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January 18, 2012

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Home » Metro » Public Services

Holiday closure for Metro Line 4 stops

Ten stations will be off limits to passengers on Line 4 of the Shanghai Metro during the Spring Festival holiday after the line's Hailun Road station is closed for repairs.

However, the stations will still be accessible as they are also stops on Line 3.

Hailun Road is also a station on Line 10 and that service will also be unaffected.

Repair work at the station, needed after uneven subsidence, will begin late on January 22, Chinese New Year's Eve, officials with Shanghai Shentong Metro Group said yesterday.

Line 4 will then operate as a C-shaped section with 16 stops from Yishan Road to Linping Road from January 23 to 28. Normal operations will resume after the holiday.

"We expect the repair work to be a relatively smooth operation," said Zhang Lingxiang, deputy general manager of the Metro operation management center.

Passenger volume will be reduced because of the holiday and operators estimate a 40 percent drop at the station in passenger numbers.

Wang Rulu, chief engineer at the Metro maintenance center, said track, signals and the power supply system would be renovated at the Hailun Road station and repairs will be carried out "around the clock" during the seven-day holiday.

Wang blamed the uneven subsidence on the loose earth structure beneath the station.

The situation at the station was complex, Wang said, as it was a transit section with both elevated and underground tracks.

Subsidence has long been a problem for Shanghai because of the city's rapid development and relatively loose earth structure and is one of the major threats to Metro operations.

Besides the Hailun Road station, three other Metro stations are subject to a high risk of subsidence and are under strict monitoring, said Wang. But he refused to disclose which they were or give further details.

The situation is stable at other stations on the city's booming underground network, construction and traffic authorities have said.

Metro operators have set up more than 200,000 monitoring points along the 425 kilometers of the Metro's 11 lines currently in service and three other lines under construction.

Engineers and experts have been warning of increasing risks as builders dig deeper to develop underground spaces and said future structures below ground required improved daily monitoring and more sophisticated engineering methods.

Many newly built Metro stations have reported frequent water leaks and cracks soon after they opened. Authorities attributed the problems to "poor construction quality and the unstable state of the land."


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