【摘要】：為了減少半剛性基層瀝青路面反射裂縫,近年來(lái)國(guó)內(nèi)一些省份在公路建設(shè)中開始使用柔性基層,由于瀝青價(jià)格較高,柔性基層瀝青路面建設(shè)費(fèi)用與半剛性基層路面相比大幅上揚(yáng),且國(guó)內(nèi)對(duì)于柔性基層瀝青路面車轍問題研究不足,缺乏科學(xué)的技術(shù)規(guī)范。因此,柔性聯(lián)結(jié)層和半剛性基層相結(jié)合的結(jié)構(gòu)形式成為目前較為常見的結(jié)構(gòu)組合型式。其上層為瀝青穩(wěn)定碎石柔性層、下層為半剛性基層,既具有半剛性基層強(qiáng)度高、承載能力大的優(yōu)點(diǎn),又可以發(fā)揮柔性層良好的抗變形和抗開裂能力,同時(shí)也降低了路面建設(shè)費(fèi)用。我國(guó)對(duì)于瀝青穩(wěn)定碎石結(jié)構(gòu)層的設(shè)計(jì)施工等方面的研究尚處于起步階段,缺乏科學(xué)的技術(shù)標(biāo)準(zhǔn)和設(shè)計(jì)指南,相關(guān)研究中提出的設(shè)計(jì)指標(biāo)及參數(shù)多針對(duì)工程所在地實(shí)際情況,適用性受到限制。目前對(duì)于瀝青穩(wěn)定碎石結(jié)構(gòu)層的力學(xué)計(jì)算分析多采用傳統(tǒng)層狀體系理論,缺乏對(duì)大粒徑混合料細(xì)觀力學(xué)行為的研究。針對(duì)以上問題,本文以河南省濟(jì)源至焦作高速公路路面工程為依托,對(duì)ATB-30瀝青穩(wěn)定碎石在下面層中的應(yīng)用進(jìn)行深入研究。分析馬歇爾設(shè)計(jì)方法存在的局限性,確定ATB-30下面層的配合比設(shè)計(jì)方法,結(jié)合依托工程具體情況選擇ATB-30混合料原材料,并進(jìn)行配合比組成設(shè)計(jì),確定ATB-30瀝青穩(wěn)定碎石混合料生產(chǎn)配合比,并對(duì)其路用性能進(jìn)行檢測(cè)。利用離散元方法(PFC2D)生成二維ATB-30下面層細(xì)觀模型,在施加標(biāo)準(zhǔn)軸載作用下,追蹤荷載作用位置處的接觸力、顆粒位移。構(gòu)建4cmAC-13上面層+6cmAC-20中面層+10cmATB-30下面層的路面結(jié)構(gòu),追蹤施加標(biāo)準(zhǔn)軸載后路面結(jié)構(gòu)的細(xì)觀響應(yīng),從細(xì)觀角度闡釋顆粒間的相互作用以及各層路面結(jié)構(gòu)承受荷載作用的機(jī)理。確定不同階段ATB-30瀝青穩(wěn)定碎石混合料施工溫度控制范圍,提出了ATB-30瀝青穩(wěn)定碎石混合料的施工工藝及施工質(zhì)量控制措施,為ATB-30瀝青穩(wěn)定碎石混合料的施工應(yīng)用提供參考依據(jù)。
[Abstract]:In order to reduce the reflection crack of asphalt pavement with semi-rigid base, in recent years, some provinces in China began to use flexible base in highway construction, because of the high price of asphalt, Compared with semi-rigid base asphalt pavement, the construction cost of flexible base asphalt pavement is much higher, and the domestic research on rutting problem of flexible base asphalt pavement is insufficient, and lack of scientific technical specification. Therefore, the combination of flexible connecting layer and semi-rigid base is the most common structural combination at present. The upper layer is a flexible layer of asphalt stabilized macadam and the lower layer is a semi-rigid base. It not only has the advantages of high strength and large bearing capacity of semi-rigid base, but also can give play to the good anti-deformation and anti-cracking ability of the flexible layer. At the same time, it also reduces the cost of pavement construction. The research on the design and construction of asphalt stabilized macadam structure layer in our country is still in its infancy, lacking of scientific technical standard and design guide, and the design indexes and parameters put forward in the relevant research are mostly aimed at the actual situation of the project location. Applicability is limited. At present, the traditional theory of layered system is used to calculate and analyze the mechanics of asphalt stabilized macadam structure layer, and the research on the meso-mechanical behavior of large-size mixture is lacking. Based on the pavement engineering of Jiyuan-Jiaozuo Expressway in Henan Province, the application of ATB-30 asphalt stabilized macadam in the lower layer is studied in this paper. This paper analyzes the limitations of Marshall design method, determines the mix ratio design method of ATB-30 lower layer, selects the raw materials of ATB-30 mixture according to the specific conditions of engineering, and designs the composition of mix ratio. The mixture ratio of ATB-30 asphalt stabilized macadam mixture was determined and its road performance was tested. Discrete element method (PFC2D) is used to generate a two-dimensional ATB-30 mesoscopic model. The contact force and particle displacement at the position of the load are traced under the action of the standard axial load. The pavement structure of the 6cmAC-20 middle surface layer of 4cmAC-13 is constructed, and the micro-response of the pavement structure under the standard axle load is followed up. The interaction between particles and the mechanism of different pavement structures subjected to load are explained from the view of meso. The construction temperature control range of ATB-30 asphalt stabilized macadam mixture at different stages is determined, and the construction technology and construction quality control measures of ATB-30 asphalt stabilized macadam mixture are put forward. It provides a reference for the construction application of ATB-30 asphalt stabilized macadam mixture.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U416.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 張全庚,賈渝;對(duì)我國(guó)當(dāng)前瀝青路面技術(shù)標(biāo)準(zhǔn)的若干看法[J];華東公路;1999年04期

2 郝培文,徐金枝,周懷治;應(yīng)用貝雷法進(jìn)行級(jí)配組成設(shè)計(jì)的關(guān)鍵技術(shù)[J];長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年06期

相關(guān)碩士學(xué)位論文 前1條

1 常明豐;多孔瀝青路面微觀力學(xué)特性與空隙衰變行為研究[D];長(zhǎng)安大學(xué);2009年

，

本文編號(hào)：2416060