本文選題：多孔水泥路面 + 溫度行為�。� 參考：《長(zhǎng)安大學(xué)》2016年碩士論文

【摘要】：多孔水泥混凝土路面,也稱為透水路面,在國(guó)際上,該類型路面被認(rèn)為是一種獨(dú)特的能夠有效解決重要環(huán)境問題和可持續(xù)發(fā)展的新型生態(tài)環(huán)保型路面,并得到了美國(guó)綠色建筑協(xié)會(huì)的能源與環(huán)境設(shè)計(jì)(LEED)的綠色建筑評(píng)估體系的認(rèn)可,而且得到廣泛應(yīng)用,主要用于低流量的人行道、住宅區(qū)和公園內(nèi)的道路、停車場(chǎng)、網(wǎng)球場(chǎng)以及常規(guī)的混凝土路面層、水工建筑物和隔音屏障等設(shè)施處。目前對(duì)于其研究主要集中在強(qiáng)度、抗滑、透水性以及降低噪聲等方面,對(duì)于其溫度場(chǎng)、傳熱機(jī)理以及與環(huán)境的能量傳輸行為的研究工作,有助于我們從機(jī)理上了解多孔路面的溫度行為和能量行為,具有一定的理論意義和實(shí)際價(jià)值。本文通過對(duì)多孔水泥混凝土路面的溫度變化規(guī)律、熱量傳輸量化、溫度預(yù)估模型建立以及影響因素等分析研究,為多孔水泥混凝土路面的設(shè)計(jì)以及更好的發(fā)揮其環(huán)境效益提供參考與理論基礎(chǔ)。在室外進(jìn)行面層試驗(yàn),通過分析其溫度行為以及計(jì)算其與外界的能量交換來建立能量平衡方程,利用能量平衡方程建立底面封閉狀態(tài)下的溫度預(yù)估模型。通過室內(nèi)全層位的模擬試驗(yàn),在面層溫度預(yù)估模型的基礎(chǔ)上建立全層位路面溫度預(yù)估模型,進(jìn)而利用全層位的溫度預(yù)估模型分析影響路面溫度的關(guān)鍵因素。在室內(nèi)條件下研究多孔水泥路面在水分影響下的溫度行為和能量行為。通過室內(nèi)室外的數(shù)據(jù)分析研究發(fā)現(xiàn),溫度行為方面,多孔水泥混凝土路面的溫度對(duì)外界環(huán)境的具有很強(qiáng)的敏感性,溫度變化速率較快,內(nèi)部溫度梯度呈現(xiàn)出均勻性,底部溫度明顯低于普通水泥混凝土,表面與底面差值明顯大于普通試件。能量行為方面,多孔水泥混凝土在同等天氣條件下,吸收太陽輻射能量較多,而且對(duì)近地環(huán)境熱量輸出較多。在水分作用影響條件下,多孔水泥混凝土表面溫度和對(duì)外熱輸出可以得到較大的降低,有利于其環(huán)境效益作用。太陽輻射吸收系數(shù)是路面溫度的最大影響因素,輻射率可以間接影響路面溫度,對(duì)流換熱系數(shù)的增大可以降低路面溫度,導(dǎo)熱系數(shù)影響多孔水泥混凝土的內(nèi)部溫度分布,間接影響試件表面溫度。多孔試件的孔隙特征和表面特征是其溫度行為和能量行為與普通試件不同的最根本影響因素。
[Abstract]:Porous cement concrete pavement, also known as permeable pavement, is considered to be a new type of eco-environmental pavement which can effectively solve important environmental problems and sustainable development in the world. And has been approved by the Green Building Association of America's Energy and Environmental Design (LEED) green building assessment system, and has been widely used in low-flow sidewalks, roads in residential areas and parks, parking lots, Tennis courts and conventional concrete pavement, hydraulic structures and noise barriers and other facilities. At present, the research focuses on the strength, anti-skid, water permeability and noise reduction, as well as the research work on the temperature field, heat transfer mechanism and energy transfer behavior with the environment. It is helpful for us to understand the temperature behavior and energy behavior of porous pavement theoretically and practically. In this paper, the temperature variation law, heat transfer quantification, temperature prediction model and influencing factors of porous cement concrete pavement are analyzed and studied. It provides a reference and theoretical basis for the design of porous cement concrete pavement and better exertion of its environmental benefits. By analyzing the temperature behavior and calculating the energy exchange with the outside world, the energy balance equation is established, and the temperature prediction model under the closed state of the bottom surface is established by using the energy balance equation. Based on the surface layer temperature prediction model, a full-layer pavement temperature prediction model is established through the indoor full-layer simulation test, and then the key factors affecting the pavement temperature are analyzed by using the full-layer temperature prediction model. The temperature and energy behaviors of porous cement pavement under the influence of water were studied under indoor conditions. Through the analysis of indoor and outdoor data, it is found that the temperature of porous cement concrete pavement is highly sensitive to the external environment, the temperature change rate is faster, and the internal temperature gradient is uniform. The bottom temperature is obviously lower than the ordinary cement concrete, and the difference between the surface and the bottom surface is obviously higher than that of the ordinary specimen. In terms of energy behavior, porous cement concrete absorbs more solar radiation energy under the same weather conditions, and outputs more heat to near-Earth environment. Under the influence of water content, the surface temperature and external heat output of porous cement concrete can be greatly reduced, which is beneficial to its environmental benefit. The solar radiation absorption coefficient is the biggest influence factor of pavement temperature, the radiation rate can indirectly affect the pavement temperature, the increase of convection heat transfer coefficient can reduce the pavement temperature, and the thermal conductivity can affect the internal temperature distribution of porous cement concrete. The surface temperature of the specimen is indirectly affected. The pore and surface characteristics of porous specimens are the most fundamental factors affecting their temperature behavior and energy behavior.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U416.216

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