Underpinning in South Carolina

Using micropile underpinning in conjunction with soil nail shoring, we can support existing structures adjacent to deep excavations while maintaining the integrity of the buildings.

Application

  • Temporary and Permanent Building Underpinning
  • Allows for basement construction adjacent to an existing building

Installation

  • Support building by underpinning existing footings with micropiles
  • Install a shoring system, typically soil nailing, to retain soil
sketch of a footing underpinning with micropiles to aid a shoring sytems
Micropile Underpinning of a Footing with a Shoring System
micropile underpinning and soil nail shoring
This is a cross section view of how pit underpinning is achieved in four steps.

Pit Underpinning

By Jeffrey W. Coonse, PE | June 30, 2026
Pit Underpinning Pit underpinning is an old school way to achieve great results when you ...
READ FULL ARTICLE →
photo of a small drill rig installing micropoiles

Micropile Advantages

By Jeffrey W. Coonse, PE | February 21, 2021
What are the advantages of micropiles? Overcoming Difficult Ground Conditions The first advantage of micropiles ...
READ FULL ARTICLE →

Our Shoring Construction Services

Testimonials

Greg Shenkler, Skanska USA Building

Subsurface did a great job upfront making sure that we were installing the most effective solutions for our project. And despite a challenging schedule and unexpected underground conditions, the job was still completed ahead of schedule.