Historic Structure Foundation Stabilization – Cody, WY

The Irma Hotel is a beloved historic land-mark in Cody Wyoming. Built in 1902 by William F. Cody, a.k.a. Buffalo Bill Cody. The “Irma”, named for Buffalo Bill’s youngest daughter is on the National Register of Historic Places.

Settlement had occurred on one corner of the structure due to a downspout terminating too closely to the rock foundation. The settlement had caused cracking of the exterior stone masonry and interior finishings of one of the hotel’s guest rooms. It was important to the owner to stabilize the foundation to prevent additional damage without disrupting patrons or having to close the business for a lengthy period of time. It was also important to the owner to repair the foundation without causing additional damage to the original stone foundation and masonry.

Owner Scott Darby contacted CST to evaluate the foundation settlement and provide a solution to repair the problem.

CST first performed a thorough site evaluation and survey of the hotel’s foundation and settlement.

An injection plan was designed. Injection depths and locations were determined and survey benchmarks placed.

The crew then placed probes into the foundation soils and installed high density structural polymer at the predetermined depths.
CST’s low pressure injection process is an ideal solution for historic structures. The polymer expands, filling voided areas and restores bearing capacity of the soil to support the structure and mitigate against future settlement.

CST completed all injections along the foundation in one working shift without need to close the business during repair.  Foundation soils were efficiently and effectively stabilized, protecting the historic structure against future settlement and damage.  The technology is performed without excavation and provides a fast, clean, and long lasting solution.

CST’s foundation stabilization and lifting technology is well suited for historic structures where high pressure grout or alternate methods may cause damage or alteration of the original structure.

CST’s foundation repair and soil stabilization technology helps preserve and protect the original integrity of historic structures.

Riverton Utah Commercial Void Fill and Soil Stabilization

In early February of 2018, a major water line break caused significant voiding be- neath the floor slab of a large commercial retail warehouse in Riverton UT. The pressure of the water was so great, in addition to causing large voids beneath the floor, it actually cracked the slab, and push water through the control joints in the concrete, flooding portions of the store. Scott Davis with Kleinfelder Engineering contacted CST concerning the damage, looking for an in situ solution to fill the voids. Soil testing performed after the water line break revealed that the soil compaction beneath the floor was good, but the voided areas would need to be filled. The solution would need to be performed without having to move permanently installed shelving units and merchandise and be completed without a lengthy closure for the business.

CST partnered with Tradesmithe Property Management and Kleinfelder Engineering to design an in situ repair plan to fill the voids and provide continuous , uniform subgrade support. The solution needed to provide a minimum of 6,000 PSF compressive strength of the soil and maintain dimensional stability for the life of the structure. CST’s in situ soil stabilization technologies employs a high density, expansive structural polymer injected through small holes directly through the floor slab and into the subgrade soils. The polymer, in it’s liquid state travels along finding voided areas and expands to fill and re-compact the compromised soil. Injection holes are very small and are filled with grout once repairs are complete. Once cured, the polymer reaches a much higher compressive strength that easily exceeded what was required for this project.

Once all voided areas were identified and marked, CST installed ESP material and completed void fill on a total area of 26,000 SQ FT.  All repair work was completed in 3 nights, allowing the business to stay open during the day.

Due to the highly advanced injection techniques and equipment, permanent shelving units and merchandise did not have to be moved in order to make the repairs.

The repair process efficiently and effectively restored compaction to the sub- grade soils and provided a solid solution to extend and preserve the useful life of the floor slab and structure.

CST’s polymer injection process does not require excavation and is environmentally friendly while providing fast, clean, permanent results.

  • Locate all voided areas and complete repairs without moving permanently installed shelving features and
    merchandise.
  • Permanently installed shelving, fix- tures, and appliances could not be moved during the repair.
  • No excavation required.
  • Environmentally friendly.
  • Little to no disruption to business.
  • Extends the useful life of existing slabs and structures.

Colorado Bridge Approach Slab Settlement Lift

Bridge Approach Slab Settlement Repair – Crystal Valley Parkway, CO

Asphalt Pavement Lift of a Bridge Departure where the Subgrade had settled and the pavement needed to be lifted

In Castle Rock, CO, along the Crystal Valley Parkway, the Town of Castle Rock, CO was experiencing bridge approach slab settlement of 1,900 SF of bridge approach, departure, and sleeper slabs on two bridge ends and adjoining pavement. Settlement of adjacent sidewalk had also occurred causing an unsafe driving situation as well as dangerous conditions to pedestrians utilizing the crossover sidewalk area. The unstable subgrade reaching below the sleeper slab would need to be treated to stabilize the area before mill and fill of asphalt pavement could be performed.

Bridge Approach Slab Settlement Solution

CST partnered with the Town of Castle Rock, utilizing their Deep Injection process to treat unstable soil, lift the slabs, and realign sidewalk and pavement areas. Dynamic Cone Penetrometer soil tests were performed to correctly identify the weak soil zones. Injection tubes were placed at depth and expanding structural polymer injected to densify and provide stabilization of subgrade soils. Once the soil is stabilized, injections are continued to provide lift and realignment of the slabs and overlying pavement. The CST Deep Injection process provides proper support to the soil and heavy sleeper slabs to mitigate against future bridge approach slab settlement and movement, while also providing a solid subgrade for pavement.

