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Comments on reply on India: How are the Kolkata East-West Line Tunnel Engineers fighting the TBM in water cavern problem?
Pankaj on India: How are the Kolkata East-West Line Tunnel Engineers fighting the TBM in water cavern problem? (): According to information I have their tbm tail brushes are not in good condition
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@Pankaj You were right about the tail brushes
"The seal of Chundee’s tail skin brush went off when it was boring a sand aquifer that contained large volume of water. Before Urvi started digging on Tuesday, it was fitted with new tail seal brushes, additional grease supply lines, cover plates for tail skin gap, extra grout holes and Bullflex seal"
http://timesofindia.indiatimes.com/articleshow/74215549.cms
Kolkata: TBM modified to avoid Bowbazar repeat | Kolkata News - Times of India
timesofindia.indiatimes.comTBM Urvi, which is completing the job left half-done by its twin Chundee after hitting an aquifer, has been refurbished in the most advanced way. Even