A method of dismantling the lower support structure of a bridge

Abstract

The invention discloses a method for dismantling the lower support structure of a bridge, wherein the lower support structure includes bridge piers, caps and pile foundations, and the lower end of the pile foundations is set in water. The main steps are as follows: Step 1. Determine the horizontal and vertical directions of the bridge piers Cutting position; Step 2, cutting the pier in blocks; Step 3, dividing the cap; Step 4, determining the elevation of the cutting line of the pile foundation; Step 5, cutting the pile foundation by cutting machine, standpipe and fixing hoop; Step 6, lifting the pile foundation and the part caps connected on the pile foundation away from the water surface. The invention facilitates hoisting by vertically dividing the pier into equal parts and vertically cutting the horizontal plane; the pile foundation is cut underwater, and the vertical pipes fixed by the upper and lower fixing hoops are used to thread the wire saw during the cutting process, ensuring The accuracy of the wire saw cutting is ensured, and the trial cutting is performed before cutting, which further ensures the safety of the construction.

Description

technical field [0001] The invention relates to the field of bridge dismantling construction, in particular to a method for dismantling a supporting structure at the lower part of a bridge. Background technique [0002] With the continuous extension of bridge construction, some bridges that cannot meet the upper load and regional planning will be demolished, and some old and dangerous bridges will also be demolished and replaced for safety reasons. In the demolition of the bridge, there are few construction methods for the lower support structure of the bridge. When the lower support structure involves bridge piers, caps and pile foundations, the determination of the demolition plan of the three is an important link related to the bridge demolition construction, especially when the lower support structure When in water, the implementation of the demolition scheme is more difficult, so it is necessary to provide a comprehensive demolition method for the lower support structur...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for dismantling the lower support structure of a bridge, which is used to solve technical problems such as the determination of the cutting scheme, the implementation of the hoisting scheme, and the underwater cutting construction of the lower support structure of the bridge.

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