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Metro replaces worn areas of Line 1 track
By Winter Zha |
December 6, 2012, Thursday
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Print Edition
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SOME tracks on Metro Line 1, in service for 20 years, are being replaced to reduce noise and eliminate vibration as trains pass, the city's subway operator said yesterday.
Problems such as cracks and subsidence have been found on the tracks, officials said. The replacement work, the first of its kind in the city on such a large scale, is expected to be finished next year, said officials Shanghai Shentong Metro Group.
"After a long time in service, the track incurs damage and becomes twisted," said a worker with the Metro maintenance department.
The aged sections of track were produced in 1992, the oldest among the Metro's 11 lines.
Replacement work starts after the system shuts down for the day, so that it doesn't affect service, said Shentong.
Track replacement work is now being conducted between Line 1's Caobao Road Station and the Shanghai Indoor Stadium Station. Most of the replacements are between Xujiahui Station and Shanghai South Railway Station, with five track sections involved.
Each of the new tracks is 100 meters long, making for smoother and stabler operation, compared with the current 25-meter-long ones, said workers.
There are replacement plans for tracks on other lines like 2, 3, and 4.
If sections are not replaced, it could jeopardize safety of passengers, said Metro authorities.
The pressure on the system is growing as new lines are put into service and passenger volumes increase. Each day the Metro handles an average of more than 6 million riders, and the number tops 7 million on peak days.
Routes in service for more than 10 years like Line 1 are evaluated for problems every three years, said Sun Jianping, director with Shanghai transport and port administration. Lines less than 10 years old are evaluated every five years. Evaluation work on Line 1 will be finished by year's end.
Passengers usually complain that the noise gets louder as the trains brake along the aged subway sections, officials said.
Shentong said it also checks tracks routinely at night to eliminate potential dangers. Small-scale repair and replacement is conducted at that time.
The total track is expected to expand to more than 800 kilometers over time.
Problems such as cracks and subsidence have been found on the tracks, officials said. The replacement work, the first of its kind in the city on such a large scale, is expected to be finished next year, said officials Shanghai Shentong Metro Group.
"After a long time in service, the track incurs damage and becomes twisted," said a worker with the Metro maintenance department.
The aged sections of track were produced in 1992, the oldest among the Metro's 11 lines.
Replacement work starts after the system shuts down for the day, so that it doesn't affect service, said Shentong.
Track replacement work is now being conducted between Line 1's Caobao Road Station and the Shanghai Indoor Stadium Station. Most of the replacements are between Xujiahui Station and Shanghai South Railway Station, with five track sections involved.
Each of the new tracks is 100 meters long, making for smoother and stabler operation, compared with the current 25-meter-long ones, said workers.
There are replacement plans for tracks on other lines like 2, 3, and 4.
If sections are not replaced, it could jeopardize safety of passengers, said Metro authorities.
The pressure on the system is growing as new lines are put into service and passenger volumes increase. Each day the Metro handles an average of more than 6 million riders, and the number tops 7 million on peak days.
Routes in service for more than 10 years like Line 1 are evaluated for problems every three years, said Sun Jianping, director with Shanghai transport and port administration. Lines less than 10 years old are evaluated every five years. Evaluation work on Line 1 will be finished by year's end.
Passengers usually complain that the noise gets louder as the trains brake along the aged subway sections, officials said.
Shentong said it also checks tracks routinely at night to eliminate potential dangers. Small-scale repair and replacement is conducted at that time.
The total track is expected to expand to more than 800 kilometers over time.
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