| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for setting a proper water addition quantity and an extra quantity of a solidification material in idle driving time, without generating shear force in a connection joint, when driving a succeeding improvement pile by idly driving.SOLUTION: In a construction method of a connection joint for constructing a continuous improvement pile by moving a deep layer mixing processing machine so as to have an overlap part in the advancing direction, a preceding improvement pile 17a is constructed by using an agitation shaft having a plurality of shafts in the orthogonal direction to the advancing direction, and before solidifying the just- before preceding improvement pile, a solidification material is diffused by idly driving so as to have the overlap part 18, and a succeeding improvement pile 17b is constructed in an idle driving trace, and when idly driving, a solidification agent of the overlap part is diffused by discharging water, and when constructing the succeeding improvement pile of the idle driving trace, driving is executed by increasing the solidification material by an extra quantity.SELECTED DRAWING: Figure 1 |
