Page 139 - 捷運技術 第43期

捷運技術半年刊 第43 期 133

環狀線 Y6 站前橫渡線位置評估與建議

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࿋݇౮ cᒤқϓ cᘽ၅Ը cੵᎲѩ 4
摘 要
ઠ༶ᐑًᇞމЕஹɽ̨̏ઠ༶༩ၣʘࠠࠅٙɓᐑdʱɧචݬ݄ʈஷԓdୋɓචݬʊ
ආɝ஝ྌணࠇЪุdᇍఖމY6१~Y19१dՉʕৰY6މήɨԓ१̮dՉቱѩމ৷ݖԓ१d
͟׵Y6१މɓήɨԓ१d݂Չዑನᇞ(Զୋɓචݬᑗࣛ୞ᓃ१ΐԓұڏԴ͜)ʘЗໄʿڗ
ܓਗ਼ᅂᚤ݄ʈࠬᎈeʈ೻຾൬ʿΐԓᐄ༶फ൷ഃධͦf
͉˖ઞীઠ༶ᐑًᇞY6१ۃዑನᇞЗໄГ୅262ʮˉe389ʮˉʿ547ʮˉɧࡈಁ˾˙
ࣩAeBeCʘΐԓұڏࣖଟeʈ೻ࠬᎈʿʈ೻຾൬൙Пf൙Пഐ؈ᜑͪd˙ࣩAၾBʥπ
ί݄ʈѢᗭʿࠬᎈʘਪᕚdʔΐމܔᙄࣩi˙ࣩCᒱʔঐ༺ϓணࠇफ൷90߆ʘͦᅺdШʥ
̙ୌΥᐑًᇞΌᇞφࢤफ൷2.5ʱᙒʘࠅӋd˲ɽషಯˇʈ೻ࠬᎈʿ຾൬f͉ʱؓഐ؈՘
пุ˴ආБӔഄdΝࣛ͵Ⴍ׼ઠ༶ʈ೻ɺܔ୚ணචݬd࣬ኽணࠇ˙ࣩආБᐄ༶̙Б׌ʱ
ؓdಂঐԶ͊ԸᗳЧࣩԷணࠇɪʘਞϽf
關鍵字：橫渡線、折返效率

Evaluation and Suggestions for the Location of
Circular Line Crossover Section

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Chao-Yang Liao Jyh-Cherng Jong Fu-Lai Su Lung-Chun Chang 4
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Abstract
The Circular line, a pivotal route for connecting the Taipei metropolitan MRT network,
will be constructed and completed in three stages. Construction of the first stage, ranging
from Station Y6 to Station Y19, is in the process of planning and design. All stations in this
stage will be built in an elevated mode except Station Y6 which is to be built underground,
where a crossover section will serve as a temporary terminus for trains to turn back during the
first operation stage. Therefore, the location and length of the crossover section will impact
construction risks, costs, operation headways, etc.
This article focuses on evaluating train turn-back efficiency, construction risks, construction
costs based on three alternatives as follows: (A) moving the crossover section in front of Station
Y6 262 meters west, (B) moving the crossover section in front of Station Y6 389 meters west, (C)
moving the crossover section in front of Station Y6 547 meters west. The results show that there
are some construction difficulties and risks that cannot be resolved in alternatives A and B and
thus would not be recommended. Although alternative C will not meet the required 90-second
headway, it will satisfy the constraint of 2.5-minute headway during peak hours. Moreover,
alternative C will also significantly reduce construction risks and costs and the results of the
evaluation will contribute to DORTS' decision. The article also demonstrates that train operation
analyses have been conducted early in the detailed design stage of civil engineering, with the
hope that the proposed evaluation can be a reference for other MRT projects.
Keywords: crossover section, turn-back efficiency

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