Robinson Middle School Slab Stabilization and Lift – Topeka, KS
The Problem
The following field observations were made by Terracon Engineer on June 7, 2023 at Robinson Middle School located in Topeka, Kansas. Core locations were established in the field at general locations. They cored through the existing floor to evaluate the subsurface to assess the presence of any voids. In addition, they sampled the subgrade soils at the selected core locations using a mechanically driven Shelby tube sampler. A void was encountered immediately below the concrete slab at all three core locations. The voids ranged in thickness from ¾” to 2 ⅜”. These voids had also been a factor in the slabs sinking in the affected areas. The approximate area of stabilization and lift was 2,800 sq. ft. The school district needed a team that would complete the work with minimal disruptions and closures to the facility. This is a huge factor in remediation and repair work on commercial structures like schools, business warehouses, parking garages, apartment complexes, and other concrete slab facilities that cannot afford to close down for a long period of time.
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The Solution
The Topeka School District had reached out to several companies to evaluate and solve these existing problems. Our team at Olympic Concrete Lifting were chosen to come in with the right solutions in addressing all concerns. The Olympic Concrete Lifting crew used approximately 2,500 pounds of Geotechnical Polyurethane Foam System by US company, Polypier. This product helped in the stabilization of the lower-level slab on grade by filling all the voids below the slab. The void depth ranged from ¾” to 2 ⅜” based on borings provided in the Terrecon report. The slab was lifted as close as possible to the original elevation without loading or damaging existing interior partitions. Portions of an existing stage floor were removed to gain access to some of the concrete slab. Olympic Concrete Lifting was non -invasive using small drill holes and the material being used left the school district with no downtime based on our rapid set time.
The Results
The Topeka School District needed a team that would have the job completed between May 26, 2026 and July 12, 2026. Our team at Olympic Concrete Lifting knew there was only one week between the time school ended for Summer Vacation and the start of Summer School. It was our priority to ensure that there was to be no downtime for the staff and students who would be arriving back for school activities on June 1, 2026. Olympic Concrete Lifting had the job completed in four business days May 26- May 29, 2026. The staff and administration were very pleased with the timing and the results.