Abstract
To explore the effect of stress state on the bearing characteristics of foundation soil, this study proposed a self-developed plate loading test system. The system can be used to simulate the actual stress state of foundation soil within a given stratum, achieve uniform loading or gradient loading of lateral stress in simulating the k0 consolidation state, and simulate overburden stress around the foundation under the two loading modes. This study conducted plate loading tests on siliceous sand foundation under different loading modes using this system. It was found that (Ι) the bearing capacity and deformation modulus of foundation soil measured by the system under flexible loading were greater than those measured under rigid loading. Also, foundation settlement was smaller under flexible loading. (ΙΙ) Vertical stress in foundation soil was relatively uniform under both loading modes and was more uniform under flexible loading.
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