【摘要】：隨著我國(guó)公路事業(yè)的高速發(fā)展,涵洞在公路中的作用也越來(lái)越明顯。鋼波紋管涵洞作為公路涵洞的基本類型之一,因?yàn)槠淙嵝越Y(jié)構(gòu)、適應(yīng)變形的特性使其在涵洞中占有的比例也越來(lái)越大,這一現(xiàn)象在特殊地質(zhì)地區(qū)表現(xiàn)的更為明顯。本文針對(duì)低路堤重載交通下鋼波紋管涵洞力學(xué)性能及其與路基變形協(xié)調(diào)性展開(kāi)研究。結(jié)合實(shí)際工程項(xiàng)目,通過(guò)現(xiàn)場(chǎng)試驗(yàn)及數(shù)值模擬的方法對(duì)鋼波紋管涵洞在低路堤重載交通下的變形及受力特性、以及與路基變形的協(xié)調(diào)性能進(jìn)行分析,主要做了以下工作:①結(jié)合國(guó)內(nèi)外對(duì)鋼波紋管涵洞的研究現(xiàn)狀,給出了鋼波紋涵洞材料的力學(xué)性能及工程特性,給出鋼波紋管涵洞的使用條件及其適用性。②根據(jù)一處直徑3米、填土高度2.6米的鋼波紋管涵洞的現(xiàn)場(chǎng)試驗(yàn),得出鋼波紋管涵洞切向應(yīng)變、管周切向應(yīng)變現(xiàn)場(chǎng)試驗(yàn)數(shù)據(jù)。分析數(shù)據(jù)得出:當(dāng)車輛位于不同車道時(shí),波紋管切向應(yīng)變隨著應(yīng)變片位置的變化而不同,但其隨荷載移動(dòng)的變化趨勢(shì)卻存在相似性。當(dāng)荷載作用于不同車道時(shí),鋼波紋管切向應(yīng)變不同,隨著荷載的移動(dòng),波紋管不同斷面同一角度的切向應(yīng)變值不同但變化規(guī)律相似。③結(jié)合現(xiàn)場(chǎng)試驗(yàn)情況,通過(guò)數(shù)值模擬方法得出確定工況條件下鋼波紋管涵洞管頂和管底波峰及波谷處(包括切向和軸向)受力特征、沿管涵圓周切向應(yīng)力分布規(guī)律。④確定工況條件下,分析管涵豎向位移及路基豎向位移變化規(guī)律,進(jìn)一步分析低路堤重載交通下鋼波紋管涵洞與路基的變形協(xié)同性。論文研究成果給出了鋼波紋管涵洞在低路堤重載交通下的力學(xué)性能,主要包括應(yīng)變及應(yīng)力情況,研究了鋼波紋管涵洞與路基的變形協(xié)同性,具有重要的理論和應(yīng)用價(jià)值。
[Abstract]:With the rapid development of highway industry in China, the role of culvert in highway is becoming more and more obvious. Steel corrugated pipe culvert is one of the basic types of highway culvert. Because of its flexible structure and the characteristic of adapting to deformation, it occupies more and more proportion in culvert, which is more obvious in special geological area. In this paper, the mechanical properties of steel corrugated culvert and its compatibility with roadbed deformation under heavy load traffic of low embankment are studied. Combined with actual engineering projects, the deformation and mechanical characteristics of steel bellows culvert under heavy load traffic of low embankment are analyzed by field test and numerical simulation, and the compatibility with subgrade deformation is also analyzed. The following work has been done: 1. The mechanical properties and engineering properties of steel corrugated culvert materials have been given according to the current research situation of steel corrugated pipe culverts at home and abroad. The application conditions and applicability of steel corrugated culvert .2 according to the field test of a steel corrugated pipe culvert with diameter of 3 meters and filling height of 2.6 meters, the field test data of tangential strain and circumferential tangential strain of steel corrugated pipe culvert are obtained. The results show that the tangential strain of bellows varies with the position of strain gauge when the vehicle is located in different lanes, but the trend of variation with load is similar. When the load acts on different lanes, the tangential strain of steel bellows is different. With the load moving, the tangential strain values of the corrugated tubes at the same angle of different sections are different, but the variation law is similar. 3. Through the numerical simulation method, the stress characteristics of the top and bottom wave peaks and troughs of steel corrugated culvert under certain working conditions (including tangential and axial directions) are obtained, and the distribution of tangential stress along the circumferential direction of pipe culvert is determined under certain working conditions. The variation law of vertical displacement of pipe culvert and subgrade is analyzed, and the synergism of deformation between steel corrugated culvert and subgrade under heavy load traffic of low embankment is analyzed. In this paper, the mechanical properties of steel corrugated pipe culvert under heavy load traffic of low embankment are given, including strain and stress, and the synergism of deformation between steel corrugated pipe culvert and roadbed is studied, which has important theoretical and practical value.
【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】：2015
【分類號(hào)】：U449.83

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本文編號(hào)：2214896