Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-10-01

Journal: AUTOMATION IN CONSTRUCTION

Included Journals: Scopus、EI、SCIE

Volume: 46

Page Number: 22-29

ISSN: 0926-5805

Key Words: Shield machine; Earth pressure balance; Normal vector; Stability; Particle swarm optimization algorithm

Abstract: To ensure security during the excavation process of an earth pressure balance shield, this paper presents an optimal control method that accounts for the tunnel face's stability. The tunnel face is controlled by an optimal screw conveyor speed derived from the particle swarm optimization algorithm for a designed stable normal vector angle range on the distribution surface of the chamber pressure field. These normal vector angles can be computed online by measuring the changes to the earth pressure in the shield's chamber using a BP neural network model of the chamber pressure field distribution. An experimental example that uses excavation data from an actual EPB shield is given to illustrate the effectiveness of the proposed method. (C) 2014 Elsevier B.V. All rights reserved.