本文選題：長大上坡　切入點：縱坡　出處：《長安大學》2014年博士論文　論文類型：學位論文

【摘要】：交通荷載作用于長大上坡路段瀝青路面的狀況與平坡路段相比，其對瀝青路面的作用時間變長，在重載、高溫的綜合作用下，長大上坡段瀝青路面的車轍變形發(fā)展、形成速度更快。系統(tǒng)開展長大上坡路段瀝青路面抗車轍技術研究，對有效控制和解決長大上坡路段瀝青路面的車轍問題是非常必要的。 本文通過實地調查分析了長大上坡路段瀝青路面的車轍病害、路面結構內溫度分布狀況、重載貨車運行速度變化狀況，結果表明：（1）車轍、推移病害是長大上坡路段瀝青路面的主要病害類型，在夏季高溫、重載、低速車輛荷載綜合作用下，可能在夏季溫度最高的一周或兩周內快速形成車轍，通常連續(xù)上坡一側的車轍深度是其他路段的2～3倍；（2）長大上坡路段瀝青路面車轍變形主要發(fā)生在中面層，其次是表面層、下面層；（3）瀝青路面結構內的最高溫度超過了60℃。（4）在較長的長大上坡路段，重載貨車速度在下降后一直維持在20～30Km/h直至坡頂。以此為基礎，提出了以滿載貨車車速作為定義長大上坡路段的指標。 利用有限元數(shù)值計算法，分析了高溫、坡度（水平分力）、車速、重載對長大上坡路段瀝青路面應力的影響，結果表明：隨著車速的降低，瀝青路面應力有較大增長，坡度雖對長大上坡路段瀝青路面受力狀況的影響較小，但會導致重載車輛車速降低從而產生車轍變形。 采用可變速荷載輪新型車轍儀模擬了重載車輛速度變化對瀝青路面車轍的影響，不同輪速、溫度、荷載條件下的車轍試驗結果表明：在重載、高溫、低速荷載條件下，以標準車轍試驗條件設計的瀝青混合料容易形成車轍，采用現(xiàn)行技術規(guī)范規(guī)定的60℃溫度條件評價長大上坡路段瀝青混合料高溫穩(wěn)定性不盡合理。 采用多級嵌擠密級配設計方法和Superpave方法進行瀝青混合料配合比設計，，通過漢堡車轍試驗和MMLS3加速加載試驗研究了不同瀝青（含外摻劑）、不同混合料類型在不同荷載與溫度條件下的抗車轍性能，推薦了適用于長大上坡路段的瀝青混合料類型及其技術要求。 在現(xiàn)場調查和對長大上坡路段瀝青路面受力特點分析的基礎上，明確了上、中面層是瀝青路面產生車轍變形的主要層位。在加速加載試驗驗證路面結構合理組合及厚度基礎上，提出了適用于長大上坡路段的瀝青路面結構組合。 最后，基于交通管理技術措施，提出了采用夏季高溫時段灑水降溫、設置專用爬坡車道、調整車道系數(shù)和重載車輛分時段通行等技術措施來減輕長大上坡路段瀝青路面車轍。
[Abstract]:Effect of traffic load on the continuous uphill sections of asphalt pavement condition compared with the flat slope section, the effect of asphalt pavement under heavy load, time becomes longer, the comprehensive effect of temperature under the continuous uphill sections of Asphalt Pavement Rutting development, formed faster. System to carry out research on rutting resistance of asphalt pavement in long uphill road, is very necessary to effectively control and solve the problem of continuous uphill sections rutting of asphalt pavement.
This paper analyzes the rutting of asphalt pavement on the continuous uphill sections through on-the-spot investigation, temperature distribution within the pavement, changes, heavy truck speed results showed that: (1) the rut, disease is the main disease type on the continuous uphill sections of asphalt pavement, heavy load in the summer high temperature, low speed, vehicle loads, may in the summer the highest temperature within a week or two rapid formation of rut, rut depth usually continuous uphill side is 2~3 times the other sections; (2) the continuous uphill sections of Asphalt Pavement Rutting deformation mainly occurred in the surface layer, the surface layer, bottom layer; (3) the highest temperature in asphalt pavement structure more than 60 degrees. (4) in the long growth uphill road, heavy truck speed has been maintained at 20 ~ 30Km/h in the top until after falling. On this basis, put forward to the full truck speed as The index of the long upslope section.
By using the numerical method of finite element analysis, the temperature gradient (horizontal component), speed, heavy impact on the continuous uphill sections of asphalt pavement stress results show that with lower speed, asphalt pavement stress increased, although the slope of continuous uphill sections affected asphalt pavement stress condition, but will in the heavy vehicle speed reduced to produce rutting deformation.
The variable speed wheel load model rutmeter simulated the effects of heavy vehicle speed change on the rutting of the asphalt pavement, different wheel speed, temperature and load conditions of the rutting test results show that in high temperature, heavy load, low load conditions, the asphalt mixture design standard rutting test conditions to form the rut, evaluate the existing provisions the technical specifications of 60 DEG long uphill section high temperature stability of asphalt mixture is not reasonable.
Using basiced gradation design method and Superpave method of asphalt mixture design, through the hwtd and MMLS3 accelerated loading test of different asphalt (containing additives), different mixture type anti rutting performance under different load and temperature condition, recommended asphalt mixture type and technical requirements for the continuous uphill sections.
In the field investigation and the continuous uphill sections of Asphalt Pavement Based on the analysis of the characteristic of clear, the surface layer of asphalt pavement is the main layer of rut deformation. In the accelerated loading test verify the reasonable combination of pavement structure and thickness on the basis of the asphalt pavement structure is suitable for the continuous uphill sections.
Finally, based on traffic management technology measures, we put forward technical measures to reduce rutting of asphalt pavement on long uphill road, such as sprinkling water and cooling in summer, setting up special climbing lane, adjusting Lane coefficient and passing time between heavy vehicles.

【學位授予單位】：長安大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：U416.217

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本文編號：1619439