本文關鍵詞： 孔道灌漿 無損檢測 數(shù)值模擬 彈性波屬性　出處：《重慶交通大學》2014年碩士論文　論文類型：學位論文

【摘要】：預應力混凝土結構由于使用了高強材料，不但節(jié)省大量的鋼材和混凝土，還提升了結構的剛度、耐久性等，在我們國家的整個基礎設施建設領域得到了廣泛的應用，但由此帶來的預應力筋銹蝕問題顯得格外突出，并且由此引發(fā)的質(zhì)量事故也在逐年增加。對于預應力孔道灌漿飽滿度的無損檢測，國內(nèi)外的研究者們經(jīng)過多年的理論研究和現(xiàn)場檢測，取得了大量寶貴的理論成果和試驗經(jīng)驗，在一些工程實踐中，也有了一些應用；但是受到理論研究、技術水平、檢測設備等多方面因素的限制，且缺乏相應的技術規(guī)程，在這一領域的研究沒有取得實質(zhì)性進展。 本文是根據(jù)漿體與巖體的相似性，基于地球物理勘探原理，通過數(shù)值模擬分析彈性波在漿體中的傳播規(guī)律，研究彈性波屬性的變化規(guī)律，既而為孔道灌漿飽滿度檢測工作提供新思路、新方法。文章首先介紹了當前孔道灌漿的施工工藝，從工藝入手分析了孔道灌漿病害的種類以及產(chǎn)生的原因，為模擬孔道灌漿后的病害種類提供依據(jù)；接著分析總結了彈性波屬性在實際工程中的應用，通過對這些應用的分析研究，可以為建立彈性波屬性評價理論提供依據(jù)；通過數(shù)值模擬技術，研究彈性波在不同飽滿度狀況下的轉播規(guī)律，經(jīng)過處理分析，從中找出與飽滿度有相關關系的彈性波屬性參數(shù)，通過建立實體物理模型進行驗證，，并將其應用到實際飽滿度檢測中。 基于彈性波的地震屬性技術在石油勘探領域的應用已經(jīng)很成熟，而在交通土建無損檢測領域，彈性波屬性的應用還存在較大的局限性，近些年來這一領域的研究并沒有實質(zhì)性進展；作者在研讀了大量地震屬性方面的資料后，試著從地球物理勘探的技術思路出發(fā)，把地震屬性技術移植到工程無損檢測領域，可為預應力孔道灌漿飽滿度檢測提供了新的思路。
[Abstract]:Because of the use of high-strength materials, prestressed concrete structures not only save a lot of steel and concrete, but also improve the stiffness and durability of the structure. In our country, the whole field of infrastructure construction has been widely used, but the problem of the corrosion of prestressed tendons is particularly prominent. And the quality accident caused by it is also increasing year by year. For the non-destructive testing of the filling degree of prestressed hole grouting, researchers at home and abroad have been through many years of theoretical research and field testing. A large number of valuable theoretical results and experimental experience have been obtained, in some engineering practice, there are also some applications; However, limited by many factors, such as theoretical research, technical level, testing equipment and so on, and lack of corresponding technical regulations, no substantial progress has been made in this field. According to the similarity between slurry and rock mass and based on the principle of geophysical exploration, this paper analyzes the propagation law of elastic wave in slurry by numerical simulation, and studies the variation law of elastic wave attribute. Therefore, this paper provides a new idea and method for detecting the filling degree of hole grouting. Firstly, this paper introduces the construction technology of hole grouting at present, and analyzes the types and causes of the defects of hole grouting. It provides the basis for simulating the disease types after grouting. Then, the application of elastic wave attribute in practical engineering is analyzed and summarized. Through the analysis and research of these applications, the evaluation theory of elastic wave attribute can be established. Through numerical simulation technology, the relaying law of elastic wave under different degree of fullness is studied, and through processing and analysis, the attribute parameters of elastic wave which are related to the degree of fullness are found out. The physical model is established and applied to the actual fullness detection. Seismic attribute technology based on elastic wave is very mature in the field of petroleum exploration, but in the field of non-destructive detection of traffic civil engineering, the application of elastic wave attribute is still limited. No substantial progress has been made in this area in recent years; After reading a lot of seismic attribute data, the author tries to transplant seismic attribute technology to engineering nondestructive testing field based on the technical thinking of geophysical exploration. It can provide a new idea for detecting the filling degree of prestressed channel grouting.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.551

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