MAA GROUP Consulting Engineering

A challenging underground environment

Lots CA450A, CA450 and CA441A of the Taiwan Taoyuan International Airport MRT Construction Project extend from the south end of Sanchong Station (A2 Station) in Sanchong City, Taipei County to Taipei Main Station (A1 Station) in Taipei City, with a total length of about 3.9 km. The lots include a 147 m long viaduct section, a 233 m long daylighting section, two 139 m long cut-and-cover sections on the Sanchong City side, a 110 m long segment on the Taipei City side, a 1,585 m long DOT (Double-O-Tube) shield tunneling section in the soft soils under the Danshui River and Taipei City and a 330 m long underground station (A1 Station).

Geotechnical risk management for double O tube tunneling

Geotechnical risk management is applied to the sections where nearby pipelines, structures and buildings may be affected during the construction. Risk management is also applied to DOT shield tunneling, the first ever double-tube tunneling technique introduced for the MRT system in Taiwan, and to obstacles (e.g., driftwoods and methane) encountered during tunneling.

Scope of work

• Evaluate potential risk events of geotechnical works and provide a risk management plan
• Execute geotechnical risk management
• Review Contractor’s plans and documents
• Provide professional technical and supervision consulting