Grout Pumpi

Grouting is done to decrease the hydraulic conductivity around underground structures such as tunnels and caverns. Rock grouting is a type of grouting which is now beings used at wide level. Cement grouts are usually used and pumped into joint and fractures of the rock formation. Piston type pump is usually used for high pressure rock grouting. Pulsation effect is expected when using this pump due to movement of piston. Principle of rock grouting remains the same for last few years and mobile grouting plant is often used for large tunneling project. It comprises an agitator, mixer and grout pump. The pump takes the grout from the agitator to the boreholes with the help of line hoses.

The principle of grouting technologies is injection of liquid grouting material into the rock environment or construction under pressure. When grouting is done, fissures and pores are filled with grouting material that hardens and connect the crumble parts of rock mass or grains of loose material. Grouting technologies are used mainly in Underground constructions as:

Applications of Grout Pump

#Tunneling

  • Filling of voids and caverns
  • Sealing and stopping water inflows into construction
  • Anchoring of soil and rocks
  • Stabilization of loose material in the foreland of excavation.

#Mining

  • Crossing of fault zones
  • Securing of the overburden
  • Lowering of permeability of the rock mass
  • Strengthening of coal in areas with rock burst risk

#Foundation of Buildings

  • Anchoring of walls of construction pits
  • Micro piling in soil with low bearing capacity

#Bridges & Roads

  • Repairing cracks in construction
  • Strengthening and sealing of brick and stone masonry on bridges

Inoculation of grouting material into the rock massive is done using grouting pumps. Piston type pump with electric or pneumatic drive is used. Grouting material is used while injecting grouting material into the rock mass. Grout pumps are precisely designed to transfer the pressure of the grouting material. It also prevents the back flow of the material from the borehole.