Water Sealing Blog - Tag: Tunnel
TBM Launch Pit Injection
Grouting contractor Sub-Technical, Inc. injects SealGuard II into a launch pit for a tunnel boring machine to stop water infiltration. SealGuard II is fast reacting a dual component polyurethane grout. In this instance, it was injected with a pneumatic pump and a mechanical packer. Note th... Read More
Category: Company Information
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TBM Water control Launch Pit Tunnel Rib
Rescuing a Turn of the Century Culvert under a New York Rail Line
As winter approaches, a heavy rain event proved to be “the straw which broke the camel’s back” for this turn of the century block and brick-built tunnel.
Heavy rains recently caused the loosening and partial collapse of the structure internally. Constructed of four row... Read More
Category: Company Information
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rail culvert tunnel repair sinkhole collapse
Concrete Segment Polyurethane Injection
Leaking concrete segments are injected with polyurethane grout in a tunnel that was created by a tunnel boring machine. The grout used was Hyperflex, which is injected as a liquid. The liquid material reacts with moisture and creates a hydrophobic foam to stop the infiltration.
... Read More
Category: Company Information
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TBM Segment Concrete Injection Seal leak Tunnel Grouting Polyurethane
Tunnel Grouting after a TBM
Tunnel boring with a TBM creates many opportunities for polyurethane grouting.
For instance, the tail seal brushes of a tunnel boring machine are coated with grease to act as a water barrier, as ground water needs to be kept in the front of the machine. Over time the brushes wear out an... Read More
Category: Company Information
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Tunnel water control. TBM Boring Machine Polyurethane Grout Concrete
CSO (TBM) Tunnel Leak Sealed by Sub-Technical
One hour and 55 gallons of chemical grouting & this leak was sealed by chemical grouting company Sub-Technical Inc using polyurethane grouts from SealGuard Inc.
This video shows the access shaft leading to the CSO (Combined Sewer Overflow) Tunnel that is part of the Storm ... Read More
Category: Industry News
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Sealguard II extreme leak cso tunnel tmb shaft
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