Quick dismantling method for multi-span continuous double arch bridge causing connected arch effect

Abstract

The invention discloses a quick dismantling method for a multi-span continuous double arch bridge causing a connected arch effect. The quick dismantling method comprises the following steps of: (1) coffering a river channel and ensuring that fragments and residues during bridge dismantling can be cleaned in time; (2) pumping water and dredging to leave a construction site; (3) closing a navigable river and ensuring the safety of navigable vessels; (4) dismantling the railing and bridge surface concrete and reducing objects falling on the bridge surface; (5) sequentially chiseling off the arch ribs from the middle of an arch springing toward two sides; (6) enabling the bridge to continuously collapse by using the connected arch effect; and (7) treating wastes. According to the quick dismantling method disclosed by the invention, the construction period can be effectively shortened and the construction safety is improved; and the phenomenon that the river channel is blocked in the dismantling process is avoided by dredging a cofferdam, so that the construction cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of bridge demolition, in particular to a construction method for dismantling a multi-span continuous double-curved arch bridge by using a machine chisel to trigger a double-arch effect. Background technique [0002] Since the 1960s, double-curved arch bridges have been widely adopted all over the country. However, after decades of use, except for a small number of double-curved arch bridges that can meet the current traffic requirements through reinforcement, most of them have become dangerous bridges due to low load levels and overdue service, with cracks and concrete weathering in varying degrees. , no maintenance value, must be demolished and rebuilt in road reconstruction. Due to various reasons such as lack of necessary precautionary measures, serious violation of construction procedures and construction plans, blind construction, inadequate technical safety management of the construction unit, and low quality o...

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Problems solved by technology

[0004] In order to overcome the deficiencies of the existing double-curved arch bridge demolition method, such as slow speed, long break-off time, and potential safety hazards, the purpose of the present invention is to provide a safe and reliable double-curved arch bridge with fast bridge demolition speed, short break-off time Removal method

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