Introduction

Urban deep excavation projects — such as subway stations, underground car parks, and utility tunnels — often require vertical soil removal to depths of 30 to 50 meters. Traditional long-reach excavators or cranes are inefficient and unsafe in such conditions. That’s where the Clamshell Telescopic Arm offers a game-changing solution.

What Is a Clamshell Telescopic Arm?

A Clamshell Telescopic Arm is a heavy-duty extendable boom fitted with a clamshell grab, mounted on specialized machinery (often crawler carriers or base frames). It enables precise vertical excavation in deep, narrow shafts where conventional methods are either impractical or risky.

Deep Excavation Capability: Reaches depths up to 50 meters without the need for slope cutting

Precision Grab Control: Hydraulic clamshell bucket allows accurate soil removal

Compact Footprint: Ideal for congested urban job sites or limited-access basements

High Productivity: Rapid excavation cycles reduce overall construction time

Operator Safety: Remote operation keeps workers away from hazardous zones

Metro and subway station excavations

Urban basements and high-rise foundations

 Shaft construction for utilities (electrical, drainage, telecom)

Underground water tanks and treatment plants

Retaining wall and slurry wall excavation clean-up