本文選題：武深高速　切入點(diǎn)：路面結(jié)構(gòu)設(shè)計(jì)　出處：《交通運(yùn)輸部公路科學(xué)研究院》2015年碩士論文

【摘要】：本文結(jié)合武深高速仁化至新豐段A1標(biāo)段設(shè)計(jì)項(xiàng)目(以下稱“設(shè)計(jì)項(xiàng)目”),針對路面結(jié)構(gòu)的設(shè)計(jì)參數(shù)進(jìn)行研究分析。路面結(jié)構(gòu)的設(shè)計(jì)參數(shù)包括結(jié)構(gòu)參數(shù)和性能參數(shù)。結(jié)構(gòu)參數(shù)包括交通量以及交通荷載參數(shù),路面結(jié)構(gòu)溫度場參數(shù),路面結(jié)構(gòu)層材料的抗壓回彈模量以及劈裂強(qiáng)度。性能參數(shù)有:原材料技術(shù)參數(shù)、瀝青混合料水穩(wěn)定性、高溫抗車轍能力、低溫抗裂能力、抗?jié)B水性能以及抗滑性能(適應(yīng)于表面層)等。結(jié)合設(shè)計(jì)項(xiàng)目初步設(shè)計(jì)階段擬定路面結(jié)構(gòu)形式,通過調(diào)查分析和試驗(yàn)獲取以上結(jié)構(gòu)和性能設(shè)計(jì)參數(shù),同時(shí)驗(yàn)證原材料以及混合料在仁化地區(qū)的適用性,最后經(jīng)過結(jié)構(gòu)層組合功能分析以及力學(xué)計(jì)算確定路面結(jié)構(gòu)形式和各結(jié)構(gòu)層厚度。通過現(xiàn)場對仁化地區(qū)及周圍已建高速公路調(diào)查分析,獲取擬建路面結(jié)構(gòu)溫度場情況。通過對車輛交通查分析,獲取設(shè)計(jì)項(xiàng)目的交通量水平以及交通荷載情況并且確定路面結(jié)構(gòu)交通等級。通過現(xiàn)場調(diào)查,獲取設(shè)計(jì)項(xiàng)目高速公路建設(shè)原材料品質(zhì)以及材料的供應(yīng)情況。同時(shí),經(jīng)過對原材料的技術(shù)參數(shù)試驗(yàn)表明:SBS(I-D)改性瀝青動(dòng)力黏度伴隨溫度增減呈現(xiàn)指數(shù)關(guān)系的增減。為使瀝青混合料滿足仁化地區(qū)高溫、多雨、重載交通的特點(diǎn),瀝青混合料必須滿足均勻密水、高溫抗車轍、低溫抗裂和抗滑性能要求。選擇SAC和改進(jìn)型級配GAC兩種級配,分別進(jìn)行配合比設(shè)計(jì),以及高溫穩(wěn)定性、抗水損性能、低溫抗裂性,抗滑性能(表面層)和滲水性能(表面層)試驗(yàn)。鑒于GAC瀝青混合料的水穩(wěn)定性能較好,廣東地區(qū)應(yīng)用廣泛,而且較SAC瀝青混合料經(jīng)濟(jì)。因此選擇GAC級配瀝青混合料進(jìn)行下一步試驗(yàn)研究。首先,分別采用國內(nèi)輪碾試驗(yàn)和APA瀝青路面分析儀對GAC-20C瀝青混合料進(jìn)行車轍試驗(yàn)。當(dāng)使用動(dòng)穩(wěn)定作為評價(jià)抗車轍標(biāo)準(zhǔn)時(shí),兩種實(shí)驗(yàn)方法具有良好的相關(guān)性。并得到其動(dòng)穩(wěn)定度隨溫度升高,荷載增加以及瀝青動(dòng)力黏度下降,而呈現(xiàn)非線性的下降。同時(shí)總結(jié)國內(nèi)現(xiàn)有的瀝青混凝土的動(dòng)穩(wěn)定度水平,確定基于高抗車轍的瀝青混合料動(dòng)穩(wěn)定度為4500次/mm,試驗(yàn)溫度標(biāo)準(zhǔn)為65℃。選取55℃情況下浸水車轍動(dòng)穩(wěn)定度與干法車轍動(dòng)穩(wěn)定度車轍的殘余率,作為瀝青混合料抗水損的標(biāo)準(zhǔn)。同時(shí)考慮其他路用性能因素,將殘余動(dòng)穩(wěn)定度指標(biāo)選定為70%�？偨Y(jié)研究國內(nèi)構(gòu)造深度水平,以及本項(xiàng)目采用材料實(shí)現(xiàn)水平,選取瀝青混合料構(gòu)造深度為0.7mm,作為設(shè)計(jì)指標(biāo)。根據(jù)試驗(yàn)結(jié)果得到瀝青路面結(jié)構(gòu)的結(jié)構(gòu)設(shè)計(jì)參數(shù),結(jié)構(gòu)層功能要求,以及項(xiàng)目需求,確定結(jié)構(gòu)層組合以及結(jié)構(gòu)層厚度。
[Abstract]:In this paper, the design parameters of pavement structure are studied and analyzed according to the A1 segment design project of Wu-Shen Expressway from Renhua to Xinfeng Section (hereinafter referred to as "Design Project"). The design parameters of pavement structure include structural parameters and performance parameters. Structural parameters include traffic volume and traffic load parameters, Temperature field parameters of pavement structure, compressive resilience modulus and splitting strength of pavement layer materials. Performance parameters include: technical parameters of raw materials, water stability of asphalt mixture, rutting resistance at high temperature, crack resistance at low