Bencor provides a variety of specialized, geologic-specific drilling and grouting technologies. Bencor develops and engineers numerous grouting programs and procedures, which assist in determining the optimum level of grouting and customizing of designs for site-specific applications.
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.
- Pre-excavation Soil Treatment
- Grout Curtain
- Dam Foundation Grouting
- Soil Stabilization
- Sinkhole Mitigation
- Groundwater Intrusion Mitigation
- Seepage Barrier / Cutoff Wall
All 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.
High Mobility 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. Balanced stable cementitious grouts are used in dam foundations to create a grout curtain to reduce water migration beneath a new or existing dam from the upstream pool.
Low Mobility Grouting involves the injection of low slump grout which remains in a homogeneous mass and provides controlled displacement to fill void areas, compact loose soils, and lift or level foundation structures. Grout casing is installed through a predrilled hole to the desired depth of treatment. Low slump grout is then pumped under pressure as the casing is withdrawn. The pressures and quantity of grout pumped is dictated by the in-situ soil conditions and type of treatment needed.
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.
Drilling and Grouting 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.
Support of Excavation
Slurry / Diaphragm Walls
Advanced Jet Grouting Technologies
Specialized Grouting Technologies
San Francisco, CA
Third Street Light Rail Program
Bay Area Rapid Transit (BART) Authority