Road w orks Roads resulting from human activities associated with ，And to promote social progress and development，Is a symbol of history and civilization、A sign of scientific progress，The original road is formed by people trampling trails。After the requirements have a better road ，Borrow pit fill，Frame wood across the river to Easy access。 Mid-18th century，Modern road construction began in Europe the rise. In 1747 the first bridge to establish the school in Paris. Teresa French P.-M.-J. cover、British Mark T. Telford and J.L. when other Engineers propose a new pavement structure theory and practice, Laid the foundation of modern road construction. 1883 - 1885 Germany G.W. Daimler、C.F. Benz invented the 道路伴同人类活动而产生，又促进社会的进步和发展，是历史文明的象征、科学进步的标志，原始的道路是由人践踏而成的小径。 以后要求有更好的道路，取土填坑，架木过溪，以利通行。 18 世纪中叶，现代道路工程开始在欧洲兴起。1747 年第一所桥路学校在巴黎建立。法国P.-M.-J.特雷萨盖、英国T.特尔福德和 J.L.马克当等工程师提出新的路面结构理论和实践，奠定了现代道路工程的基础。1883～1885 年德国car，Created by automobile traffic and new road works in the modern era. 1931 ~ 1942, Germany built the highway network, Provides for the automotive traffic safety, speed, economy, comfort driving conditions. Subgrade Roadbed is the main route, is the basis of the road and the vehicle load and road surface to bear. Its cross-section of embankment fill and cut into the embankment-type situation, cutting style, half-filled and half-dug-style categories. Shoulder on both sides of the rembankment is within the zone edge for supporting the road, parked vehicles or for temporary pedestrian use. Earthwork embankment into difficulty by excavation earthworks(Cultivation, ordinary soil, hard...
