桥梁预应力管道注浆质量检测仪的研发与应用

发布时间：2018-05-26 19:04

本文选题：预应力管道 + 注浆质量检测仪　；参考：《长江大学》2014年硕士论文

【摘要】：桥梁预应力管道注浆施工被视为一项隐蔽工程,注浆质量的好坏取决于施工工艺和施工管理水平,在实际生产过程中,注浆后的梁体往往存在注浆不密实和完全空管的情况,很难达到设计要求。近年来,梁体预应力消失导致的大桥坍塌事故时有发生,造成重大安全事故和经济损失。预应力体系的优势是建立在预应力筋与混凝土黏结完好的基础上,预应力管道注浆质量的好坏直接影响整个预应力结构的安全性、可靠性和使用寿命。因此,必须对桥梁预应力管道的注浆质量进行检测,排除桥梁的安全隐患,确保桥梁施工质量达到设计要求和合理受力状态。目前,国内外还没有一套系统完善的桥梁预应力管道注浆质量检测技术,针对当今工程质量无损检测的要求,开展桥梁预应力管道注浆质量检测技术的研究工作具有十分重要的价值。本文以云南航天工程物探检测股份有限公司科研项目为依托,进行了桥梁预应力管道注浆质量检测成套技术研究,研究工作主要取得了以下成果： 1、查阅了大量国内外相关文献,对桥梁预应力管道注浆质量检测的发展现状作了归纳和总结,并以此为参考,探索一种准确、高效的预应力管道注浆质量检测的新思路,结合桥梁检测的实际需求进行了新思路的可行性验证。 2、重点阐述了基于弹性波动理论的预应力管道注浆质量检测原理,在现有检测技术的基础上,对预应力管道注浆缺陷定位技术的相关理论进行了更深一步的理论推导。 3、首次对桥梁预应力管道注浆质量检测的震源和信号进行了研究,并对特定震源信号下不同饱满度管道响应的波速、能量衰减和频移等特征值作了数理统计。 4、研发了一套基于Wi-Fi无线传输技术的桥梁预应力管道注浆质量检测仪,仪器配备可控超磁震源和专业预应力管道注浆质量检测信号采集与分析软件,具备注浆饱满度等级快速智能评价和注浆缺陷定位功能,仪器的准确性和稳定性得到模型验证试验验证。 5、参照云南省桥梁检测地方标准,建立了一套高效的预应力管道注浆质量检测流程,经项目推广应用,桥梁预应力管道注浆质量检测成套技术的适用性和高效性得到了业主和第三方检测单位的一致认可。
[Abstract]:The grouting construction of prestressed bridge pipeline is regarded as a hidden project, and the quality of grouting depends on the construction technology and construction management level. In the actual production process, the grouting beam body often exists the situation that the grouting is not dense and the empty pipe is completely empty. It is difficult to meet the design requirements. In recent years, bridge collapses caused by the loss of beam prestressing force occur from time to time, resulting in major safety accidents and economic losses. The advantage of prestressed system is that the quality of prestressed pipe grouting directly affects the security, reliability and service life of the whole prestressed structure. Therefore, it is necessary to check the grouting quality of bridge prestressed pipeline, eliminate the hidden danger of bridge safety, and ensure that the quality of bridge construction meets the design requirements and reasonable stress state. At present, there is not a set of systematic and perfect grouting quality inspection technology for bridge prestressed pipeline at home and abroad. It is of great value to carry out the research on grouting quality detection technology of bridge prestressed pipeline. Based on the scientific research project of Yunnan Aerospace Engineering Geophysical Exploration and testing Co., Ltd., this paper has carried out a complete set of technology research on grouting quality testing of prestressed bridge pipeline. The research work has obtained the following results: 1. A large number of domestic and foreign literatures are consulted, and the present situation of grouting quality detection of prestressed bridge pipeline is summarized and summarized. Based on this, a new idea of accurate and efficient grouting quality detection for prestressed pipeline is explored. The feasibility of the new train of thought is verified according to the actual demand of bridge detection. 2. The principle of grouting quality detection of prestressed pipeline based on elastic fluctuation theory is expounded. On the basis of the existing inspection technology, the related theory of grouting defect location technology in prestressed pipeline is further deduced. 3. For the first time, the source and signal of grouting quality detection for bridge prestressed pipeline are studied, and the characteristic values of wave velocity, energy attenuation and frequency shift of pipeline with different plumpness under specific source signal are calculated. 4. Based on Wi-Fi wireless transmission technology, a grouting quality detector for bridge prestressed pipeline is developed. The instrument is equipped with vibromagnetic source and professional prestressing pipeline grouting quality detection signal acquisition and analysis software. It has the function of quick and intelligent evaluation of grouting fullness and localization of grouting defects. The accuracy and stability of the instrument are verified by model verification test. 5. Referring to the local standard of bridge inspection in Yunnan Province, a set of high efficient grouting quality inspection flow of prestressed pipeline has been established, which has been popularized and applied by the project. The applicability and efficiency of the whole set of grouting quality testing technology for bridge prestressed pipeline have been unanimously recognized by the owner and the third party inspection unit.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U446

【参考文献】