文档介绍：镇安县 K1+000 ~ K3+000 二级公路道路工程设计摘要本二级公路是镇安县公路网中的一条主要干线,对镇安县经济发展起着很大的作用。本路线途经山岭重丘区之间的平原地带,本着安全、经济、实用、美观的原则,对该路段进行设计。该设计段公路的总长为 2000 m 。本设计是在根据所在地区的地形、地质、气候的影响,按照设计规范进行的。本次设计的内容有:平面线设计、纵断面设计、横断面设计、路面设计。平面线设计包括纸上选线、定线,圆曲线、缓和曲线参数设定,直线设计等;纵断面设计包括拉坡、竖曲线设计等,在竖曲线设计时,应注意行车视距和视线诱导问题; 横断面设计时,使行车更加舒适,为确保道路的使用年限,在路段上还做了排水设计;路面设计时,结合当地的实际交通量及交通量增长规律,进行方案比较后采用沥青混凝土路面,进行了路面结构组合设计并进行了结构层厚度验算。关键词: 平面纵断面横断面路基路面设计 ABSTRACT This secondary road in ZhenAn county isone of the major trunk roads. To ZhenAn county economic development, it plays a great role. This route goes through plain strip between mountains. According to the principles flollowing ,safe, economic, practical,and beautiful, this section of the road is general it is 2000m. The design is based on the region's topography, climate, according to the design design of content: graphic design, longitudinal design, the cross-sectional design, pavement design. Graphic design includs selecting route, fixing line, curve and linear curve parameter setting, etc. Longitudinal design includes vertical curve, slope, etc..In the design of vertical curve, vision induction and driving beyond question should be paid attention. Cross-sectional design should make driving fortable, in order to ensure the use of roads, in section do drainage the road surface is designed, combining local actual traffic rules and growth is used the asphalt concrete pavement after pians pared. the pavement structure design and structure layer thickness also done. Key words: Plane Longitudinal Cross-sectional Pavement Design 目录 1 设计原始资料和依据 设计原始资料 镇安县概况镇安县地处西安以南,商州以西,东经 108 ° 34′— 109 ° 36′;北纬 33°8′— 33° 48′东西长 km ,南北宽公 km ,莽莽秦岭之南坡。总面积 3487 2 km 。秦岭横贯北境,林海涛涛的原始森林是国家生物基因库。地形以西北高,境内最高点拔杨泅乡鹰嘴石海拔 m ;东南低,易河谷最低海拔 541m 。从西北向东南,山脉延伸尤如五指,唐代诗人贾岛笔下“一山末了一山迎,百里都无半里平”真实的描绘了镇安“九山半水半分田”的自然土石山区地貌。中部是海拔 700 -1400 米的中低山川,以易河、乾佑河两大水系为主,有川道平地及青秀山峦,有地壳运动,海底台升的喀斯特地貌及海底海螺化石沉积。有金山粮仓著称的鱼米之乡,亦有商贾云集的古镇,还有筹备未开采的铁山、银矿