發(fā)布時間：2018-11-22 20:38

【摘要】：隨著我國公路交通事業(yè)的快速發(fā)展,橫穿高速公路的涵洞數(shù)量日益增多,各式各樣的涵洞結(jié)構(gòu)型式也不斷涌現(xiàn)，在眾多涵洞結(jié)構(gòu)形式中，近年來在涵洞工程中迅速得到發(fā)展和廣泛應(yīng)用的鋼波紋管涵洞由于其自身的柔性、高強度、優(yōu)良的適應(yīng)地基與基礎(chǔ)變形的能力且具有自重輕、運輸方便、施工簡單且施工工期短、造價低、對地基擾動小等優(yōu)點正日益受到工程研究人員的廣泛關(guān)注。但國內(nèi)對其在工程中的受力與變形特性的研究相對起步較晚，在行業(yè)內(nèi)還未形成系統(tǒng)成熟的理論，在此背景之下，本文依托山西龍城高速公路在晉中市榆次區(qū)為高填方路基汛期排水而設(shè)的鋼波紋管涵洞工程，對鋼波紋管涵洞進行了室內(nèi)試驗研究,鑒于離心模型試驗相對其他模型試驗較能真實反映原型的應(yīng)力狀態(tài)，將鋼波紋管模型置于離心應(yīng)力場中，利用傳感器測量其在不同工況下的應(yīng)力應(yīng)變，并結(jié)合有限元分析軟件ANSYS對涵管模型進行數(shù)值模擬，得出在不同試驗工況下其應(yīng)力應(yīng)變的變化規(guī)律，結(jié)果表明: 鋼波紋管涵洞的管頂、管側(cè)沿著波形(斷面)方向呈現(xiàn)出不同的應(yīng)力應(yīng)變變化趨勢,波峰和波谷處以及內(nèi)側(cè)和外側(cè)、切向和軸向的應(yīng)力應(yīng)變呈現(xiàn)出管頂與管側(cè)相反的拉壓變化規(guī)律，另外，鋼波紋管的受力在涵管與路基主線夾角、填土高度，涵管直徑變化時呈現(xiàn)出不同的變化規(guī)律，最終經(jīng)分析確定其最佳施工方案，將理論研究成果綜合應(yīng)用到所依托工程中，對鋼波紋管施工技術(shù)的應(yīng)用和推廣起到一定的理論和實踐指導(dǎo)作用。
[Abstract]:With the rapid development of highway traffic in our country, the number of culverts across the highway is increasing day by day, and various culvert structure types are emerging, among which, In recent years, the steel bellows culvert, which has been rapidly developed and widely used in culvert engineering, is easy to transport because of its flexibility, high strength, excellent ability to adapt to the deformation of foundation and foundation. The advantages of simple construction, short construction period, low cost and small disturbance to the foundation have been paid more and more attention by engineering researchers. However, the domestic research on its mechanical and deformation characteristics in engineering started relatively late, and the theory of system maturity has not been formed in the industry. Under this background, Based on the steel corrugated pipe culvert project of Shanxi Longcheng Expressway in Yuci District of Jinzhong City for drainage of high embankment during flood season, an indoor test study on the steel corrugated pipe culvert is carried out in this paper. In view of the fact that the centrifugal model test can truly reflect the stress state of the prototype compared with other model tests, the steel bellows model is placed in the centrifugal stress field and its stress and strain under different working conditions are measured by the sensor. With the finite element analysis software ANSYS, the model of culvert is numerically simulated, and the variation law of stress and strain is obtained under different test conditions. The results show that the top of the culvert of corrugated steel pipe is the top of the culvert. The tube side shows different stress-strain variation trend along the direction of waveform (section). The stress and strain at the peak and trough, inside and outside, tangential and axial direction, show the opposite tension and compression law between the top of the tube and the tube side, in addition, the stress and strain at the wave peak and the trough are opposite to those of the tube side. The stress of steel corrugated pipe varies with the angle between culvert and subgrade main line, filling height and culvert diameter. Finally, the best construction scheme is determined by analysis, and the theoretical research results are applied to the project. It plays a guiding role in theory and practice for the application and popularization of steel bellows construction technology.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U449

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