CONSTRUCTION METHOD OF UNDERGROUND STRUCTURE
Document Type and Number:
Japanese Patent JP3967473
PROBLEM TO BE SOLVED: To provide a construction method of an underground structure capable of controlling the gush of ground water while maintaining the inside of an excavation working chamber in the same atmospheric pressure as that on the ground and controlling the inclination of a caisson cutting edge reaching a foundation rock even in the case the foundation rock is inclined.
SOLUTION: The ground scheduled for a caisson 10 to pass through is precedently excavated, the plane circumference is larger than that of the caisson, the plane circumference is smaller than that of the caisson, and an impervious wall 13 having the lower end reaching the inside of an impermeable layer 21 is provided. Then, a caisson cutting edge 11 is set on the impervious wall 13, ground water is discharged while excavating the internal circumference of the impervious wall downward of the caisson cutting edge and ground 20a, and the caisson is settled while maintaining a state to cover the internal circumferential surface of the caisson with the impervious wall.
June 08, 2007
September 10, 1998
HAZAMA GUMI LTD
E02D19/12; E02D23/08; E02D19/00; E02D23/00; (IPC1-7): E02D23/08; E02D19/12