發(fā)布時(shí)間：2018-06-08 13:47

  本文選題：溫縮系數(shù) + 干縮系數(shù)�。� 參考：《哈爾濱工業(yè)大學(xué)》2016年碩士論文

【摘要】：調(diào)查表明,橫向裂縫已成為半剛性瀝青路面最主要的病害之一。目前從材料特性角度提高路面抗裂性能的研究較多,包括提高瀝青混合料低溫性能、提高半剛性基層材料抗收縮性能等,但從優(yōu)化結(jié)構(gòu)組合角度提高瀝青路面抗裂性能的研究還很少。因此,文章在分析吉林省典型路面結(jié)構(gòu)形式的基礎(chǔ)上,測定基層與面層單體材料的收縮系數(shù)以及不同結(jié)構(gòu)組合試件的溫縮系數(shù),并提出不同結(jié)構(gòu)組合試件的理論溫縮系數(shù)公式。進(jìn)而考慮瀝青面層與基層之間的相互制約關(guān)系,給出了不同結(jié)構(gòu)組合的橫向溫縮裂縫間距計(jì)算方法,并分析各個(gè)相關(guān)因素對結(jié)構(gòu)組合橫向溫縮裂縫間距的影響,最終提出控制橫向裂縫間距的措施,給出吉林省地區(qū)適宜的路面結(jié)構(gòu)組合形式。主要研究內(nèi)容如下:首先,分析了瀝青路面的橫向開裂機(jī)理,并結(jié)合吉林省路面的典型結(jié)構(gòu)形式及橫向開裂情況確定了試驗(yàn)的材料類型及級配設(shè)計(jì)。接著在前人試驗(yàn)方法研究的基礎(chǔ)上設(shè)計(jì)出簡易可靠的溫縮系數(shù)及干縮系數(shù)試驗(yàn)方法,測定了面層的溫縮系數(shù)與基層的溫縮系數(shù)、干縮系數(shù),并分析各個(gè)相關(guān)因素變化對試件溫縮系數(shù)、干縮系數(shù)的影響。其次,根據(jù)面層及基層單體試件的溫縮系數(shù)試驗(yàn)結(jié)果,選取6種典型的面層與基層組合試件,分別測定它們各代表厚度處的溫縮系數(shù),并和理論分析得出的溫縮系數(shù)進(jìn)行對比分析,進(jìn)而驗(yàn)證組合試件理論溫縮系數(shù)公式的準(zhǔn)確性。最后,建立面層與基層組合結(jié)構(gòu)收縮變形分析的相關(guān)模型,綜合考慮溫縮和干縮作用,推導(dǎo)出組合結(jié)構(gòu)的面層和基層橫向裂縫間距公式。接著分析了各相關(guān)因素變化對路面橫向裂縫間距的影響,并提出控制路面橫向開裂的一系列措施。最終,對比分析不同結(jié)構(gòu)組合的平均裂縫間距,給出吉林省適宜的結(jié)構(gòu)組合形式。
[Abstract]:The investigation shows that the transverse crack has become one of the most important diseases of semi-rigid asphalt pavement. At present, there are many researches on improving pavement crack resistance from the point of view of material characteristics, including improving the low temperature performance of asphalt mixture, improving the shrinkage resistance of semi-rigid base materials, etc. However, there is little research on how to improve the crack resistance of asphalt pavement from the angle of optimizing structure combination. Therefore, based on the analysis of typical pavement structure in Jilin Province, the shrinkage coefficient of single base and surface material and the temperature shrinkage coefficient of different structural combination specimens are measured, and the theoretical formula of temperature shrinkage coefficient of different structural composite specimens is put forward. Then considering the mutual restriction relationship between asphalt surface and base, the calculation method of transverse temperature shrinkage crack spacing of different structure combination is given, and the influence of each relevant factor on the transverse temperature shrinkage crack spacing of structure combination is analyzed. Finally, the measures to control the transverse crack spacing are put forward, and the suitable pavement structure combination form in Jilin Province is given. The main research contents are as follows: firstly, the transverse cracking mechanism of asphalt pavement is analyzed, and combined with the typical structure and transverse cracking of Jilin Province pavement, the material types and gradation design of the test are determined. Then a simple and reliable test method of temperature shrinkage coefficient and dry shrinkage coefficient is designed on the basis of the previous experimental methods. The temperature shrinkage coefficient of the surface layer and the temperature shrinkage coefficient of the base layer and the dry shrinkage coefficient are measured. The influence of each related factor on the temperature shrinkage coefficient and dry shrinkage coefficient of the specimen was analyzed. Secondly, according to the test results of the temperature shrinkage coefficient of the surface layer and the basic unit specimen, the temperature shrinkage coefficient of each representative thickness of the six kinds of typical surface layer and the base layer composite specimen is measured respectively. By comparing with the temperature shrinkage coefficient obtained by theoretical analysis, the accuracy of the theoretical formula of temperature shrinkage coefficient of the combined specimen is verified. Finally, a model is established for the analysis of shrinkage and deformation of the composite structure of the surface and the base, and the formula of transverse crack spacing between the surface and the base of the composite structure is derived by considering the effects of temperature shrinkage and dry shrinkage. Then, the influence of relative factors on the pavement transverse crack spacing is analyzed, and a series of measures to control the pavement transverse crack are put forward. Finally, the average crack spacing of different structural combinations is analyzed, and the suitable structure combination form in Jilin Province is given.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U416.217

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