01

JSG - Jumbo-jet Special Grout

JSG (Jumbo-jet Special Grout) is a common ground improvement method. High-pressure slurry and air are injected through drilling rods to a set depth, replacing soil and forming cement columns.

This method improves soil strength, stability, and water sealing. It is widely used in MRT, underground, deep excavation, and foundation reinforcement works.

02

Low-pressure grouting injects cement or chemical materials into soil voids to solidify and improve ground conditions.

Using pressure below 30 kgf/cm², materials are injected by permeation or fracture methods to fill voids, block water flow, and enhance bearing capacity.

It is used for ground reinforcement, waterproofing, and shield tunneling works.

03

Chemical grouting uses special materials to penetrate soil voids, improving ground structure and sealing performance.

It is commonly applied to underground waterproofing and special ground improvement works.

04

Foundation reinforcement strengthens ground and structural stability, improving bearing capacity and ensuring safety.