CAJ | 학술논문

根据成安渝高速公路四川段超高段路基横断面形式，把超高段细分为填方、半填半挖、短挖方、长挖方及超长挖方段等。在对超高段路面排水系统进行水文水力分析的基础上，根据中央分隔带的结构特点和不同断面与尺寸形式下沟管的水力特性，对超高段路面排水进行系统性优化。排水中沟选用水力特性较好的矩形断面，并在原基础上加深、加宽；根据填挖特性，优化集水井和纵向管的设置。针对超长挖方段汇水面积大、排水困难的问题，在中央分隔带底部设直径300 mm 的双壁波纹管，提高汇流面积。优化后的超高段路面排水系统更加协调、安全与通畅。
근거성안투고속공로사천단초고단로기횡단면형식，파초고단세분위전방、반전반알、단알방、장알방급초장알방단등。재대초고단로면배수계통진행수문수력분석적기출상，근거중앙분격대적결구특점화불동단면여척촌형식하구관적수력특성，대초고단로면배수진행계통성우화。배수중구선용수력특성교호적구형단면，병재원기출상가심、가관；근거전알특성，우화집수정화종향관적설치。침대초장알방단회수면적대、배수곤난적문제，재중앙분격대저부설직경300 mm 적쌍벽파문관，제고회류면적。우화후적초고단로면배수계통경가협조、안전여통창。
According to subgrade cross section of Sichuan Cheng’anyu Expressway,the superelevation section was divided into filled mass sections,cut and fill sections,short excavation sections,long excavation sections and longer excavation sections.Based on hy-draulic and hydrologic analysis of the pavement drainage system in the superelevation, the pavement drainage system of super elevation was optimized according to the struc-tural characteristics and the hydraulic characteristics of the dith and the tube.Rectangu-lar cross-section was selected as drainage ditch.Rainage ditch was deepened and wid-ened.The collection of well and vertical pipes was optimized according to the characteristics of cut and fill.Because catchment areas were large and the dragin was difficult in superelevation section,double-wall corrugated pipe diameter of 300 mm was set at the bottom of median separation in order to improve the convergence area.Pavement drainage system of the superelevation section that was optimized would be more coordinated,safe and smooth.