Theoretical Study of a Design Method for Underexcavation in Building Rectification

Table 1

Comparison between the practical value and the calculated value.

Project	Case 1	Case 2
Floor	11F + 1F	6F
Design bearing capacity (kPa)	100	150
Adopted hole spacing (mm)	550	200
Theoretical hole spacing (mm)	550	180
Observed settlement (mm)	58	50
Calculated settlement (mm)	17.27	47.45

Note. η = 1.0.