Research on the Prediction Model of Shield Advancement Rate in Sandy Cobble Ground of Beijing

Table 4

Result of multivariate regression parameters of the model.

Variable	Unstandardized coefficient		Standardized coefficient	t	Distinctiveness
	Regression coefficients	Standard error	Beta
(Constant)	−4.102	0.899		−4.560	0.000
	0.001	0.000	0.204	13.535	0.000
	1.676	0.059	0.528	28.402	0.000
	−1.726 × 10^−5	0.000	−0.086	−7.971	0.000
	−4.39 × 10^−4	0.000	−0.178	−16.096	0.000
	−6.700 × 10^−8	0.000	−1.191	−99.734	0.000
	0.003	0.000	1.714	60.253	0.000
	−18.395	0.929	−0.384	−19.794	0.000
	7.944 × 10^−8	0.000	0.468	29.932	0.000
	−1.777 × 10^−7	0.000	−0.399	−33.626	0.000
	0.003	0.000	0.409	24.593	0.000
	−2.298	0.111	−0.427	−20.615	0.000
	1.546	0.082	0.233	18.962	0.000
	−0.001	0.000	−0.476	−18.082	0.000
	6.966	0.395	0.289	17.655	0.000
	3.805	0.595	0.079	6.396	0.000
	−2.692	0.704	−0.036	−3.826	0.000
	−3.09 × 10^−4	0.000	−0.043	−3.554	0.000
	1.534 × 10^−5	0.000	0.032	2.286	0.022
	2.768	1.377	0.026	2.010	0.044