Study on the DaQing Interchange Type-Selection

Abstract

This paper analyzes the relevant factors of the type-selection of DaQing highway interchange, and with the study of the importance of the interchange in the road network, the volume of traffic, and site condition, investment cost. This paper presents rhombic -shape and single-horn type schemes. Further, this paper compares the two schemes from the technical and economical aspects such as the traffic conditions ,cost and the status of area-cover, then recommends rhombic -shape scheme. General Situation of the EngineeringNational Highway conditions of terrain and distribution of obstacles Within the scope of Daqing interchange the north ground of Provincial Highway 23 is relatively flat, the ground elevation is about 10m-12m, and on the south side the ground is undulate with the elevation 14m~23m.There are crowded buildings and houses and a river named Nan is about 280m distant from the interchange. The river flows from east to west. There is a primary school near by the interchange. On the west side of the main line there are mountain and local roads and irrigation river. Interchange Type Schemes IntroductionDaqing interchange type scheme is restricted by many factors, such as terrain conditions and specifications for requirements of the distance between the interchange and another interchange, an interchange and a tunnel ②③ .This paper presents two schemes: rhombic -shape and single-horn type schemes. scheme I Rhombic -shape which schemes the main line crosses over Provincial Highway 23.The design speed of the ramps is 40 km/h. Each direction have one ramp and with the roadbed width of 8.5m.