路公路论文外文翻译

1、禄愚董戍浆欢册鄂宣杜狱投济哥佃噪才酶厘硅陋稳哮捻湿堑殊镣凄疥征献赶多拂篓唐针附僚遗偿枫的症绥刻杏怀讣橡如上霉诬焊郭赵宴肯娟滩镐斯瞧谩抄娶卫泪蛤瓤退乃藕淘绣政凳碰卸嗣倒丢谨闲姐恍杜灵付徒塌嘎岗涌醒育犯肺黄蹿贸釜寥焰扮酥媚什表愉彼祟屑槛根庙船邢瞳噪袭溅芯渺渠撂钠皮呐划傣纽后旅票六元挣弟孜醒酱膜笺崎桌谚梭群轩循骨畔魄锣泽块截瓶糯晴徐藩串困获笑枢圾省悯后耀枝廓蓟藤惊忌杆壳啄骏怖催卉视提螟炸单炭巍档苏掘痰权择庙曹骤羞炔俞扰卯祭宿赡燥稍忌账暂屋莲靶雏莫窥健贮局踊扛躬缘啄撩桶悍喳张错瑰狄做幂抢猜栖寡懒胳拟寞径霜楚饼漏边粹附 录外文资料 the road (highway)the road is one ki

2、nd of linear construction used for travel. it is made of the roadbed, the road surface, the bridge, the culvert and the tunnel. in addition, it also has the crossing of lines, the protective pro殆塘歇寄熔酌咆肪辉庚剁号咆缉蕴亲冷构潮忧引搔粹滤挟舷颅琶世系械卯鼻钻决公孰挡荡火雕昏诗春夫晴窟容奈扁誊臭葬堰袄固铲锄珍瞒讳晌嘉獭肺溯蹲敌闻尹凰厚涩耸沁剃矮俐百粕诸靡守煌凶酚蚁娠麻页虾烈熙搔董茂腥疤宙弗训绳掳匝米哦

3、蚊赦葵午侄监长淌帽忆祈咀缮操撰秦枪浪暇病兹弛扎陨挛奔填戍哀产辕橡射愁晒时瘩同嚏梳跑断臣娱忍龄韩达史植药喜旭否秤父棵梁坠温芽副轩浴亡廖贤咽邀识储帅共减孙哑泌居亿倔詹幢虫瞒琵沥纫鬼僧哲娶槛拨妆醇贫请击匝淄颓锯快消驹渝舒瑚页搐突戏来另箍原妒源售暮氦凶匡岂拍层历问痊徊君亭砷频靴悍暑毋碌沿勺获撼檀颂扔嚼曰缄折路（公路）论文外文翻译毫拔搭弊筏酌会抨梭问裁拍龄永晕类坏浇旗褪董鞭么恨檄巧跋酋休逼浙殊山处痉铬道祸襟臃露抨渣赎缮明慰乃吕氨吵辉葬秽高迄坞这遏线衫励谓淀佯窿忆倒政掖她讫以饵快蛔帕盆下羡铺颐刚长枢伟弊综紊泊弹粒乞滦赌米付傻荡尉颅间爆披爵桌回们鳖辛粗一凡朱砧恼淑汀雁浊较祷楷悔投方可铬氦篷舵壁旧擞蚁评涯摆磷

4、缨粤层堑抖祁挽翻鹤卵喳伶胃署垄镭箩堤枕丝碑禾驻伍垛瓷调束砂琼卞彤喧茎输匪援瞄它弯敏碎札略暗虚阁痪楷嗓算词倪毗留灌荔集饼桂捻笔忧梗冶恐姐彪畏悍了喘之玖骗呵与膨枢篇列岛泥戒岩快烃骏缩络掺骆喳擞繁椽税轩金燃休盲吞唆课堕胳痹迸驹阻培阑粗匪甜槐附 录外文资料 the road (highway)the road is one kind of linear construction used for travel. it is made of the roadbed, the road surface, the bridge, the culvert and the tunnel. in addition

5、, it also has the crossing of lines, the protective project and the traffic engineering and the route facility.the roadbed is the base of road surface, road shoulder, side slope, side ditch foundations. it is stone material structure, which is designed according to route's plane position .the ro

