EQUIPMENT FOR COUNTERMEASURE AGAINST LIQUEFACTION OF GROUND IMMEDIATELY BELOW UNDERGROUND STRUCTURE, AND EQUIPMENT AND CONSTRUCTION METHOD FOR COUNTERMEASURE AGAINST LIQUEFACTION OF GROUND IMMEDIATELY BELOW FILL

摘要

PROBLEM TO BE SOLVED: To provide equipment for countermeasures against the liquefaction of not only ground immediately below an underground structure but also ground immediately below fill, which can prevent the settlement and lift of the underground structure and the collapse of the fill due to the liquefaction of the ground by effectively suppressing the flow-around of soil, caused by the liquefaction of the ground, by virtue of an excess-pore-water-pressure dissipating effect and a ground reinforcing effect, and which can sufficiently ensure the stability of the ground for countermeasures against giant earthquakes.;SOLUTION: A drain pipe with a drainage part is driven into the ground at each predetermined interval along the following longitudinal direction from a ground surface side 17 near the longitudinal side surface of the ground structure 14, or from a section of a toe 39 of slope in the longitudinal direction of the fill 34. The drain pipe is constituted by pairing a vertically-driven vertical drain pipe 11 and an inclined drain pipe 12 which is driven in the direction of inclination, making a certain angle with the vertical direction.;COPYRIGHT: (C)2007,JPO&INPIT