The invention provides a soil parameter dynamic
inversion analysis method suitable for a suspended deep foundation pit
engineering, which can circularly optimize inversion parameters and use the optimized parameters in numerical value
simulation prediction. According to on-
site monitoring conditions and parameter
sensitivity analysis, an inversion target and the reverse parameters are determined.Aiming at a multivariable problem of multiple soil layer parameters and multiple excavation step working conditions, a soil layer weight and an excavation step weight are introduced through calculation of an interval
influence coefficient, the multivariable problem is converted into a
single variable problem, and interval optimization analysis is executed through a least square method so as to determine an soil optimal parameter. In the soil parameter dynamic
inversion analysis method, a foundation pit excavation order is taken as a
back analysis progressive order, circulating calculation analysis of 'inversion-prediction-inversion again-prediction again' is executed for the parameters, with increase of excavation depth and the number of the soil
layers, the
soil parameters are continuously subjected to dynamic inversion and modification, the optimized parameters are used to the numerical value
simulation prediction, and compared with actual monitoring values, feasibility of the
inversion analysis method is verified, prewarning is provided for construction of the suspended deep foundation pit
engineering, and thus, the soil parameter dynamic inversion
analysis method has relativelyhigher application value.