湖南省龙山至永顺二级公路初步设计_毕业设计(论文).doc

长沙学院毕业设计(论文) PAGE I PAGE I 湖南省龙山至永顺二级公路初步设计 摘 要 本设计是湖南省龙山至永顺二级公路初步设计，路段地处丘陵区，沿路地形起伏在400～600m之间，路线起止桩号从K4+000.000至K7+006，该公路的主要技术指标为路基宽度8.5m，双向双车道，无中央分隔带，设计车速60km/h。本次设计的是二级公路的初步设计，首先进行了地形图的研究，在熟悉地形图之后，查阅了当地相关的地形地质，水文气候条件，拟定了两条路线比选方案，在经过比较技术指标及经济指标后，最终选择最佳方案。在路线的平面设计之后，进行了纵横断组合设计、路基设计、路面设计。在路基路面设计完成之后，路基设计专项中的挡土墙设计以及路基路面排水的设计。挡土墙采用的是重力式挡土墙，排水防护设计进行了边沟、排水沟以及截水沟的组合形式。然后进行了涵洞以及平面交叉设计，本路线需要构造两处涵洞，采用圆管涵形式，交叉口采用加铺转角式。最后对进行了工程的概预算，利用纵横概预算软件计算，概算金额。 关键词：湖南，龙山，永顺，二级公路，初步设计 PAGE VII PAGE VII ABSTRACT The design of Hunan province Longshan to Yongshun two road sections in the preliminary design, the basin, basin surrounded by mountains surrounded by, its elevation in 400～600 meters between. The two stage highway begins to pile No. K4+000, end pile No. K7+006.The main technical indexes for highway roadbed width 8.5m, a two-way dual carriageway, without the central dividing strip. The design of the speed60km/h. This design is the two highway preliminary design, first carried out the study on topographical map, in a familiar terrain map, access to the local topography and geology, hydrology and climate conditions. The initial formulation of the two route alternatives, after comparison of technical indicators and the actual engineering situation, the final choice of relatively suitable scheme. In the course of graphic design, proceed with the longitudinal design, cross-sectional design, roadbed design, roadbed design is complete, start a pavement design, considering the actual situation of the project, finally decided to take the road design of cement concrete pavement. In the design of roadbed and road surface is completed, a retaining wall and drainage and protection design. The retaining wall is used in gravity retaining wall, drainage and protection design for the side ditch drainage ditches and drainage design. After conducting a culvert and the intersection of the plane of the preliminary design, the route need to construct