Earth Anchor Performance And Monitoring

Earth anchor performance and monitoring:

An extensive monitoring program is underway to measure the performance of the tiebacks earth anchor. Load cells have to the east and south of the site. The slope rises on an average of 50 ft (15 m) in elevation above the top of the pit, and is setback approximately 30ft (9 m) from the edge of the pit. The north and west sides of the site are fairly level and little increase was seen in tieback earth anchor loads in these areas except for the northwest corner of the pit. Contrary to earlier expectations of creep problems, there appeared to be none. Although there was some concern, it was decided to wait and continue to monitor the load cells. The unfavorable surcharge, combined with the relaxation and readjustment of the earth due to the excavation and overburden removal, were the prime suspects. It was the general consensus that as activities su bsided and equilibrium was reached, the load increases would stabilize and the tiebacks earth anchor would perform as designed.