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Vibration in Tainan park may remain
ENGINEERING PROBLEM:
While a model has been built to simulate a passing high-speed train near the new industrial area, an official said the effictiveness of countermeasures can't be immediately known
STAFF WRITER
Monday, Jan 21, 2002, Page 17
The actual effectiveness of vibration-dampening measures for the north-south high-speed rail near the Tainan Science-based Industrial Park (台南科學園區) can't be known until the railway is up and running, a National Science Council official said.
According to local media reports, the unnamed official said that while standards for the project have been based on simulations, whether or not the measures the council is proposing will meet expectations cannot be fully known until the railway is operational.
The council will publicize the details of the project, which could include building vibration-dampening trenches between the railway and high-tech manufacturing operations, the reports said. Companies interested in the project can begin submitting bids next month, according to the reports.
The railway, which is being built at a cost of NT$446 billion under a build-operate-transfer model, will link Taipei and Kaohsiung, with some other stops.
The Taiwan High Speed Rail Corp (台灣高鐵), which is building the system was confronted last year by high-tech that were concerned about the impact of vibrations from trains on their sensitive manufacturing equipment.
Last June, Taiwan High Speed agreed to change the design of the elevated track that runs through the park.
The council is blame for the problem since planning for the park began well after the route of the train was established. As a result, the council constructed a mock viaduct to simulate the path the train will take through the park and has run tests to evaluate what responses it can take to reduce the impact of the passing train, the reports said.
The council's mishandling of the issue was reinforced during the dispute when it urged the railway to restrict vibration levels to 36 decibels (dbs). The figure was considered to be absurd since background noise had already been measured at 48dbs at the site when it was still just a rice paddy.
A US Federal Railway Administration reported in a 1998 study that strengthening the foundations of buildings in areas nearby the railway could effectively reduce vibrations, while the placement of insulated trenches between the railway and neighboring structures could also reduce vibrations.
Taiwan Semiconductor Manu-facturing Co (台積電) will build a wafer fab in the park. It will be joined by more than 120 other manufacturers.
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