土木工程建筑道橋外文翻譯外文文獻(xiàn)英文文獻(xiàn)瀝青路面結(jié)構(gòu)設(shè)計(jì)的低成本農(nóng)村道路(存儲(chǔ)版)
【正文】 ] Research Institute of Highway , the Ministry of Communications. Final Report on Low Cost Intertownship and Rural Road Construction Techniques〔 R].Beijing。 opinion， the selection of the pavement structure material is the key measure to reduce the construction cost of rural roads after the route has been determined. Compared with concrete pavement， asphalt pavement relatively costs less and is the first choice for rural roads in China. And then， according to the research achievements about rural roads construction， the authors have done some preliminary researches on the structure design for lowcost asphalt pavements for rural roads. 1 Traffic Composition of Rural Road Rural roads include county roads， town roads and village roads. The traffic on rural roads is usually mixed. On a county road, traffic volume is between 300 to 1500 veh/d in average， and in a county with a developed economy， it reaches 1000 to 2 000 veh/d. The traffic volume between county and town is 100 to 300 veh/d， and the traffic volume between towns is usually less than 100 to 300 veh/d. In a mixed traffic flow， trucks 2 account for 40% to 70% of the traffic volume, which are mainly light trucks carrying less than 2. 5 tons(including agricultural vehicles such as electrotricycles， walking tractors etc.)and mediumsize trucks of 2. 5 to 5 tons. Most of these light or medium trucks are overloaded. The proportion of heavy truck is less than 9%.On some roads to counties， the proportion of overloaded trucks is 5% to 32 %， while on some county roads connecting to national or provincial trunk highways， the proportion of overloaded vehicles usually amounts to 20% to 32% . The traffic volume on rural roads is not heavy. However， considering the practical situation in China, as well as the exitence of overloaded vehicles，100kN， or BZZ100 was adopted as standard axle load in the research. The pavement deflection or the flexuraltensile stress at the bottom of asphalt surface is taken as the design parameter. The axle load was calculated in accordance with the following formula: ?isNN )/( si PPCC 和 the axle weight of an ilevel axle in kN and the action frequency。 the axle weight of standard axle in 100 kN and the action frequency。 Resdarch Institute of Highway, 2021(in Chinese). [ 3 ] Liu Q Q. How to reduce the construction cost of the rural highway [ J ] .Journal of Highway and Transportation Research and Development, 2021(2):41 一 44(in Chinese). [ 4 ] JTG B01497. Specification for design of highway asphalt 9 pavement[ S ](in Chinese ). [ 5 ] JTG BO12021. Technical Standard of Highway Engineering [ S ](in Chinese). [6] Deng X J. Engineering for subgrade and pavement[ M].2nd ed. Beijing。近年來(lái) ,中國(guó)的中央政府增加了對(duì)農(nóng)村公路建設(shè)的力量。通信量縣、鎮(zhèn)之間是 100到 300輛 / 天，交通量之間通常低于城鎮(zhèn)是 100至 300輛 / 天。軸載荷計(jì)算方式 ,依照下面的公式 : ?isNN )/( si PPCC 和 為車軸重量和頻率 為總車軸重量和頻數(shù) 如果兩軸之間的距離小于 3 米 ,軸載荷進(jìn)行了計(jì)算： 11 如果彎拉型壓力的半剛性基層底部作為設(shè)計(jì)參數(shù)計(jì)算、軸重依下列公式： 如果兩軸之間的距離小于 3 米： 2 對(duì)農(nóng)村公路交通量 農(nóng)村道路以面包車為車輛的設(shè)計(jì)標(biāo)準(zhǔn)。 3 路基強(qiáng)度 路基回彈模量的變化極大。 4 厚度測(cè)定瀝青路面結(jié)構(gòu) 12 設(shè)計(jì)參數(shù)的靈敏度分析路基和路面結(jié)構(gòu)之間的關(guān)系 ,找出瀝青路面結(jié)構(gòu)強(qiáng)度的結(jié)構(gòu)及設(shè)計(jì)參數(shù) ,并確定各層的最敏感的路面結(jié)構(gòu)層。建議在路面基層厚度和基層應(yīng)等于或大于 18 至 20 厘米 ,分別對(duì)瀝青路面結(jié)構(gòu)設(shè)計(jì) ,農(nóng)村道路。以降低路面變形 ,低成本的農(nóng)村道路路基的強(qiáng)度和穩(wěn)定性的 ,應(yīng)加強(qiáng)對(duì)一定厚度的材料和相對(duì)較高的密度應(yīng)使用統(tǒng)一鋪平道路。不僅是設(shè)計(jì)撓度的主要依據(jù)設(shè)計(jì)厚度的路面結(jié)構(gòu) ,而且必要的檢查驗(yàn)收指標(biāo)的工程。為各種各樣的累計(jì)當(dāng)量軸荷載及模 (E0)的等效厚度路基、基層被顯示在圖 3。研究農(nóng)村公路建設(shè)技術(shù)指標(biāo)的江蘇省 [J].高速公路 ,2021(6):135 一 139(中文 )。 [6]鄧秀驥工程路基和路面 [米 ] .2 版。 [5]JTG BO1 2021。通過(guò)本文的研究方法 ,提出了一種低成本的結(jié)構(gòu)設(shè)計(jì)、瀝青路面。在底部的拉應(yīng)力的半剛性基層或底基層 ,將小于或 等于允許拉應(yīng)力的材料或設(shè)備 ,即統(tǒng)一基礎(chǔ) 對(duì)于穩(wěn)定骨料與無(wú)機(jī)粘結(jié)劑： 為穩(wěn)定細(xì)土基與無(wú)機(jī)粘結(jié)劑 : 鋪裝厚度 為了簡(jiǎn)單 ,便于工程師確定，理想的鄉(xiāng)村公路路面厚度曲線和路面基層的厚度以 14 及低成本農(nóng)村道路根據(jù)典型路面結(jié)構(gòu)和累計(jì)頻率的等效軸重都顯示在表 4 和5。 (2)設(shè)計(jì)撓度 設(shè)計(jì)偏向指數(shù)代表路面結(jié)構(gòu)的剛度。圖二顯示效果的每一層的模量對(duì)路面偏斜。 (2)隨著厚度的增加 ,路面結(jié)構(gòu)的變化將路面變形趨勢(shì)是溫柔。當(dāng)北東向、累積的等效軸重行動(dòng)頻率 ,路面的厚度 (h = 3 厘米的厚度 )、基層 (h2 = 20 厘米 )保持不變 ,鄰近的路基強(qiáng)度的影響分類基層的厚度為 3 cm 一 5 厘米。交通量在表 3 規(guī)定經(jīng)以小巴為標(biāo)準(zhǔn)的車輛類型 ,并將不同類型車輛的車輛折算系數(shù)記錄在所給的表 2，表 3 中 , ? ?? ???? 11365 ??? tseNN Ne 指的是累積的等效軸重行動(dòng)的頻率 Ns 指的等效軸重行動(dòng)的頻率在設(shè)計(jì)交通車道上開(kāi)始運(yùn)行期間 。然而 ,考慮到中國(guó)的實(shí)際情況 ,以及車輛超載 ,要滿足 100 kN,和 BZZ100 標(biāo)準(zhǔn)軸載作用次數(shù)。 農(nóng)村道路上，交通通常是喜憂參半。特別是在廣大農(nóng)村地區(qū) ,有各種各樣的交通方式 ,交通成分非常復(fù)雜。 and that of asphalt surface treatment road surface is1 .2. (3)Allowable deflection
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