1、 Overview This project is a new road project of a street, located in XX Science Park, starting from XX Road in the east and ending at XX Road in the west, with a total length of 837.77m. There is one bridge within the scope of this project, which is XX bridge. The center stake number of the bridge is 0+795.27, and the span is 8m+8m+8m=24m. See the bridge design drawing for the specific design. According to the upper planning, the river channel planning at stake No. 0+340 is not reserved and can be filled during construction. 2、 Design Basis 1. Letter of Authorization for Design of Nanjing XX Science Park Management Committee; 2. Road planning red line of a street; 3. Key points of road engineering design of a street (Hexi 20070106SY01), project approval; 4. Geotechnical engineering investigation report and survey data of a street; 5. Code for Design of Urban Roads (CJJ 37-90); 6. Code for Accessibility Design of Urban Roads and Buildings (JGJ 50-2001); 7. Technical Standards for Highway Engineering (JTJ B01-2003); 8. Code for Design of Highway Subgrades (JTG D30-2004); 9. Code for Construction and Acceptance of Asphalt Pavement (GB 50092-96); 10. Technical Code for Construction of Highway Asphalt Pavement (JTG F40-2004). 3、 Design standard 1. Design grade: urban branch road; 2. Design running speed: 30km/h; 3. Design life of pavement: 10 years; 4. Design load: BZZ-100 is the standard axle load for road pavement design; 5. Seismic fortification intensity: 7 degrees. 4、 Design introduction 1. Project overview (1) Project scale This street project has a total length of 837.77m, starting from XX Road (0+000) in the east and ending at XX Road (0+837.777) in the west. The width of the red line is 24m. (2) Planning profile and significance According to the Regulatory Detailed Planning of XX Science Park, this road is an east-west branch road in XX Science Park. To the north of the road is Hexi Street, the current 65m trunk road, to the south is Jialingjiang East Street, the planned 35m branch road, to the east is XX Road, the planned 35m secondary trunk road, and to the west is XX Road, the current 35m secondary trunk road. The road skeleton around the area has been completed. The implementation of this project is of great significance to improve the traffic convenience in XX Science Park area and improve the road network of the Science Park. According to the road planning red line, the intersection with the road along the line is not channelized. 2. The plane design is based on the red line of road planning. There are 5 intersections along the whole line of the project, and the roads crossing from west to east are respectively XX Road, the planned 16 meter branch road, Xiangshan Road, Yunlongshan Road and XX Road. Among them, XX Road and XX Road are 35m secondary trunk roads, and Yunlongshan Road and Xiangshan Road are 24m branch roads. The road alignment is a straight line. The coordinates of the intersection of the starting point and XX Road are IP0: X=140006.74, Y=125243.70, and the coordinates of the intersection of the ending point and XX Road are IP1: X=140519.23, Y=124580.97. As the general layout of the plots on both sides has not been completed, no sidewalk openings are reserved this time. With the approval of the planning department, the openings on the sidewalk can be increased in combination with the general layout during construction. The existing road at stake No. 0+780 must be rerouted at the intersection of this road to ensure the normal travel of nearby residents. 3. The main control factors of the road profile design are the elevation of the starting and ending points and the intersecting roads, and the elevation of the parcels on both sides. The design elevation of Yunlongshan Road is 7.81m. The design longitudinal gradient of the road is between 0.2500% and 0.3571%. There are two grade change points along the whole line. The radius of the vertical curve is 10000 meters. See the vertical curve design table for details. 4. The cross section of a street is designed to be 24 meters wide. According to the design points, the 24 meter standard cross section is as follows: sidewalk (4 meters) - roadway (16 meters) - sidewalk (4 meters). According to the Code for Design of Accessibility of Urban Roads and Buildings, blind paths must be set on sidewalks, and curb ramps must be set at intersections and unit entrances and exits to facilitate the passage of the disabled. See the design drawings of blind paths and curb ramps for details. The cross slope of the roadway is 1.5%, the flow direction is from inside to outside, the sidewalk is 2% one-way cross slope, the flow direction is from outside to inside, and the arch curve of the roadway is a modified cubic parabola. See the detail drawing of the road arch for details.
