| 摘要 |
PROBLEM TO BE SOLVED: To adjust perpendicular displacement of an existing structure as intended in underpinning.SOLUTION: In a system 1 for jack control, an arithmetic processing section 13 uses perpendicular displacement, caused at each support point of a box body 2 when the stroke quantity of a hydraulic jack 7 is varied, so as to calculate, as [F], the degree of influence associated with perpendicular displacement from the support point where the stroke quantity is varied to another support point, sets, as adjustment displacement (δ), a quantity to be canceled by the hydraulic jack 7 in the perpendicular displacement (v) at the support point, and multiplies it by [F]so as to calculate a necessary stroke quantity of the hydraulic jack 7, so that the hydraulic jack 7 is brought under drive control according to the necessary stroke quantity. |
