Drilling Services
C-4 Commercial Services LLC works with construction supervisors to schedule the appropriate size and number of rigs. We have all the necessary tooling, featuring our inventory of large and small diameter pipe for upper and down hole casing needs, as well as the expertise to efficiently complete your project.
DRY DRILL METHOD
The dry drill method consists of drilling the shaft excavation of per-determined size and depth, removing accumulated water and loose material from the excavation, placing the reinforcement cage, and concreting the shaft in a dry excavation at determined depth.
CASING METHOD
The casing method is applicable to sites where the soil conditions are such that caving or excessive soil or rock deformation can occur when a hole is drilled. This can happen when the boring is made in dry sandy soils or gravel which are stable when they are drilled but will slough soon afterwards. In such a case, the bore hole is drilled, and a steel pipe casing is quickly set to prevent sloughing. Casing is also required if drilling is required in clean sand below the water table underlain by a layer of impermeable stones into which the drilled shaft will penetrate. The casing is removed soon after the concrete is placed.
WET SHAFT OR SLURRY METHOD
The slurry method of construction involves the use of a prepared slurry to keep the bore hole stable for the entire depth of excavation. The soil conditions for which the slurry displacement method is applicable could be any of the conditions described for the casing method.
The slurry method is a viable option at any site where there is a caving soil, and it could be the only feasible option in a permeable, water bearing soil if it is impossible to set a casing into a stratum of soil or rock with low permeability.
BELLED PIERS
When the soil stratum does not have the adequate bearing capacity, belled piers are generally used. For the formation of a bell, the auger is replaced by an under-reaming tool which consists of a cylinder with cutting blades that are hinged at the top. The cutting blades are in the closed position when the under-reamer is lowered into the hole. On reaching the bottom of the hole, the blades are spread outward by a down pressure. As the under-reamer is rotated, a bell is formed and the loose soil falls inside the cylinder, which is raised and emptied. The process is repeated until the bell is completely formed.
SHEET PILES
These interlocking steel sections are driven in the ground with a vibratory or impact hammer and are used to support excavations or soil removal. They are common in both temporary and permanent applications. Because sheets make a continuous steel wall, they are useful in applications to stop water infiltration, loose soil infiltration, and migration of soils.
The slurry method is a viable option at any site where there is a caving soil, and it could be the only feasible option in a permeable, water bearing soil if it is impossible to set a casing into a stratum of soil or rock with low permeability.
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Contact C-4 Commercial Services LLC to inquire about our services, and employment opportunities, or receive a custom quote.
