Hybrid Injection System
WEBAC® HIS
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Tunnel Face Pre-injection
Tunnel face pre-injection involves the preventive securing and stabilization of disturbed zones ahead of the working face in tunnel and adit construction. It is used in cases of unstable rock strata, loose or cavity-rich rock, and in water-bearing areas, and is combined with waterproofing measures as needed.
Depending on the tunneling method, different materials are used: In TBM tunneling, silicate resins that can be cut and planed, do not stick, and undergo rapid solidification are used, while in conventional tunneling, fast-reacting polyurethane systems with adjustable properties and a sealing effect are frequently employed.
Depending on the extent of the disturbance zones, supplementary measures such as face stabilization, shield grouting, or void backfilling may be necessary and contribute to the safe execution of the tunneling operation.
Downloads & Documents
Brochures & Flyer|PDF
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Products Used
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WEBAC HIS is a hybrid injection resin used as a reactive component for large-volume cement grouting and holds National Technical Approval. It is characterized by rapid strength development and cures even underwater to form a stabilizing and sealing material. The resin is used to secure Foundation Pits and tunnel structures, as well as for subsoil stabilization and void filling.
PU Injection Resins
WEBAC® PURseal M SL10
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View productWEBAC PURseal M SL10 is a PU injection resin with extended working and penetration times that has received DIBt approval for environmental compatibility when in contact with soil and groundwater. The resin cures into a compact, high-strength material without contact with water and reacts with a slight foaming effect when it comes into contact with water. It is used for subsoil stabilization and rock reinforcement, as well as for permanent waterproofing.
PU Injection Resins
WEBAC® PURseal M SL5
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View productWEBAC PURseal M SL5 is a relatively fast-curing PU injection resin. It cures into a compact, high-strength material without contact with water, but reacts with slight foaming when it comes into contact with water. The resin is used for subsoil stabilization and rock reinforcement, as well as for securing foundation pits and tunnel structures.
Silicate Resins
WEBAC® SILcompact M
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View productWEBAC SILcompact M is a non-foaming silicate injection resin with German Mining Approval. It offers excellent flow properties and cures very quickly into a compact material that can be cut and planed. The resin is used for stabilizing and sealing tunnel structures and in mining applications.
Silicate Resins
WEBAC® SILfill
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View productWEBAC SILfill is a low-viscosity silicate injection foam resin. Even without contact with water, it forms a fine-celled foam with a high expansion ratio and cures quickly into a material that can be cut and planed. The resin is used for shield injection in the immediate vicinity of TBMs, as well as for subsoil stabilization and rock reinforcement.
Silicate Resins
WEBAC® SILform
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View productWEBAC SILform is a silicate injection foam resin that foams and sets rapidly. It reacts with or without contact with water and cures into a pressure-resistant material that can be cut and planed. The resin is used for stabilizing and permanently sealing tunnel structures and in mining applications.
