Monitor of Deep Drain Stability in High Steep Slope

Through the geological prospecting and the hydrological conditions survey in the real engineering, combined with the results of drainage pipes with finite element analysis, the specific buried project of deep drainage pipes is identified. The slope surface deformation is monitored by using total station and GPS, the slope internal displacement is monitored by using inclinometer. Monitoring results for many times in 18 months are analyzed. The largest surface deformation is 41.4 mm, and the largest internal deformation is only 10 mm, all are less than the first order of allowing deformation 123.75 mm of 0.0025h (h is the height of slope). Slope stability is got, and it is further validated the slope has a good stability after the deep drainage treating.