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Injection unit for cementitious grout

An Injection Unit for Cementitious Grout is a specialized system designed to mix and inject cement-based grouts into soil, rock formations, concrete structures, or behind tunnel linings. These units are widely used in geotechnical engineering, tunneling, foundation repair, and structural reinforcement projects.

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  Content   2025-05-30

A cementitious grout injection unit is a purpose-built system designed for mixing, pressurizing, and precisely placing cement-based grouts in applications like soil stabilization, rock anchoring, void filling, and structural repairs.

injection unit for cementitious grout
injection unit for cementitious grout

Applications of injection unit for cementitious grout:
Tunnel Construction:
Used for soil stabilization, water sealing, and rock consolidation.
Ensures the stability and safety of tunnels during and after excavation.
Mining Operations:
Used for ground support, water control, and shaft sealing.
Enhances the safety and productivity of mining activities.
Civil Engineering:
Applied in dam foundations, slope stabilization, and underground construction.
Provides long-term durability and stability to structures.
Structural Repair:
Used for repairing cracks in concrete structures, sealing joints, and reinforcing weakened areas.
Extends the lifespan of buildings, bridges, and other infrastructure.

injection pump and mixer
injection pump and mixer

Types of Cementitious Grout Used:

Type Application
Cement + Water Grout Basic applications like crack sealing
Cement + Sand + Additives For filling large voids or structural support
Microfine Cement Grout Penetrates fine cracks and porous media
Expansive Cement Grout Prevents shrinkage and fills gaps tightly
Sulfur-Resistant Cement Grout Used in aggressive environments (e.g., sewage tunnels)
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Injection grout plant (grouting plant/grouting equipment system) is an integrated equipment system for grout preparation and injection in geotechnical engineering, construction and geological disaster management. Its core functions, technical features and application scenarios are as follows:
Core functions and equipment composition
Grout preparation system
Double-shaft mixer: adopts variable frequency speed regulation technology to achieve accurate proportioning of raw materials such as cement, water glass, bentonite, etc. (proportioning accuracy ±1%) to ensure slurry uniformity.
High-speed pulping machine: through the action of centrifugal force (speed ≥1450r/min), the powder is quickly dissolved, and the preparation efficiency is increased by 40% compared with traditional equipment, which is suitable for ultra-fine cement-based slurry.
Automatic batching system: integrated with screw conveyor, electronic scale and PLC controller to realize automatic metering and transportation of raw materials and reduce manual intervention.
High-pressure injection system
Piston pump group: adopts three-cylinder single-acting reciprocating pump (such as SGB6-10 type), with an output pressure of more than 10MPa and a flow rate of 6-10L/s, supporting single-liquid slurry and double-liquid slurry (cement-water glass) injection.
Intelligent control system: real-time monitoring of grouting pressure, flow and cumulative grouting volume, automatic generation of construction records (in compliance with GB/T 50448-2015 specifications), and support for cloud data storage and traceability.
Explosion-proof design: For high-risk environments such as coal mines, the equipment is equipped with explosion-proof motors, intrinsically safe circuits and pressure relief valves to ensure construction safety.