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Detection of Shield Segment Displacement of a Natural Gas Pipeline in Yangtze River Tunnel
A natural gas pipeline in the Yangtze River Tunnel was constructed via shield method. When the shield machine entered the reception shaft, groundwater inflow and sand inflow occurred in the tunnel 10.2 m away from the inner wall of the reception shaft and led to segment displacement and ground collapse. Drilling was adopted to probe the shield segment displacement and the drill hole deflection was controlled by means of vertical shaft calibration of drill rigs using a perpendicular line, which strictly controlled the accuracy of the probe to determine the displacement of tunnel segments. Segment damage and disturbance were effectively prevented by drilling speed control and blank bit replacement. This detection method, with reasonable technology, meets the exploration accuracy and attains reliable exploration data so that it can provide a reference for similar engineering problems.
Detection of Shield Segment Displacement of a Natural Gas Pipeline in Yangtze River Tunnel
A natural gas pipeline in the Yangtze River Tunnel was constructed via shield method. When the shield machine entered the reception shaft, groundwater inflow and sand inflow occurred in the tunnel 10.2 m away from the inner wall of the reception shaft and led to segment displacement and ground collapse. Drilling was adopted to probe the shield segment displacement and the drill hole deflection was controlled by means of vertical shaft calibration of drill rigs using a perpendicular line, which strictly controlled the accuracy of the probe to determine the displacement of tunnel segments. Segment damage and disturbance were effectively prevented by drilling speed control and blank bit replacement. This detection method, with reasonable technology, meets the exploration accuracy and attains reliable exploration data so that it can provide a reference for similar engineering problems.
Detection of Shield Segment Displacement of a Natural Gas Pipeline in Yangtze River Tunnel
Yin, Xiansong (author) / Lv, Weiwei (author) / Xie, Liming (author)
International Conference on Pipelines and Trenchless Technology ; 2013 ; Xi'an, China
ICPTT 2013 ; 195-202
2013-10-01
Conference paper
Electronic Resource
English
Seismic effects , Yangtze River , Pipes , Leakage , Trenchless technology , Gas pipelines , Natural gas , Displacement , Pipelines , Assets , Tunnels
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