Suhua Highway Improvement Project

Project Location

Yilan County & Hualien County,

Eastern Taiwan

Client

Directorate General of Highways (DGH)

Services Period

From January 2009

to 2021 (on-going)

Type of Services

Feasibility Study, Planning, Design and Construction Supervision Services

Project Overview

The Suhua Highway is part of the north-south direction Taiwan Provincial Highway No. 9 arterial and travels through very mountainous and steep terrain alongside and near to the eastern coast of Taiwan. The highway is often subject to serious or deadly landslides and the purpose of the project is to help improve the safety along the route and provide a reliable transport link for its users.

CECI began the feasibility study, planning and design of priority sections for making improvements to the Suhua Highway back in early 2009 which included the addition of 8 tunnels and 13 bridges.

Originally having a length of approximately 77 kilometers, three new sections having a combined length of 38.8 kilometers in mountainous areas of the highway were implemented to bypass dangerous sections of the previous route and in turn reduced the overall length of the highway to 53 kilometers and the traveling time by 60 minutes. The total length of the new tunnel works for these new sections is approximately 23.42 kilometers and includes the following tunnels built by drilling and blasting or the New Austrian Tunneling Method (NATM):

  • Suao Tunnel: twin tube single lane tunnels having a length of 240m.

  • Tungao Tunnel: twin tube single lane tunnels having a length of 3320m

  • Tungyeh Tunnel: twin tube single lane tunnels having a length of 200m.

  • Wuta Tunnel: twin tube single lane tunnels having a length of 460m.

  • Kuanyin Tunnel: twin tube single lane tunnels having a length of 7950m. 

  • Gufeng Tunnel: twin tube single lane tunnels having a length of 4650m.

  • Chungren Tunnel: twin tube single lane tunnels having a length of 3790m.

  • Renshui Tunnel: twin tube two-lane tunnels having a length of 2890m.

In addition to the tunnel works, other improvement works include  6.76 kilometers of at-grade road and 8.22 kilometers of viaduct structure.

Besides the grading and road works, associated works and ancillary structures for the project include

 

  • 3 weighing stations,

  • drainage works,

  • street lighting,

  • railing,

  • sound barriers and

  • electrical and mechanical engineering equipment and facilities (including power supply, traffic control, lighting, tunnel ventilation, fire-fighting equipment, etc.).

After having completed the design of the priority sections, CECI carried out construction supervision services for the 20 kilometer long segment from Nanao to Heping while all of the sections of the highway were completed and opened to traffic in January, 2020.

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CECI ENGINEERING CONSULTANTS, INC., TAIWAN

No. 323 Yangguang Street, Neihu District, 

Taipei City, 11491, TAIWAN

Tel: +886-2-87973567 Ext. 8310

Email: ob@ceci.com.tw

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