CAJ | 학술논문

针对小环岛立交线形指标低、曲率曲折多、曲线参数多、整体连续性和安全性能差的特点，提出采用双纽曲线应用于小环道，并分析了其路用性能和综合效益。结果表明：双纽曲线由于曲率变化率均匀，除了进道和出道，不存在曲率突变情况，线形连续，整体性能好，而且离心加速度变化率小，行车舒适；当实际行车速度不超过设计速度的25％时安全性高；采用双纽曲线能够减少占地面积，当缓和曲线越长时越经济。在整体式小环道中，双纽曲线可以作为一种补充方法予以借鉴推广。
침대소배도입교선형지표저、곡솔곡절다、곡선삼수다、정체련속성화안전성능차적특점，제출채용쌍뉴곡선응용우소배도，병분석료기로용성능화종합효익。결과표명：쌍뉴곡선유우곡솔변화솔균균，제료진도화출도，불존재곡솔돌변정황，선형련속，정체성능호，이차리심가속도변화솔소，행차서괄；당실제행차속도불초과설계속도적25％시안전성고；채용쌍뉴곡선능구감소점지면적，당완화곡선월장시월경제。재정체식소배도중，쌍뉴곡선가이작위일충보충방법여이차감추엄。
Based on the characteristics of the small roundabout interchange of low linear indicator, many twists and turns and curves parameters,poor overall continuity performance and security,the paper proposed to use Lemniscates curve in the small ring road and analyzed its road performance and compre-hensive benefits.The results showed that:because of the uniform rate of change of curvature,there is no curvature mutation,and the linear is continuous,so the overall performance is good in addition to the exit and the entrance.More importantly,the linear has small centrifugal acceleration change rate and the high-performance security.If the actual vehicle speed is below 25% of the design speed,the traffic safety is very satisfactory.Meanwhile,the curve can reduce the floor space requirements,and the longer the tran-sition curve,the more economical efficiency.Therefore,the lemniscates curve can be used as a comple-mentary method to reference and promote in integral small ring road.