摘要
为降低城市轨道施工对交通流的影响,建立了基于可靠度的施工区形式及建设时序综合优化模型.施工区的规定阈值时间与实际行程时间之差大于零的概率为可靠度,分别建立交叉口及路段施工区的可靠度模型.定义可靠度与施工时长之积为施工效率系数,以全施工周期效率系数折减最少为目标,建立施工区建设方案综合优化模型,优化施工区形式及建设时序.西安市轨道交通汉城南路站方案的测试结果表明,施工区形式及建设时序会使道路交通可靠度产生不同程度的折减.该方法可为城市轨道交通施工方案的制订提供理论依据.
A reliability based comprehensive optimization model on work zone form and construction sequence of urban rail transit is established to minimize the influence on road traffic flow. The reliability can then be obtained by calculating the probability when the difference between travel time at the work zone and a specified threshold interval is greater than zero. The reliability models for intersection part and road segment part of the work zone can be established respectively. The efficiency coefficient of the work zone can be defined as the product of reliability and construction duration. The work zone form and construction sequence can be optimized by minimizing the reduction of efficiency coefficient for whole construction cycle using the proposed model. The experimental results on Hanchengnan Rd Station of Xi＇an Metro indicate that the reliability of traffic flow at the work zone will change by applying various scenarios of work zone form and construction sequence. The conclusions can provide theoretical basis on formulation of construction arrangement of urban rail transit.
出处
《交通运输系统工程与信息》
EI
CSCD
北大核心
2017年第5期250-256,共7页
Journal of Transportation Systems Engineering and Information Technology
基金
国家自然科学基金(51408049)
中国博士后科学基金(2016M590914)
陕西省自然科学基础研究计划项目(2015JQ5167)
陕西省博士后科研项目(2016BSHEDZZ134)
中央高校基本科研业务经费专项资金(310821161011
310821172202)~~
关键词
系统工程
轨道交通施工区
建设方案优化
可靠度
施工区形式
建设时序
systems engineering
work zone of urban rail transit
optimization of construction arrangements
reliability
work zone form
construction sequence
