Cement grouting fills cracks or voids in soil and rock and permeates coarse, granular soils to create a cemented mass. It can be performed in tight access and limited space sites while minimizing disruption to normal facility operations.
- Create barriers to groundwater flow
- Underpin foundations
- Provide excavation support
- Stabilize and strengthen granular soils
Cement grouting, also known as slurry grouting or high mobility grouting, fills pores in granular soil or voids in rock/soil, with flowable particulate grouts. The grout particle size and void size must be matched properly to allow the cement grout to permeate. Depending on the conditions, Portland cement or microfine cement grout is injected under pressure at strategic locations through single port or multiple port pipes. The grouted mass has an increased strength, stiffness, and reduced permeability.
Cement grouting can offer an economic advantage for underpinning applications over alternative approaches such as removal and replacement or piling, and can be performed where access is difficult and space is limited. Since the effectiveness of cement grouting is independent of structural connections, this technique is readily adaptable to existing foundations and can typically be accomplished without disrupting normal facility operations.
Hayward Baker has developed proprietary equipment and software (iGroutTM) to allow real-time monitoring of all parameters during the cement grouting process. The operator can adjust the parameters (such as mix type, flow rate, pressure, and volume limits) based on the real-time acquisition of drilling and grouting data, while simultaneously monitoring for any movements or deflections of the ground or nearby structures. Data collected during drilling and grouting is recorded on a server that produces grouting reports, as well as CAD drawings depicting a visual representation of the completed work. Use of this advanced monitoring and control system increases accuracy, efficiency, and quality control of cement grouting.