STUDY ON THE STRESS STATE CHARACTERISTICS OF IN-SITU SOIL
Currently,theories and methods for determining soil strength and foundation bearing capacity are numer-ous.However,the existing design bearing capacities are derived from empirical and statistical methods that reduce ultimate loads with considerable randomness and variability.To mitigate this uncertainty and reveal the in-situ stress state of soil,this paper applies structural stress state theory to model the soil stress state using load plate settle-ment test data.First,the measured settlement data are converted into generalized work of force(GFW)to form char-acteristic parameters representing the soil stress state.Then,the Mann-Kendall(M-K)criterion is used to identify abrupt changes in the characteristic parameters along the load variation curve.Finally,the soil's effective bearing ca-pacity obtained through structural stress state analysis is compared with the current Chinese standard results.The re-sults indicate that applying structural stress state theory can further determine the actual soil strength and elas-tic-plastic branch(EPB)strength,and the EPB strength can be directly used as the design load for soil,allowing for a more rational design of foundation bearing capacity while ensuring safety.
in situ soil massload plate settlementelastic state of soilsafety margin
万方数据
维普
