Curtain Grouting in Hard Crystalline Rock Using Ultra-Low Viscosity Polyurethane Resin-PPT Presentation

PPT Presentation

Pdf Summary

The project addressed water leakage in a structure founded in hard crystalline rock. After assessing rock permeability through water-pressure (Lugeon) tests and core drilling through the bottom slab, a curtain-grouting layout was developed around the structure.<br /><br />The work used low-viscosity, two-component polyurethane resin injected through curtain boreholes. The selected resins had viscosities of approximately 125 and 300 mPa·s at 20°C, allowing the grout to penetrate rock fissures.<br /><br />Grouting substantially reduced leakage, from 42 to 16 and ultimately 2 m³ per day. As a result, the planned internal lining of the tank was no longer required.

Keywords

water leakage

crystalline rock

Lugeon tests

core drilling

curtain grouting

polyurethane resin

grout injection

rock fissures

leakage reduction

tank lining