本文關(guān)鍵詞： ATB-30 級(jí)配設(shè)計(jì) 壓實(shí)特性 疲勞特性 壽命預(yù)估　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著公路建設(shè)的快速發(fā)展,針對(duì)當(dāng)前我國已建成的高速公路承擔(dān)著小型車輛逐年增多、大型車輛軸載重、交通量大等特點(diǎn),用密級(jí)配瀝青穩(wěn)定碎石混合料鋪筑而成的路面相對(duì)于傳統(tǒng)的半剛性材料有著溫度穩(wěn)定性好、耐久性強(qiáng)和抗疲勞性能優(yōu)等特點(diǎn),能更好適應(yīng)當(dāng)前我國高速公路的建設(shè)步伐。設(shè)計(jì)良好的密級(jí)配瀝青穩(wěn)定碎石混合料不僅可以具有較高的抗疲勞特性與抗彎拉強(qiáng)度,而且具有較高的強(qiáng)度與耐久性,同時(shí)用于鋪筑路面結(jié)構(gòu)可以緩解瀝青路面的反射裂縫、水損害等破壞,延長(zhǎng)了瀝青路面使用壽命,對(duì)提高瀝青路面的使用品質(zhì)具有重要的現(xiàn)實(shí)意義和經(jīng)濟(jì)效益,本文通過分析國內(nèi)外瀝青穩(wěn)定碎石混合料發(fā)展現(xiàn)狀,選取貝雷法設(shè)計(jì)0.9?0.6四種不同CA比級(jí)配的ATB-30,再通過SGC旋轉(zhuǎn)壓實(shí)成型試件。為了實(shí)現(xiàn)在施工中易于壓實(shí)以達(dá)到節(jié)能減排的目的,并在運(yùn)營時(shí)具有良好的使用性能,本文通過密實(shí)曲線斜率和能量指數(shù)來分析壓實(shí)特性,得出當(dāng)CA=0.82時(shí)施工時(shí)易于壓實(shí),開放交通后不易產(chǎn)生追密變形。通過室內(nèi)小梁彎曲疲勞試驗(yàn),應(yīng)用Weibull概率分布,建立并分析不同可靠度下的P~S~N和P~?~N疲勞預(yù)估等效方程,以比對(duì)不同級(jí)配的ATB-30疲勞特性,得出CA比較大的級(jí)配具有較高的抗疲勞特性。因此,本文選定CA=0.82作為最佳設(shè)計(jì)級(jí)配,并從實(shí)際路面荷載間歇時(shí)間、裂縫擴(kuò)展和氣候條件等影響因素,選取合適的系數(shù)來修正室內(nèi)疲勞試驗(yàn),對(duì)疲勞壽命進(jìn)行預(yù)估計(jì)算,為路面設(shè)計(jì)和材料選擇提供參考。
[Abstract]:With the rapid development of highway construction, according to the characteristics of the highway built in our country, the number of small vehicles is increasing year by year, the axle load of large vehicles is heavy, the traffic volume is large, and so on. Compared with the traditional semi-rigid materials, the pavement paved with asphalt stabilized macadam with dense gradation has the characteristics of good temperature stability, strong durability and excellent fatigue resistance. The compacted asphalt stabilized macadam mixture can not only have high fatigue resistance and flexural tensile strength, but also have high strength and durability. At the same time, it can alleviate the damage of reflection crack and water damage of asphalt pavement, prolong the service life of asphalt pavement, and have important practical significance and economic benefit to improve the use quality of asphalt pavement. Based on the analysis of the development situation of asphalt stabilized macadam mixture at home and abroad, this paper selects the Bailey method to design 0.9? In order to achieve the purpose of energy saving and emission reduction in construction, ATB-30 with four different CA ratios is formed by SGC rotary compaction, and it has good performance in operation. In this paper, compaction characteristics are analyzed by slope of compaction curve and energy index. It is concluded that compaction is easy when CA=0.82 is in construction and it is not easy to produce compaction deformation after opening traffic. Through indoor trabecular bending fatigue test, the probability distribution of Weibull is applied. In this paper, we establish and analyze the different reliability of Pu Sn and Pu? In order to compare the fatigue characteristics of ATB-30 with different gradation, it is concluded that the larger CA gradation has higher fatigue resistance. Therefore, CA=0.82 is chosen as the best design grade, and the actual load interval time of pavement is analyzed. The influence factors such as crack propagation and climate conditions are selected to modify the indoor fatigue test and the fatigue life is estimated and calculated to provide a reference for pavement design and material selection.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U414

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