城市立交匝道接地位置选择探讨

城市立交接地匝道接地位置的选择是否合理,严重影响着匝道甚至立交的通行效果.针对此问题,结合昆明二环石闸立交接地匝道设置工程实例,首先,对平交口进口道及出口道的匝道位置进行了分析,探讨了如何确定接地匝道离地面平交口的最小距离.然后,对如何合理布置匝道口在道路横断面上的位置进行了分析,对匝道口在横断面上靠左、靠中、靠右设置...

Discussion on Position Selection of Grounding Ramp of Urban Interchange

Whether or not reasonably to select the grounding ramp position of urban interchange will seriously affect the traffic effect of ramp and even interchange. Aiming at this problem, combined with an engineering case of setting the grounding ramp for Shizha Interchange in Kunming Ring II, the ramp positions of entrance road and exit road of intersection at grade are analyzed. How to determine the minimum distance of grounding ramp to ground intersection at grade is discussed. How to reasonably arrange the position of ramp on the cross section of road is analyzed. The setting of the ramp on the left, center and right on the cross section is discussed respectively. The obtained conclusion shows that the grounding position of grounding ramp has a great influence on the traffic effect of ramp. The on-ramp and off-ramp of grounding ramp should keep a certain distance from the ground intersection at grade. Various factors should be comprehensively analyzed to arrange the grounding ramps at the most suitable positions on the cross section of road. The traffic effect of ramp is better from the effects of engineering cases.