WANTED

Salvex is seeking one hard rock double shield tunnel boring machine (DS-TBM) with a boring diameter of 11 meters or greater for an active buyer. Sellers with a matching large-diameter machine available for sale, whether used, reconditioned, or surplus, are invited to submit availability. Complete systems including backup are of primary interest, but sellers with the main machine only are also encouraged to respond.

Requirement: Hard Rock Double Shield Tunnel Boring Machine (DS-TBM)
Boring Diameter: 11 meters or greater
Quantity: 1 Unit

Preferred 
Complete system including cutterhead and backup gantry
Exact boring diameter
Reconditioning or refurbishment history and scope
Year of manufacture and original equipment manufacturer
Hours or meters bored and prior project history
Main drive power, thrust force, and installed power ratings
Cutterhead configuration (segments, cutter size, cutter count)
Current condition and availability status
Location and transport / disassembly status
Available documentation and records

Overview

A double shield tunnel boring machine is a hard rock excavation system that bores and lines a tunnel in a continuous cycle, gripping the tunnel wall to advance while segment lining is installed under the protection of the shield. These machines are diameter-specific and close to bespoke, and large-diameter units of 11 meters and above are among the largest and highest-value tunneling assets built, with a correspondingly small population in service worldwide.

Salvex is working on behalf of a qualified buyer and can move quickly on a suitable match. Given the scarcity of machines at this diameter, sellers are asked to provide full specifications, condition, provenance, location, and available documentation so the buyer can assess diameter and geology suitability. Both complete systems and main-machine-only offerings will be considered, as will machines requiring refurbishment to meet the requirement.

Sellers who should respond
Tunneling and heavy civil contractors with surplus or idle large-diameter machines
TBM refurbishers and resellers
Equipment lessors and asset managers holding tunneling equipment
Project owners and JVs with completed large-bore drives disposing of plant
Manufacturers and dealers with reconditioned large-diameter stock

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Frequently Asked Questions (FAQs)

What exactly is being sought?
One hard rock double shield tunnel boring machine with a boring diameter of 11 meters or greater. Sellers with machines at or above this diameter are invited to respond.

Is there an upper diameter limit?
The requirement is 11 meters or greater. Sellers should state the exact boring diameter of their machine so the buyer can assess suitability for the intended drive.

Does the machine need to be complete with a backup system?
A complete system including cutterhead and backup is preferred, but main-machine-only offerings will also be considered. Sellers should state exactly what is included.

Does condition matter?
Used, reconditioned, and refurbishment-candidate machines are all of interest. Sellers should describe current condition, reconditioning history, and any known refurbishment requirements.

What information should a seller provide?
Manufacturer, year of manufacture, exact boring diameter, main drive and thrust specifications, cutterhead configuration, hours or meters bored, current condition, location, and available documentation.

Does the manufacturer matter?
Sellers of any reputable make are encouraged to respond. The buyer will assess suitability based on specification, condition, provenance, and refurbishment scope.

How quickly can the buyer move?
Salvex is working with a qualified, active buyer and can proceed promptly on a suitable match, subject to inspection and diameter/geology assessment.

How do I respond with a machine?
Contact Salvex with your machine's specifications, exact diameter, condition, location, and asking price. Salvex will coordinate between the parties.

Where does the machine need to be located?
Location is open. Sellers should state the machine's current location; the buyer will assess transport, disassembly, and mobilization as part of the evaluation.