Research on the Algorithm for Composite Lining of Deep Buried Water Conveyance Tunnel

Table 1

Local layer parameters.

Number	Stratum	Density (10^3 kg/m^3)	Elasticity modulus (MPa)	Poisson’s ratio	Thickness (m)
1	Plain fill	1.60	3.8013	0.35	3.00
2	Silt	1.97	5.2993	0.29	3.20
3	Silty clay	2.02	5.9763	0.30	3.80
4	Fine medium sand	2.03	22.5000	0.20	2.36
5	Silty clay	2.02	20.4585	0.30	10.00
6	Fine medium sand	2.05	25.0000	0.25	10.00
7	Gravel-cobble	2.10	33.1470	0.15	1.59
8	Silty clay	1.98	10.9773	0.28	8.05