本文關(guān)鍵詞：全厚式車轍試驗(yàn)影響因素分析及對(duì)半剛性基層瀝青路面的車轍預(yù)估　出處：《西安建筑科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 瀝青路面 車轍 動(dòng)態(tài)模量 溫度梯度 全厚式車轍

【摘要】：近年來由于高溫天氣持續(xù)、交通量增長、超載嚴(yán)重、車輛渠化交通等因素綜合影響，瀝青路面車轍病害愈發(fā)突出，，嚴(yán)重影響行車安全和道路使用壽命。長期以來，國內(nèi)外道路研究人員對(duì)車轍問題進(jìn)行了大量研究，從純理論和試驗(yàn)方面分析車轍產(chǎn)生的成因和規(guī)律，但效果并不理想，目前我國普遍應(yīng)用標(biāo)準(zhǔn)車轍試驗(yàn)對(duì)車轍進(jìn)行預(yù)估，但與實(shí)際情況相差較大�；诖朔N情況，本文對(duì)現(xiàn)有的車轍試驗(yàn)儀器進(jìn)行改進(jìn)，使其能更好的模擬實(shí)際路面。 本文首先進(jìn)行了動(dòng)態(tài)模量試驗(yàn)，得到多個(gè)溫度和多個(gè)頻率下的瀝青混合料動(dòng)態(tài)模量試驗(yàn)結(jié)果，然后將試驗(yàn)數(shù)據(jù)進(jìn)行轉(zhuǎn)化得到能夠表征瀝青混合料粘彈性性質(zhì)的參數(shù)，然后分析標(biāo)準(zhǔn)車轍試驗(yàn)不足之處，對(duì)其進(jìn)行改進(jìn)，通過全厚式車轍試驗(yàn)改變溫度梯度、輪壓分析瀝青混合料車轍變化規(guī)律。利用有限元軟件對(duì)車轍試驗(yàn)進(jìn)行模擬計(jì)算，通過試驗(yàn)和模擬進(jìn)行對(duì)比得出有限元模擬計(jì)算的合理有效性，用有限元模擬代替部分試驗(yàn)。 對(duì)全厚式車轍試驗(yàn)進(jìn)行模擬分析，得出不同溫度梯度、不同輪壓、不同層間結(jié)合狀態(tài)以及不同厚度下車轍變形情況及剪應(yīng)力和壓應(yīng)力變化情況，利用應(yīng)力的變化規(guī)律對(duì)車轍成因進(jìn)行進(jìn)一步分析。對(duì)半剛性基層路面和柔性基層路面進(jìn)行模擬計(jì)算，計(jì)算結(jié)果與全厚式車轍試驗(yàn)進(jìn)行對(duì)比得出結(jié)論，即全厚式車轍試驗(yàn)可以較好的對(duì)半剛性基層瀝青路面進(jìn)行車轍預(yù)估，然后改變混合料的模量、層間狀態(tài)分析車轍變化情況，提出車轍預(yù)防措施。
[Abstract]:In recent years, due to the continuous high temperature weather, traffic volume growth, serious overload, vehicular traffic and other factors, the rutting disease of asphalt pavement is becoming more and more prominent. For a long time, road researchers at home and abroad have done a lot of research on rutting, and analyzed the causes and rules of rutting from pure theory and test. However, the effect is not satisfactory. At present, the standard rut test is widely used in our country to predict the rut, but it is different from the actual situation. Based on this situation, this paper improves the existing rutting test instruments. So that it can better simulate the actual road surface. In this paper, the dynamic modulus test of asphalt mixture is first carried out, and the dynamic modulus test results of asphalt mixture are obtained at several temperatures and different frequencies. Then the test data are transformed to obtain the parameters which can characterize the viscoelastic properties of asphalt mixture. Then the shortcomings of standard rutting test are analyzed and improved to change the temperature gradient through full-thickness rutting test. Wheel pressure analysis of asphalt mixture rutting change law, using finite element software to simulate the rutting test, through the comparison of the test and simulation to obtain the reasonable effectiveness of the finite element simulation calculation. The finite element simulation is used to replace the partial test. The full-thickness rutting test is simulated and analyzed, and the results show that different temperature gradient, different wheel pressure, different interlayer bonding state and different thickness of rutting deformation and shear stress and compressive stress change. The causes of rutting are further analyzed by using the law of stress variation. The results are compared with the full-thickness rutting test by simulating and calculating the semi-rigid base pavement and the flexible base pavement. That is, the full-thickness rutting test can better predict the rut of semi-rigid base asphalt pavement, and then change the modulus of mixture, analyze the rut changes between layers, and put forward the rutting prevention measures.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U416.217

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