Arch Engineers was called in to address critical challenges during the Thruster Excavation for a 4000mm deep entry pit needed for Pipe-Thruster machine installation. The project faced unforeseen difficulties when ground conditions differed significantly from the geotechnical report. This caused failed embedment and damage to the sheet pile wall. These issues became apparent during excavation, complicating the mitigation measures required to proceed safely.
Immediate action was required to prevent further damage and ensure safety. Any additional disturbances risked catastrophic failure. Arch quickly developed several revisions to the design. The first step involved patching the separated sheet piles, stabilizing the soil, and allowing excavation to continue. Then, Arch designed a strengthening system, including lower walers and beam struts beneath the Pipe-Thruster machine.
Maintaining a safe operating envelope for the thruster and pipe feed was critical. The revised designs required precise engineering and careful execution. The team worked under tight deadlines to ensure the project stayed on schedule.
Throughout the project, Arch prioritized safety due to the compromised sheet piles. They posed serious risks to excavation stability and worker safety. The revised designs were implemented with strict control, maintaining a secure work environment. Arch’s swift response and innovative engineering ultimately stabilized the site, allowing the safe installation of the Pipe-Thruster machine.