公路（Highway）.docVIP

公路（Highway） Completion 1, modern modes of transportation include highways, railways, water areas, airlines and pipelines. 2, the plane alignment consists of (straight line segments and curve segments). 3, the structure of the highway mainly consists of (Lu Ji, road, bridge and culvert, tunnel, drainage works, road crossing engineering and facilities along the highway) 4, two stages of design: (preliminary design and construction drawing design) stage. 5, the plane alignment combination type generally has: (basic type, s type, oval shape, convex type, compound type and C type) six kinds of combinations. 6, the highway cross section generally includes (pavement, subgrade, shoulder, central compartment, sidewalks) and in the scope of land within the set of signs, such as the entire section. 7, the bridge is divided into simple supported beam bridge, continuous beam bridge and cantilever beam bridge according to the static system of bearing structure. 8, the main arch of the double curved arch bridge consists of arch rib, arch wave, arch plate and transverse connection 9, highway grade is the index that reflects the vehicle (capacity and highway service level, technical level) of the highway. 10, in the standard, according to the traffic volume of function and adaptation, the highway is divided into five grades: highway, first class highway, two grade highway, three grade highway and four grade highway. 11, the highway profile directly affects the safety and speed of traffic, (engineering cost, operating costs and passengers) comfort, it is one of the main contents of highway alignment design. 12, (water) is the main cause of subgrade and its structural diseases. 13, from the bridge pier (abutment cap, pier and foundation of three parts). 14, according to the structural force system, the bridges can be divided into (Liang Qiao, arch bridge, rigid frame bridge, suspension bridge and composite system bridge). 15, the decks of reinforced concrete and prestressed concrete b