Performance evaluation of the MT-pile? applied in the IBIS Amsterdam project

摘要

Within the project 'Extension of the Amsterdam IBIS Hotel' the MT-pile? has been applied. The pile is installed using a vertically driven Tunnel Boring Machine. At the time of the design, no proven models or parameters were available for this large diameter casing pile. Loss on effective stress at the pile tip was of most concern, resulting in unacceptable pile settlement. The monitoring program applied during construction resulted in load settlement curves for each pile. These curves indicate a uniform, direct pile response and a maximum pilehead settlement of 20 mm at completion of the project. These results indicate that the loss of effective stress at pile tip level is compensated during construction of the pile and that the MT-pile can be modelled without loss of soil stress.