Drilled Micropiles – Craven Regional
Medical Center

New Bern, North Carolina

Morrison Engineers designed and installed 32 permanent, limited access micropiles to support a 4 story shear tower at the Craven Regional Medical Center in New Bern, N.C.

The existing single story building wing was expanded vertically three stories to accommodate the growing hospital needs in the local area and required lateral restraint due to the increased building height. This was achieved without increasing the footprint of the existing building by locating the foundation within the confines of a single 20’ x 20’ hospital room.

A portion of the existing structure was removed to allow for installation of the micropiles and construction of the shear tower creating the limited access workspace. Complicating the installation of the piles was that the location of the proposed shear tower was in an interior courtyard within the hospital campus. This necessitated the use of a 220 ton crawler crane to “fly” all equipment and supplies over the adjacent three story hospital wing.

Prior to installing the production piles, two full scale, 320 kip, load tests were performed to confirm the parameters of design. The 80 ton production piles were installed into the limestone bearing layer below the hospital and were completed on the General Contractor’s tight construction schedule.

Craven Regional Medical Center 1

Craven Regional Medical Center 2