temperature, Anti-seepage water performance and skid resistance (suitable for surface layer) etc. Combined with the preliminary design phase of the design project, the pavement structure form is drawn up, and the above structural and performance design parameters are obtained through investigation, analysis and test. At the same time verify the applicability of raw materials and mixtures in Renhua area, Finally, the pavement structure form and the thickness of each structure layer are determined by the combination function analysis of the structure layer and the mechanical calculation. The investigation and analysis of the highway built in and around Renhua area are carried out on the spot. Get the temperature field of the proposed pavement structure. Through the analysis of vehicle traffic, get the traffic level and traffic load of the design project and determine the traffic grade of the pavement structure. To obtain the quality of raw materials and the supply of materials for highway construction of the design project. At the same time, The experimental results on the technical parameters of raw materials show that the dynamic viscosity of modified asphalt increases or decreases with the increase or decrease of temperature. In order to make the asphalt mixture meet the characteristics of high temperature, much rain and heavy load traffic in Renhua area, The asphalt mixture must meet the requirements of uniform water density, high temperature rutting resistance, low temperature crack resistance and skid resistance. SAC and improved gradation GAC are selected for mix ratio design, as well as high temperature stability, water loss resistance and low temperature crack resistance. Tests on skid resistance (surface layer) and water permeability (surface layer). In view of the good water stability of GAC asphalt mixture, it has been widely used in Guangdong. Moreover, it is more economical than SAC asphalt mixture. Therefore, GAC graded asphalt mixture is selected for further test and research. First of all, The domestic wheel rolling test and APA asphalt pavement analyzer were used to test the rutting of GAC-20C asphalt mixture respectively. When dynamic stability was used as the criterion to evaluate rutting resistance, The results show that the dynamic stability increases with the increase of temperature, the dynamic viscosity of asphalt decreases and the dynamic stability of asphalt concrete decreases with the increase of temperature, and the dynamic stability of asphalt concrete in China is summarized at the same time. The dynamic stability of asphalt mixture based on high rutting resistance is determined to be 4500 times / mm and the test temperature standard is 65 鈩，

本文編號：1668225