Japan orders inspection on tunnels
Source: Agencies |
December 4, 2012, Tuesday
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Print Edition
Print Edition
JAPANESE officials ordered the immediate inspection of tunnels across the country yesterday after nine people were killed when concrete ceiling slabs fell from the roof of a highway tunnel onto moving vehicles below.
Those killed in Sunday's accident were traveling in three vehicles in the 4.7-kilometer Sasago Tunnel about 80 kilometers west of Tokyo. The tunnel, on a highway that links the capital to central Japan, opened in 1977 and is one of many in the mountainous country.
The transport ministry ordered inspections be carried out immediately on 49 other tunnels around the country that are either on highways or roads managed by the central government and of similar construction.
Police and the highway operator Central Japan Expressway Co were investigating why the concrete slabs in the Sasago Tunnel collapsed. An inspection of the tunnel's roof in September found nothing amiss, according to Satoshi Noguchi, a company official.
An estimated 270 concrete slabs, each weighing 1.4 tons, suspended from the arched roof of the tunnel fell over a stretch of about 110 meters, Noguchi said.
The operator was exploring the possibility that bolts holding a metal piece suspending the panels above the road had become aged, he said. The panels, measuring about 5 meters by 1.2 meters, and 8 centimeters thick, were installed when the tunnel was constructed in 1977.
Company President and CEO Takekazu Kaneko said the company was inspecting other tunnels of similar structure, including a parallel tunnel for traffic going in the opposite direction. Both sections of the highway were shut down indefinitely.
Recovery work at the tunnel was suspended yesterday while the roof was being reinforced to prevent more collapses, said Jun Goto, an official at the Fire and Disaster Management Agency
Yoshihiro Seto, an officer with the Yamanashi prefectural police, said they can't rule out there are more bodies or survivors in the tunnel, but the possibility is low. Goto said they hope to resume recovery work today.
Two people suffered injuries in the collapse.
Those killed in Sunday's accident were traveling in three vehicles in the 4.7-kilometer Sasago Tunnel about 80 kilometers west of Tokyo. The tunnel, on a highway that links the capital to central Japan, opened in 1977 and is one of many in the mountainous country.
The transport ministry ordered inspections be carried out immediately on 49 other tunnels around the country that are either on highways or roads managed by the central government and of similar construction.
Police and the highway operator Central Japan Expressway Co were investigating why the concrete slabs in the Sasago Tunnel collapsed. An inspection of the tunnel's roof in September found nothing amiss, according to Satoshi Noguchi, a company official.
An estimated 270 concrete slabs, each weighing 1.4 tons, suspended from the arched roof of the tunnel fell over a stretch of about 110 meters, Noguchi said.
The operator was exploring the possibility that bolts holding a metal piece suspending the panels above the road had become aged, he said. The panels, measuring about 5 meters by 1.2 meters, and 8 centimeters thick, were installed when the tunnel was constructed in 1977.
Company President and CEO Takekazu Kaneko said the company was inspecting other tunnels of similar structure, including a parallel tunnel for traffic going in the opposite direction. Both sections of the highway were shut down indefinitely.
Recovery work at the tunnel was suspended yesterday while the roof was being reinforced to prevent more collapses, said Jun Goto, an official at the Fire and Disaster Management Agency
Yoshihiro Seto, an officer with the Yamanashi prefectural police, said they can't rule out there are more bodies or survivors in the tunnel, but the possibility is low. Goto said they hope to resume recovery work today.
Two people suffered injuries in the collapse.
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