Jack operation amount calculated in the under-pinning system and method as well as the jack control system and method

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]^-1 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.;COPYRIGHT: (C)2014,JPO&INPIT