Gravity-type bridge pier demolition system construction method

Abstract

The invention relates to a gravity-type bridge pier demolition system construction method. The gravity-type bridge pier demolition system construction method includes the following steps of 1) preparation for construction; 2) driving construction of steel sheet piles; 3) laying of a lifting work platform; 4) laying of a sewage treatment system; 5) bridge pier cutting construction; 6) lifting of bridge pier cut-off section; and 7) removal of bridge pier waste slag. The gravity-type bridge pier demolition system construction method has the beneficial effects that pile-side hoops are arranged onthe outer side walls of steel pipe piles, the driving direction of the steel sheet piles is defined by longitudinal support beams, transverse support beams, outer guide baffles and inner guide baffles, the accuracy of position control for driving of the steel sheet piles can be improved, and coordinated stress of the steel pipe piles and the steel sheet piles can be realized; the annular stiffnessof the steel sheet piles is improved through internal support ring beams and ring beam angle braces, and the stress performance of the steel sheet piles is further improved; and ash settling ponds are arranged on the inner side walls of the steel sheet piles, a first filter plate and a second filter plate are arranged on the inner side walls of the ash settling ponds, and the requirements for multi-layer slag settling treatment in a cofferdam can be met.

Description

technical field [0001] The invention relates to a construction method of a gravity type bridge pier demolition system, belongs to the field of bridge engineering, and is suitable for partial demolition construction projects of urban bridges. Background technique [0002] With the continuous improvement of urban construction and motor vehicle ownership, some existing bridges are no longer able to meet the growing traffic needs. During the demolition and construction of old bridges, the removal of bridge piers is often a difficult point in on-site control, especially in how to improve the efficiency of demolition construction, reduce the impact of construction on the surrounding environment, and improve the safety of demolition construction devices. [0003] In the prior art, there is a construction method for demolition of existing gravity piers by blasting, which is characterized by piercing small-diameter (38mm) dense shallow holes within the filling length range, and combi...

AI Technical Summary

Problems solved by technology

Although this construction method can speed up the efficiency of bridge demolition to a certain extent, it is difficult to achieve effective environmental protection and improve construction efficiency during the construction process.

At the same time, for the demolition of bridge piers in water, there are still problems to be solved urgently, such as the installation of steel sheet pile cofferdams, environmentally friendly demolition of bridge piers, and efficient hoisting on site.

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