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

Table 13

The deviation of the jacking force estimations for case B2.

Jacking distance (m)		Monitoring (kN)	The optimal estimation formula for case B1 (kN)	Theoretical estimation formula (kN)
13.5	Jacking force deviation	19199.2476	14535.25	13459.80
		N/A	−24.29%	−7.40%
28.5	Jacking force deviation	26240.99612	22828.59	17131.80
		N/A	−13.00%	−24.95%
43.5	Jacking force deviation	30225.99908	27521.87	20803.80
		N/A	−8.95%	−24.41%
58.5	Jacking force deviation	33018.00813	30810.13	24475.80
		N/A	−6.69%	−20.56%
73.5	Jacking force deviation	35169.11767	33343.57	28147.80
		N/A	−5.19%	−15.58%
88.5	Jacking force deviation	36919.31605	35404.85	31819.80
		N/A	−4.10%	−10.13%

Note: : y = 11099ln (x) − 14352; : y = 244.8x + 10155.