Flexible Temporary Shield in Soft and Sensitive Clay: 3D FE Modelling of Experimental Field Test

Table 5

Construction sequence of FE modelling in PLAXIS-3D.

Phase	In the model	Drainage
Phase 0	Only soil elements (no structure)	procedure
Phase 1	Excavation (1^st layer, depth: 0.6 m) fissured brown clay	Drained
Phase 2	Excavation (2^nd layer: 0.6 to 2 m) brow clay	Plastic: undrained (soil model)
Phase 3	Adding structural element	Plastic: undrained (soil model)
Phase 4	Excavation (3^rd layer: 2 m to 6 m) sensitive blue clay	Plastic: undrained (soil model)

Note: the definition of undrained is discussed in construction step 2: phase 2.