Surface stabilization for the lifting works with crawler crane by using Lattice Frame Reinforced geosynthetics covered with aggregates

摘要

The authors have newly developed a geosynthetic system for surface soil stabilization, called “the Lattice-Frame-Reinforced (LFR) sheet”. The LFR sheet combines a geotextile and a lattice frame which is composed of “geojacket” formed by filling mortar into fabric hose called “jacket”. This geosynthetic system was applied to a surface soil stabilization for lifting works with 90t crawler crane which were accompanied with the bridge pier reinforcement project. In this paper, the design procedure of this geosynthetic system and the application result, are described firstly. Secondary, the results of the back analyses which were conducted since the first prediction result showed large difference with in-situ measurement data, are mentioned. Finally, design chart of this geosynthetic system, composed by conducting 3-D deformation analyses with using the procedure which was proved by back analyses, are also described.