Table 1 Stratigraphic resistance coefficients ks table.

From: Analysis of shield tunnel response to bilateral pit excavation with a focus on perimeter pressure and deformation mechanisms

Soil behaviour

Soft soil, chalky soil

Sandy soil

Grade from soft to hard

I

II

III

V

I

II

III

V

ks (104kN/m3)

0.3–1.5

1.5-3.0

3–15

> 15

0.3–1.5

1.5-3

3–10

> 10.0

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