大连理工土木工程13年春季门路勘测设计课程设计功课(国外英文资料).docVIP

大连理工土木工程13年春季道路勘测设计课程设计作业(国外英文资料) Network education college, design of road survey design The topic  some highway construction drawing design Learning center  AD industry  Grade  Learn number  Students  Teachers  one Design traffic volume calculation Within the design of traffic flow of average annual growth rate of 7% in the first year after the completion of  pavement, traffic  as follows Santana 2000  2300  Jianghuai a16600  200  The yellow sea dd680  420  Beijing bj30  200  Ep140  580  Dongfeng sp9250  310 vehicles. Design traffic  dN  0 n x   11 nr    dN in type - vision design annual average daily traffic flow  / day   0 n - starting years the average traffic flow  / day   R - the average annual growth rate of  fixed number of year n - vision design.  generation into the digital calculation Solution    first-stage, highways dN  0 n x   11 nr   =  2300 + 200 + 420 + 200 + 310  * 1 + 0.07   20-1   = 12404.69 m/day  2  secondary and tertiary roads dN  0 n x   11 nr   =  2300 + 200 + 420 + 200 + 310  * 1 + 0.07   15-1   = 8844.37 m/day 2 Two plane design The route design includes graphic design, longitudinal design and cross section design. The road is a three The centerline of the dimension system  it is a space curve. The projection of the midline on the horizontal plane is called the plane of the route. Along the center line of the vertical cutting  unfold as profile. The method of the midline points is the cross section. tao The plane of the road, the longitudinal section and the cross-section are the geometry of the road. Road of planar linear  influenced by obstacles such as the local terrain and object turn  in the turning point Need to set the curve  to ensure the safety of the vehicle body and  in a straight line, two circular radius of circular curve or different The curve is inserted between the curves. Therefore  straight line, round curve, easement curve is a major group of horizont