Water Sealing Blog - Tag: Segment

Concrete Segment Polyurethane Injection

By Chris on 09-24-2019

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
Tags:   TBM Segment Concrete Injection Seal leak Tunnel Grouting Polyurethane 

Tunnel Grouting after a TBM

By Chris on 08-27-2019

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
Tags:   Tunnel water control. TBM  Boring Machine Polyurethane Grout Concrete