门路勘测设计计算题(国外英文资料).docVIP

道路勘测设计计算题(国外英文资料) Try to calculate the minimum radius of the park curve and the general minimum radius (an integer of 50 meters). Solution: the equation for the balance of force on the curve is as follows: The minimum radius of the garden curve is equal to the radius of 250 meters, which is the minimum radius of the garden curve 2. A mountain area general secondary roads, variable slope pile number of K5 + 030, height of 427.68 m, i1 = 5%, i2 = 4%, vertical curve radius R = 2000 m, the calculation of vertical curve and pile for K5 + 000 and all key elements of the design elevation of K5 + 100. The solution (1), i1 = 0.05 (1)? I2 = -0.04 (1 point) w = i2 - i1 = - 0.09? Is the convex curve L equals Rw = 2000 * 0.09 = 180? ? T = L / 2 = 90??? E = T * T/(2 r) = 2.0 the starting point of the vertical curve mileage pile number = K5 + 030-90 = K4 + 030 starting point of the vertical curve height = 427.68-90 * 0.05 = 0.05 K5 + 000 x = 60??????? H = x * x/(2R) = 0.9? Design height = 426.18-0.9 = 425.28 K5 + 100 x = 160??? H = x * x/(2R) = 6.40? Design height = 431.18-6.4 = 424.78 One class ii highway in 3. There is a corner, the plane curve radius R = 400 meters, the intersection JD50 pile number of K8 + 075.756, Angle, if the easement curve length of 70 meters, with adjacent intersections JD50 JD51 is 460 m, the distance between (1) of five main point try to calculate the pile number. (2) calculate the pile number of JD51. Solution: (1) the flat curve five main point piles, calculate the geometrical elements of the flat curve The five basic pile Numbers of the flat curve ZH: HY: QZ: YH: HZ: (2) the pile number of the JD51 is calculated as follows: the interspaced distance = jd51-jd50 = 460 (meters); HZ = K8 + 205.953, and T = 134.473 meters JD51 = 460-134.473 + K8 + 205.953 = K8 + 531.48 The highway has three successive slope points: K8 + 700, K9 + 100, K9 + 380, the corresponding designs are 77.756 meters, 65.356 meters, 68.716 meters. If the radius of the vertical curve