Stiver Engineering provided a shoring design for the launch and receiving tunnel shafts, including portal design implementing soldier piles and the shaft design implementing sheet piling and wale sets. Calculations and a finite element analysis (FEA) were performed for a 108-inch diameter tunnel steel casing pipe. Calculations for grout pressure used to fill voids outside the casing pipe were also provided.
Stiver Engineering designed a 204 ft. x 66 ft. x 24 ft deep multi-phase shoring system using piles, wales, and knee bracing. Implemented access ramps and phases, this shoring design allowed the contractor to complete the project despite the excavation being adjacent to large storage tanks.
Stiver Engineering provided a corrosion resistant vinyl sheet pile and treated timber bulkhead design for a property on Galveston Bay in Seabrook, Texas. The bulkhead consisted of vinyl sheet piles, timber wales, galvanized tie rods and timber deadman piles.
As part of a micro-tunnel project in Charlotte, North Carolina, Stiver Engineering created plans for seven tunnel boring machine runs along with launch and receiving shaft design. The plans included designs for a trench box bore pit, pile and lagging shafts at various depths and soil conditions, and a liner plate circular shaft with multiple ring beam portals. We also provided casing calculations, monitoring plans, settlement calculations, thrust load calculations and thrust blocks, as well as plan and profile drawings for a set of parallel sanitary sewer and storm sewer tunnels.
Stiver Engineering provided shoring design services for the construction of three new railroad overpasses on Hempstead Road in Houston. Due to the proximity between the proposed and existing overpasses, a shoring system had to be implemented that was only 12 feet away from the railroad. The shoring design, which followed AREMA and UPRR guidelines, consisted of sheet pile with wale sets, tie backs and grouted anchors. Construction of the overpasses was performed in multiple phases, and Stiver Engineering successfully carried out designs that were tailored for the needs of each phase. The project was completed in September 2019.