Deep Soil Mixing at the Boca Beach House.
Lying directly at the Boca Inlet and edge of Lake Boca is the development of the luxury 4-story property. The Boca Beach house project was contracted to Malcolm Drilling for Ground Improvement services. Malcolm Drilling performed soil mixing services to allow for the excavation of the mat foundation below the water table in the dry and performed the ground improvement beneath the structure to increase the bearing for a mat foundation underneath. Loose sands and organic material beneath the project footprint required ground improvement to increase the bearing beneath a structural mat. Further complicating construction was the high groundwater table which typically would require a major dewatering effort to construct below grade. Malcolm performed large-diameter soil mixing which transformed the sand into a weak rock. This process not only increased the bearing capacity of the soil beneath the structure but temporarily functioned as a water cutoff to allow for excavation and concrete construction completion in the dry. The construction of the Shoring walls used a similar soil mixing process combined with wide flange beams. The Soil mixing process, performed with large diameter single point tooling to mass improve the sands beneath the mat and both improve bearing capacity and form a temporary water cutoff. Malcolm then created the shoring walls by soil mixing the native soil and then wet setting wide flange beams.