Safety State Evaluation Method Based on Attribute Recognition Model for Ancient Timber Buildings

Table 7

Classification standards and evaluation index for foundation.

Grades	Evaluation indexes
	Bearing capacity or	Uneven settlement
		Uneven settlement is less than the allowable values in national code [37]; or no settlement cracks, deformations, and displacements
	1.0∼0.95	Uneven settlement is not greater than the allowable values in national code, and the settlement speed of the foundation is less than 2 mm/month in two months; or slightly cracks but no development sign
	0.95∼0.9	Uneven settlement is greater than the allowable values in national code; or the settlement speed of the foundation is more than 2 mm/month in two months; or the max width of cracks beyond 5 mm and no sign of stopping
		Uneven settlement is far greater than the allowable values in national code; or the settlement speed of the foundation is more than 2 mm/month in two months and tends to become faster; or the max width of cracks is beyond 10 mm and tends to become bigger

is the design value of pressure at the bottom of foundation; is the design bearing capacity of foundation soil.