Repairs were made in two shifts while allowing traffic to continue utilizing the area vs. time and money spent to reroute. Foundation soils were significantly strengthened to mitigate against future settlement. Bridge approach and departure slabs were lifted back to original elevation as well as stabilization and lift of sidewalk areas. Subgrade soils were quickly and effectively stabilized to provide a strong base for asphalt pavement mill and fill operations. The added benefit of water cutoff effectively arrests soil erosion within the area. Significant savings to municipalities and tax payers vs. alternative methods of rip out and replace. Extended use life of the bridge, sidewalk, and pavement.

Teton Building Column Reinforcement – Cheyenne, WY

Concrete Stabilization Technologies, Inc.’s crews began work on the column repair & rehabilitation project at the Teton Building in Cheyenne, Wyoming Monday, June 25th, 2012. The project began by placing shoring and re-moving and cleaning up the deteriorated columns. The following day, the concrete floor was removed from the area. A short break in the work was taken to allow tenants to continue working without disruption. During the lunch break, the concrete around the columns was broken up and removed. The column depth below the top of the concrete floor was approximately seven inches (to the top of the foundation pad). The foundation pad is approximately 5 feet by 5 feet and foundation pad thickness is 2 plus feet.

Crews arrived on the job site at 7:00 a.m. the following day and returned all of the rental equipment. A call was made to order concrete to arrive at 1:00 p.m. At 8:00 a.m., we started applying the primer with a paint brush to the north column. At 8:21, we started applying the Tac-coat with a plastic 8” putty knife. At 8:40 a.m. we started wrapping the carbon fiber (33” H x 8’ L) to the Tac-coat and then applying the saturation coat with a small paint roller on top of the carbon fiber material. Once the satu-ration coat was applied, we broadcast small rock to the epoxy to give the stucco a surface to bond with. We finished the north column at 9:05 a.m. and then moved to the south column. At 9:15 a.m., we applied the primer and at 9:30 a.m., applied the Tac-Coat. At 9:55, the carbon fiber (4’H x 8’L) and the saturation coat, then small rock. The south column was completed at 10:17 a.m.

At this point, we set 1/2” rebar dowels in the slab surrounding the columns and then cleaned up the broken out concrete around the columns and hauled off to Simon Contractors for recy-cling. At 1:00 p.m. the 6 sac, 4,000 psi concrete arrived and we poured and finished the concrete around the columns. We built a curb by the block wall by the north column. At 2:30 p.m., we took down the shoring posts and loaded the truck for demobilization.

Campbell County Detention Center – Gillette, WY

Concrete Stabilization Technologies, Inc., partnered with Campbell County Public Works Department and CEI Engineering, to repair the foundation of the Campbell County Detention Center in Gillette Wyoming during the summer of 2001.

Column Stabilization, Interior Wall Lifting, Floor & Thickened Slab Lifting, Void Fill, and Soil Densification were preformed in the facility to correct a number of settlement issues. Crews began on the outside columns of the building, lifting and stabilizing exterior columns. Using the CST DI process, the soil was stabilized around the columns, voids filled, and columns were placed back on original center. Post testing of the soils in the area proved significant increase in the soil densification, arresting any further settlement issues from occurring. Crews continued work inside the facility, with injections placed to lift and stabilize the floor slabs and lift walls back to grade.

Work performed at the Campbell County Detention Center was done during normal hours of operations, with very minimal disruption to staff or residents of the facility. Security of the residents was not compromised due to the non-intrusive methods and procedures employed by the CST technology. Work was performed in situ, and by utilizing the CST technologies, Campbell County not only saved money by avoiding a rip out and replace scenario, but also avoided the hassle of having to relocate residents and staff. The project was completed on time and below the original estimate. Repairs made to the Campbell County Detention Center over a decade ago, are still holding strong!

Home Foundation Lift – Pine Haven, WY

Concrete Stabilization Technologies, Inc., partnered with Homeowner, Jim Noecker, and Engineer, Ed Scott, P.E. of CEI Engineering to provide a solution for Jim Noecker’s residence in Pine Haven Wyoming. Since construction of the Noecker residence, the home had experienced cracking & separation of the walls, doors sticking, and deformation of the roof. The problems were thought to be caused at least partially by heave or swelling shale in the subdivision where the residence was built.
Dennis Russell with STRATA Geotechnical Engineering performed soil tests. Dennis determined that swelling soils were not a problem, and a plan was developed for repairs using CST’s technologies.

The original estimate for this project was $59,850 plus $8,000 if resistance piers were needed to get the lift of the residence. A second CST truck was used for the final lift of the home. As a result, assistance of resistance piers was not necessary to return the home and floors to grade. The home was lifted approximately three inches on the side with most settlement. Final elevations of the foundation and floors were within 1/2 inch tolerance and soils were stabilized.

The foundation still has the original design and by using the CST technologies, we do not have to worry about having half of the foundation on piers and half on spread footers. This is an important feature of using the CST technologies to prevent future problems in having mixed foundation combining deep foundations (piers) with shallow foundations (footings) on structures.

Final construction cost for repairing and stabilizing was below the original estimate and came in under budget at a total of $55,743.00.

The Homeowner, Jim Noecker, contacted CST in May of 2012 with an update of their residence, stating that they are very impressed! Jim stated that there was “not one new crack or sign of any further move-ment. You guys did a great job and the house seems very stable now. No doors out of square, roof looks normal, and the deck is now level. Glad to see it made it at least one year with the fix and hopefully many more to come. Thanks again for your expertise!” – Jim Noecker