Study on the Division of the Affected Zone under Construction Unloading and Its Construction Sequence of the Multiline Parallel River-Crossing Pipe Jacking

Table 8

Calculation parameters.

Material type	Elastic modulus (Mpa)	Poisson ratio	Heavy γ (kN/m^3)	Thickness (m)
Pipe-jacking joints	28000	0.2	23	0.3
Topside shields	206000	0.3	78.5	0.06