Installation method of steel cofferdam for reinforcing bridge underwater structure

Abstract

The invention discloses an installation method of a steel cofferdam for reinforcing a bridge underwater structure. The method is characterized in that by cleaning a stand column, arranging an anti-skid washer, installing a hoop, assembling a counterforce frame, fixing counterforce chain blocks, lowering the steel cofferdam, arranging cross beams and longitudinal beams, installing jacks and performing symmetrical pressing, rapid pressing installation of the steel cofferdam for reinforcing the bridge underwater structure is completed; the hoop and the counterforce frame are assembled into a whole through buckles, the counterforce chain blocks are connected with the stand column to form an inverted-triangle counterforce system, and the positions of the jacks are determined according to the specification of the steel cofferdam. The method has the advantages that construction is fast and convenient, steel cofferdams with different diameters can be pressed in place in one step, the operationis simple and easy to control, the self-counterforce system and hoisting equipment are integrated, large hoisting equipment is not needed, installation and detachment are easy, the space requirementis low, and the problem that as tie beams exist between a pier and a pile foundation, operation is difficult is solved; hoisting chain blocks can be used for lowering and adjusting the steel cofferdamand can also be used for lowering materials and formworks in the later stage, and the construction efficiency is greatly improved.

Description

technical field

[0001] The invention belongs to the field of civil engineering, and in particular relates to a bridge reinforcement technology, in particular to a method for installing a steel cofferdam for strengthening the underwater structure of a bridge. Background technique

[0002] Bridge underwater structures such as bridge piers and pile foundations are structures that support the bridge span structure and transmit the constant section and vehicle live load to the foundation. Due to the comprehensive influence of long-term loads and various complex environments, bridge piers often have concrete damage and exposed reinforcement In order to ensure the overall safety of the bridge, it is necessary to implement timely reinforcement.

[0003] In my country, most of the bridge piers are underwater, and the underwater environment is harsh and there are many uncertain factors. Under normal circumstances, the underwater reinforcement method of bridge piers uses steel cofferda...

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