【正文】 checked by puting the stresses of the semirigid base and subbase. The tensile stress at the bottom of semirigid base or subbase， would be less than or equivalent to the allowable tensile stress of the materials of the semirigid base or subbase , namely， For the stabilized aggregate base with an inanic binder For the stabilized finegrained soil base with an inanic binder: Pavement thickness To make it simple and convenient for engineers to determine the desired thickness of rural road pavement, the curves of the thickness of the roadbase of lowcost rural roads according to typical pavement structures and accumulative frequency of equivalent axle load are shown in Figs. 3， 4 and 5. (1)When the accumulative frequency of equivalent axle load is within 500000 times per lane， asphalttreated or asphalt perated surfaces with thickness of 1. 5 cm 一 cm is remended for road surface. For various accumulative equivalent axle loads and the moduli(Eo)of roadbed， the equivalent thickness of roadbase is shown in Fig. 3. (2)When the accumulative frequency of equivalent axle load is within 500 001)一 1 000 000 times per lane， asphalt macadam or asphalt concrete with thickness of 3 cm 5 cm is remended. For various accumulative equivalent axle loads and moduli(Eo)of roadbed， the equivalent thickness of roadbase is shown in Fig. 4. 8 (3)When the accumulative frequency of equivalent axle load is within 1000 0002 000 000 times per lane， asphalt concrete road surface of 5 cm7 cm thick is remended. For various accumulative equivalent axle loads and moduli(Eo)of roadbed , the equivalent thickness of roadbase is shown in ， Ld is the designed deflection, Lo is the representative deflection of roadbed， E, is the modulus of resilience of the roadbase， in MPa , Eo is the modulus of resilience of the roadbed， in MPa ,and H, in cm， is the equivalent thickness of the base (roadbase and subbase)， which can be obtained through calculation and insite investigation for a trilevelpavement roads(including road surface， base and roadbed).If a designed road has four layers， . a subbase is added， according to the regression analysis of the extrapolated results of a number of multilayer flexible systems and the available research findings， the thickness of the roadbase , h,， in cm, can be calculated from the following equation: 6 Concluding Remarks Compared with concrete pavement, asphalt pavements have a lower construction cost, which is suitable for the roads in relatively underdeveloped rural areas in China. The research in this paper proposed a method for structural design of low cost asphalt pavements. The method is to provide an guideline for the design of asphalt pavement structure in rural areas. References [1]Yuan G L , Zhang F , Chen S W , et al. Research on technical indexes of rural highway construction in Jiangsu province [ J ].Highway, 2021(6):135一 139(in Chinese). [ 2 ] Research Institute of Highway , the Ministry of Communications. Final Report on Low Cost Intertownship and Rural Road Construction Techniques〔 R].Beijing。交通運(yùn)輸學(xué)院，東南大學(xué)，南京 210b9b，中國(guó) 2。與其他國(guó)家相比 ,在中國(guó)農(nóng)村地區(qū)交通組成有其自身的特征 . 因此 ,沒(méi)有足夠經(jīng)驗(yàn)對(duì)農(nóng)村公路建設(shè)提供參考依據(jù)。相比 ,瀝青混凝土路面相對(duì)費(fèi)用少、是第一個(gè)在中國(guó)農(nóng)村道路的選擇。一個(gè)平?？h的道路，交通量平均為的 300至 1500 輛 / 天；一個(gè)經(jīng)濟(jì)發(fā)達(dá)的縣 ,已經(jīng)達(dá)到了 1000 到 2021 輛 / 天。重型卡車(chē)的比例小于 9%。 人行道撓度和底部的拉應(yīng)力作為瀝青路面設(shè)計(jì)參數(shù)。如電動(dòng)車(chē) ,摩托車(chē) 和自行車(chē)可以考慮為邊對(duì)農(nóng)村道路交通量的計(jì)算的路邊干擾。 r 指的年增長(zhǎng)率交通量 η指系數(shù) ,一個(gè)車(chē)道為為 ,雙車(chē)道為 一 。采用多層彈性理論對(duì)路面結(jié)構(gòu)表5 中指定的影響 ,在暗夜精靈 ,農(nóng)村道路鋪裝厚度進(jìn)行了分析 ,結(jié)果表明 ,在給定的h,h2,E0、路面基層厚度變化為周邊交通類(lèi)一個(gè)范圍內(nèi)的 4 5 厘米。這一結(jié)論表明 ,路基強(qiáng)度分類(lèi)是合理的、適用于設(shè)計(jì)與施工的瀝青路面結(jié)構(gòu)。使用的基本參數(shù)的計(jì)算與分析瀝青路面結(jié)構(gòu)都列在表 7. 通過(guò)分析影響所有的參數(shù)變化對(duì)路面結(jié)構(gòu)的扭曲 ,基層路面和路基 ,下面 ,結(jié)果顯示。當(dāng)路面的厚度達(dá)到一定值時(shí) ,在路面撓度變化并不明顯 ,然后它是無(wú)效的承載力提高瀝青路面結(jié)構(gòu)通過(guò)增加厚度的路面。增加基層模量或基層也是有效降低路面的變形情況。從上面的討論 ,我們可以得出結(jié)論 :最敏感層底基層路面位移 ,第二是基層。柔性基礎(chǔ)具有良好的強(qiáng)度和有效防止反射裂縫瀝青路面的路面 ,提供了分級(jí)石頭(或礫石 )符合規(guī)定的要求對(duì)高密度 (壓實(shí)度 (100%)(21。它也是的變形情況依法成立的路面累計(jì)的等效軸重估計(jì)越過(guò)一條小巷設(shè)計(jì)壽命的預(yù)期 ,道路類(lèi)型、道路分類(lèi) ,和類(lèi)型的路面 13 和基層。 (3)許用撓度 許用撓度的最大撓度在最不利季節(jié)條件下的允許在這條路的使用壽命。 （ 1)當(dāng)累計(jì)頻率的等效軸重在 500000 次 /年 ,處理過(guò)的瀝青或?yàn)r青滲透表面厚度為 cm 一 4cm 被推薦用于路面。 (3)當(dāng)累計(jì)頻率的等效軸重在 10000002021000 次／車(chē)道 ,瀝青混凝土路面 5厘米厚的 cm7 是被推薦的。這種方法是將提供一個(gè)指導(dǎo)設(shè)計(jì)的瀝青路面結(jié)構(gòu)在農(nóng)村地區(qū) 參考文獻(xiàn) [1]G L,張?jiān)?F、陳年代 W,吳昱。 [3]劉 :如何降低工程造價(jià)的農(nóng)村公路 [J].中國(guó)公路交通的研究與開(kāi)發(fā) ,2021(2):41 一 44(中文 )。公路工程技術(shù)標(biāo)準(zhǔn) [S](中文