Estimations of the Jacking Forces of Large-Sized Rectangular Jacking Pipes Based on a Displacement Control Method

Table 12

The deviation of the jacking force estimations for case A2.

Jacking distance (m)		Monitoring (kN)	The optimal estimation formula for case A1 (kN)	Theoretical estimation formula (kN)
13.5	Jacking force deviation	16643.80665	7856.20	7510.6
		N/A	−52.80%	−54.87%
28.5	Jacking force deviation	17444.78865	12691.43	10294.6
		N/A	−27.25%	−40.99%
43.5	Jacking force deviation	18817.90065	15427.74	13078.6
		N/A	−18.02%	−30.50%
58.5	Jacking force deviation	20763.14265	17344.87	15862.6
		N/A	−16.46%	−23.60%
73.5	Jacking force deviation	23280.51465	18821.93	18646.6
		N/A	−19.15%	−19.90%
88.5	Jacking force deviation	26370.01665	20023.71	21430.6
		N/A	−24.07%	−18.73%

Note: : y = 6471ln (x) − 8985.8; : y = 185.6x + 500.