Assembly of Tunnel Boring Machines Begins in Trojena Ahead of NEOM’s Ambitious Mountain Tunnel Project
Trojena – NEOM | May 2025
In a key step toward launching one of the region’s most complex underground engineering operations, work has begun on assembling two “Double Shield” tunnel boring machines (TBMs). These are being deployed in the rugged mountains of Trojena, located in northwest Saudi Arabia, specifically for the Trojena NEOM tunnel project.
This phase marks a critical milestone in the construction of a new mountain tunnel. This Trojena NEOM tunnel will eventually house one of the world’s steepest suspended rail lines, part of NEOM’s groundbreaking vision for the future.
Tackling Harsh Terrain with Advanced Technology
The planned Trojena NEOM tunnel cuts through extremely rough and uneven mountainous terrain. This has prompted the deployment of this advanced TBM technology.
Double Shield systems are known for their ability to drill and install tunnel linings simultaneously. Thus, they reduce downtime and accelerate project progress significantly.
Project Overview:
- Location: Trojena Mountains – NEOM
- Purpose: Construction of a mountain tunnel designed to host the world’s steepest suspended railway
- Developer: NEOM, in collaboration with specialized international tunnelling and infrastructure teams
- Current Phase: Assembly and commissioning of advanced boring equipment
- Engineering Challenge: Multi-use tunnel within a geologically demanding environment
A Leap Toward a New Era of Mountain Mobility
This Trojena NEOM tunnel project reflects more than just engineering ambition. It’s a step toward redefining transportation and infrastructure in mountainous areas. Trojena aims not only to be a standout tourist destination but also a living lab for innovative, non-traditional architectural and infrastructural solutions.
ArchUp continues to follow this project as part of its ongoing documentation of architectural development across the Kingdom.
