Photo courtesy of USACE Instrument packages at 28 points along the 7.5-mile levee include spider magnetometers, which slide down a tube as the soil below the levee compresses. Clusters also include two inclinometers that bow out of plumb in response to horizontal soil movement and settlement plates buried in the new lifts to measure placement and consolidation in the new work zone. A benchmark, anchored in a stable sand layer, completes the package. + Image Infographic courtesy of USACE Inclinometers bow out of plumb in response to horizontal soil movement and settlement plates buried in the new lifts. Related Links:
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.