Real-time visual feed control method for compaction quality of roller compacted concrete

Abstract

The invention discloses a real-time visual feed control method for compaction quality of roller compacted concrete on-site construction. The method comprises the steps of model establishment, data acquisition and processing and information feedback online control. The method comprises the steps that a 3D dynamic model of an operation unit in the building structure construction process is constructed, random actual measurement point data of a construction operation layer are collected, compaction degree evaluation indexes of the operation layer unit are obtained through an analysis model, and compaction quality representation of the whole operation layer is obtained; and the visual information is dynamically and comprehensively displayed on the 3D model of the construction layer unit in real time. According to the invention, accurate representation of the actual working condition on site is achieved by adopting the rolling process parameters such as the moisture content of the real-timemixing material, the stress wave velocity of the current rolling layer when colling is completed, and rolling vehicle positioning data, the model precision is high, the rolling quality condition canbe visually mastered in real time, remotely, relatively accurately and quantitatively, a feed control decision is formed, and the method has good adaptability to different construction working conditions.

Description

technical field [0001] The invention belongs to the technical field of concrete pouring quality supervision and control, in particular to the technical field of roller compacted concrete compaction quality control, and relates to a real-time visual feed-control method for on-site construction compaction quality of roller compacted concrete. Background technique [0002] The construction method of roller compacted concrete is to compact the ultra-dry hard concrete through the combined action of strong mechanical vibration and rolling. Due to the construction method of mechanical layering, the compaction quality of the hot roller compaction layer has always been the key to the construction quality control of roller compacted concrete. The amount of concrete mixing materials is usually characterized by the VC value of the Viber consistency method. At present, the commonly used rolling quality evaluation method in the field is the nuclear density meter method, but it has the fol...

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Problems solved by technology

[0003] The measurement process is cumbersome: it is necessary to drill a hole on the surface of the rolled and rolled concrete to the depth required by the specification, then put the nuclear density meter into the hole, measure the degree of compaction at the position, and record the measurement data manually; the reliability is low: The nuclear density meter method mainly relies on radioactive elements to test the content of elements related to the compaction quality in concrete, and compares it with the laboratory calibration value to obtain the compaction value; but in actual measurement, the test results in different directions at the same position There are some differences, and the reliability is low; safety risk: the nuclear density meter contains radioactive elements, and there is a risk of radiation and leakage when used or lost; repeated calibration: the instrument mainly relies on radioactive elements for detection, and the elements will decay every time. There are errors in the test results, which need to be re-calibrated; the test is not representative enough: because the nuclear density instrument detects the degree of compaction at a random single point after the rolling is completed, it is impossible to perform a large number of real-time tests, and the efficiency of the test points is low. Multiple measuring points reflect the quality of the overall rolled layer

However, this kind of monitoring model still has the following deficiencies: the simulation parameters are mostly selected by relying on past engineering experience or simulating the field standard test section, but in fact, the on-site rolling conditions and changing conditions are different from those of the test cabin in terms of material thickness, rolling The number of pressing times, the walking speed of the rolling machine, and the operating conditions of the excitation force are often quite different in the process, so the accuracy and reliability of the simulation real-time working conditions are significantly different; because the value of the VC value of the warehouse surface lacks real-time and accurate Effective characterization, the selected VC value as the parameter of the rollability of the mixture and then the evaluation of the rolling quality lacks authenticity to a certain extent; due to the inability to realize the compactness detection of a large number of measuring points under field conditions, some rolling A single compaction value reflects the rolling effect of the rolling strip, and cannot objectively describe the quantitative characteristics of the differences in different parts of the rolling layer plane, and the accuracy of construction compaction quality monitoring is relatively low

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