Quick dismantling method for variable-cross-section high-pier masonry connecting arch bridge

The invention discloses a quick dismantling method for a variable-cross-section high-pier masonry connecting arch bridge. The quick dismantling method comprises the following steps that firstly, structural parameters of the masonry connecting arch bridge to be broken and dismantled are collected or actually measured; 2, calculating the vertical height hd from the most economical cutting surface of the bridge pier to an arch foot; 3, calculating the critical section resistance moment W of the core part of the bridge pier which is subjected to bending damage at the position of the most economical cutting surface of the bridge pier; step 4, symmetrically and synchronously cutting the section of the pier along the longitudinal bridge direction and/or the transverse bridge direction, so that the effective section resistance moment of the core part of the pier is less than W; fifthly, the first-span arch springing is forcibly dismantled to collapse, and continuous collapse is achieved; and sixthly, the masonry mate