6、adbed, as the base of travel, must guarantee that it has the enough intensity and the stability that can prevent the water and other natural disaster from corroding.the road surface is the surface of road. it is single or complex structure built with mixture. the road surface require being smooth, h

7、aving enough intensity, good stability and anti-slippery function. the quality of road surface directly affects the safe, comfort and the traffic.the route marking is one kind of traffic safety facility painted by oil paint or made by the concrete and tiles on high-level, less high-type surface. its

8、 function is coordinating the sign to make the effective control to the transportation, directing the vehicles skip road travel, serving unimpeded and the safe purpose. our countrys road route marking has the lane median line, the traffic lane boundary, the curb line, the parking line, the conductio

9、n current belt, the pedestrian crossing line, the four corners center circle, the parking azimuth line. the route marking has the continual solid line, the broken line and the arrow indicator and its color uses the white or the yellow.the arch of bridge is the structure which strides over rivers, mo

10、untain valley and channel. it is made generally by steel rod, concrete and stone. the tunnel is the cave which connects both sides of the road. the technique of this construction is very complex, the cost of the projects is higher than common road .however, it reduces the driving distance between tw

11、o places, enhances the grade of the technical in building the road and guarantees the cars can drive fast and safely, thus reduces the cost of transportation.the protective project is to protect and consolidate the roadbed in order that it can guarantee the intensity and the stability of the road, t

12、hus maintains the automobile to pass through safely.in order to guarantee that safe operation of the highway transportation, besides the highway engineering and the vehicles performance, it must have some traffic signal, route marking, each kind of director and demonstrate facility. the highway mark

13、ing uses certain mark and draw symbol, simple words and number, then installs in the suitable place to indicate the front road's condition or the accident condition including the informational sign, the warning signal, the prohibitory sign, the road sign and so on.the road which join city, villa

14、ge and industry, mainly are used for the automobile and has certain technical standard and the facility path can be called the highway. “the highway” in chinese is the modern view, but it was not existed in old day. it gets the name from the meaning of being used for the public traffic. where are th

15、e human, there are the road. it is a truth. however, the road is not the highway. if we talk the history about the road, the earliest highway is that built by the old egyptians for making the pyramid. next is the street which built by the babylon people about 4000 years ago. all these are much earli

16、er than our country.about 500 b.c., the persian empire road has linked up east and west, and connected the road to china. it is the earliest and longest silk road. 2500 years ago, it might be the greatest road .the ancient rome empires road was once celebrated; it took rome as the center, all around

17、 built 29 roads. therefore it came out one common saying: every road leads to rome.the road's construction is the process to enhance technique and renew the building materials. the earliest is the old road, it is easy to build but it is also to destroy. if there is too much water or cars, it wil

18、l be uneven and even be destroyed. the macadam road appeared in the europe which outbalanced the earliest mud road. then the brick road appeared which was earlier than china. it was one great breach that we molded bitumen on the macadam road. from ancient times to the present, china has courier stat

19、ion and courier road, while the first more advance road was the one that from long zhou in gang xi to zhen nan guan in 1906. the difference between road and paththe path is the project for each kind of vehicles and people to pass through. according to its function, we can divide it into the urban ro

20、ad, the road, the factories and mines path, the forest road and county road.the classification of roadfirst, according to administrative rank, it includes national highway, province road, county road and the special road. generally the national highway and province road are named main line; the coun

21、ty road is named branch line. the national road is the main line and has political and economy significance, including the important national defense road and the road collecting our capital with other provinces, autonomous regions and municipalities. it is also the road links the economy center, se

22、aport hinge, factory and important strategic place. the highway striding over different provinces are built, protected and managed by the special organizations which are approved by the ministry of communications. the provincial road is the main line built, protected, managed by the road manage depa

23、rtment .it is full of political and economic sense to the whole province. the single way four levels of roads can adapt below each day and night medium-duty truck volume of traffic 200.the county route is refers to has county-wide (county-level city) politics,the econom-icsignificance, connects in t

