本文選題：級配碎石　切入點：級配　出處：《長沙理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：半剛性基層容易產(chǎn)生干縮和溫縮裂縫,容易引起瀝青面層的反射裂縫,并且半剛性基層材料致密,很難透水,容易造成高速公路早期病害的發(fā)生。隨著級配碎石基層具有良好的排水及消除反射裂縫功能和優(yōu)良的經(jīng)濟性被人們認識后,含級配碎石柔性基層柔性路面結(jié)構(gòu)將成為我國未來高等級公路路面結(jié)構(gòu)多樣化發(fā)展的重要結(jié)構(gòu)之一,基于上述背景,論文就級配碎石級配的設(shè)計方法及其路用性能進行了研究。本文首先對廣西地區(qū)的級配碎石基層的級配范圍進行研究。結(jié)合室內(nèi)CBR試驗、重復(fù)加載試驗和級配碎石車轍試驗和實體工程的應(yīng)用情況,綜合多種級配考慮,建議以室內(nèi)車轍試驗的1h動穩(wěn)定度和2h變形量兩個指標為參考,作為廣西高溫多雨山區(qū)高速公路級配碎石基層抗車轍性能評價標準。推薦了適合廣西地區(qū)級配碎石基層的級配范圍。然后結(jié)合彈性層狀體系理論,用BISAR3.0軟件對河都高速公路四種不同瀝青路面結(jié)構(gòu)在不同月份的應(yīng)力進行了對比分析。根據(jù)已建的力學(xué)分析模型,分析了標準軸載下不同月份不同結(jié)構(gòu)層的層底拉應(yīng)力,以及不同月份的瀝青層層底最大拉應(yīng)力和半剛性層底最大拉應(yīng)力的變化情況。最后對高速公路級配碎石基層的施工工藝進行了系統(tǒng)的總結(jié),提出適合廣西地區(qū)高速公路級配碎石基層的施工質(zhì)量控制指標,在實際工程中應(yīng)用取得了良好的效果。
[Abstract]:It is easy to produce dry shrinkage and temperature shrinkage cracks in semi-rigid base, and it is easy to cause reflective cracks in asphalt surface, and the semi-rigid base material is dense, so it is difficult to permeate water. It is easy to cause the occurrence of the early disease of expressway. With the recognition of the good drainage function of graded crushed stone base and the function of eliminating reflection crack and excellent economy, The flexible pavement structure of flexible base with graded crushed stone will become one of the important structures for the diversification of highway pavement structure in the future. In this paper, the design method and road performance of graded crushed stone are studied. Firstly, the gradation range of graded crushed stone base in Guangxi is studied. Combined with indoor CBR test, The application of repeated loading test, rutting test of graded crushed stone and solid engineering, synthesizing various gradation considerations, suggests that the two indexes of 1h dynamic stability and 2h deformation of indoor rutting test should be taken as reference. As the evaluation standard of rutting resistance of graded crushed stone base in high temperature and multi-rain mountain area of Guangxi, the grading range suitable for Guangxi regional graded crushed stone base is recommended, and then combined with the theory of elastic layered system, The stress of four kinds of different asphalt pavement structures in different months of Hedu Expressway is analyzed by BISAR3.0 software. Based on the established mechanical analysis model, the tensile stress of different layers in different months under standard axial load is analyzed. And the variation of maximum tensile stress and maximum tensile stress of asphalt layer bottom and semi-rigid layer bottom in different months. Finally, the construction technology of highway graded crushed stone base is systematically summarized. The construction quality control index suitable for highway graded crushed stone base in Guangxi area is put forward, and good results are obtained in practical engineering.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.217

【參考文獻】

相關(guān)碩士學(xué)位論文 前1條

1 柳音;級配碎石柔性基層性能試驗研究[D];重慶交通大學(xué);2008年

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本文編號：1567676