Continuous-beam 0#-block bottom-board-web mass-concrete temperature control construction method

Abstract

The invention belongs to the technical field of large-span continuous beam or large-span continuous rigid frame beam 0#-block construction, and provides a continuous-beam 0#-block bottom-board-web mass-concrete temperature control construction method. The continuous-beam 0#-block bottom-board-web mass-concrete temperature control construction method is used for solving the problems that as the span is large, and hydration heat of concrete is large when the thickness of a web and the thickness of a bottom board are larger than 1 m, an internal structure of concrete is damaged, the using performance of the concrete is influenced, diseases such as beam body cracks are caused. Air supply connecting pipes and reserved holes are formed in the 0#-block reinforcing-steel-bar binding and formwork installing process, and in the later stage, a central air-conditioning, a cold-air collection device and an air-supply supercharger are used for achieving the aims that high-pressure cold air is improved, heat generated through concrete hydration is reduced, and various concrete diseases caused when the internal temperature of the concrete is over high are avoided. According to the construction method, the problems that mass concrete in the conventional construction method is large in hydration heat, and the internal temperature is sharply increased are solved, the quality of the large-span-continuous-beam 0#-block construction process is guaranteed, the construction safety is guaranteed, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of large-span continuous beam or large-span continuous rigid beam 0# block construction, and in particular relates to a temperature-controlled construction method for large-volume concrete at the bottom web of continuous beam 0# block. Background technique [0002] With the rapid development of infrastructure facilities such as high-speed railways, expressways, and urban overpasses, bridges in structural forms such as long-span lines and rivers continue to appear, and the spans continue to increase. The height and thickness of 0# blocks continue to increase, and the thickness is greater than 1m. Concrete pouring and maintenance should be maintained and controlled according to mass concrete, but the existing construction technology has not yet matured the control method for this part, and the diseases caused by the heat of hydration of concrete are constantly emerging, causing cracks on the surface of the beam...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a continuous beam 0# block bottom in order to solve the problems of large span, large hydration heat of concrete with a thickness of web and bottom plate greater than 1m, damage to the internal structure of concrete, affect the performance of concrete, and cause cracks in the beam body and other diseases. The temperature-controlled construction method of web mass concrete to reduce the heat generated by hydration of mass concrete and ensure the construction quality of the beam body

Images