【正文】 I 摘 要 本 設(shè)計(jì)是 從 信陽(yáng) 到 商城某段二級(jí)公路 的 設(shè)計(jì) ， 該 段 路線總長(zhǎng)為 3054m。本設(shè)計(jì)中 設(shè)計(jì) 車(chē) 速為 80km/h，雙向兩車(chē)道 。 本設(shè)計(jì) 是在對(duì) 交通量進(jìn)行 分析，查找相應(yīng) 的 技術(shù)規(guī)范 的基礎(chǔ)上， 確定 出 公路的 技術(shù)等級(jí)以及設(shè)計(jì)需要的各種參數(shù)， 最終 確定采用二級(jí)公路的技術(shù)指標(biāo)進(jìn)行設(shè)計(jì)。 結(jié)合周?chē)牡匦吻闆r 進(jìn)行了平面線形設(shè)計(jì)， 平面線形中有三個(gè)轉(zhuǎn)角 ?？v斷面的設(shè)計(jì)中有 兩 個(gè)豎曲線， 滿(mǎn)足 平縱 線形組合設(shè)計(jì)中的各種要求。在橫斷面的設(shè)計(jì)中，確定了橫斷面組成及各種要素后，繪制 出 橫斷面圖。 本 設(shè)計(jì) 中路面設(shè)計(jì) 采用瀝青 路面 進(jìn)行 設(shè)計(jì)，主要包括 結(jié)構(gòu)層 的 擬定 和 設(shè)計(jì) 層厚度計(jì)算 。 涵洞設(shè)計(jì) 主要是在擬定結(jié)構(gòu)尺寸后進(jìn)行 各種強(qiáng)度的驗(yàn)算。 設(shè)計(jì)中結(jié)合地形及周邊環(huán)境條件，通過(guò)兩條線路方案的比選，最終確定最佳方案。 關(guān)鍵詞 ：二級(jí)公路 ； 縱斷面 ； 橫斷面 ； 瀝青路面 ；涵洞 II Abstract This design is a secondary road design from Xinyang to Shangcheng and the total length of the section is 3054m. The design speed is 80km/h and the road has two lanes. The parameters which are needed in the design are defined by analyzing the traffic and searching the corresponding technical specification. Finally the secondary road’s technical specification is designed. Based on the surrounding terrain, the alignment of the highway is designed, which has three corners. There are three vertical curves in the design of vertical alignment, which all meet the design requirement of the linear bination. In the cross section design, the cross section diagrams are drawn after determining the position and cross section elements. The design of the asphalt pavement mainly contains the selection of the structure layer and the calculation of the layer thickness. The intension of the structure is checked after the selection of the dimensions of the structure in the culvert design. The design is bined with the terrain and surrounding environment conditions, and through the parison of two line programs, the best solution is ultimately determined. Keywords： Secondary road, vertical section, cross section, Asphalt pavement，culvert III 目 錄 第一章 緒 論 ............................................................................................................ 1 概述 ................................................................................................................... 1 選題意義 ........................................................................................................... 1 設(shè)計(jì)概況 ........................................................................................................... 2 第二章 公路技術(shù)等級(jí)的確定 .................................................................................... 3 公 路技術(shù)等級(jí) ................................................................................................... 3 公路等級(jí)的確定 ............................................................................................... 4 二級(jí)公路技術(shù)指標(biāo)核算 ................................................................................... 5 公路技術(shù)標(biāo)準(zhǔn) .................................................................................................... 6 第三章 公路平面設(shè)計(jì) .............................................................................................. 10 選線的一般原則 ............................................................................................. 10 平原微丘地區(qū)選線原則 ................................................................................. 10 選線方法及步驟 ............................................................................................. 13 方案的擬定與初步比選 ................................................................................. 14 平面線形設(shè)計(jì) ................................................................................................. 15 線形要素的計(jì)算 ............................................................................................ 15 逐樁坐標(biāo)的計(jì)算 ............................................................................................ 19 第四章 縱斷面設(shè)計(jì) .................................................................................................. 27 縱斷面設(shè)計(jì)原則 ............................................................................................. 27 縱坡設(shè)計(jì)要求 ................................................................................................. 28 豎曲線設(shè)計(jì) ..................................................................................................... 30 豎曲線設(shè)計(jì) ................................................................................................... 30 豎曲線的計(jì)算 ............................................................................................... 31 平、縱線形組合 ............................................................................................. 34 IV 第五章 橫斷面設(shè)計(jì) .................................................................................................. 35 橫斷面設(shè)計(jì)原則 ............................................................................................. 35 橫斷面的組成 ................................................................................................. 36 平曲線加寬設(shè)計(jì) ............................................................................................. 38 超高設(shè)計(jì) ......................................................................................................... 38 第六章 路基設(shè)計(jì) ...................................................................................................... 43 路基設(shè)計(jì)的內(nèi)容與要求 ................................................................................. 43 路基斷面設(shè)計(jì) ............................................................................................... 43 路基設(shè)計(jì)要求 ............................................................................................... 43 填料的選擇及壓實(shí)標(biāo)準(zhǔn) ................................................................................. 44 土石方調(diào)配 ..................................................................................................... 46 調(diào)配原則 .................................