本文關(guān)鍵詞：互通式立交范圍內(nèi)主線主要技術(shù)指標(biāo)研究　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 互通式立交 主線 識別視距 圓曲線半徑 豎曲線半徑 縱坡

【摘要】：互通式立交主線作為互通式立交的“軀干”部分，，其平、縱面技術(shù)指標(biāo)選取的合理與否關(guān)系到互通式立交整體的安全性與工程經(jīng)濟(jì)性。雖然我國《公路路線設(shè)計(jì)規(guī)范中》（JTG D20-2006）對互通式立交范圍內(nèi)主線主要技術(shù)指標(biāo)作了明確的規(guī)定，但并沒有就相關(guān)技術(shù)指標(biāo)的取值依據(jù)做出詳細(xì)的說明，并且國內(nèi)也很少有研究人員對其進(jìn)行研究。在設(shè)計(jì)中，設(shè)計(jì)人員對互通式立交主線指標(biāo)的選取比較隨意，導(dǎo)致平、縱線形指標(biāo)不盡合理，不能滿足分、合流車輛行駛安全和工程經(jīng)濟(jì)性要求。因此，對互通式立交主線技術(shù)指標(biāo)的研究，成為互通式立交領(lǐng)域一個亟需解決的問題。 論文首先通過對目前國內(nèi)外已有研究成果進(jìn)行分析，提出了互通式立交范圍內(nèi)主線圓曲線、豎曲線以及縱坡等技術(shù)指標(biāo)選取的限制因素，主要包括車輛行駛的安全性和舒適性、駕駛員對互通式立交出口的識別視距以及互通式立交的整體性等。然后通過分析駕駛員對互通式立交分流鼻處地面標(biāo)線的識別以及制動過程，計(jì)算得出了駕駛員對立交出口的識別視距值，并結(jié)合圓曲線半徑和豎曲線半徑的幾何計(jì)算模型，提出了不同設(shè)計(jì)速度時基于識別視距的互通式立交主線平、豎曲線半徑推薦值。最后，針對互通式立交出口主線為下坡和入口主線為上坡這兩種行車安全不利的情況，利用加、減速車道長度計(jì)算模型，結(jié)合縱坡對主導(dǎo)車型加速度和減速度的影響，分別計(jì)算主線不同縱坡時主導(dǎo)車型到達(dá)出口分流鼻和入口匯流點(diǎn)的運(yùn)行速度，并與安全運(yùn)行速度相比較，提出互通式立交主線范圍內(nèi)縱坡的推薦值。 研究結(jié)論為互通式立交主線平、縱指標(biāo)的選取提供了理論依據(jù)，對互通式立交的設(shè)計(jì)人員具有重要的指導(dǎo)意義。
[Abstract]:As the "trunk" part of the interchange, the main line of the interchange is flat. Whether the technical index of longitudinal plane is reasonable or not is related to the overall safety and engineering economy of the interchange. Although JTG D20-2006 is in the Design Code of Highway Route in China). The main technical indexes of the main line in the scope of the interchange are clearly stipulated. However, there is no detailed explanation on the value basis of relevant technical indicators, and there are few domestic researchers to study it. In the design, the designers choose the main line index of interchange more casually. As a result, the horizontal and longitudinal alignment index is not reasonable and can not meet the requirements of safety and engineering economy of the combined flow vehicle. Therefore, the study on the technical index of the main line of interchange. It has become an urgent problem in the field of interchange. Firstly, through the analysis of the existing research results at home and abroad, the paper puts forward the main line circle curve, vertical curve and vertical slope in the interchanges. Mainly includes the vehicle driving safety and comfort. The identification distance of the driver to the exit of the interchange and the integrity of the interchange. Then the identification and braking process of the driver on the ground mark at the diverging nose of the interchange are analyzed. The recognition horizon value of the driver to the exit of the interchange is calculated. Combined with the geometric calculation model of the radius of circular curve and vertical curve, the main line level of interchange based on the recognition distance of sight is put forward at different design speeds. The vertical curve radius is recommended. Finally, aiming at the situation that the main line of interchange exit is downhill and the main line of entrance is uphill, the calculation model of lane length of acceleration and deceleration is used. Combined with the influence of longitudinal slope on acceleration and deceleration of the main vehicle, the speed of the leading vehicle to the outlet shunt nose and the inlet confluence point is calculated respectively when the main line is different in the longitudinal slope, and compared with the safe running speed. The recommended value of longitudinal slope in the main line of interchange is put forward. The conclusion provides a theoretical basis for the selection of the main line and longitudinal index of the interchange, and is of great significance to the designers of the interchange.
【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】：U412.352.1

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