北京地区土体硬化模型参数的试验研究及工程应用

本文通过北京地区某实际工程现场取样，通过室内三轴试验、固结试验确定该区域土体硬化模型参数，其中无论是强度参数还是刚度参数都大于勘察报告提供的参数，最后通过有限元分析软件Midas；GTS中修正莫尔-库仑模型模拟基坑开挖过程，并与工程实测数据对比来验证硬化模型参数的适用性。通过三轴试验、固结试验确定土体的强度参数及刚度参数更加符合原状土的力学性质，能够更加合理地预测基坑变形、支护结构受力等，为优化岩土工程设计提供了新的参考。

EXPERIMENTAL STUDY AND ENGINEERING APPLICATION OF SOIL HARDENING MODEL PARAMETERS OF BEIJING

In this article, through field sampling of a practical project in Beijing, determine the regional soil hardening model parameters through indoor triaxial test and consolidation test. Such as the strength parameters and stiffness parameters are greater than survey report provides. The finite element analysis software Midas GTS was used to simulate the excavation process of the foundation pit in modified Mohr Coulomb model, and compared with the measured data to verify the applicability of the model parameters. The strength parameters and the stiffness parameters of the soil determined by indoor triaxial test and consolidation test are more consistent with the mechanical properties of the undisturbed soil. These parameters can be used to predict the deformation of foundation pit and the force of supporting structure more reasonably. It provides a new reference for optimization of geotechnical engineering design.