| 摘要 |
A METHOD OF CONSTRUCTING GROUND COLUMNS FOR GROUND IMPROVEMENT CHARACTERISED BY: INSERTING A HOLLOW TUBE (7) INTO A GROUND, TH ETUBE HAVING A LEADING END (8) WHICH IS CLOSED DURING INSERTION SO AS TO FORM A HOLE IN THE GROUND; FILLING THE TUBE WITH FILL MATERIAL (S); WITHDRAWING THE TUBE (7) FROM THE GROUND, THE LEADING END BEING OPEN DURING WITHDRAWAL SUCH THAT FILL MATERIAL IN THE TUBE FILLS THE HOLE AS THE TUBE IS WITHDRAWN THEREBY CREATING A GROUND COLUMN. THERE IS ALSO PROVIDE AN APPARATUS FOR CONSTRUCTING GROUND COLUMNS FOR GROUND IMPROVEMENT.(FIG.1)
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