文档介绍：Authors:-
au, Chang-Vu and Lai, Ching-Her
FINITE ELEMENT ANALYSIS OF DEEP EXCAVATION IN
LAYERED SANDY AND CLAYEY SOIL DEPOSITS
publication:-
CANADIAN GEOTECHNICAL JOURNAL
31, pp 204-214
Year of publication
1994
REPRODUCEDWITH KIND PERMISSION FROM:-
Canadian Geotechnical Journal
National Research Council of Canada
Ottawa
ON KIA OR6
Canada OX51GB
204
Finite-element analysis of deep excavation in layered sandy and clayey
soil deposits
CHANG-YU au
Department of Construction Engineering, National Taiwan Institute of Technology, ~O. Box 90-130, Taipei,
Taiwan, Republic of China
AND
CHING-HER LAI
Geotechnical and Environmental Engineering Department, Resources Engineering Services Inc. Taipei,
Taiwan, Republic of China
Received April 30, 1993
Accepted December 2, 1993
-- This paper presents an application of finite-element analysis to deep excavation in layered sandy and clayey soil
deposits using bination of the hyperbolic and the Modified Cam-clay models. In the analysis, the drained
behavior of cohesionless soil and the undrained behavior of cohesive soil were simulated using the hyperbolic and
Modified Cam-clay models, respectively. A rational procedure for determining soil parameters for each of the
models was established. A simulation of the dewatering process during excavation was proposed. The analytical
procedure was confirmed through an analysis of three actual excavation cases. Finally, analyses considering pore-
water pressure dissipation during the actual elapsed time for each construction phase were carried out. The results
indicate that the calculated displacement of a retaining wall during excavation is smaller than that given by undrained
analysis. It was thought that some degree of pore-water pressure dissipation actually occurs during the intermediate
thanexcavation would predicted This resultsby undrained in a decrease analysis. in the final deformation of the wall and. groun