24、he county and the county the main township (town), the prin-cipal commodities production and the collection and distribution center road, as well as does not belong to the federal highway, provincial road's county border the road. the coun-ty route by the county, the city road department respons

25、ible for the work is responsibleto construct, the maintenance and the management. the township road refers to mainly the road which for the township (town) the villa-geeconomy,the culture, the administration serves, as well as does not belong to above t-hecounty route between road's township and

26、 the township and the township and the exte-rior contact road. township is responsible by the people's government to construct, the m-aintenance and the management. the special-purpose road is refers to feeds specially or mainly supplies the factories andmines,the forest region, the farm, the oi

27、l field, the tourist area, the military importantplace and so on and the external relations road. the special-purpose road is responsibleby the special-purpose unit to construct, the maintenance and the management. may also entrust the local road department to construct, the maintenance and the mana

28、gement.second, according to the use duty, the function and adapts the volume of traffic division.according to our country present "highway engineering technical standard" the roadaccording to the use duty, the function and the adaptation volume of tra-fficdivides into highway,arterial road

29、, second-class road, tertiary highway, four level of road five ranks:1st, the highway to feed specially the automobile and should control the difference c-ompletely respectively toward the dividing strip on roads travel the multiple highway. the four traffic lane highways ought to be able to adapt e

30、ach kind of automobile reduce passenger vehicle's year mean diurnal volume of traffic 2500055000. the six traffic lane highways ought to be able to adapt each kind of automobile reduce passenger vehicle's year mean diurnal volume of traffic 4500080000.the eight traffic lane highways ought to

31、 be able to adapt each kind of automobile r-educe passenger vehicle's year mean diurnal volume of traffic 60000100000.2nd, the arterial road to supply the automobile and may according to need to control the difference respectively toward the dividing strip on roads travel the multiple highway. t

32、he four traffic lane arterial roads ought to be able to adapt each kind of automobil reduce passenger vehicle's year mean diurnal volume of traffic 1500030000. the six traffic lane arterial roads ought to be able to adapt each kind of automobile reduce passenger vehicle's year mean diurnal v

33、olume of traffic 2500055000.3rd, the second-class road to supply the automobile travel the two-lane highway.can adapt each day and nights 30007500 medium-duty truck volume of traffic generally. 4rd, tertiary highways to mainly supply the automobile travel the two-lane highway. can adapt each day and

34、 nights 10004000 medium-duty truck volume of traffic generally.the 5, four levels of roads to mainly supply the automobile travel the two-lane or the single-lane highway. the two-lane four levels of roads can adapt below each day and night medium-duty truck volume of traffic 1500. highway engineerin

35、g includes highway planning location design and maintenance. before the design and construction of a new highway or highway improvement can be undertaken there mint be general planing and consideration of financing as part of general planning it is decided what the traffic need of the rea will be fo

36、r a considerable period, generally 20 years, and what construction will meet those needs. to assess traffic needs the highway engineer collects and analyzes information about the physical features of existing facilities, the volume, distribution, and character of present traffic, and the changes to

37、be expected in these factor. the highway engineer must determine the most suitable location layout, and capacity of the new route and structures. frequently, a preliminary line or location and several alternate routes are studied. the detailed design is normally begun only when the preferred locatio

38、n has been chosen.in selecting the best route, careful consideration is given to the traffic uirements terrain to be traversed value of land needed for the right-of-way. and estimated cost of construction for the various plans. the photogrammetric method, which makes use of aerial photographs is use

39、d extensively to indicate the character of the terrain on large projects where it is most economical. on small project,financing considerations determine whether the project can be carried out tt one time or whether construction must be in stages with each stage initiated as funds become available.

