本文選題：預(yù)應(yīng)力 + 孔道灌漿��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：近年來(lái)，隨著預(yù)應(yīng)力混凝土結(jié)構(gòu)在工程中的普遍應(yīng)用，對(duì)這類(lèi)工程結(jié)構(gòu)質(zhì)量的檢測(cè)也越來(lái)越受到重視。有粘結(jié)的后張拉預(yù)應(yīng)力孔道灌漿是為了使預(yù)應(yīng)力筋束與混凝土結(jié)合良好，將預(yù)應(yīng)力分散分布于構(gòu)件上，減輕錨具及結(jié)構(gòu)兩端負(fù)擔(dān)；避免預(yù)應(yīng)力筋束被銹化腐蝕而影響結(jié)構(gòu)或構(gòu)件的安全使用壽命及其耐久性。但是由于施工過(guò)程中工人灌漿技術(shù)的不成熟、孔道堵塞、水泥漿的膨脹率和稠度指標(biāo)控制不好、壓漿時(shí)壓力不夠或封堵不嚴(yán)、灌漿漿體的泌水率和流動(dòng)度等性能指標(biāo)未達(dá)到設(shè)計(jì)要求等原因，預(yù)應(yīng)力孔道內(nèi)部可能存在裂縫、空隙等，這些缺陷將會(huì)導(dǎo)致預(yù)應(yīng)力筋局部得不到保護(hù)而銹蝕，影響預(yù)應(yīng)力筋的壽命。預(yù)應(yīng)力構(gòu)件達(dá)不到設(shè)計(jì)要求，結(jié)構(gòu)承載力下降，從而導(dǎo)致結(jié)構(gòu)破壞。 目前，我國(guó)尚無(wú)一套較成熟的測(cè)試技術(shù)標(biāo)準(zhǔn)，可用于預(yù)應(yīng)力管道的灌漿質(zhì)量評(píng)價(jià)。本文針對(duì)預(yù)應(yīng)力預(yù)留管道內(nèi)部灌漿質(zhì)量的無(wú)損檢測(cè)技術(shù)開(kāi)展了較深入的理論和試驗(yàn)研究，利用應(yīng)力波在混凝土中傳播的各種參數(shù)變化的特點(diǎn)，采用已有無(wú)損檢測(cè)經(jīng)驗(yàn)及分析方法進(jìn)行試驗(yàn)及數(shù)據(jù)分析處理等研究,本論文進(jìn)行了以下工作： 1、闡述了無(wú)損檢測(cè)技術(shù)的發(fā)展及其在預(yù)應(yīng)力管道灌漿質(zhì)量檢測(cè)中的應(yīng)用和特點(diǎn)。綜合國(guó)內(nèi)外發(fā)展現(xiàn)狀，總結(jié)已有的檢測(cè)方法及其存在的問(wèn)題，重點(diǎn)探討以彈性波屬性為基礎(chǔ)的無(wú)損檢測(cè)技術(shù)的理論方法及其應(yīng)用。 2、以彈性波屬性的基本理論為依據(jù)，，通過(guò)對(duì)彈性波波速、頻率和能量衰減屬性的綜合分析研究，建立各屬性與孔道缺陷之間的相對(duì)應(yīng)關(guān)系，形成了具有一定實(shí)驗(yàn)研究基礎(chǔ)的測(cè)試?yán)碚摗?3、基于以往沖擊回波無(wú)損檢測(cè)技術(shù)的方法與原理，提出了一套較完整的基于彈性波的無(wú)損檢測(cè)檢測(cè)評(píng)價(jià)體系,來(lái)對(duì)預(yù)留孔道內(nèi)部灌漿的質(zhì)量進(jìn)行定性與定位分析。該評(píng)價(jià)體系綜合了彈性波在介質(zhì)中的傳播速度、頻率及能量衰減屬性，權(quán)衡了各屬性對(duì)缺陷的響應(yīng)特性，利用這三種屬性綜合評(píng)價(jià)孔道灌漿質(zhì)量減小了各單一屬性評(píng)價(jià)指數(shù)影響因素的影響，達(dá)到了較理想的檢測(cè)效果。 4、將本文的研究成果應(yīng)用于現(xiàn)場(chǎng)工程預(yù)應(yīng)力橋梁的管道壓漿質(zhì)量檢測(cè)評(píng)估,結(jié)合現(xiàn)場(chǎng)實(shí)際檢測(cè)的特點(diǎn)編制了相應(yīng)的灌漿質(zhì)量檢測(cè)程序,建立診斷試驗(yàn)結(jié)論的模型,取得了良好的效果。證明了該套無(wú)損檢測(cè)方法在實(shí)際檢測(cè)過(guò)程中具有良好的工程適應(yīng)性及可靠性,為同類(lèi)工程的有效檢測(cè)提供了有益的參考。
[Abstract]:In recent years, with the widespread application of prestressed concrete structures in engineering, more and more attention has been paid to the quality detection of these structures. The post-tensioned pre-stressed channel grouting is designed to combine the prestressed tendons with the concrete, distribute the prestress on the members, and reduce the burden on the anchors and the two ends of the structure. To avoid the corrosion of prestressing tendons to affect the safety service life and durability of structures or members. However, due to the immature grouting technology of workers, the blockage of holes, the poor control of the expansion rate and consistency index of the cement slurry, the insufficient pressure or the lax sealing during the grouting process, The performance indexes of grouting slurry, such as bleeding rate and fluidity, do not meet the design requirements, and there may be cracks and voids in the prestressing channels. These defects will lead to the failure of local protection and corrosion of prestressed tendons. The life of prestressed tendons is affected. The prestressed members can not meet the design requirements and the bearing capacity of the structure decreases, which leads to the destruction of the structure. At present, there is not a set of mature technical standard for grouting quality evaluation of prestressed pipeline in China. In this paper, a deep theoretical and experimental study has been carried out on the nondestructive testing technology of the internal grouting quality of the pre-stressed reserved pipeline, and the characteristics of the variation of various parameters propagating in concrete by the stress wave are used. In this paper, the following work has been done: (1) using the existing experience of nondestructive testing and analysis methods to carry out experiments and data analysis and processing, the following work has been done in this paper: 1. The development of nondestructive testing technology and its application and characteristics in the quality testing of prestressed pipeline grouting are described. In this paper, the existing testing methods and their existing problems are summarized, and the theoretical methods and applications of nondestructive testing technology based on elastic wave properties are discussed. 2. On the basis of the basic theory of elastic wave properties, through the comprehensive analysis and study of the elastic wave velocity, frequency and energy attenuation properties, the corresponding relationship between each attribute and the hole defect is established. The test theory with certain experimental research foundation has been formed. 3. Based on the previous methods and principles of impact echo nondestructive testing (NDT), a complete evaluation system based on elastic wave is proposed to qualitatively and localize the quality of internal grouting in reserved channels. The evaluation system synthesizes the properties of the velocity, frequency and energy attenuation of elastic wave in the medium, and balances the response characteristics of each attribute to the defect. The comprehensive evaluation of grouting quality by these three attributes reduces the influence of each single attribute evaluation index and achieves an ideal testing effect. 4. The research results of this paper are applied to the pipeline grouting quality detection and evaluation of the prestressed bridge in the field engineering, and the corresponding grouting quality detection program is compiled according to the characteristics of the field actual inspection, and the model of the diagnostic test conclusion is established. Good results have been achieved. It is proved that this nondestructive testing method has good engineering adaptability and reliability in the process of practical testing and provides a useful reference for the effective detection of similar projects.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U445.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李長(zhǎng)文,余春昊,張銀海,胡學(xué)紅,申毅;巖石聲波主頻漂移現(xiàn)象及其應(yīng)用探討[J];測(cè)井技術(shù);1999年04期

