ABSTRACT
Behaviors of a large-diameter (3000 mm in diameter) pipejacking pipe in a very soft marine clay deposit are investigated by the use of a finite difference model, FLAC “Fast Lagrangian Analysis of Continua.” The pipe is modeled in between a highway embankment and an irrigation canal. Without the pipe, some portions of the embankment have a relatively low factor of safety and have notably been through large movements. Since large displacement modes are expected due to the very soft clay nature of the problems, FLAC, which utilizes the Lagrangian approach in arriving at solutions, is especially well suited to the above-mentioned problems. Soil-pipe-interactions are simulated and results are discussed in this paper. Horizontal displacements in the vicinity of pipe and the embankment are shown. Also, forces that are induced in the pipe are examined.
