沈海高速公路莆田段总体设计及路线方案探讨

本文以沈海复线高速公路莆田段公路工程初设和定测阶段的总体设计及路线方案比选为例,针对我省山区高速公路项目特点及难点,重点介绍特殊路段路线方案的综合比选,从顺应地形、互通立交节点合理性及符合环保、工程可实施性等角度出发,灵活运用技术指标,优化路线方案,减少桥隧构造物以降低造价及营运成本等多方面探讨了路线设计的关键问题,最后推荐合理的路线方案,旨在为今后类似工程的设计提供一些有益的参考。     

桂柳高速公路改扩建路线方案设计探讨

文章以G72泉州至南宁高速公路广西桂林至柳州段改扩建工程永福至黄冕段典型路线方案为例,针对老路指标低、事故黑点多等问题,比选走廊带、隧道、互通方案,优化线路平纵面,探讨山区高速公路改扩建路线方案,以期为类似工程提供借鉴。     

广西桂海高速公路改扩建工程路线设计探讨

文章结合广西桂海高速公路改扩建工程实例,基于高速公路改扩建路线设计的思路及原则,介绍了桂海高速公路改扩建工程设计方案与路线平纵横断面设计方法,为国内类似工程设计提供参考。     

某山区高速公路的路线方案比选

对贵州省三穗至黎平高速公路的路线方案进行分析,从工程、地质、经济、旅游和社会效益等多方面进行比较,并对路线通过县城水源保护区的方案进行比选,依次选出合理的推荐方案,这对于具有类似地形条件的山区高速公路选线有一定的借鉴作用。     

三维优化决策系统在山区高速公路路线优化中的应用

针对山区高速公路地质环境复杂、路线设计及优化难度大等特点,文章基于数字化、智慧交通的设计理念,以乐业至百色高速公路为依托工程,在路线设计优化过程中利用数字地形模型,同时采用三维优化运算软件对山区高速公路路线进行优化分析,以期较短时间内选择出经济合理的路线方案并大幅度降低工程造价,为同类工程优化设计提供参考。     

漳龙高速公路改扩建工程路线方案设计——以金山至乌石山路段为例

漳龙高速公路改扩建工程是我省第一个山区高速公路改扩建项目,项目规模大、沿线地形地质条件极其复杂,同时改扩建需要解决漳州和溪至龙岩新祠段的长大下坡段事故黑点问题,路线方案设计工作难度很大。本文对金山至乌石山路段高速公路现状、改扩建路线方案选定、改扩建效果进行分析及评价。     

低山丘陵区高速公路前期方案研究思路

以自贡至永川高速公路（四川境）为例,分析低山丘陵区高速公路前期方案研究思路。首先,对项目特点进行剖析,针对项目特点提出相应对策;其次,对建设条件进行深入分析,为路线方案选择提供重要依据;最后,根据项目特点、建设条件、路网布局、交通需求、项目规划对起终点方案及路线走廊进行论证,确定项目起终点方案并推荐路线最优走廊,以期为同类工程提供有益参考。     

崇靖高速公路过古龙山景区段路线方案研究

随着我国山区高速公路建设的不断推进,不可避免地将与沿线的风景区、自然保护区、名胜古迹等产生交集,需正确处理公路与环境、景观的关系。文章介绍了广西崇左至靖西高速公路经过古龙山大峡谷景区路段的前期路线方案比选、后期方案优化及施工现场反馈情况,以期为类似工程的路线设计工作提供参考和借鉴。     

高速公路路线方案设计案例分析

结合永武高速朋口至车田段、泉三高速和洋至小桥段路线方案比选.介绍了山区高速公路路线方案确定原则.可为高速公路路线设计及方案选择提供参考.     

马平路板可隧道纵坡设计方案比选

隧址区的地形条件是选择隧道路线纵坡的重要影响因素,隧道路线纵坡方案一旦不能和地形相适应,会影响工程数量、造价及运营安全。文章结合广西马山至平果高速公路板可隧道工程实例,从通风、照明、地质条件、施工条件及工期等方面,对该隧道路段拟定的两个纵坡设计方案进行综合比选,提出了典型山区地形条件下的隧道路线纵坡设计的注意事项,为类似地形的隧道路线纵坡设计提供参考。     

桂林-三江高速公路宛金段路线设计方案研究

山区复杂的地形、地质、水文和生态环境条件制约着公路路线方案的布置。文章以桂林-三江高速公路宛田-金桔段路线设计为例,通过对其沿线自然条件的分析,提出了针对性的路线设计方案,并结合原工可设计进行了方案比选,评价了所推荐方案的优越性,为山区高速公路设计研究提供依据。     

