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道橋?qū)I(yè)外文翻譯--瀝青路面結(jié)構(gòu)設(shè)計(jì)的低成本農(nóng)村道路-文庫(kù)吧在線文庫(kù)

  

【正文】 eflection is the maximum deflection allowed at the end of the road39。 Chen Rongshen(陳榮生 ) 1. College of Transportation, Southeast University, Nanjing 210b9b, China 2. College of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China In developing countries, rural road construction is mostly cumbered by shortage of funds. Engineers concerns most in rural areas is how to build roads which not only cost less but also meet the traffic demands. Especially in vast rural areas of China, there are a great variety of transportation patterns, and the traffic position is very plex. Compared with other countries, the traffic position in China rural areas have its own features. Therefore, there is no experience about the rural roads construction for reference. In recent years, the central government of China has increased the strength for rural road construction. At the same time, a lot of researches about rural road construction have been done by researchers in China, and some conclusions about china rural roads have been made. In the authors39。 If the distance between axles is less than 3 m, axle loads are calculated as a doubleaxle or multiaxle loads, and If the flexuraltensile stress at the bottom of semirigid base is taken as the design parameter, the axle load is calculated in accordance with the following formula: If the distance between axles is less than 3m, 2 Traffic Volume on Rural Roads Minibuses are adopted as the standard vehicle for the design of rural roads. Table 1 shows its external dimensions. Table 1 External dimensions of the passenger car m Length Width Height Front overhang Distance between axles Rear overhang The typical vehicle types on rural roads are listed in Table 2. And others such as nonpowerdriven vehicles, animaldrawn vehicles, and bicycles can be taken into account in the calculation of traffic volume on rural roads, in view of their roadside interference. 3 In accordance with the traffic position and volumes, rural roads are divided into five grades. The traffic volume of each grade is shown in Table 3. Traffic volume specified in Table 3 was obtained by taking the minibus as the standard vehicle type,and converting different types vehicles according to the vehicle conversion coefficients given in Table Table 3, ? ?? ???? 11365 ??? tseNN Ne refers to the cumulative equivalent axle load action frequency。 People39。與此同時(shí) , 在中國(guó) , 研究人員已經(jīng)完成 了關(guān)于 中國(guó)農(nóng)村道路 的 大量 研究 和 一些結(jié)論。在一個(gè)混合交通流、卡車占有 40%到 70%的交 通量 ,主要 為 輕型卡車攜帶小于 噸 (包括農(nóng)業(yè)車輛如拖拉機(jī)等 )、行走、中型卡車 5噸。表 1顯示了其外部尺寸。為方便起見(jiàn) ,路基的強(qiáng)度可以分為四類根據(jù)其含水率和模量的韌性 ,顯示在表 4。瀝青路面結(jié)構(gòu) ,農(nóng)村道路通常是由一個(gè)基層路面 ,和統(tǒng)一 ,顯示在表 6。圖 1 顯示變化的影響各層厚度對(duì)路面偏斜。 交通體積或累計(jì)的等效軸重行動(dòng)的時(shí)間 (頻率 )內(nèi)的生活道路是設(shè)計(jì)用來(lái)確定型和厚度的瀝青路面面層 ,結(jié)果列于表 8,輛 /天 意味著 每天的等效客車數(shù) 。通過(guò)理論分析和試驗(yàn)研究 ,設(shè)計(jì)彎沉值公式 ,適用于路面結(jié)構(gòu)設(shè)計(jì)的隔間農(nóng)村道路如下 半剛性基層: 柔性基層 : As 是路面類型系數(shù) ,瀝青混凝土路面系數(shù)為 ,瀝青混合料的級(jí)配碎石和乳化瀝 青碎石路面都是 。 (2)當(dāng)累計(jì)頻率的等效軸重在 500000 一 1000000 次/ 車道、瀝青碎石瀝青混凝土厚度或 3 厘米 ,5 厘米是被推薦的。 [2]研究所 ,中華人民共和國(guó)交通部公路。北京,人民交通出版社,北京 , 2020(中文)。規(guī)格設(shè)計(jì)的高速公路瀝青路面 [S](中文 )。如果一個(gè)設(shè)計(jì)的路四層 ,即是說(shuō) ,按照統(tǒng)一的推算 ,結(jié)果進(jìn)行回歸分析的多個(gè)多層靈活的系統(tǒng)和已有的研究結(jié)果 ,路面基層的厚度、 H、 ,厘米 ,可以計(jì)算出下列方程 : 6作為結(jié)束語(yǔ) 相比 ,瀝青路面混凝土路面施工成本較低 ,適合于在相對(duì)欠發(fā)達(dá)農(nóng)村地區(qū)的道路。 拉應(yīng)力 由于瀝青路面結(jié)構(gòu)的隔間農(nóng)村道路不是實(shí)體足夠的和重型車輛經(jīng)過(guò)允許的最大拉伸應(yīng)力 ,應(yīng)當(dāng)檢查通過(guò)計(jì)算應(yīng)力的半剛性基層和底基層。它不僅反 映了整體強(qiáng)度和剛度的前提和路基、路面結(jié)構(gòu)也有著緊密的內(nèi)在聯(lián)系和服務(wù)條件的人行道上。當(dāng)路面模量的增大到一定數(shù)值時(shí) ,降低路面變形不明顯。比較經(jīng)濟(jì)和有效的方法是提高基層的厚度 ,優(yōu)于基層厚度的增加 ,而提高路面的厚度是最后的選擇。 采用多層彈性理論 ,瀝青路面結(jié)構(gòu)的普通鄉(xiāng)村公路表 5 中進(jìn)行了分析。每一等級(jí)通信量見(jiàn)表 3。 交通量對(duì)農(nóng)村道路不會(huì)很重。 1 農(nóng)村道路交通組成 農(nóng)村道路包括縣公路、城市道路和村的道路。工程師最 關(guān)心的 農(nóng)村問(wèn)題是如何修建 的 公路不僅成本低 ,而且滿足交通需求。that of hotmix asphalt macadam and that of emulsified asphalt macadam road surface are all 1. 1。239。 Ns refers to the equivalent axle load action frequency in the designed traffic lane in the beginning operation period of rural roads。s Communications Press, Beijing, 2020(in Chinese ). 9 中文譯文 瀝青路面結(jié)構(gòu)設(shè)計(jì)的低成本農(nóng)村道路 袁國(guó)林 1,陳榮生 2 1。在作者的觀點(diǎn) ,選擇不同的路面結(jié)構(gòu)材料是關(guān)鍵措施 ,從而 降低農(nóng)村道路 的 工程造價(jià)。大部分的 輕 或中等卡車超載。 典型的車輛類型農(nóng)村道路都列在表 2。 表 5 的參數(shù)確 定設(shè)計(jì)原則相結(jié)合的實(shí)踐經(jīng)驗(yàn)。分析了路面結(jié)構(gòu)的多人游戲根據(jù)彈性理論的雙圓弧均布載荷下 ,假設(shè)接觸有連續(xù)相鄰層的瀝青路面結(jié)構(gòu)。 (3)路面位移的變化非常敏感 對(duì)于 路基 系數(shù) E0。低交 通量公路 即 Ne≦ 500000, 分級(jí) 破碎的結(jié)石 (或礫石 )可以用來(lái)作為一個(gè)靈活的基地。而路面瀝青表面
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