For more than 110 years, Subsurface Constructors has been a Midwest leader in deep foundation construction. Today, we're also recognized as one of the most experienced and reliable ground improvement contractors in the U.S. From offices in St. Louis and Boston, we bring innovative, value-added approaches to engineers and contractors nationwide - with the expertise and equipment to deliver any geotechnical project. Our team has the experience to design and build safe, reliable and low-cost earth retention walls for the biggest jobs.
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Subsurface Constructors was founded in 1906 and has been in continuous operation for more than 110 years. This longevity is due to a commitment to excellence and a dedication to taking the long view. By long view, we mean that we choose quality work and long-term relationships with great clients over short-term profits.
At Subsurface Constructors, we offer a combination of both ground improvement and deep foundation services. We bring value engineering to all phases of your geotechnical project, using innovative process improvements and emerging technologies to capture the greatest value. Our services are comprehensive, covering design/build and site investigation capabilities. We can deliver projects from concept to construction and to any scale, providing you total responsiveness, reliability and a pain-free experience.
Ground improvement is the use of mechanical means to improve weak or marginal soils and fills to support a structure. In order for a site to meet performance requirements, geotechnical engineers will consider ground improvement, deep foundations or the remove-and-replace method. But of these options, ground improvement is often the most economical and efficient way to support shallow foundations in marginal soils, assuming the soil conditions and structural loads are suited for it.When ground improvement is used on a project, it can provide the required bearing pressure for the optimal footing size, reduce settlement and address seismic concerns with liquefaction mitigation.
Aggregate piers are columns of compacted stone installed in groups in poor soil to increase bearing pressure and mitigate settlement under structural footings. They are a cost-effective method to reinforce soft, cohesive soil and poor fill for all types of structures. Aggregate piers are formed when lifts of stone are introduced to an open hole and compacted using high-energy densification equipment. The phrase aggregate piers may be used to describe either a rammed pier or a vibrated pier, also called a vibro stone column (VSC).
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