Page 167 - 捷運技術 第45期

捷運技術半年刊 第45期 159

環狀線潛盾穿越新店線大坪林站之設計分析與風險評估
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賴建名 黃啟修 蘇福來 張龍均 4
摘 要

近年來由於臺北捷運路網已陸續完成，而後續規劃興建中之路線或車站，與已營
運中的捷運設施，多有交會重疊之情形，故於設計分析上已不像過去來的單純，而地
工方面所採用的分析工具亦有必要提昇。但因為土壤與水的變異性，地工數值分析軟
體雖然程式功能日益強大，但卻難以掌握，如何能導入過去的經驗及回饋資料，使分
析預測的結果具有合理性，進而能「駕馭」分析軟體，並作為風險管控的依據。
本文即以環狀線工程需於捷運大坪林站旁深開挖和潛盾隧道穿越為例，說明如何
於既有經驗架構下選擇工法，並運用一維、二維及三維分析軟體，並比對不同軟體所
分析的成果，進而於設計階段進行風險評估檢討，並考量於施工階段佈設相關自動化
監測儀器進行風險管控，在整個工程的生命周期，使其(營運中捷運車站)遭受之風險
性降至最低，達到設計中預防、施工中管控及完工後監控之目的，確保在捷運工程持
續推動狀況下，仍能保障民眾「行」的安全。本文即說明此分析及評估過程，期能供
未來類似案例設計上之參考。
關鍵字：深開挖、潛盾隧道、捷運車站

An Evaluation of the Impact of Shield Tunneling on an Adjacent
MRT Station

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Chien-Ming Lai Chi-Hsiu Huang Fu-Lai Su Lung-Chun Chang 4
Abstract
Line after line of the Taipei MRT network has been completed over the past years and
subsequent routes are either under construction or being planned. Occasions often arise
where the routes and stations of the subsequent network overlap or intersect with the in-
service lines, causing the design of the later portion of the network to be much more complex
than the earlier portion. Therefore, in terms of geotechnical analysis, the finite element
analyses are more complex when tackling these intricate problems (through 1-dimensional,
2-dimensional and 3-dimentional analysis software). Due to the variability of soil and water,
the numerical analysis software for geotechnical engineering is not as straightforward as
those being used in structural analysis. The key to a successful geotechnical analysis relies
on the experience of the users and the quality of feedback data. In this article, the authors
use a case study of deep excavation for the Circular line passing beneath the Xindian line's
Dapinglin Station to demonstrate how analyses have been conducted with the analytical
software based on accumulated experience, comparison of various analysis results, and risk
assessment performed during the design stage.
Consideration is also given to the establishment of associated automatic monitoring
apparatus for risk control so as to reduce the impact on the in-service stations to the
minimum during construction, and further ensure the safety of MRT riders. The authors
hope the process of analyses and evaluations described in this article will provide useful
references for performing similar cases in the future.
Keywords: deep excavation, shield tunnel, MRT station

1 中興工程顧問公司臺北捷運環狀線DF111細設標工程師 lcm@mail.sinotech.com.tw
2 中興工程顧問公司台北捷運環狀線DF111細設標組長 chhuang@mail.sinotech.com.tw
3 中興工程顧問公司軌道二部技術經理暨台北捷運環狀線DF111細設標計畫經理 secdd188@sinotech.com.tw
4 中興工程顧問公司軌道工程二部部門經理 lc@sinotech.com.tw