Analysis of Braced Excavation with Pit-in-Pit Based on Orthogonal Experiment
In order to study the supporting structure under different distances between inner pit-in-pit and foundation pit, width and depth of pit-in-pit and general excavation depth of external foundation pit, PLAXIS is adopted to simulate the whole process of pit-in-pit excavation in a foundation pit of Shanghai. The factors which influence wall deflection are analyzed using orthogonal experimental design software. The results show that the factors which influence deformation of pit-in-pit and supporting structure of foundation pit are sorted with range value or sensitivity descending: depth of pit-in-pit, location of pit-in-pit, general excavation depth of external foundation pit, and width of pit-in-pit. Depth and location of pit-in-pit are the most two significant factors, and they have the strongest interactions.
Dongye Sun, Wen-Pei Sung and Ran Chen
T. P. Qian et al., "Analysis of Braced Excavation with Pit-in-Pit Based on Orthogonal Experiment", Applied Mechanics and Materials, Vols. 71-78, pp. 4549-4553, 2011