Bridge stand column support-free construction method

Abstract

A bridge stand column support-free construction method comprises the steps: processing of a stand column reinforcement cage: the stand column reinforcement cage is machined through a reinforcement cage jig frame; measuring the pre-embedded position of the stand column: lofting the direction line of the outer side line of the stand column onto a bearing platform template, and pulling out the central outline of the stand column by using a fine line to serve as a reference line of a stand column pre-embedded reinforcement cage; and integrally hoisting the stand column reinforcement cage: inserting the reinforcement cage into the bearing platform and not installing opposite-pull hook ribs and inner stirrups of the part above the bearing platform surface, binding the part of steel bars insertedinto the bearing platform after the stand column reinforcement cage is hoisted in place and fixed, and mounting the opposite-pull hook ribs and the inner stirrups within the range of the part above the bearing platform surface after a concrete surface is roughened and cleaned. Compared with the prior art, centralized modular machining, manufacturing and mounting of steel bars are achieved, the reinforcing steel bar machining jig frame and the reinforcing steel bar end positioning frame are used for machining the bridge stand column reinforcing cage in a workshop, and the reinforcing steel barpositioning precision and machining efficiency are improved; and traditional scaffold erecting and formwork erecting procedures are combined, and scaffold-formwork integration is adopted.

Description

technical field [0001] The invention belongs to the technical field of column construction, and in particular relates to a support-free construction method for bridge columns. Background technique [0002] In the construction of existing bridge columns, the steel cage binding frame has poor adaptability and cannot be adjusted. The same adjustable column steel cage binding frame is difficult to adapt to columns of different specifications, resulting in high column manufacturing costs; The mold for processing the column needs to be customized according to the size of the column. At the same time, it is considered that a connection block needs to be added to connect with the embedded base, resulting in heavy weight and unsuitable construction problems. Waste; in the conventional method, the bottom formwork of the column and the embedded base are connected and fixed in a single way, which affects the stress distribution and other properties of the embedded base. At the same time...

AI Technical Summary

Problems solved by technology

[0002] In the construction of existing bridge columns, the steel cage binding frame has poor adaptability and cannot be adjusted. The same adjustable column steel cage binding frame is difficult to adapt to columns of different specifications, resulting in high column manufacturing costs; The mold for processing the column needs to be customized according to the size of the column. At the same time, it is considered that a connection block needs to be added to connect with the embedded base, resulting in heavy weight and unsuitable construction problems. Waste; in the conventional method, the bottom formwork of the column and the embedded base are connected and fixed in a single way, which affects the stress distribution and other properties of the embedded base. At the same time, the same embedded base cannot carry and position different column molds. The use of the embedded base It is basically disposable, and the workload and consumption of processing materials do not match the frequency of use

[0003] The existing conventional bridge cast-in-place column technology has the following disadvantages: During the entire bridge construction process, the construction and operation of conventional bridges cannot meet the requirements of harmony, safety and environmental protection at the same time

1. Conventional column construction needs to build and dismantle temporary supports. During this process, because the construction machinery is too backward and outdated, mechanized construction cannot be carried out intensively, which in turn increases the labor cost input; 2. In open-air or bulk Under the action of the traditional steel bar processing mode, it does not have the characteristics of high safety and high efficiency.

In the process of scaffolding construction, it is easy to have a great impact on the greening and traffic under the bridge, and with the increase in the number of scaffolding, the construction intensity of the construction site is continuously improved, and the construction period is also extended, which is for the construction personnel. Personal safety has brought a great impact and caused new safety hazards

Images