Table 3 Evaluation of disturbance degree of different structured soils.

From: Effects of construction disturbances on tunnel displacement and the protective role of soil reinforcement in metro tunnels

Sample

Structural yield stress/kPa

Disturbance degree

Natural soil

132

0

2% cement

127

4%

1.5% cement

108

18%

1% cement

80

40%

0.5% cement

50

62%

Remolded soil

23

83%

Ideal Remolded soil

0

100%

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