Foundation Services

Mays Construction Specialties, Inc. utilizes many different techniques and systems such as micro piles, foundation underpinning, helical piers, compaction grouting and conventional underpinning with concrete footings to raise and provide stabilization of many different types of structures.

Foundation Underpinning

 Foundation Underpinning

 

Foundation Underpinning is a process of modifying the foundation system of a structure that is unable to carry existing loads or additional loads within the existing soil conditions. Methods of underpinning include the construction of new or larger footings, driven piles, drilled piers, and hydraulic driven piers. Pier systems are typically drilled or driven deep into the soil and supported into load-bearing strata.

MCSI utilizes many different techniques and systems such as micro piles, resistance piers, helical piers, compaction grouting and conventional underpinning with concrete footings to raise and provide stabilization of many different types of structures. From underpinning multi-story buildings and bridges to small commercial buildings and residential structures, MCSI has the experience and proven record to handle a wide range of foundation mitigation and underpinning.

Helical Piers

Helical Piers/Piles provide deep foundation stabilization for both new and existing construction. Helical piers are installed through problem soils until load-bearing soils are reached for new construction. They can serve as an underpinning method to stabilize foundations in poorly compacted fill soils. MCSI has installed helical piers for interior and exterior application, and has the equipment for confined areas.

Helical pier system provide for a two-stage system of initially driving the manufactured pier or pile to a designed torque (load) using hydraulics, and grout can be added to increase capacities or provide shallower piles by gaining skin friction. Also installed laterally as tie-backs or anchor, and used for shoring in new construction, stabilizing slopes, and to stabilize and restore walls that have been improperly constructed or damaged by poor drainage or expansive soils.

Micropiles

Micropiles are a small diameter (less than 300mm) replacement, drilled pile, composed of placed or injected grout, and some form of steel reinforcement to resist a high proportion (or all) of the design load. Typically, high capacity steel elements installed with high grout/ground bond values transfer the loads by friction, and do not rely upon end-bearing loads.

Micropiles work well in areas that require deep foundation alternatives or in difficult ground conditions (cobbles, boulders and obstructions) where installation of conventional piles or drilled shafts would be overly difficult or expensive.

Mays Construction Specialties, Inc. has installed micro piles for new construction and also for foundation underpinning. With specialized drilling equipment and methods, MCSI can drill through virtually every ground condition, natural or artificial, and install micro piles with limited access and minimal vibration or disturbance.

Benefits / Advantages:

  • Close proximity to existing structures
  • Design and guidelines available
  • Earth retention
  • Environmentally friendly
  • Hazardous or contaminated soil installations
  • High loads and tensions (tested to over 1,000kips axial)
  • Installed in limited access or low head room
  • Installed single or in groups
  • Minimal disturbance and spoils
  • No or low vibration
  • Seismic retrofitting
  • Slope stabilization
  • Time saving
  • Transfer loads to deeper strata
  • Used in high water areas
  • Well suited for difficult ground conditions
  • Withstand axial and/or lateral loads

Concrete Repair, Restoration & Stabilization Specialists

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