發(fā)布時(shí)間：2018-03-25 14:40

  本文選題：平面交叉口　切入點(diǎn)：瀝青路面　出處：《長沙理工大學(xué)》2014年碩士論文

【摘要】：隨著我國城市規(guī)模的迅速擴(kuò)大和經(jīng)濟(jì)的穩(wěn)速發(fā)展,城市道路承載了越來越多的交通量。伴隨著交通量的增長,城市道路中的交叉口路段出現(xiàn)了各種的道路及交通問題。城市道路中平面交叉口的渠化、慢速和水平力較大的特性導(dǎo)致區(qū)域內(nèi)的路面容易產(chǎn)生早起的損壞。交叉口位于若干條道路的相交路段,是城市交通的咽喉之地,這使得交叉口區(qū)域的路面需要較高的行駛質(zhì)量和較長的養(yǎng)護(hù)周期,我國高速發(fā)展的交通和道路行業(yè)也需更為綜合、精細(xì)化的路面結(jié)構(gòu)設(shè)計(jì)。因此,針對平面交叉口的交通特性,進(jìn)行針對性的、獨(dú)特性的路面結(jié)構(gòu)設(shè)計(jì)具有重要的意義。首先,對交叉口范圍的各種定義進(jìn)行辨析,得出用于交叉口區(qū)域路面設(shè)計(jì)的交叉口路面設(shè)計(jì)區(qū)的定義。依托于典型的平面十字信號控制交叉口進(jìn)行建模,對不同水平的主車道和相交車道進(jìn)口道交通量和各進(jìn)口道不同的交通流轉(zhuǎn)向組成情況下的交叉口運(yùn)行狀況進(jìn)行軟件的分析和計(jì)算,得出各種情況下的進(jìn)口道車輛排隊(duì)長度和車輛延誤。對不同的路段設(shè)計(jì)速度下的交叉口路面設(shè)計(jì)區(qū)的上下游長度進(jìn)行計(jì)算,得出不同道路設(shè)計(jì)車速下的交叉口路面設(shè)計(jì)區(qū)的范圍建議值。然后,對交叉口路面設(shè)計(jì)區(qū)內(nèi)區(qū)別于普通路段的交通特性進(jìn)行計(jì)算和分析,特別是對不同交通流轉(zhuǎn)向組成下的道路橫斷面的輪載作用次數(shù)、交叉口物理功能區(qū)的輪載疊加次數(shù)、不同交通量下的交叉口內(nèi)車輛運(yùn)行速度和不同行駛狀況下的路面水平力進(jìn)行計(jì)算和分析,找出交叉口區(qū)域內(nèi)不同于普通路段的交通特性,并對涉及路面設(shè)計(jì)和使用的交通特性進(jìn)行分析和研究。其次,針對瀝青混合料的蠕變特性和交叉口區(qū)域內(nèi)的交通特性,對不同水平力作用下的路面剪應(yīng)力的分布進(jìn)行計(jì)算分析；并對不同水平的輪載重量、交通量、車速和不同的輪載橫向分布狀況下的路面豎向變形進(jìn)行有限元的計(jì)算分析,同時(shí)對不同的交通流方向組成情況下的路面豎向變形對輪載重量、交通量、車速的敏感性進(jìn)行分析探討。得出慢速、水平力、混合料抗剪強(qiáng)度不足特別是層間結(jié)合材料在高溫下的抗剪強(qiáng)度不足是造成交叉口區(qū)域路面早期損壞的根本原因,而不均勻的輪跡橫向分布加劇了損壞速度。最后,根據(jù)交叉口區(qū)域內(nèi)的交通特性和計(jì)算分析結(jié)論,提出豎、縱、橫全方位的路面結(jié)構(gòu)設(shè)計(jì),通過科學(xué)有效的路面結(jié)構(gòu)設(shè)計(jì),保證交叉口區(qū)域道路的使用質(zhì)量和交通運(yùn)行的順暢、安全,并為相同類型區(qū)域的道路設(shè)計(jì)提供新的理念與方法。
[Abstract]:With the rapid expansion of urban scale and the steady development of economy in China, urban roads are carrying more and more traffic volume. There are various road and traffic problems in the intersections of urban roads. The characteristics of slow speed and high horizontal force lead to early morning damage on the road surface in the area. The intersection is located at the intersection of several roads and is the throat of urban traffic. This makes the pavement in intersection area need higher driving quality and longer maintenance period, and the high-speed development of traffic and road industry in our country also need more comprehensive and refined pavement structure design. Therefore, in view of the traffic characteristics of intersections, It is of great significance to design specific and unique pavement structure. First of all, the definition of intersection scope is analyzed. The definition of intersection pavement design area used in intersection area design is obtained, which is based on the modeling of typical cross signal control intersection. The analysis and calculation of the traffic volume of the main lane and the intersecting lane at different levels and the traffic flow of the intersection under the condition of different traffic flow direction of each entrance road are carried out by software. The queue length and vehicle delay are obtained under various conditions. The upstream and downstream lengths of intersection pavement design area at different design speeds are calculated. The range of the design area of intersection pavement under different road design speed is obtained. Then, the traffic characteristics in the design area of intersection road are calculated and analyzed which are different from those in common section. In particular, for the different traffic flow direction of the composition of the road cross-section of the wheel load action times, intersection physical function area of the number of times of the wheel load superposition, In order to find out the traffic characteristics in the intersection area different from the common section, the vehicle running speed and the road surface horizontal force under different traffic volume are calculated and analyzed. Secondly, according to the creep characteristics of asphalt mixture and traffic characteristics in intersection area, the distribution of pavement shear stress under different horizontal forces is calculated and analyzed. At the same time, the vertical deformation of pavement under different load load, traffic volume, speed and lateral distribution of wheel load is calculated and analyzed by finite element method. At the same time, the sensitivity of pavement vertical deformation to wheel load, traffic volume and speed under different traffic flow direction composition is analyzed and discussed. The insufficient shear strength of the mixture, especially the shear strength of the interlayer bonding material at high temperature, is the root cause of the early pavement damage in the intersection area, and the uneven lateral distribution of the wheel track exacerbates the damage speed. According to the traffic characteristic and the calculation analysis conclusion in the intersection area, this paper puts forward the road surface structure design of vertical, longitudinal and transverse directions, which can ensure the smooth use quality and traffic operation of the road in the intersection area through the scientific and effective pavement structure design. Safety, and provide new ideas and methods for road design in the same type of area.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U416.217

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