本文選題：路基壓實(shí)度 + 瑞雷波法�。� 參考：《長(zhǎng)沙理工大學(xué)》2014年碩士論文

【摘要】：路基是公路的重要結(jié)構(gòu)設(shè)施,壓實(shí)度是路基狀況的關(guān)鍵指標(biāo)之一,壓實(shí)度不足將導(dǎo)致路基病害產(chǎn)生�？梢酝ㄟ^(guò)壓實(shí)度算出路基回彈模量作為路面使用性能評(píng)價(jià)和路面厚度設(shè)計(jì)的依據(jù)。因此檢測(cè)既有公路路基壓實(shí)度的意義重大。瑞雷波法是一種無(wú)損探測(cè)既有高速公路路基壓實(shí)度較理想而又不夠成熟的方法。因此要對(duì)瑞雷波法探測(cè)既有公路路基壓實(shí)度的應(yīng)用技術(shù)進(jìn)行研究和改進(jìn)。本文主要內(nèi)容有：(1)對(duì)現(xiàn)有檢波器接地裝置進(jìn)行改造,通過(guò)試驗(yàn)分析,證明改造后的檢波器接地裝置完全適用于既有高速公路的檢測(cè)。(2)開(kāi)發(fā)了一種新型的瑞雷波檢測(cè)儀自動(dòng)震源,提高震源激振的效率和可控性,通過(guò)試驗(yàn)分析,證明了自動(dòng)震源的可行性,且得出自動(dòng)震源激振所得面波數(shù)據(jù)更加理想。(3)開(kāi)發(fā)了瑞雷波法快速檢測(cè)車(chē),改變了瑞雷波法傳統(tǒng)工作方式,提高了檢測(cè)的自動(dòng)化水平。通過(guò)試驗(yàn)分析,證明瑞雷波法快速檢測(cè)車(chē)比傳統(tǒng)瑞雷波法工作方式更加適合在既有高速公路上進(jìn)行探測(cè)。(4)提出了一維去噪、自動(dòng)增益調(diào)節(jié)和共振抑制的數(shù)據(jù)預(yù)處理去噪方法,提高了既有公路上采集瑞雷波數(shù)據(jù)的信噪比。(5)提出了擬合瑞雷波速與壓實(shí)度關(guān)系曲線的新方法。通過(guò)試驗(yàn)驗(yàn)證,證明新方法比傳統(tǒng)方法所得結(jié)果更加準(zhǔn)確。(6)在耒宜高速公路大修工程中采用改造后的瑞雷波法裝置以及改進(jìn)后的數(shù)據(jù)處理方法進(jìn)行了路基壓實(shí)度的探測(cè),并通過(guò)開(kāi)挖實(shí)測(cè)壓實(shí)度驗(yàn)證了瑞雷波法探測(cè)壓實(shí)度的準(zhǔn)確性,證明改造后的瑞雷波法裝置以及改進(jìn)后的探測(cè)方法在既有高速公路上探測(cè)是可行的,為既有高速公路路基狀況的評(píng)價(jià)提供了有效的依據(jù)。
[Abstract]:Subgrade is one of the important structural facilities of highway, and the compaction degree is one of the key indexes of subgrade condition. The lack of compaction degree will lead to the disease of subgrade. The modulus of resilience of subgrade can be calculated by compactness as the basis of pavement performance evaluation and pavement thickness design. Therefore, it is significant to detect the compactness of road subgrade. The Rui Leibo method It is a nondestructive method to detect the compactness of the subgrade of the expressway which is not only ideal but not mature enough. Therefore, it is necessary to study and improve the application technology of the compactness of the existing road subgrade by the Rayleigh Leibo method. The main contents of this paper are as follows: (1) the existing geophone grounding device is modified, and the test analysis has been carried out to prove the reconstructed detection. The earthing device is fully applicable to the detection of existing expressway. (2) a new automatic seismic source of Leibo detector is developed to improve the efficiency and controllability of vibration source excitation. Through experimental analysis, the feasibility of automatic source is proved, and the data of surface wave obtained from automatic source excitation are more ideal. (3) the rapid Leibo method is developed fast. The testing car has changed the traditional work mode of Leibo law and improved the automation level of the detection. Through the test and analysis, it is proved that the rapid detection vehicle of the Swiss Leibo method is more suitable for detecting the existing expressway than the traditional Leibo method. (4) the data preprocessing of one dimension denoising, automatic gain adjustment and resonance suppression is put forward. The denoising method improves the signal-to-noise ratio of the Leibo data collected from the existing highway. (5) a new method of fitting the relation curve of the Rayleigh wave velocity and the degree of compaction is proposed. Through the test, it is proved that the new method is more accurate than the traditional method. (6) the reformed Swiss Leibo method is adopted and the improved method is adopted in the large repair process of Lei Yi Expressway. The data processing method is used to detect the compaction degree of subgrade, and the accuracy of measuring compaction degree by Leibo method is verified by the measured compaction degree. It is proved that the reformed Leibo method and the improved detection method are feasible on the existing expressway, and provide the evaluation of the existing highway subgrade condition. The basis for efficiency.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U416.1

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