【摘要】：瀝青路面暴露在外界環(huán)境中，受自然環(huán)境持續(xù)影響，致使路面結(jié)構(gòu)內(nèi)溫度不斷變化，由于瀝青路面力學(xué)、路用性能和路面本身溫度密切相關(guān)，，若能準(zhǔn)確預(yù)估瀝青路面溫度場(chǎng)溫度分布情況，即可有效預(yù)防路面早期破壞，提高路面使用質(zhì)量，又利于瀝青路面結(jié)構(gòu)設(shè)計(jì)的科學(xué)性。正因如此，對(duì)于瀝青路面結(jié)構(gòu)內(nèi)溫度分布研究分析具有重要的應(yīng)用價(jià)值。 本文從瀝青路面溫度受氣象要素影響出發(fā)，通過熱傳導(dǎo)基本理論，建立瀝青路面溫度預(yù)估模型；結(jié)合贛中地區(qū)氣象數(shù)據(jù)，預(yù)估瀝青路面溫度分布狀況，繪制出贛中地區(qū)瀝青路面溫度分布和溫度沿結(jié)構(gòu)變化規(guī)律。具體研究成果如下： ①對(duì)贛中地區(qū)1971~2000年30年氣象數(shù)據(jù)統(tǒng)計(jì)分析，得出氣溫、太陽輻射、月平均風(fēng)速、日照時(shí)間、降雨量等氣象要素的年、日變化規(guī)律及相應(yīng)的計(jì)算公式；對(duì)路面材料熱物理參數(shù)分析研究，確定了不同熱物理參數(shù)的較小的取值范圍； ②利用氣象、傳熱學(xué)基本理論、有限差分法，建立瀝青路面結(jié)構(gòu)內(nèi)溫度一維非穩(wěn)態(tài)數(shù)值模型；并利用MATLAB語言進(jìn)行編程，得到可視化的溫度預(yù)估模型；通過與瀝青路面不同深度、不同時(shí)刻溫度實(shí)測(cè)值對(duì)比分析，可知模型可準(zhǔn)確預(yù)估路面溫度分布狀況； ③結(jié)合贛中地區(qū)氣象要素?cái)?shù)據(jù)，利用溫度預(yù)估模型計(jì)算得到瀝青路面各層溫度，以瀝青路面1cm處的溫度分布數(shù)據(jù)，繪制出贛中地區(qū)瀝青路面溫度分布圖；同時(shí)利用模型計(jì)算得到高溫時(shí)、常溫時(shí)、陰天時(shí)一天內(nèi)不同時(shí)刻瀝青路面溫度沿深度分布情況，對(duì)一年內(nèi)路面各層溫度的計(jì)算統(tǒng)計(jì)，繪制出年瀝青路面溫度沿深度分布圖； ④對(duì)不同數(shù)值的路面材料熱物理參數(shù)、不同取值的路表輻射吸收率以及降雨對(duì)瀝青路面溫度分布影響進(jìn)行研究分析。 本文對(duì)瀝青路面溫度分布的研究成果對(duì)以后類似路面結(jié)構(gòu)實(shí)驗(yàn)、開發(fā)，提供了新思路和有效的基礎(chǔ)數(shù)據(jù)。
[Abstract]:The asphalt pavement is exposed to the external environment, which is affected by the natural environment, resulting in the constant change in the temperature of the pavement structure. Because of the asphalt pavement mechanics, the road performance is closely related to the temperature of the pavement itself. If the temperature distribution of the asphalt pavement temperature field can be estimated accurately, the early damage of the pavement can be prevented and the quality of the pavement is improved. It is beneficial to the scientific design of asphalt pavement structure, which is of great application value to the research and analysis of temperature distribution in asphalt pavement structure.
Based on the influence of meteorological factors on the temperature of asphalt pavement, the temperature prediction model of asphalt pavement is established through the basic theory of heat conduction. The temperature distribution of asphalt pavement is estimated with the meteorological data in central Jiangxi Province, and the temperature distribution and temperature along the structure of the asphalt pavement in the middle Jiangxi area are drawn. The concrete research results are as follows:
On the basis of the statistical analysis of meteorological data in the 30 years of 1971~2000 in central Jiangxi Province, the annual, diurnal variation and corresponding calculation formulas of weather factors such as temperature, solar radiation, monthly mean wind speed, sunshine time and rainfall are obtained, and the thermal physical parameters of pavement materials are analyzed and studied, and the smaller range of different thermal physical parameters is determined.
Secondly, using the basic theory of Meteorology and heat transfer, the finite difference method, a one-dimensional unsteady numerical model of the temperature in the asphalt pavement structure is set up, and a visual temperature prediction model is obtained by programming the MATLAB language. The model can predict the pavement accurately by comparing the different depths of the asphalt pavement and the temperature measurement at different time. Temperature distribution;
(3) combining the meteorological elements data of the central Jiangxi area, the temperature of each layer of asphalt pavement is calculated by the temperature prediction model. The temperature distribution map of the asphalt pavement in the Middle Jiangxi area is drawn by the temperature distribution data at 1cm of the asphalt pavement. At the same time, the temperature of the asphalt pavement at different times in one day in a day at high temperature is calculated by the model and the temperature along the asphalt pavement at different times in one day is deep. The distribution of temperature of each layer in a year is calculated, and the distribution map of the temperature along the depth of the asphalt pavement is drawn out.
4. The thermal physical parameters of different pavement materials, the radiation absorptivity of different values of road surface and the influence of rainfall on the temperature distribution of asphalt pavement are studied.
The research results of asphalt pavement temperature distribution provide new ideas and effective basic data for similar pavement structure experiment and development.
【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】：2014
【分類號(hào)】：U416.217

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李迎;張煒;王智宇;李福斌;;突然降溫對(duì)瀝青路面溫度梯度分布影響計(jì)算[J];北方交通;2009年10期

本文編號(hào)：2150674