Cape Creek Tunnel was built in 1932. It is approximately 714' long with alternating sections of exposed rock and concrete liner. Voids were discovered behind the liner in all three sections of the tunnel. Above the crown of the tunnel were voids large enough to stand in. Not only did the tunnel need to be relined, but the voids behind the original lining needed to be filled to prevent further deterioration and protect the concrete liners. Two inch injection holes were drilled through the liners to locate voids.
This project required adjustment to the consistency and strength of the grouts depending on the location and size of the void. The state of the art equipment used on this project was capable of adjustments to mix proportions on site as needed. Grouts were pumped over 2,000' from a staging area located on the side of the road at the closest turn-out. Environmental protection was important being so close to the ocean. Each night our residual material, in addition to our clean out water, was hauled off site as waste.
MixOnSite has performed this scope of work successfully on many unique projects nationwide.
Distribution Center Reno, Nevada
Slab Curl Problems Solved
This new distribution warehouse was plagued by severe deterioration and ride-ability problems caused by slab curl shortly after construction. This loss of sub grade support at construction and control joints caused differential slab movement as forklifts passed over the area.
Sub grade support was restored by pumping a cement and fly ash grout in under low pressure to fill the voids and stabilize the slab. Surface repairs included grinding the surface to improve ride-ability, partial depth removal/replacement of the distressed concrete, and installation of new joint sealant.
