METHOD FOR CONSTRUCTING INCLINED PILE GROUP PERMITTING DEFORMATION OF PILE BODY UTILIZING LARGE-DIAMETER CORE MATERIAL HAVING HEAD WITH BEARING SLAB STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a method for constructing an inclined pile group, which enhances the stability of the whole slope causing loosing, by manifesting the effect of bending reinforcement utilizing a large-diameter core material, the effect of tensile reinforcement brought about by possessing a head bearing slab structure, and the effect of integrating the ground and the core material together by converting sliding surface displacement into deformation behavior in a moving layer without loading prestress.

SOLUTION: In this method for constructing the inclined pile group permitting the deformation of a pile body utilizing the large-diameter core material having a head with the bearing slab structure, the cross section of the core material for ordinary use is enlarged with a micropile size; a head structure includes a bearing slab; a driving angle is determined within the range of 0-45° from a line perpendicular to a sliding surface; a method for evaluating the manifestation ratio of an axial force and a bending shear resistance force from a stress-distortion relationship and a yield criterion of a reinforcing material is established; the prestress is not loaded so that the core material is deflected along with landslide activity; and the displacement behavior on the sliding surface is converted into the deformation behavior in the moving layer, caused by the deflection of the core material, so that the consideration of the effect for integrating the ground and the core material together can be given to a design.

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