Bayesian Approach for Sequential Probabilistic Back Analysis of Uncertain Geomechanical Parameters and Reliability Updating of Tunneling-Induced Ground Settlements

Table 4

Expansion terms and coefficients of the 4^th order HPCE for the 1^st excavation step.

No.	Term	Coefficient	Value	No.	Term	Coefficient	Value
1	1	a0	12.08	19		a18	−0.03
2		a1	−1.38	20		a19	−0.02
3		a2	−0.32	21		a20	0.01
4		a3	0.57	22		a21	−0.05
5		a4	0.27	23		a22	−0.01
6		a5	−0.16	24		a23	0.04
7		a6	0.01	25		a24	0
8		a7	0.02	26		a25	0
9		a8	−0.15	27		a26	−0.03
10		a9	−0.01	28		a27	−0.04
11		a10	−0.10	29		a28	0.04
12		a11	−0.01	30		a29	−0.01
13		a12	0	31		a30	0.02
14		a13	−0.01	32		a31	0.04
15		a14	−0.01	33		a32	0.07
16		a15	0.06	34		a33	−0.03
17		a16	0.03	35		a34	−0.03
18		a17	0.09