统。通过这些系统的综合应用,对可能发生或已发生的环境污染突发性事故进行预警及准确分析,建立各种事故预防、监测、分析、处理、灾后恢复的数据库。该技术是全球范围对各类码头,特别是以化工码头造成的环境污染事故进行应急决策为研究对象。     

General Construction Technology Scheme of Tianshan Shengli Tunnel on Urumqi-Yuli Expressway北大核心CSCD

With a total length of about 22 km, Tianshan Shengli Tunnel on Urumqi-Yuli Expressway is currently the longest expressway tunnel under construction in the world. It adopts the construction scheme of "3 tunnels (2 D& B main tunnels and 1 TBM-driven middle pilot tunnel) + 4 shafts", which is characterized by great construction difficulty and high technical standard requirements. The tunnel construction is faced with technical challenges such as TBM passing through large fault fracture zones, long-distance construction ventilation in three tunnels, deep and large shaft construction and logistics organization in two-main tunnel construction assisted by middle pilot tunnel. In the parallel three-tunnel method design of Tianshan Shengli Tunnel, the TBM-driven middle pilot tunnel can not only play the role of advanced pilot tunnel, but also assist the construction of the two main tunnels and speed up the construction progress. For the middle pilot tunnel, the TBM excavation diameter is 8.4 m, and the initial support is designed as 100% force-bearing capacity in construction period, which can meet the requirements for two-way material transportation, ventilation and belt mucking in the pilot tunnel. Vault suspension scheme is adopted for the continuous belt conveyor, which can reduce the impact on the material flow organization in the cross passages. Multifunctional service vehicles (MSVs) independently developed by CCCC Group are used for the transportation of TBM materials and prefabricated inverted arch blocks, which can realize double-headed driving. TBM will pass through two large fault fracture zones F6 and F7. According to the stability of the surrounding rock at the tunnel face, the targeted treatment measures would be adopted. If necessary, the scheme of "steel segment + extruded concrete" shall be used for the initial support. In case of serious machine jamming or rock collapse, the heading expansion excavation method or bypass heading method shall be used. Tianshan Shengli Tunnel adopts phased forced ventilation option, and the ventilation mode is designed in stages with the change of tunnel construction stage. The fans and air pipes used are imported ones, and a ventilation management team is set up to strengthen ventilation management and ensure ventilation quality. Highly mechanized construction is used for the two D& B main tunnels, the application of equipment such as three-arm rock drilling jumbo and wet shotcrete machine is promoted, so as to reduce the number of workers and labor intensity, and improve work efficiency. The deep shafts of Tianshan Shengli Tunnel are constructed by short-section excavation and lining mixed operation method, and the initial support is lined by formwork pouring concrete, so as to realize safe and rapid excavation. According to the research results, the construction technology scheme for Tianshan Shengli Tunnel can meet the needs of tunnel construction. The research results can be directly used to guide the construction of Tianshan Shengli Tunnel, and provide reference for the construction of extra long highway tunnels in high-altitude areas. © 2022, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

高速公路建设对国家经济社会发展的系统效应初析

随着高速公路建设的快速发展,高速公路对国家经济社会发挥了日益重要的影响。从宏观层面上采用了定量与定性相结合的方法,对国民经济效益、就业增加等社会效益、综合运输能力提高、交通安全改进效益、土地集约效益、能源及环境效益等方面深入分析了高速公路对社会经济的总体影响,该系统绩效评价将为进一步完善高速公路发展战略和规划提供有力支撑。     

如何实现计算机数据库控制高速公路电子沙盘动态显示

介绍了如何运行计算机数据库控制高速公路基础设施电子沙盘动态显示。     

隧道出口至互通式立交安全距离的浅析

公路路线设计规范要求在当条件受限时,隧道出口至前方互通式立体交叉减速车道渐变段起点的距离不应小于1000m。在山区高速公路的立交设计中可能难以满足要求。结合实际对隧道出口至互通式立交最小安全距离进行浅析。     

皮炮高速公路下面层LAC-25沥青混合料配合比设计

从目标配合比设计、生产配合比设计及生产配合比验证三个过程着重介绍皮炮高速公路路面第二合同段沥青混凝土下面层的配合比设计方法及注意事项。     

浅谈高速公路保护耕地措施

从设计、施工两方面,介绍了高速公路项目实施中,如何采取有效措施减少建设占地,并结合工程实例,阐述了项目实施中采取的保护耕地措施。