plunger grouting pump

High pressure plunger grout pump delivers compatible cement and bentonite-based mixtures for foundation treatment, tunnel grouting and underground filling. Its hydraulic double-plunger design provides stepless pressure and flow adjustment, allowing delivery to be matched to different injection stages. Powered by a 15 kW motor, the pump has a specified output range of 0–90 L/min and a pressure range of 0–100 bar. The pumping assembly features 85 mm plungers, a 190 mm stroke and ball valves, with a maximum permitted particle size of 8 mm. Two pulsation dampers help moderate delivery fluctuations during operation.

Applications of the double-plunger injection system:
Tunneling and underground engineering: Shield tunneling synchronous grouting, pre-support grouting (pipe roofing), and backfill grouting behind tunnel linings; ensures precise control of surface settlement and supports uninterrupted, high-flow continuous operations.
Mining engineering: Underground rock strata water-blocking and reinforcement, and goaf (mined-out area) infill grouting; explosion-proof double-plunger systems operate safely in high-gas environments, significantly reducing the frequency of underground equipment maintenance.
Water conservancy and hydropower engineering: Dam foundation curtain grouting and dam body seepage-proofing/reinforcement; stable high-pressure output ensures grout penetrates fine rock fissures, enhancing the seepage-proof performance of dam foundations.
Specialized engineering: High-pressure jet grouting, precision chemical injection for oil and gas fields, micropile foundation anchoring grouting, and borehole wall stabilization/leak sealing; suitable for a wide range of high-precision, high-pressure injection applications.

A low-wear plunger type grout pump is designed with attention to the components exposed to abrasive grout. For contractors handling cement and bentonite-based mixtures, wear performance affects maintenance frequency, pumping consistency and equipment availability throughout the project.

Plunger jet grouting pump working principle: Plunger reciprocating motion: The plunger reciprocates in the pump cylinder, changing the sealed volume to achieve the suction and discharge of slurry. High-pressure injection: The slurry is pressurized to more than 20MPa through a high-pressure pump and ejected at high speed through a nozzle, impacting and destroying the soil and forming a consolidated body.

High pressure triplex plunger grout pump application scenarios: Foundation reinforcement: used for grouting reinforcement of soft soil foundation to improve foundation bearing capacity and reduce settlement. Waterproof curtain: in tunnels, basements and other projects, a waterproof curtain is formed to prevent groundwater infiltration. Mining and tunnel engineering: used for advance support in tunnel excavation, mine surrounding rock reinforcement, etc. Soil improvement: improve soil properties through grouting to improve soil stability and impermeability.

A plunger grouting pump is a specialized piece of equipment designed for injecting grout materials, such as cement, bentonite, or chemical grouts, into soil, rock formations, or structures under high pressure. It is widely used in construction, mining, tunneling, and geotechnical applications for soil stabilization, foundation repair, waterproofing, and post-tensioning.