Informational construction approach for deep excavation

An informational construction system for the safety evaluation of deep excavation in soft soil formation is presented. The optimization procedure using simplex method for numerical calculation was incorporated into a finite element program with Mohr-Coulomb plasticity model. It allows the optimization of “numerical soil parameters” from the measured diaphragm wall deflection by simulating the construction procedures. With the back analyzed soil parameters, prediction analysis can be carried out to predict the performance or potential problems in the later stages of construction. A case history is given to demonstrate the application of the method proposed.