Model experiment of engineering protection on loess-mudstone interfacial landslide
LI Chi1，YANG Liu1，WULIJI Nashun1，YAO De2，WANG Xiaorong1
(1. Civil Engineering Institute，Inner Mongolia University of Technology，Hohhot，Inner Mongolia 010051，China；2. Chemical Engineering Institute，Inner Mongolia University of Technology，Hohhot，Inner Mongolia 010051，China)
Abstract：Loess-mudstone interfacial landslide is one of the most prominent landslide hazards occurred in soil-rock contacting zones. A semi-similar material physical model testing on anchor rod retaining wall was conducted to investigate the sliding mechanism of rainfall induced loess-mudstone interfacial landslides and the feasibility of engineering protection in this paper. The sliding mechanism of interface is analyzed through monitoring the pore water pressure，earth pressure and the displacement of slope surface markers along different sections of inner loess strata and interface between loess and mudstone. The variation of displacement and earth pressure behind anchor rod retaining wall were summarized. The results indicate that the average displacement of anchor rod retaining wall is 5.45 mm after the during two rainfall period，is far less than the specification requirements. This study explores the anchor rod retaining wall can effectively prevent the sliding of slope at the slope toe，restrain the development of cracks within the slope，slow down the development of interface displacement，and prevent the loess-mudstone interface landslide. It also provides the scientific guidance for the engineering prevention from geologic hazards of rainfall induced loess-mudstone interfacial landslide.
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2016, Vol. 35 
