Treatment Technology Of Landslide For High Fill Embankment With Anti-Slide Pile

Stability analysis for Lingchuan highway landslide was done by qualitative and quantitative methods. Lingchuan highway landslide is unstable. Lingchuan highway landslide will be a large-scale landslide, and belong to accumulated soil landslide which hillside and groove accumulations slide on the bedrock top surface. In order to deal with the slide,the combined strutted structure which is made of anti-slide pile with prestressed cable and normal anti-slide piles were put forward and used. Prestressed anchor cable frame and techniques of planting grass were proposed to protect subgrade slope of the landslide section.Through theoretical calculations,the influence law for length of anti-slide pile and prestress value on pile moment, shear were analysed, which offered theoretical basis for determining the pile length, prestress value and reinforcement. The reasonable construction machinery association, pore-forming construction process, pile concrete pouring scheme, anchor cable construction technology and backfill construction technology were studied, then the waterproof and drainage measures for slope both in construction period and operation period were put forward. Through field test, it was found that landslide was active during the rainy season,the sliding scale was influenced by external conditions, rainwater was the main factor which induced landslide. On condition that excavation depth of construction platform is bigger, the upper landslide does not slide during the rainy season, and the force of anti-slide pile is natural, which indicates that the stability of upper landslide is not influenced by excavating construction platform. So the construction scheme is reasonable, and the strutted structure play important role. Comparing the measured results with the theoretical results during the construction period, it is found that the measured results of internal force for anti-slide pile and that of theoretical results is basically consistent. The internal force for anti-slide pile is in the design scope, which shows the treatment scheme is reasonable and feasible.