Abstract:

Through a series of physical property tests, consolidation tests, and unloading-reloading tests conducted on undisturbed soil samples of silty clay, silt, silt, and fine sand in the first stage terrace of Wuhan, the indoor experimental values of modified Mohr-Coulomb model parameters such as Eref oed, Eref 50, Eref ur, c', φ', Rf of typical soil layers in the first stage terrace of Wuhan were directly obtained. The relationships among different modulus parameters of typical soil layers in Wuhan area were analyzed with experimental data, adjusted experimental data, and empirical data from other regions of China, and the effective strength indexes were compared with the current provincial standard specification. The parameters obtained from this experimental study can be comprehensively selected and applied in areas with similar engineering geological background conditions, and can also provide useful references for geotechnical engineering finite element parameter inversion analysis, parameter sensitivity analysis and parameter applicability correction based on actual foundation pit engineering finite element modeling experience and monitoring data of foundation pit engineering examples.

Key words: Yangtze river first stage terrace, numerical simulation, modified Mohr-Coulomb, hardening model parameters, foundation pit engineering