Patent ID: 11970830
Assignee: HAINAN UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC E  G | IPC E  G

Claim 0:
1. A method for quantifying bearing capacity of foundation containing shallow-hidden spherical cavities, comprising:
step 1: constructing a spatial axisymmetric calculation model for stability analysis of the foundation containing shallow-hidden spherical cavities comprehensively including a combined effect of spatial three-dimensional characteristics of a shallow-hidden spherical cavity, a self-weight stress of an overlying stratum with thickness h a virgin rock stress comprising a horizontal load of a virgin rock stratum (p0), and an external load borne by a ground (pz);
step 2: selecting a spherical coordinate system and obtaining a general solution which reflects a spatial stress distribution of a surrounding rock containing shallow-hidden spherical cavities through theoretical analysis based on the spatial axisymmetric calculation model using a Laplace displacement method;
step deriving mathematical expressions for calculating the bearing capacity of the foundation containing shallow-hidden spherical cavities by combining the general solution obtained through the theoretical analysis in step 2, a damage mode of ground collapse, and a Mohr-Coulomb strength theory;
step 4: determining the bearing capacity of the foundation by substituting data of a vertical load of stratum, a gravity density of a rock-soil layer, a Poisson's ratio of rock-soil mass, a thickness of an overlying stratum, and a radius of a spherical cavity that are measured into the mathematical expressions in step 3 for calculation.