本文關(guān)鍵詞： 連續(xù)壓實度檢測儀 振動壓路機 壓實 振動加速度 MATLAB　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著高速公路建設(shè)的發(fā)展,公路建設(shè)的質(zhì)量問題也越來越引起人們的重視。壓實程度不夠是造成路面早期破壞的重要原因之一。壓實作業(yè)是使路基和路面各結(jié)構(gòu)材料獲得足夠密實度的重要環(huán)節(jié),采用行之有效的壓實度檢測方法是對其實行監(jiān)控的重要手段。本文在借鑒國內(nèi)外對壓實度檢測方法研究成果的基礎(chǔ)上,提出用隨車式壓實度實時連續(xù)檢測系統(tǒng)來測量土體的壓實度,其優(yōu)點在于方便、快捷、準(zhǔn)確的對壓實度進(jìn)行全面連續(xù)檢測,以便于進(jìn)行壓實質(zhì)量控制。通過理論分析及室內(nèi)試驗,設(shè)計了車載式壓實度檢測系統(tǒng)基本構(gòu)成;確定了傳感器、信號采集儀的選型和參數(shù)的選取,數(shù)據(jù)信號的分析和處理技術(shù)。在系統(tǒng)標(biāo)定試驗,振動臺試驗的基礎(chǔ)上,完成了車載式壓實度連續(xù)檢測系統(tǒng)。通過現(xiàn)場試驗證實了系統(tǒng)的準(zhǔn)確性及可靠性。得出的主要結(jié)論如下:①振動輪激振信號的變化反映了土體的壓實程度,通過對激振信號的分析處理來反映實際壓實度的方法正確、可行。②通過對實際激振信號的分析表明:路基土的壓實度和土的剛度正相關(guān)、和土的阻尼負(fù)相關(guān);而振動壓路機垂直振動加速度與土的剛度正相關(guān)、與土的阻尼負(fù)相關(guān)。在以上分析結(jié)果的基礎(chǔ)上建立了“振動壓路機—土體”模型及仿真分析,得到了路基土的壓實度與振動壓路機垂直振動加速度正相關(guān)的關(guān)系。③提出應(yīng)用振動壓路機垂直振動加速度傳感器、數(shù)據(jù)采集儀、計算機數(shù)據(jù)處理及分析系統(tǒng)組成的壓實度連續(xù)檢測系統(tǒng)進(jìn)行壓實度連續(xù)檢測技術(shù)。提出了加速度檢測數(shù)據(jù)的處理及分析技術(shù)。④提出用振動壓路機垂直振動加速度有效值表示壓實土體壓實度,加速度諧波比表示土體壓實度的技術(shù)及方法。得到三種級配不同、最佳含水量不同條件下的砂類土的壓實度與振動輪垂直加速度有效值之間的回歸公式和相關(guān)系數(shù),壓實度與振動輪垂直加速度、壓實度與加速度諧波比之間的回歸公式和相關(guān)系數(shù)。⑤提出不同細(xì)粒含量(hx)砂礫土的壓實度y與加速度有效值a之間的關(guān)系。
[Abstract]:With the development of highway construction, People pay more and more attention to the quality problem of highway construction. The insufficient compaction is one of the important reasons for the early destruction of pavement. Compaction is an important link to make the subgrade and pavement materials to obtain sufficient compactness. It is an important means to monitor the compaction degree by using effective compactness detection method. This paper draws lessons from the research results of compactness measurement methods at home and abroad. In this paper, a real-time continuous measurement system of compaction degree is put forward to measure the compaction degree of soil. The advantages of this system are that it is convenient, fast and accurate to measure the compaction degree in a comprehensive and continuous way. Through theoretical analysis and indoor test, the basic composition of the vehicle-borne compaction measurement system is designed, and the selection of sensor and signal collector and the selection of parameters are determined. Data signal analysis and processing techniques. Based on system calibration test, shaking table test, The accuracy and reliability of the system are verified by field tests. The main conclusions are as follows: the variation of vibration signal of the vibration wheel of 1 / 1 reflects the compaction degree of soil. The method to reflect the actual compaction degree is correct through the analysis and processing of the exciting signal. The analysis of the actual exciting signal shows that the compaction degree of the subgrade soil is positively correlated with the stiffness of the soil and negatively correlated with the damping of the soil. The vertical vibration acceleration of the vibratory roller is positively correlated with the stiffness of the soil and negatively correlated with the damping of the soil. Based on the above analysis results, the "vibratory roller-soil" model and its simulation analysis are established. The positive correlation between the compaction degree of subgrade soil and the vertical vibration acceleration of vibratory roller is obtained. The compactness continuous testing system composed of computer data processing and analysis system is used to measure the compactness continuously. The processing and analyzing technology of acceleration detection data is put forward. 4. The vertical vibration acceleration of vibratory roller is put forward. The effective value represents the compaction degree of the compacted soil, The technique and method of the acceleration harmonic ratio to express the compaction degree of soil, the regression formula and the correlation coefficient between the compaction degree of sand soil and the effective value of vertical acceleration of vibration wheel under three different gradation and different optimum moisture content are obtained. The regression formula between compaction degree and vertical acceleration of vibrating wheel, compaction degree and harmonic ratio of acceleration, and correlation coefficient of 5. 5. The relationship between compaction degree y and acceleration effective value a of gravel soil with different fine grain content is put forward.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.1

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本文編號：1549319