门路勘察设计温习题(国外英文资料).docVIP

道路勘察设计复习题(国外英文资料) The first chapter of the introduction What is the most important indicator in the technical standards of highway engineering? Why? 2, due to the design in the design of highway traffic volume is different, in the same terrain partition segmented using different road grade, adjacent sections design calculation should not be more than the difference between the driving speed. What is the classification of city roads and how different from the classification of highways? What is the relationship between design capacity and service level? Chapter ii problem of automobile driving theory What are the driving resistance of cars? What are the necessary conditions for driving? What is the power factor of a car, which reflects the performance of a car? 3, known a road of rolling resistance coefficient is 0.015, if type dongfeng EQ140 truck loading of 90%, the hanging file constant speed driving at a speed of 30, 1 v try o (1) = 0, (2) = 1500 that can overcome the biggest on the elevation gradient. If the dongfeng eq-140 truck starts at the rate of 80, it will climb on the 3 percent slope, and reach the top of the ramp when the ramp is 600. Assume the maximum lateral force coefficient of a curve is 0.10 (1) how much speed is allowed when = 500m = 5%? ????? (2) when is equal to 80km/h, = -2%, when the radius of the flat curve should be at least? 6, set a path specified maximum longitudinal grade of 5%, when the car at a speed of 80 for 250, high transverse slope in the radius of 8% on the plane curve of driving, to calculate the maximum longitudinal grade after reduction. The third chapter? Road plane line? Problem sets The mathematical expression of the tangent and internal displacement of the curve of the road curve with the detente curve is derived from the test series expansion method. 2, one class ii highway in plains known one corner, Angle = 15 ° 28 30, radius = 600, = K2 + 536.48. Requirements: (1) choose the reasonable length of the detente curve ???