Quick dismantling method for short-pier connected arch bridge based on pier shear failure

The invention provides a pier shear failure-based short-pier connected arch bridge quick dismantling method, which belongs to the technical field of short-pier connected arch bridge dismantling, and comprises the following steps: collecting or actually measuring the structure and material parameters of a short-pier connected arch bridge to be dismantled, calculating the critical size area av * bv of pier shear failure through a critical equation, closing the traffic, and completing the dismantling of the short-pier connected arch bridge to be dismantled. The bridge piers are symmetrically and synchronously cut, the effective size of the section of concrete of the remaining core part of the bridge piers is smaller than the critical value, the arch feet of the first span are broken through blasting or mechanical breaking, shear failure of the bridge piers of all spans can happen, the whole bridge collapses, fallen fragments on the ground are manually cut, cleared and transported, and dismantling operation is co