Page 213 - 捷運技術 第44期

捷運技術半年刊 第44期 207

大區域深開挖工程－以機場捷運臺北站工程為例

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陳鴻濤 林合洲 林恆次 3

摘 要

大臺北都會區人口密集大樓林立且交通繁忙，大眾捷運系統建設的推展確實為民

眾帶來極大的方便，惟為減少對整體環境之衝擊，多採用地下結構系統，因此站體區
之深開挖工程即成為施工重點，尤其於系統交會處，更有其超深開挖之需求。本文以
新北市政府推動捷運「三環三線」中第三環之主要部分：臺灣桃園國際機場聯外捷運
系統計畫，位於大臺北都會區中心－臺北車站特定專用區內之端點站也是臺北市唯一
車站－臺北站為例，介紹都會區內之大面積深開挖工程之設計、施工及管理。
台北站做為機場捷運之端點站，除了將國家門戶延伸至首都外，地面上將聳立
兩棟高56層及76層之共構聯合開發大樓，具有提升臺北西區都市發展及國家形象之
功能，大樓基地呈長梯型，東西向約350公尺，平均寬約80公尺，橫貫台北車站西側
C1、D1用地及重慶北路，面積2.8公頃，約4個足球場大，地下共設計四層，開挖27.1
公尺深，總土方開挖量逾80萬立方公尺，可為大區域深開挖工程之代表案例。

關鍵詞:大區域深開挖、景美層袪水、高風險管控

Deep Excavation over a Large Area－Taking Taiwan Taoyuan
International Airport Access MRT System's Taipei Main Station as
an Example
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1
Chen Hong-tao Lin Ho-chou Lin Heng-tzu 3
Abstract
For a city like Taipei with heavy traffic and a high density of high-rise buildings, the
development of the MRT system has brought great convenience to residents. In order to
minimize the impact on the overall environment, most Taipei MRT routes were constructed
underground. As a result, deep excavation at the stations has become a key part of system
construction with especially deep excavation needed for the transfer stations.
This paper aims to conduct a case study of Taipei Main Station in Taipei Main Station
District and introduce the design, construction, and management of a large-area excavation.
As a terminal station of the line that will connect the city to Taoyuan International Airport,
Taipei Main Station not only extends the nation's main gateway beyond Taipei, the capital
of Taiwan, but also bears the function of boosting urban development in western Taipei.
Meanwhile, the national image will be highlighted with the 56-story and 76-story joint-
development buildings. The trapezoid-shaped site, situated on Chongqing North Road and
Taipei Main Station District Parcel C1/D1 west of Taipei Main Station, will be about 350
meters long from east to west with an average width of 80 meters. In total, it covers 2.8
hectares, equal to some four soccer fields. The excavation is 27.1 meters deep with total
earth excavation of 800,000 cubic meters, making it a representative example of large-area
excavation.

Keywords: deep excavation over a large area, dewatering for Jingmei layer, high-risk control

1 臺北市政府捷運工程局北區工程處副處長 htchen@trts.dorts.gov.tw
2 臺北市政府捷運工程局北區工程處幫工程司 hclin@trts.dorts.gov.tw
3 臺灣世曦工程顧問股份有限公司工程師 htlin@ceci.com.tw

D6-大區域深開挖工程.indd 207 2011/10/21 下午 06:28:11