A highway corridor planning model: QROAD

This model calculates an optimal investment plan for a highway corridor or number of corridors, subject to budget constraints. The available options include upgrading the current alignment, constructing a bypass highway over a different alignment, or various combinations. The budget constraints can be specified as a total budget restriction, or as an available budget each period. The highway system is described by K different road links. Each link consists of the current alignment which may be described by any number of sections, and a bypass section over a new alignment. The model finds the construction plan for each link that maximizes discounted benefits, subject to the financial constraints on the maintenance and capital expenditures. The problem is formulated as a large combinatorial optimization problem. A Lagrangian relaxation of the budget constraints is used, and the problem decomposes by link. A dynamic programming (DP) model is used to solve for the optimal expansion path for each link, given the dual variables. The sub-gradient dual optimization problem is a linear programming problem which is solved for the optimal dual variables. An application is presented based on the World Bank's Third National Highway Project in India, which is a US$1.3 billion project for upgrading approximately 2000 km of the Indian National Highway System. The project was approved based on results from this model.     

应用CAESARⅡ软件优化减压转油线的配管设计

针对常减压蒸馏装置配管设计实例中的2种减压转油线布置方案,利用管道应力分析软件CAESARⅡ,进行了2种转;占线布置方案的管系应力分析。对比两种布置方案的管道应力和加热炉管嘴受力情况,分析两种布置方案增加管系柔性的难度,选出其中柔性较好的配管方案,从而获得了较优的减压转油线的配管设计方案。     

Flexible feeder transit route design to enhance service accessibility in urban area

To improve the accessibility of transit system in urban areas, this paper presents a flexible feeder transit routing model that can serve irregular‐shaped networks. By integrating the cost efficiency of fixed‐route transit system and the flexibility of demand responsive transit system, the proposed model is capable of letting operating feeder busses temporarily deviate from their current route so as to serve the reported demand locations. With an objective of minimizing total bus travel time, a new operational mode is then proposed to allow busses to serve passengers on both street sides. In addition, when multiple feeder busses are operating in the target service area, the proposed model can provide an optimal plan to locate the nearest one to response to the demands. A three‐stage solution algorithm is also developed to yield meta‐optimal solutions to the problem in a reasonable amount of time by transforming the problem into a traveling salesman problem. Numerical studies have demonstrated the effectiveness of the proposed model as well as the heuristic solution approach. Copyright © 2015 John Wiley & Sons, Ltd.     

典型高速公路风吹雪综合安全防护方案研究

文章在总结风吹雪一般防治方法及措施的基础上,结合内蒙古绥满国道主干线博克图至牙克石段高速公路工程,从路基、交通工程设施、监控系统、防雪设施、管理体制等方面,系统地提出高速公路风吹雪综合安全防护方案,供相关工程技术人员参考。     

Liner ship route schedule design with port time windows

This paper examines a practical tactical liner ship route schedule design problem, which is the determination of the arrival and departure time at each port of call on the ship route. When designing the schedule, the availability of each port in a week, i.e., port time window, is incorporated. As a result, the designed schedule can be applied in practice without or with only minimum revisions. This problem is formulated as a mixed-integer nonlinear nonconvex optimization model. In view of the problem structure, an efficient holistic solution approach is proposed to obtain global optimal solution. The proposed solution method is applied to a trans-Atlantic ship route. The results demonstrate that the port time windows, port handling efficiency, bunker price and unit inventory cost all affect the total cost of a ship route, the optimal number of ships to deploy, and the optimal schedule.     

基于Google Earth的公路路线漫游解决方案

介绍了Google Earth及其KML语言的基本知识,提出了在Google Earth中实现沿公路路线漫游的解决方案,给出了实现路线漫游的方法、步骤,为公路路线选线、汇报方案提供了一种生动、直观的表现方式。     

复合式路面加宽工程结构层拼接方案研究

复合式路面拓宽改建工程在国内尚属少数,其结构层的拼接技术尚缺少经验。文章结合工程实例,分析了复合式路面拓宽工程需解决的问题,探讨了复合式路面结构层拼接的优化方案,为类似工程提供参考。     

留下至汪家埠段高架桥施工便桥设计

文章结合杭徽高速公路留下至汪家埠段高架桥工程实践,介绍了该主线桥施工便桥的设计方案,并通过受力计算,验证了该施工便桥设计的合理性。     

SL -2098检漏仪在埋地管线非开挖检测中的应用

文中系统论述了埋地管道外防腐层非开挖检测的重要性和几种前沿技术,对各种技术做出了比较分析,并结合工程实例,提出了采用SL - 2098检漏仪进行埋地管道的非开挖检测的方案.实践证明,检测方案准确可行.