Earth and rockfill dam milling excitation frequency and excitation force real-time monitoring system and monitoring method

Abstract

The invention belongs to the field of earth and rockfill dam construction quality control, and belongs to a method for carrying out remote real-time monitoring and subsequent quality assessment on the milling machine excitation frequency and the excitation force. Therefore the method adopts the technical scheme that an earth and rockfill dam milling excitation frequency and excitation force real-time monitoring system and monitoring method comprises he following steps that vibration acceleration signals in the vertical direction of a milling wheel are collected in real time in the process of milling earth and rockfill dam materials by using a milling machine excitation frequency testing module arranged on a part which is arranged on a milling machine vibration wheel and does not rotate along with the vibration wheel, the frequency spectrum data of the vibration acceleration of the milling wheel is obtained through signal analog-to-digital conversion and fast Fourier transformation (FFT), a corresponding relationship among the excitation frequency, the excitation force and the milling machine position coordinates is built according to the same sampling moment, whether the excitation frequency and the excitation force of a milling machine at the current moment conform to the design standard or not is judged, and if the excitation frequency and the excitation force do not reach the standard, warning is sent. The method provided by the invention is mainly applied to the earth and rockfill dam construction quality control.

Description

technical field [0001] The invention belongs to the field of construction quality control of earth-rock dams, in particular to a real-time monitoring system and monitoring method for the excitation frequency and force of a rolling machine during the rolling process of an earth-rock dam. Background technique [0002] During the construction of earth-rock dams, effective control of rolling parameters is the key to achieving good compaction effects and ensuring the quality of dam construction. As important rolling parameters, the exciting frequency and exciting force not only directly affect the operating efficiency of the rolling machine, but also affect the movement state of the particles of the compacted earth-rock dam material, thereby affecting the compaction effect. According to the "Code for Construction of Roller-Compacted Earth-rock Dams" (DL / T5129-2001), the working performance of the roller compactor should be checked regularly to ensure that the excitation frequency...

AI Technical Summary

Problems solved by technology

Although the above-mentioned devices can realize real-time monitoring of the vibration frequency of the rolling machine, they cannot monitor the actual output excitation force of the rolling machine, and their main service objects are the operators of the rolling machine. The main responsible persons are supervisors, construction managers and owners

Obviously, since the real-time monitoring data cannot be remotely transmitted and subsequently applied, these existing technologies or devices cannot realize online synchronous control of the excitation frequency and force of the roller compactor by the owners, supervisors, and construction managers.

In addition, the excitation frequency measured by these domestically developed technologies or devices does not correspond to the absolute coordinates of the earth, so it is difficult to obtain the specific location where the excitation frequency does not meet the standard in actual construction, and it is not convenient for relevant managers to carry out feedback control on construction quality

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