Products
Grouting / Backfilling
TG Method
Thixotropic Grout Method
TG Method
The TG Method (Thixotropic Grout Method) is a grouting technique designed to enable controlled injection even under underwater conditions. The grout has a rapid gel time and maintains a plastic state—a condition with no self-flow but capable of flowing under small pressure—for several minutes before hardening. This characteristic allows the material to fill voids completely without leaving gaps, ensuring effective backfilling. As a result, the TG Method offers easy construction, cost efficiency, and environmentally friendly performance in underground works.
TG Method : Material Composition
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TG-1
Special Bentonite
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TG-2
Plastic-State Slag Cement
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TG-3
Special Silicate
Required Performance of Backfilling Grout Material
The required performance of the backfilling material used to directly inject grout into the tail void generated at the tail section of the shield machine is as follows.
| Required Performance | |
|---|---|
| Excellent filling ability and minimal leakage outside the cavity | |
| Good flowability with no bleeding | |
| No volume reduction after hardening | |
| Uniform compressive strength and early strength development | |
| Minimal dilution by groundwater during injection |
Product Features
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1
Fast gel time with plastic state maintained for several minutes
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2
Injection method applicable even under underwater conditions
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3
Minimal shrinkage and alkali leaching
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4
Excellent long-term strength development due to slag cement base
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5
Maintains a semi-permanent service life
Gelation and Strength Development Process of Plastic-State Grout
