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

Table 6

The calculation of jacking force based on the numerical simulation results (for case A1, driving distance 73.5 m, grouting pressure 0.13 MPa).

Element no.	σ22 (N.m^−2)	Element no.	σ22 (N.m^−2)	Element no.	σ22 (N.m^−2)
1	−1.14E + 06	13	−9.94E + 05	25	−2.07E + 06
2	−1.98E + 06	14	−9.93E + 05	26	−1.16E + 06
3	−2.83E + 06	15	−7.00E + 05	27	−7.31E + 05
4	−3.30E + 06	16	−5.38E + 05	28	−6.05E + 0
5	−3.32E + 06	17	−6.05E + 05	29	−5.45E + 05
6	−2.86E + 06	18	−7.36E + 05	30	−7.08E + 05
7	−2.02E + 06	19	−1.18E + 06	31	−9.96E + 05
8	−1.18E + 06	20	−2.09E + 06	32	−9.87E + 05
9	−7.44E + 05	21	−2.97E + 06	33	−7.04E + 05
10	−6.07E + 05	22	−3.41E + 06	34	−5.45E + 05
11	−5.73E + 05	23	−3.40E + 06	35	−5.72E + 05
12	−7.23E + 05	24	−2.95E + 06	36	−7.08E + 05

No. 1–36 element average of  = 1.45E + 06 N/m². The area of pipe section was 12.98 m². The jacking force = 1.45E + 06 12.98 = 18818.21 kN.