TRIS Online Record

Printable View

Title	THERMOCHEMOMECHANICAL ASSESSMENT OF GROUND IMPROVEMENT BY JET GROUTING IN TUNNELING
Accession No	00961647
Authors	Pichler, C; Lackner, R; Spira, Y; MANG, H A
Journal Title	Journal of Engineering Mechanics Vol. 129 No. 8
Corp. Authors / Publisher	American Society of Civil Engineers
Publication Date	20030800
Description	p. 951-962; Figures(25); References; Tables(4)
Languages	English
Abstract	Horizontal jet grouting (HJG) is employed in urban tunneling to reduce surface settlements and, hence, to avoid damage of infrastructure and surface buildings. The widespread use of HJG raises the question of its efficiency. In order to answer this question, sophisticated thermochemomechanical material models for jet-grouted soil mass and shotcrete are employed in the context of plane-strain finite element analyses. For these analyses, the process of ground improvement, the excavation of the tunnel, and the installation of the shotcrete lining are considered. The results provide first insight into the load-carrying behavior of the compound structure consisting of the jet-grouted soil mass, the shotcrete lining, and the surrounding soil. The influence of the different creep characteristics in jet-grouted soil mass and shotcrete, resulting in a redistribution of loading, is highlighted. Moreover, the reduction of plastic loading of the soil in consequence of HJG, which is described by means of a multisurface viscoplasticity model, is illustrated. Based on the obtained numerical results, application of HJG results in a reduction of surface settlement by more than 50% in comparison to a tunnel which is only supported by a shotcrete lining.
TRT Terms	Mechanical analysis ; Reinforcement (Engineering) ; Settlement (Structures) ; Shotcrete ; Soil stabilization ; Thermochemistry ; Tunnel supports ; Tunneling ; Underground structures
Other Terms	Horizontal jet grouting
Subject Areas	H21 FACILITIES DESIGN; H62 FOUNDATIONS (SOILS); I21 Planning of Transport Infrastructure; I42 Soil Mechanics
Availability	American Society of Civil Engineers Find a library where document is available Order Document: http://worldcat.org/issn/07339399
TRIS Files	HRIS
Database	TRIS Online

TRIS is a bibliographic database funded by sponsors of the Transportation Research Board (TRB), primarily the state departments of transportation and selected federal transportation agencies. TRIS Online is hosted by the National Transportation Library under a cooperative agreement between the Bureau of Transportation Statistics and TRB.