Construction method of conveying concrete downwards with large drop

Abstract

The invention discloses a construction method for large-drop downward concrete transporting. The construction method comprises the steps of downward concrete transporting device installing, long articulated chute support reinforcing and moisturizing and buffer device installing, pedestrian overhauling channel arranging and articulated chute downward concrete transporting operation control. The problem that concrete cannot be directly downwards transported from a large-drop steep precipice is solved from pit large-drop steep precipice downward concrete transporting device installing, long articulated chute support reinforcing and moisturizing and buffer device installing, pedestrian overhauling channel arranging, the concrete working performance and other links. The construction method for large-drop downward concrete transporting has the advantages that the transporting pipeline structure is simple; the technological process operation is easy; pipe blocking and pipe exploding are not prone to happening; the concrete transporting efficiency is high; and the equipment cost is low. Meanwhile, the pressure loss problem caused by concrete pumping is avoided. The construction method is suitable for underground engineering, especially concrete transporting and pouring of a subway, a tunnel, an urban underground complex and other pit projects.

Description

technical field [0001] The invention relates to a construction method for conveying concrete, in particular to a construction method for conveying concrete downwards with a large drop. Background technique [0002] The problems encountered in the construction of pumping concrete downwards with a large drop mainly include: [0003] ①During the process of pumping concrete, the self-falling speed of the concrete itself exceeds the pumping speed of the delivery pump, causing the concrete to self-flow and form segregation, and finally cause pipe blockage; [0004] ②During the pump stop process, the concrete in the downhill section will flow due to its own weight, causing an air column to form in the pipeline. During the continuous pumping process, the air column is equivalent to a section of spring, absorbing the pumping pressure, causing the pump to stop moving and the pipe to be stuck ; [0005] ③ The pumping performance of concrete is affected by various factors such as ceme...

AI Technical Summary

Problems solved by technology

[0003] ①During the process of pumping concrete, the self-falling speed of the concrete itself exceeds the pumping speed of the delivery pump, causing the concrete to self-flow and form segregation, and finally cause pipe blockage;

[0006] ④Slurry leakage at the pipe clamp, excessive use of the pipe clamp and the pump pipe, resulting in pipe detachment and bursting, and segregation caused by reverse pump after the pump is stopped.

[0007] The conventional downward pumping concrete construction technology has brought many difficulties to the construction due to the above problems

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