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Injection pump and mixer

An injection pump and mixer system is a critical setup used in various engineering applications such as tunneling, mining, construction, geotechnical works, and oil & gas operations. It is designed to mix grout or chemical solutions and then pump them under pressure into soil, rock formations, concrete structures, or behind tunnel linings for purposes like:
Soil stabilization, Crack sealing, Water cutoff, Void filling, Reinforcement of foundations.

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  Content   2025-05-30

A grout injection pump and mixer system delivers precise, high-pressure placement of grouts for soil stabilization, structural repair, tunneling, and foundation work.

Grout plant for tunnel project
Grout plant for tunnel project

Benefits of Using an Injection Pump and Mixer System:
Precise Injection: Controlled pressure and volume ensure accurate placement
Improved Safety: Stabilizes ground and structures
Cost Efficiency: Prevents expensive repairs and delays
Versatility: Works with various grouts: cement, resin, chemical
High Durability: Long-lasting structural reinforcement
Automation Ready: Integrates with monitoring and TBM systems

colloidal mixer agitator with pump
colloidal mixer agitator with pump

Working principle of injection pump and mixer:

  1. Material Preparation: Dry materials (cement, bentonite, etc.) and liquids (water, additives) are loaded.
  2. Mixing: The mixer blends ingredients into a homogenous slurry or paste.
  3. Transfer: Mixed grout is transferred to a holding tank or directly to the pump.
  4. Pressurization: The injection pump pressurizes the grout.
  5. Injection: Grout is injected through drilled holes or ports into the ground/structure.
  6. Flushing: After use, the system is flushed to avoid clogging.
injection unit for cementitious grout
injection unit for cementitious grout

 

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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.