本文關(guān)鍵詞： 水泥混凝土路面 重載交通 板角脫空 極限承載力 結(jié)構(gòu)組合　出處：《重慶交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國交通運輸行業(yè)的快速發(fā)展,道路上車輛的載重也越來越大,再加上超載現(xiàn)象普遍存在,造成了水泥混凝土路面很多使用不到3-5年就出現(xiàn)了嚴(yán)重的結(jié)構(gòu)性破壞,完全沒有達到路面的設(shè)計使用年限,而且嚴(yán)重影響路面的通行能力和行車安全。通過對水泥混凝土路面病害的調(diào)查,混凝土路面的破壞很多發(fā)生在路面的板角,板角出現(xiàn)大量的裂縫、斷裂甚至出現(xiàn)坑槽,而板角出現(xiàn)這些破壞的最原始原因是因為路面板板角出現(xiàn)了脫空。因此,本文有針對性的對重載交通混凝土路面板角應(yīng)力進行了研究。具體的研究內(nèi)容及結(jié)果為:①研究了路面板板角脫空的過程及脫空后對路面的使用壽命和疲勞壽命的影響;②研究了路面板的破壞過程,設(shè)計路面的極限承載力是在路面破壞的第二個階段確定的;③對混凝土路面板應(yīng)力分析的荷載圖式進行了詳細的講解;④分析了混凝土路面板板厚對路面應(yīng)力的影響,板厚越大,路面所受的應(yīng)力越小,混凝土板板厚可以很好的改善路面板的受力,在重載車輛、路面板板角脫空后板厚對路面所受應(yīng)力的改善越明顯;⑤分析了混凝土路面在不同車輛荷載作用下路面板所受應(yīng)力的變化規(guī)律,車輛荷載的增大將造成路面板應(yīng)力的迅速增大,尤其是路面板板角脫空后,其所受應(yīng)力增長的更快;⑥分析了水泥混凝土路面基層對路面應(yīng)力的影響,無論路面板板角脫空如否,基層對路面板所受應(yīng)力的影響都很小,通過加厚基層來改變路面板的受力是不經(jīng)濟的;⑦研究了路面板板角的溫度應(yīng)力和路面板板角在重載作用下的荷載應(yīng)力,提出了混凝土路面板板角脫空路面厚度的驗算公式;⑧將公路水泥混凝土路面設(shè)計規(guī)范對混凝土板厚度的設(shè)計與混凝土板板角脫空后的板厚度驗算公式進行了結(jié)合,提出了新的混凝土板板厚設(shè)計流程;⑨對水泥混凝土路面厚板的接縫和施工工藝進行了研究,以期為現(xiàn)在水泥混凝土路面厚板的施工有所指導(dǎo)。
[Abstract]:With the rapid development of transportation industry in our country, the load of vehicles on the road is increasing, and the phenomenon of overloading exists widely, which results in serious structural damage of cement concrete pavement in less than 3-5 years. It is completely not up to the design life of the pavement, and seriously affects the capacity of the pavement and the driving safety. Through the investigation of the cement concrete pavement diseases, many of the damage of the concrete pavement occur in the pavement slab angle. There are a lot of cracks, cracks and even potholes in the corner of the plate, and the most original reason for the damage is that the angle of the road panel is empty. In this paper, the angular stress of heavy duty traffic concrete pavement slab is studied. The concrete research contents and results are as follows: 1. The process of angular void of pavement slab and the service life and fatigue life of pavement after void removal are studied. The failure process of the pavement slab is studied. The ultimate bearing capacity of design pavement is determined in the second stage of pavement failure. The load pattern of stress analysis of concrete pavement slab is explained in detail. 4. The influence of concrete slab thickness on pavement stress is analyzed. The smaller the stress on the pavement, the thicker the concrete slabs, the better the load on the pavement slabs can be, in heavy-duty vehicles, The more obvious the improvement of the stress on the pavement by the thickness of the slab after the angle of the road slab is removed, the more obvious is the change of the stress of the concrete pavement under the action of different vehicle loads. The increase of the vehicle load will result in the rapid increase of the stress of the pavement slab. Especially, after the angle of the pavement slab is emptied, the stress increases more rapidly. The influence of the cement concrete pavement base on the pavement stress is analyzed. No matter if the angle of the road slab is empty, the effect of the base on the stress of the road slab is very small. It is not economical to change the force of the road slab by thickening the base. The thermal stress of the angle of the road slab and the load stress of the angle of the road slab under heavy load are studied. In this paper, a formula for calculating the thickness of concrete pavement with angle voids is put forward. The design of concrete slab thickness is combined by the design code of highway cement concrete pavement and the formula of the thickness of concrete slab after the angle of concrete slab is emptied. A new design process of concrete slab thickness is put forward. The joint and construction technology of thick slab of cement concrete pavement are studied in order to guide the construction of thick slab of cement concrete pavement.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.216

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相關(guān)碩士學(xué)位論文 前1條

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本文編號：1534090