Measures for the Treatment of Large Deformation of the Inrush Mud Section of the Water-rich Shallow Buried Loose Surrounding Rock Tunnel
During the construction of tunnels with loose surrounding rock,there is a significant risk of water and mud inrush.Careless handling can easily lead to secondary accidents,resulting in significant losses of personnel and property.Based on the large deformation accident of the water and mud inrush section of the left line Z2K219+077 and the right line K219+081 of the Niulangang Tunnel,this study conducts a thorough examination of the diverse risk factors and reasons behind the accident occurred during the project's construction phase,and proposes a method of reinforcing the surrounding rock with a curtain grouting ring of the vault in the cave,and using the temporary grouting wall to stabilize the tunnel face to suppress the water and mud inrush and the large deformation of the vault.Based on the actual monitoring and measurement data collected on-site,it has been confirmed that this approach effectively mitigates the vault settlement rate during tunnel construction,and has practical feasibility for dealing with the large deformation problem of water inrush and mud inrush section.
water-rich shallow buried tunnelswater inrush and mud inrushlarge deformationdisposal measures
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