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461.
318国道安徽段高速公路原为白色路面,至2003年损坏严重,高速公路公司决定将白色路面改造为黑色路面。本文主要介绍“白改黑”设计中原水泥混凝土路面加固方案的权衡与采用,以及初步的实施效果 相似文献
462.
高速公路建设与经营管理公司化 总被引:3,自引:0,他引:3
高速公路建设是目前公路行业的主要任务,但高速公路的经营管理也是一项很重要的工作。在交通系统的机构改革中,加强高速公路管理已成为各级公路管理部门的重要工作,因此,高速公路建设和经营管理机制改革,应与公司化改革同时进行。 相似文献
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莱新高速公路岩溶路基塌陷机理分析 总被引:2,自引:0,他引:2
针对莱新高速公路莱钢水源地岩溶路基塌陷的现象,阐述岩溶塌陷的基本理论,分析岩溶塌陷的机理及其危害,提出莱新高速公路岩溶路基塌陷的种类、处治技术和加固要求。 相似文献
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监理工作的好坏直接影响施工质量与进度。潭邵高速公路采有现场监理考核的方式,较好地解决了质量监控的问题。 相似文献
468.
文章分析了目前大多数高速公路公司在收费员管理上存在的误区,并结合收费员的工作特点,提出了针对性的改进措施,同时介绍了广西坛百高速公路有限公司收费员管理的经验做法。 相似文献
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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. 相似文献