2 賈曉光;;X射線(xiàn)成像技術(shù)在物證鑒定中的應(yīng)用分析[J];廣東公安科技;2008年03期

3 張全升;吳佳曄;魏永高;;預(yù)應(yīng)力梁孔道灌漿質(zhì)量的無(wú)損檢測(cè)技術(shù)對(duì)比研究[J];公路交通科技(應(yīng)用技術(shù)版);2010年12期

4 鄒春江;陳征宙;董平;曹東方;吳詠敬;;沖擊回波主頻對(duì)箱梁預(yù)應(yīng)力孔道注漿飽滿(mǎn)度的響應(yīng)及應(yīng)用[J];公路交通科技;2010年01期

5 李躍華;孫銳;趙燦珠;廖習(xí)東;;橋梁預(yù)應(yīng)力孔道注漿質(zhì)量檢測(cè)探討[J];工程地球物理學(xué)報(bào);2012年01期

6 李宏兵;張佳佳;姚逢昌;;巖石的等效孔隙縱橫比反演及其應(yīng)用[J];地球物理學(xué)報(bào);2013年02期

7 潘海結(jié);;探地雷達(dá)技術(shù)在橋梁結(jié)構(gòu)無(wú)損檢測(cè)中的應(yīng)用研究[J];華東公路;2012年01期

8 閆桂京,陳建文,吳志強(qiáng);地層巖性與地震波速度的關(guān)系分析[J];海洋地質(zhì)動(dòng)態(tài);2005年09期

9 吳佳曄;安雪暉;田北平;;混凝土無(wú)損檢測(cè)技術(shù)的現(xiàn)狀和進(jìn)展[J];四川理工學(xué)院學(xué)報(bào)(自然科學(xué)版);2009年04期

10 傅翔,宋人心,王五平,羅騏先;沖擊回波法檢測(cè)預(yù)應(yīng)力預(yù)留孔灌漿質(zhì)量[J];施工技術(shù);2003年11期

相關(guān)博士學(xué)位論文 前1條

1 秦瑩;基于系統(tǒng)動(dòng)力響應(yīng)的錨固結(jié)構(gòu)無(wú)損檢測(cè)及模型試驗(yàn)研究[D];武漢理工大學(xué);2009年

本文編號(hào)：1922945