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GEO5 Software

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Upheavel Check according to Chinese Standard

This verification follows the Prandtl analysis of foundation soil bearing capacity.

Upheavel check scheme - Prandtl slip surface

Verification is done using a safety factor approach and follows formulas:

where:

SFu

-

safety factor of upheaval

γm1

-

weighted average value of the soil unit weight behind the structure

γm2

-

weighted average value of the soil unit weight in front of the structure

ld

-

embedded depth of the structure

h

-

depth of the foundation pit

q0

-

uniform load on the terrain

Nc, Nq

-

coefficients of bearing capacity

c, φ

-

cohesion and internal friction angle of soil below the bottom of structure

Note: If there are more several layers of soil below the bottom of the structure, the software calculates the safety factor of upheaval for every layer. Depth of layer from the ditch bottom (D) is used instead of embedded depth (ld) .

Principle of the verifciation in case of a layer in a depth D

Literature: JGJ 120-2012

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