【摘要】：近年來,我國進(jìn)行大規(guī)模的基礎(chǔ)建設(shè),施工技術(shù)也日新月異,而基礎(chǔ)形式之一的樁基礎(chǔ)也由于其承載力大、適用性廣泛,多種復(fù)雜地基均可使用,在建設(shè)領(lǐng)域逐漸顯現(xiàn)出其優(yōu)越性,所以樁基礎(chǔ)被廣泛應(yīng)用于高層建筑、路基及大型橋梁等的基礎(chǔ)工程之中。其中混凝土灌注樁被使用的最為廣泛,尤其承載力要求非常高的地方一般都會(huì)采用混凝土灌注樁。樁基礎(chǔ)是建筑物最底層的根基,是隱蔽工程,其主要特點(diǎn)是施工程序多、難度大、技術(shù)高。檢測樁身完整性具有多種方法,其中聲波透射法具有操作簡易、檢測全面、經(jīng)濟(jì)可靠等優(yōu)點(diǎn),同時(shí)對于樁基礎(chǔ)來說是一種無損檢測,聲波透射法在檢測樁身完整性領(lǐng)域被廣泛應(yīng)用。本文將對聲波透射法做進(jìn)一步的研究。第一步,詳細(xì)介紹超聲波的基本原理及檢測方法;然后,針對超聲波透射方法檢測局限性,即盲區(qū)和聲波的影響范圍,提出聲波透射法測試點(diǎn)波形分析的重要性。針對樁身各種缺陷對聲學(xué)參數(shù)的不同影響的特點(diǎn),提出運(yùn)用波幅、聲速、PSD值對基樁進(jìn)行綜合判斷,并提出了判斷樁身缺陷性質(zhì)的技巧。針對《建筑基樁檢測技術(shù)規(guī)范》中對基樁完整性分類的規(guī)定,總結(jié)利用聲波透射法檢測灌注樁并將之分類的不合理之處,并提出個(gè)人看法進(jìn)行相應(yīng)改進(jìn)。本文最后通過津?qū)幐咚俟饭こ踢M(jìn)行實(shí)例分析研究,采用改進(jìn)后的灌注樁聲波透射法檢測技術(shù)對其進(jìn)行檢測,總結(jié)了改進(jìn)后的聲波透射法對提高灌注樁質(zhì)量檢測的準(zhǔn)確性的各方面優(yōu)勢。經(jīng)過本文的研究,改進(jìn)灌注樁聲波透射法的檢測技術(shù)之后,不僅可以提高工程質(zhì)量、而且能夠縮短施工工期、同時(shí)降低施工成本、最終保證工程項(xiàng)目施工安全,使用安全。本文研究的相關(guān)成果對于灌注樁樁身完整性檢測有一定的借鑒作用。
[Abstract]:In recent years, large-scale foundation construction has been carried out in our country, and the pile foundation, which is one of the foundation forms, has been widely used because of its large bearing capacity and wide applicability, and a variety of complex foundations can be used, so the pile foundation is widely used in the foundation engineering of high-rise buildings, roadbed and large bridges. Among them, concrete cast-in-place pile is the most widely used, especially where the bearing capacity is very high, concrete cast-in-place pile is generally used. Pile foundation is the foundation of the lowest floor of the building and is a hidden project. Its main characteristics are many construction procedures, great difficulty and high technology. There are many methods to detect pile integrity, among which acoustic transmission method has the advantages of simple operation, comprehensive detection, economic reliability and so on. At the same time, it is a kind of nondestructive testing for pile foundation. Acoustic transmission method is widely used in the field of pile integrity testing. In this paper, the acoustic transmission method will be further studied. In the first step, the basic principle and detection method of ultrasonic wave are introduced in detail. Then, aiming at the limitation of ultrasonic transmission method, that is, the blind area and the influence range of acoustic wave, the importance of waveform analysis of acoustic transmission method is put forward. According to the characteristics of different effects of various defects on acoustic parameters, this paper puts forward a comprehensive judgment of foundation pile by using amplitude, sound velocity and PSD value, and puts forward some skills for judging the defect property of pile body. In view of the regulations on the integrity classification of foundation piles in the Technical Code for pile testing of Building Foundation, this paper summarizes the irrationality of using acoustic transmission method to detect and classify cast-in-place piles, and puts forward some personal views for corresponding improvement. Finally, through the example analysis and research of Jinning Expressway, the improved acoustic transmission method of cast-in-place pile is used to detect it, and the advantages of the improved acoustic transmission method in improving the accuracy of quality detection of cast-in-place pile are summarized. After the research in this paper, after improving the detection technology of acoustic transmission method of cast-in-place pile, it can not only improve the quality of the project, but also shorten the construction period, reduce the construction cost, and finally ensure the construction safety and safety of the project. The related results of this paper can be used as a reference for the integrity detection of cast-in-place pile.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU473.16

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相關(guān)期刊論文 前1條

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本文編號：2508177