高速公路社会效益量化方法研究

在对高速公路社会效益的常用计量方法进行研究的基础上,对于较少采用的经济潜力模型进行初步研究。并结合实际工程项目,提出采用多种模型进行综合计算的基本思路,为高速公路社会效益量化提供一种综合计量方法。     

考虑服务交通量的加速车道长度设置方法

高速公路加速车道的设置长度不仅取决于主路及匝道的设计速度,还与主路及匝道的交通量有关。本文给出了不同主路服务交通量下的匝道通行能力,建立了在主路不同交通负荷下的匝道车辆可直接汇入的概率计算模型。最后给出了在一定的匝道车辆汇入概率和主路服务交通量下的加速车道长度设置方法,以及不同主路、匝道设计速度和服务交通量下的加速车道长度的推荐值。     

莱新高速公路岩溶路基塌陷机理分析

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。     

浅谈潭邵高速公路的现场监理考核工作

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。     

地下通道大跨度接口梁受力分析

地下通道接口梁在跨度很大时,处于弯、剪、扭复合受力状态。接口梁的跨度大,且荷载大,板墙的厚度也相应较大,其实际受力情况复杂。建立了更接近真实受力状态的三维模型来计算接口梁的弯矩、剪力及扭矩。由该模型计算所得的弯、剪、扭分布规律,与采用常规简化计算得到的值差异较大,计算截面位置的内力值同样大幅小于常规简化计算的内力值。     

运营中的地铁徐泾东站改造与上盖结构施工的协调管理

上海市轨道交通2号线徐泾东站,其地下为既有地铁终点站和区间隧道,地上为新建中国博览会会展综合体工程(简称为“国展”).国展施工建设前,需先调整徐泾东站旅客进出站流程,改造地铁出入口等设施,为国展施工腾出场地和空间;建成后,部分地铁出入口、逃生通道和通风井位于国展建筑内,形成一个整体.在对地铁出入口改造时,需保障轨道交通正常运营和车站客流组织工作的正常进行.按照投资和实施界面,对位于国展内的地铁车站进行新建和改建时,地下部分属地铁运营单位,地上部分属国展,因此对施工管理提出了较高要求.通过对施工特点及难点的分析,确立关键施工线路,较好地配合了国展建设.此项工作对同类地铁车站改造工程具有借鉴意义.     

浅谈高速公路收费员管理的误区及改进措施

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。     

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。     

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。