Hydraulic lifting and hoisting method for steel-concrete combined section

Abstract

The invention discloses a method for hydraulic lifting and hoisting of a steel-concrete combined section, which comprises the following steps: S1, preparation before hoisting: assembling the steel-concrete combined section on the ground, and mounting a lifting lug and a lower lifting appliance at the top of the steel-concrete combined section; meanwhile, a bailey truss and an ultra-large component hydraulic lifter are installed on the concrete beam, and a special lifting appliance is connected with a lifting point of the lifter; s2, trying to lift: lifting the reinforced concrete section to be 100mm away from the ground, leveling the reinforced concrete section, and standing for 12 hours; s3, formal lifting is conducted, specifically, after the steel-concrete combined section is lifted to the position close to the design position, lifting is suspended, and all lifting points enable the lifted steel-concrete combined section to be accurately in place through the fine adjustment and inching functions of a computer synchronous control system; and S4, graded unloading is conducted, specifically, all loads of the steel-concrete combined section are transferred to a concrete beam, and then hydraulic lifting equipment and temporary lifting measures are dismantled. The construction quality can be effectively guaranteed, the construction efficiency is improved, the construction period is shortened, the construction risk is reduced, and the construction cost is controlled.

Description

technical field [0001] The invention relates to the technical field of hoisting methods, in particular to a method for hydraulic lifting and hoisting of a steel-concrete joint section. Background technique [0002] At present, in the construction process of the steel-concrete joint section of the main girder of a large bridge, the traditional steel-concrete joint section construction generally adopts the method of erecting an assembly platform at high altitude, high-altitude on-site assembly, or conventional hoisting methods. But there are many disadvantages in these two conventional construction methods. Due to the complex structure of the steel-concrete combination section, the amount of temporary measures for erecting the assembly platform at high altitude is too large, which increases the safety risk factor of high-altitude operations, and the on-site assembly increases the installation and construction period. If the conventional hoisting scheme is adopted, the install...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the steel-concrete joint section, the amount of temporary measures for the high-altitude assembly platform is too large, which increases the safety risk factor of high-altitude operations, and the on-site assembly increases the installation and construction period.

If the conventional hoisting scheme is adopted, the installation process is cumbersome, and the positioning is inaccurate, and repeated positioning operations are required, resulting in the disadvantages of low construction accuracy and slow operation speed

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