Generally speaking, the quotation for cutting and dismantling beams is: 1. The cast-in-place technology is about 500-550 yuan per side, and the construction contents are about: manufacturing, assembly, erection, demolition, repair, maintenance, transportation, storage, stacking and coating with release agent (including the procurement of bamboo plywood and stay bars for bottom, outer, inner and side formwork). Procurement, unloading, laying, processing and transshipment of square timber from support to box girder bottom formwork; Manufacture of anchor pad and saw-tooth template, and manufacture, installation and removal of all small steel structures and wooden models; Manually cooperate with preloading; Concrete pouring, tamping, surface closing, curing, roughening, trimming, mending and sealing; Manufacture, installation and material transfer of various embedded parts and ironware (including materials of drainage pipes, exhaust holes and other pipelines); Installation and disassembly of upper and lower bridge steps and lighting frames, reserved manholes, roughening of tensioning notches, straightening and restoring reinforcement and sealing ends; Manual and mechanical water bag preloading (individual parts are hoisted and preloaded by themselves, etc.). ) and other related matters. 2. The prefabrication process is about 170 yuan, and the contents of the construction contract are probably: operation and maintenance of portal crane, trial assembly, assembly and dismantling of box girder formwork, formwork painting and painting, maintenance, fabrication and installation of embedded parts, concrete transportation, concrete feeding, pouring, vibration, decoration and maintenance, chiseling, pre-embedding of prestressed pipes, concrete sealing and so on.