Method of testing interior amplitude of concrete during pouring and vibrating

Abstract

A method of testing interior amplitude of concrete during pouring and vibrating includes: first, prefabricating a retaining wall for a simulated tunnel primary support face, setting on one side of theretaining wall, a steel formwork parallel to the retaining wall, setting at the two ends of the retaining wall and the steel formwork, two blocking plates perpendicular to the retaining wall, and allowing the retaining wall, the steel formwork and the two blocking plates to form a simulated tunnel lining that has no poured concrete; second, mounting a vibrator on the surface of one side, oppositeto the retaining wall, of the steel formwork; III, mounting in a pouring chamber, a plurality of sensors for detecting the interior amplitude of concrete; IV, pouring concrete into the pouring chamber, and starting the vibrator for vibrating; V, collecting vibrational signals detected by the sensors, and analyzing the vibrational signals to determine radiation width and radiation depth of the vibrator. Compared with the prior art, the method herein enables attenuation law of vibrational propagation in concrete to be more precisely analyzed, so that precise radiation width and depth of the vibrator can be acquired and utilized.

Description

technical field [0001] The invention relates to the technical field of concrete vibration testing, in particular to a test method for testing the internal vibration amplitude of concrete during pouring and vibration. Background technique [0002] Concrete is a heterogeneous brittle material formed by mixing sand and gravel aggregates, cement, water and other external materials. Due to the appearance of many air bubbles on the surface and inside of the concrete, not only the apparent quality of the concrete is affected, but also the concrete is not dense and the strength is low. The air bubbles inside and on the surface of the concrete are mainly caused by insufficient concrete vibration time or vibration leakage, and the air bubbles are not discharged. In the concrete pouring process, through certain experimental methods, specific concrete vibration parameters (layered pouring height, vibration duration, vibrator installation spacing, etc.) Vibration effect. [0003] The ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies existing in the prior art, the present invention provides a test method for testing the internal vibration amplitude of concrete during the pouring and vibrating process, which is used to solve the problem of “rising air bubbles” in the prior art when the concrete is observed with the naked eye during the pouring and vibrating process. Internal dynamics cannot be accurately grasped technical issues

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