Abstract When the construction of the 2# inclined shaft work area of the super-long tunnel of Yingpanshan on the Huaping-Lijiang Expressway in Yunnan Province is tunnelled to ZK26+188, a large-scale continuous water and mud inrush occurred at the tunnel face. In response to shaft flooding and long-term water inflow at the inclined shaft mouth caused by water and mud inrush at ZK26+188, the mechanism of water inrush is analyzed and studied. Three treatment plans are comprehensively compared, and a water discharge treatment plan of "temporarily put aside the inclined shaft, discharge high-pressure water from main tunnel work area, implement the plan in phases, and steadily approach the head of the inclined shaft" is proposed. The water discharge problem is successfully overcome, and the water in the inclined shaft is safely discharged. The treatment plan has significant comprehensive benefits such as safety and economy, and can provide guidance and reference for the treatment of geological disasters in similar super-long, high-pressure, water-bearing karst tunnels.
Abstract：
When the construction of the 2# inclined shaft work area of the super-long tunnel of Yingpanshan on the Huaping-Lijiang Expressway in Yunnan Province is tunnelled to ZK26+188, a large-scale continuous water and mud inrush occurred at the tunnel face. In response to shaft flooding and long-term water inflow at the inclined shaft mouth caused by water and mud inrush at ZK26+188, the mechanism of water inrush is analyzed and studied. Three treatment plans are comprehensively compared, and a water discharge treatment plan of "temporarily put aside the inclined shaft, discharge high-pressure water from main tunnel work area, implement the plan in phases, and steadily approach the head of the inclined shaft" is proposed. The water discharge problem is successfully overcome, and the water in the inclined shaft is safely discharged. The treatment plan has significant comprehensive benefits such as safety and economy, and can provide guidance and reference for the treatment of geological disasters in similar super-long, high-pressure, water-bearing karst tunnels.
LANG Zhijun LI Mangyuan QIAO Haiyang
.Key Technologies for Treating Large-scale Water and Mud Inrush in Inclined Shaft Work Area of Super-long Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(5): 224-233
2023, Vol. 60 