PRELINING REINFORCING CONSTRUCTION TECHNIQUE FOR NATURAL GROUND

摘要

PROBLEM TO BE SOLVED: To provide a natural ground reinforcing construction technique for a tunnel or an underground cavity wherein a partition wall highly workable and highly pressure resistant is formed in a natural ground area around a hole wall at a terminal and an middle in the axial direction to ensure filling effect of solidifying material for reinforcing the natural ground. ;SOLUTION: In a prelining reinforcing construction technique for a natural ground, a reinforcing pipe 11 having a discharge hole is driven in a natural ground ahead of a facing at the outer periphery or the border of the facing for tunnel drilling and solidifying material is filled via the reinforcing pipe 11 and the discharge hole for reinforcing the natural ground. The reinforcing pipe 11 in which the water-permeable solidifying material is filled and on which a packer 12 capable of filling the solidifying filling material from outside to inside is mounted close to, at least, the terminal as a filling port of the solidifying material, is driven and the water-permeable solidifying material is filled in the packer 12 to form the partition wall 30 in the natural ground are around the solidified solidifying material and the solidified packer 12, followed by filling of the solidifying material via the reinforcing pipe 11 and the discharge hole. Preferably, a plurality of packers 12 are mounted at a predetermine position in the reinforcing pipe 11 or the reinforcing pipe 11 is formed of a glass fiber reinforcing resin pipe.;COPYRIGHT: (C)2000,JPO