本文關(guān)鍵詞： 喇叭形互通式立交 占地面積 匝道圓曲線半徑 通行能力 服務(wù)水平 VISSIM 交通仿真　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國高速公路網(wǎng)逐漸形成，路網(wǎng)的節(jié)點(diǎn)必然要修建互通式立交。目前有部分立交追求規(guī)模大、設(shè)計速度高、設(shè)計線形指標(biāo)高，導(dǎo)致立交工程投資和占地面積過大。由于我國人口多，土地資源有限。如何既能有效的降低立交規(guī)模，又能滿足未來交通量需求，是本文研究論述的問題。 本文以喇叭形互通式立交為研究對象，用立交占地面積表示立交規(guī)模。分析了影響立交規(guī)模的因素，包括立交的地理位置、被交路與主線的交角、匝道的圓曲線半徑、縱斷面的設(shè)計、視距的影響、超高與設(shè)計速度、超高與圓曲線半徑的關(guān)系等。重點(diǎn)分析了匝道圓曲線半徑對立交規(guī)模的影響，并建立匝道圓曲線半徑與立交用地規(guī)模計算模型。 基于立交匝道的設(shè)計必須滿足期望的通行能力和服務(wù)水平，在合理控制立交規(guī)模的同時必須要考慮交通工程因素，通過對立交的交通流特性分析，基于通行能力的計算模型、服務(wù)水平的分級，得出了不同通行能力、不同服務(wù)水平的立交規(guī)模推薦值。 參考《公路路線設(shè)計規(guī)范》服務(wù)水平等級的劃分，以交通流密度為評價指標(biāo)，對龍門立交工程實(shí)例的大、中、小三種規(guī)模的方案進(jìn)行分析，以目標(biāo)服務(wù)水平為標(biāo)準(zhǔn)，利用VISSIM仿真評價，驗(yàn)證基于服務(wù)水平的立交規(guī)模推薦值的適用性。 本文將喇叭形互通式立交的規(guī)模與服務(wù)水平相聯(lián)系，得出基于服務(wù)水平的立交規(guī)模推薦值，設(shè)計人員根據(jù)預(yù)測交通量，指定目標(biāo)服務(wù)水平，可以合理選取匝道線形指標(biāo)，控制立交規(guī)模，這對于山區(qū)地形受限時，，避免大填大挖、破壞生態(tài)，具有重要意義。
[Abstract]:With the gradual formation of the highway network in China, the nodes of the road network must build interchanges. At present, some of the interchanges are in pursuit of large scale, high design speed and high design linear index. Because of the large population and limited land resources, how to reduce the scale of interchange and meet the demand of traffic volume in the future is the problem discussed in this paper. In this paper, the loudspeaker interchange is taken as the research object, and the scale of the interchange is expressed by the area occupied by the interchange. The factors influencing the scale of the interchange are analyzed, including the geographical position of the interchange, the intersection angle between the intersection and the main line, and the radius of the circle curve of the ramp. The design of longitudinal section, the influence of visual distance, the relationship between super-high and design speed, between super-high and radius of circular curve, etc. The influence of the radius of ramp circle curve on the scale of interchange is analyzed emphatically, and the calculation model of radius of circle curve of ramp and the scale of interchange land is established. Based on the design of interchange ramp, the expected capacity and service level must be satisfied, the traffic engineering factors must be considered while the scale of interchange is reasonably controlled, and the calculation model based on traffic capacity is obtained by analyzing the traffic flow characteristics of the interchange. The grade of service level, obtained different capacity, different service level of interchange scale recommended value. Referring to the classification of service level grade of Highway Route Design Code, taking traffic flow density as evaluation index, this paper analyzes the large, middle and small scale schemes of Longmen Interchange project, and takes the target service level as the standard. By using VISSIM simulation evaluation, the applicability of the recommended value of interchange scale based on service level is verified. In this paper, the scale of loudspeaker interchange is connected with the service level, and the recommended value of the interchange scale based on service level is obtained. According to the forecast traffic volume and the target service level, the designer can reasonably select the ramp alignment index. Controlling the scale of interchange is of great significance to avoid large fill and dig and destroy ecology when terrain is limited in mountainous area.
【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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