Lecture 29 : Braced cuts [ Section 29.5 : Stability checks for designing a braced excavation: ]
Stability checks for designing a braced excavation
Stability against bottom heave
The analysis is a total stress analysis since the time of dissipation of pore water pressure is very less unless there is sandy deposit. Consider a stratified soil deposit in which braced excavation was carried out as shown in the figure.
Fig. 6.37 Excavation with diaphragm walls showing bottom heave
