Hits:

Indexed by:期刊论文

Date of Publication:2009-01-01

Journal:Electronic Journal of Geotechnical Engineering

Included Journals:EI、Scopus

Volume:14 H

ISSN No.:10893032

Abstract:Earth pressure balanced TBM provides active support for working face by means of a pressurized earth paste with the consistency of a highly viscous liquid. The earth paste is produced from the excavated soil mixed with additives. The supporting pressure is achieved through control of the incoming and outgoing materials in the chamber. The soil-structure interaction in shield tunneling is investigated by analytical solution. The mechanism of working face stability is analyzed and the reasonable face earth pressure for EPB shield is deduced according to the active and passive earth pressure principles. The optimal thrust fore for EPB shield is proposed in different soil parameter and shield size cases. The comparison of the practical thrust forces of EPB shields with computed ones shows that the proposed computing procedure for optimal thrust fore for EPB shield can agree well with practical engineering examples. The effectiveness of the proposed computing procedure is validated. ? 2008 ejge.