Optimization of excavation supporting structure considering lateralreinforcement effect of CFG composite foundation on soils

The vertical reinforcement effect of CFG composite foundation has been thoroughly studied and widely used. The results of lateral deformation and lateral pressure of CFG composite foundation are scarce in the domestic or foreign relevant areas. The existing national and industrial norms are short of the regulation and guidance of excavation supporting structure design for CFG composite foundation under excavation conditions. The authors think that the lateral reinforcement effect of CFG composite foundation can not be ignored according to its vertical working mechanism. Based on the rules from numerical simulation and tracking survey data, combined with the monitoring feedback to excavations, the supporting structure of combining the double-row piles with the anchor cables for stage-bin of Jinan Provincial Capital Cultural Arts Center (Theatre) is optimized, which makes three rows of anchor cables to a row. Nevertheless, the construction monitoring results of the lateral deformation is only one-third of the relevant calculation, indicating that the lateral reinforcement effect of CFG composite foundation can reduces the deformation of supporting structure effectively, and it is worth of the industrial attention and study.