Simple equipment for measuring underwater concrete elevation

Abstract

The invention provides simple equipment for measuring the underwater concrete elevation. The simple equipment comprises a simple closed circuit buzzer alarm, and a hand cranking rotation shaft for assisting in controlling lifting of a cover barrel cone; the hand cranking rotation shaft is connected with the cover barrel cone through a graduated non-telescopic lifting rope, the lifting rope is in transmission with a movable pulley through a fixed pulley, the movable pulley is connected with an upper top plate through a spring tension meter, and the spring tension meter is connected with and controls a buzzer alarm closed circuit switch; the side wall of a lower cavity conical body of the cover barrel cone is provided with a plurality of sets of round holes, and the lower portion of a middlecavity column body of the cover barrel cone is fixedly provided with a stereoscopic annular mesh enclosure; the cover barrel cone is connected with the lifting rope through a nut; the upper portion of the cover barrel cone is provided with a cavity cone body of which the side wall can be opened and closed; the cavity cone body provided with the round holes is connected with the cavity column bodytrough a plurality of connection rebars, and the effect that underwater concrete coarse aggregate can successfully pass through the gaps between the connection rebars is ensured.

Description

technical field [0001] The invention belongs to the technical field of building construction equipment, and relates to the construction of pile foundation caps of building structures, in particular to underwater pouring concrete for pile foundations and cap bottom sealing concrete, which is mainly used for controlling the elevation of underwater pouring concrete, specifically a method for measuring water Simple equipment for lowering the concrete level. Background technique [0002] Since the beginning of the new century, with the vigorous development of my country's construction industry, more and more investment has been made in the construction of infrastructure such as high-speed railways, expressways, high-rise buildings, and large bridges. Most of these infrastructures use pile foundations and row Pile support, and most of them need to be poured with cap cap bottom-sealing concrete, so how to control the quality of these underground concealed projects has become a key i...

AI Technical Summary

Problems solved by technology

As we all know, the quality of the pile cap is largely related to the height control of underwater concrete pouring, mainly in the following two aspects: First, the concrete pouring height is too low, it will not meet the design requirements, which will seriously affect the bearing capacity of the pile foundation , the caps cannot meet the anti-uplift requirements; the second is that the concrete pouring height is too high, which will lead to serious overfilling, which not only wastes concrete resources, increases the cost of engineering materials, but also increases the difficulty of later demolition, affecting construction efficiency

[0003] At present, there are two relatively mature technologies used in my country to measure the elevation of underwater pouring concrete. One is to use the method of measuring rope with scale and measuring hammer to estimate the elevation of concrete pouring surface. This method requires a lot of experience for operators. high, and the measuring hammer is likely to encounter a thicker scum or laitance layer, resulting in misjudgment; the second is to use mechanical equipment to fish out the underwater concrete, and judge the pouring surface elevation by experience by observing the concrete composition. Measure the height once in a while, the operation is troublesome, the labor intensity is high, and the work efficiency is low

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