Coble Trench Safety was called in to help repair a leak in a waterline. The owner needed to repair the leak, which was located beneath a building slab, to prevent water loss and damage from the leak. The soil had been classified as C-60.

The project would occur inside an existing building and the contractor would have to cut the slab to perform the excavation and repair. These two factors limited the protective system options, as well as introducing the need to limit the size of the excavation. The most difficult challenge with this job would be working around the overhead obstacles.

After learning that the contractor needed to hand dig the excavation and would need to install the shoring by hand without the presence of machinery, the shoring options were quickly reduced. Hydraulic vertical shores with sheeting proved to be the optimal shoring system for this project.

Hydraulic vertical shores can be easily installed and removed by hand, as well as being somewhat flexible with the excavation size to limit the amount to be excavated. The excavation would eventually form a five foot square, which was easily accommodated with the vertical shores and sheeting.

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