互通式立交匝道停车视距检验方法及改善措施

高速公路互通式立体交叉在进行设计时,需要对匝道平曲线段的停车视距进行核查检验,尤其是圆曲线内侧存在路基护栏、桥墩桥台以及路堑边坡和植物等对通视有影响的物体,且圆曲线半径较小的匝道.此外,还需要对分合流鼻端前的公路路段进行识别视距的检验.本论文基于《公路立体交叉设计细则》(JTG/T D21—2014),讨论在不同设计速...

Inspection Method and Improvement Measures for Parking Sight Distance of Interchange Ramp

In the design of expressway interchangeable interchanges,it is necessary to check the parking sight distance of the flat curve section of the ramp,especially if there are roadbed guardrails,bridge piers and abutments on the inner side of the circular curve,as well as road cutting slopes and plants,etc.Affected objects,and a ramp with a smaller radius of the circular curve.In addition,it is also necessary to carry out a test to identify the sight distance on the road section in front of the sub-merging nose.Based on the Design Rules for Highway Interchange(JTG/T D21-2014),this paper discusses the calculation method for the widening of sight distance under different design speeds and parking sight distances of different models,and proposes the parking sight distance of interchange ramps at the same time.Improvements to the calculation method.