Bencor provides a variety of specialized, geologic-specific drilling and grouting technologies. We develop and engineer numerous grouting programs and procedures, which assist in determining the optimum level of grouting and customizing of designs for site-specific applications.

Common Uses

  • Pre-excavation Soil Treatment
  • Excavation and Foundation Support
  • Shaft Grouting
  • Grout Curtain
  • Dam Foundation Grouting (Dam & Levee Rehabilitation)
  • Soil Stabilization / Ground Consolidation
  • Settlement Mitigation
  • Void Grouting
  • Sinkhole Mitigation
  • Groundwater Intrusion Mitigation
  • Seepage Barrier / Cutoff Wall
  • Tunneling Support

Our grouting technologies have been employed to mitigate sinkhole movement, reduce large subsurface groundwater intrusions and provide large scale site improvement in which loose soil strata did not make conventional ground support methods feasible.

High Mobility Grouting

This type of grouting involves the injection of cementitious or chemical based grouts into a soil/rock matrix to fill the pore voids or cracks, fissures in an effort to strengthen the material or increase permeability to mitigate groundwater seepage. Based on the materials used, there are two major types of high mobility grouting: cement grouting (portland cements or microfine cement grouts) and chemical grouting (sodium silicate, polyurethane, and acrylate grouts). The cement grouts are also called balanced, stabilized cement grouts because they are combined with different additives and admixtures (super-plasticizers, bentonite, fly ash, welan gum, silica fume, anti-washouts, etc.) that produce grouts with improved installation characteristics (such as zero bleed, resistance against pressure filtration, cohesion, gel and set times).

Balanced stable cementitious grouts are often used in dam foundations to create a grout curtain to reduce water migration beneath a new or existing dam from the upstream pool.

Compensation Grouting 

Compensation grouting is a technique that is used to mitigate potential settlement of structures caused by tunneling or excavation operations. It involves injecting precise amounts of
cementitious grouts into the soil zone located between subsurface construction activities and the foundations of surrounding structures to compensate for ground loss or to produce a controlled lift of the foundation.

Equipment

Bencor owns a large fleet of production-oriented equipment. Depending on jobsite conditions, we can utilize our larger multi-axis hydraulic drill rigs with up to 100-foot long drill masts capable of a 90-foot continuous feed stroke. These state-of-the-art machines allow us to reach the anticipated maximum drilling depths required for typical barrier wall projects in a safe and efficient manner. Or, we can rely on compact rigs specifically designed for low headroom or difficult access conditions. We also have sonic drill rigs that we frequently use on dam rehabilitation projects, along with the use of grout mixer plants, and high pressure grout and water pumps.

Drilling Methods

  • Diamond Core Drilling
  • Resonant Sonic Drilling
  • Dual Rotary Casing Advance
  • Rotary Airblast Drilling
  • Mud Rotary
  • Specialty Drilling
  • Exploratory Drilling

Real Time Monitoring

All of our grouting projects are completed in conjunction with Bencor’s powerful UGC software to monitor and record drilling and grouting operations all while being monitored using advanced Real Time Monitoring System. Our system fully integrates wireless and internet technologies to enable Project Inspectors and the engineering team to view and track all site activities