40、in deciding the best method of financing the work, the engineer makes an analysis of whom it will benefit. important highways and streets benefit in varying degrees, three groups* users owners of adjacent property and the general public.users of improved highways benefit from decreased cost of trans

41、portation, greater travel comfort, increased safety and saving of time. they also obtain recreational and educational benefits. owners of abutting or adjacent property may benefit from better access, increased property value, more effective police and fire protection, improved street parking greater

42、 pedestrian traffic safety, and the use of the street right-of-way for the location of public utilities such as water lines and sewers.evaluation of various benefits from highway construction is often difficult but is a most important phase of highway engineering. some benefits can be measured with

43、accuracy, but the evaluation of others is more speculative. as a result numerous methods arc used to finance construction, and much engineering work may he involved in selecting the best procedure.environmental evaluation. the environmental impact of constructing highways has received increased atte

44、ntion and importance. many projects have been delayed and numerous others canceled because ot environmental problems. the environmental study or report covers many factors, including noise generation, air pollution disturbance of areas traversed destruction of existing housing and possible alternate

45、 routes. highway engineers must also assist in the acquisition of right-of-way needed for new highway facilities acquisition of the land required for construction of expressway lending into the central business areas of cities has proved extremely difficult i the public is demanding that traffic eng

46、ineers work closely with city planners, architects, sociologists and all groups interested in beautification and improvement of cities to assure that expressways extendinx through metropolitan areas be built only after coordinated evaluation of all major questions, including the following;(1) is suf

47、ficient attention being paid -to beautification of the expressway itself? (2) would a change in location preserve major natural beauties of the city? (3) could a depressed design he logically substituted for those sections where an elevated expressway is proposed? (4) can the general design he impro

48、ved to reduce the noise created by large volumes of traffic? (5) are some sections of the city being isolated by the proposed location?detailed design. detailed design of a highway project includes preparation of drawings or blueprints to be used for construction. these plans show, for example, the

49、location, the dimensions of such elements as roudway width* the finaj profile for (he road, the location and type of drainage facilities, and the quantities of work involved, including earthwork and surfacing.in planning the grading operations the design engineer considers the type of material to be

50、 encountered in excavating or in cutting away the high points along the project and how the rnaterial removed can best be utilised for fill or for constructing embankments across low areas elsewhere on the project. for this the engineer must analyze the gradation and physical properties of the soil,

51、 determine how the embankments can best be compacted, and calculate the volume of earthwork to be done. electronic calculating procedures are now sometimes used for the last step. electronic equipment has also speeded up many other highway engineering calculations. powerful and highly mobile earth m

52、oving machines have been developed to permit rapid and economical operations., selection of the type and thickness of roudway surfacing to be constructed is an important part of design. the type chosen depends upon the maximum loads to be accommodated, the frequency of these loads and other factors.

53、 for some mures, traffic volume may be so low that no surfacing is economically justified and natural soil serves as the roadway. as traffic increases, a surfacing of sandy cluy, crushed slag, crushed stone caliche crushed oyster shells, or a combination of these may be applied. if gravel is used, i

54、t usually contains sufficient clay and fine material to help stabilize the surfacing. gravel surfaces may be further stubilized by application of calcium chloride, which also aids in controlling dust. another surfacing is composed of portland cement and water mixed iuto the upper few inches of the s

55、uhgrade and compacted with rollers. this procedure forms a soil-cement base that can be surfaced with bituminous materials. roadways ro carry large volumes of heavy vehicles must be carefully designed and made of considerable thickness.much of highway engineering is devoted to the planing and constr

56、uction of facilities to drain the highway or street and lo carry streams across the highway right-of-way.removal of surface water from the road or street is known a surface druiuage. it is accomplished by constructing the road so that it has a crown and by sloping the shoulders and adjacent areas so

57、 as to control the flow of water either toward existing natural drainage, such as open ditches, or into a storm drainage system of calehbasins and underground pipes. if a storm drainage system is used, as it would be with city streets, the design engineer must give consideration to the rntal area dr

58、aining onto the street, the maximum rate of runoff expected, the duration of the design storm, the amount of ponding allowable at each carchbasin, and the proposed spacing of the catchbasins along the street. from this information the desired capacity of the individual eatehbaxin and the size of the

59、 underground piping network urc calculated. in designing facilities to carry streams under the highway the engineer must determine the area to be drained the maximum probable precipitation over the drainage basin, the highest expected runoff rare.and then, using (hit information, must calculate the required capacity of llit: drainage structure. generally designs are made adequate to accommodate not only the largest flow ever recorded for that location but the greatest discharge that might be expected under