JOG integrated computer grouting

JOG is our unique, world-leading, computer controlled, multi-point cementitious grouting process used for level correction and stablisation of structures, slabs and infrastructure.

jog integrated computer grouting

A unique process backed by over 20 years experience

JOG grout is cementitious with high-mobility. It does not affect ground water and has no detrimental biological implications. JOG provides many advantages:

  • Requires little or no excavation, only small injection holes
  • Creates little or no mess, noise or vibration
  • Quick and accurate to within a few millimetres.
  • Buildings can remain occupied during the re-levelling work
  • Uses strong inert cement grout 

grouting injection processComputers control the monitors, injecting via multiple ports a few seconds at a time, to gently raise the structure. Proprietary, high performance, low volume grout pumps deliver the grout to a multitude of injection ports set up in injection circuits. Each computer can be programmed to control up to 128 injection ports at once, enabling lifting of even very large areas of complex heavy structures. The design of the injection ports enables them to remain in place for the duration of the work.

Self-contained JOG batching plant (equipment, generator, materials and control centre) is generally housed within a shipping container to simplify transport and minimise our site ‘footprint’. The batching plant is also demountable from the container when necessary to access restricted areas of buildings or infrastructure.

Grout setting times can be varied from seconds to minutes as required. This enables hydraulic forces to be targeted and applied in specific locations over large areas. The hydraulic forces are continuously monitored and controlled, to effectively ‘float’ the structure gradually and safely back to a defined level, with minimal differential stresses induced in the structure.

grouting machineMonitoring is continuous with very fine increments of lift being reported to our modular control centre by a network of robotic survey stations or by laser levels. This data enables our technicians to make very fine adjustments to the computer controlled pumping, to ensure minimal differential stresses and accuracy of the levelling. Quality assurance techniques ensure voids are filled.

JOG has been used extensively to re-level structures suffering from settlement, from houses to flats, culverts to 12-storey buildings and with a record lift of 1300mm.

JOG technology has also been used to re-level 900mm and 1500mm diameter pipe lines at depths of 6m below ground surface level, working from inside the pipes.