道橋?qū)I(yè)二級公路畢業(yè)設(shè)計計算書(已修改)

　

【正文】 I 摘 要 本 設(shè)計是 從 信陽 到 商城某段二級公路 的 設(shè)計 ， 該 段 路線總長為 3054m。本設(shè)計中 設(shè)計 車 速為 80km/h，雙向兩車道 。 本設(shè)計 是在對 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)等級以及設(shè)計需要的各種參數(shù)， 最終 確定采用二級公路的技術(shù)指標(biāo)進(jìn)行設(shè)計。 結(jié)合周圍的地形情況 進(jìn)行了平面線形設(shè)計， 平面線形中有三個轉(zhuǎn)角 。縱斷面的設(shè)計中有 兩 個豎曲線， 滿足 平縱 線形組合設(shè)計中的各種要求。在橫斷面的設(shè)計中，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 中路面設(shè)計 采用瀝青 路面 進(jìn)行 設(shè)計，主要包括 結(jié)構(gòu)層 的 擬定 和 設(shè)計 層厚度計算 。 涵洞設(shè)計 主要是在擬定結(jié)構(gòu)尺寸后進(jìn)行 各種強(qiáng)度的驗算。 設(shè)計中結(jié)合地形及周邊環(huán)境條件，通過兩條線路方案的比選，最終確定最佳方案。 關(guān)鍵詞 ：二級公路 ； 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)計概況 ........................................................................................................... 2 第二章 公路技術(shù)等級的確定 .................................................................................... 3 公 路技術(shù)等級 ................................................................................................... 3 公路等級的確定 ............................................................................................... 4 二級公路技術(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 .............................................................................................. 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 ................................................................................................. 15 線形要素的計算 ............................................................................................ 15 逐樁坐標(biāo)的計算 ............................................................................................ 19 第四章 縱斷面設(shè)計 .................................................................................................. 27 縱斷面設(shè)計原則 ............................................................................................. 27 縱坡設(shè)計要求 ................................................................................................. 28 豎曲線設(shè)計 ..................................................................................................... 30 豎曲線設(shè)計 ................................................................................................... 30 豎曲線的計算 ............................................................................................... 31 平、縱線形組合 ............................................................................................. 34 IV 第五章 橫斷面設(shè)計 .................................................................................................. 35 橫斷面設(shè)計原則 ............................................................................................. 35 橫斷面的組成 ................................................................................................. 36 平曲線加寬設(shè)計 ............................................................................................. 38 超高設(shè)計 ......................................................................................................... 38 第六章 路基設(shè)計 ...................................................................................................... 43 路基設(shè)計的內(nèi)容與要求 ................................................................................. 43 路基斷面設(shè)計 ............................................................................................... 43 路基設(shè)計要求 ............................................................................................... 43 填料的選擇及壓實標(biāo)準(zhǔn) ................................................................................. 44 土石方調(diào)配 ..................................................................................................... 46 調(diào)配原則 .................................