【正文】 I 摘 要 本畢業(yè)設(shè)計(jì)題目為西藏加查至桑日公路第十三合同段，道路位于雅魯藏布江流域。路線區(qū)域內(nèi)主要為山嶺區(qū)，地形起伏較大，設(shè)計(jì)車速 60km/h。設(shè)計(jì)通過(guò)兩個(gè)方案的比選來(lái)確定較佳路線，兩個(gè)路線全長(zhǎng)大概都在三千五百米左右，所選方案二路線全長(zhǎng)，雙向兩車道，路基寬 10m，路面寬 7m。所選瀝青路面設(shè)計(jì)年限 12年。 設(shè)計(jì)包括三個(gè)部分，內(nèi)容如下：第一部分 公路線形設(shè)計(jì)，在本部分，通過(guò)認(rèn)真仔細(xì)的研究，結(jié)合實(shí)際情況，綜合考慮了路線填挖平衡、平曲線的優(yōu)化、平曲線與豎曲線組合原則等，確保了設(shè)計(jì)線形的優(yōu)化 ，然后根 據(jù)兩個(gè)比選方案的技術(shù)經(jīng)濟(jì)指標(biāo)，對(duì)方案進(jìn)行比選，從中確定較合理的方案 —— 第二方案作為推薦方案。第二部分為路基工程設(shè)計(jì)，包括支擋工程設(shè)計(jì)等。第三部分為路面工程設(shè)計(jì)，選擇瀝青混凝土路面和水泥混凝土路面分別進(jìn)行了設(shè)計(jì)，并對(duì)兩個(gè)方案進(jìn)行比選，選定瀝青混凝土路面為推薦方案 , 整個(gè)排水系統(tǒng)由邊溝、排水溝組成 。相關(guān)的圖紙、表格附后 。 關(guān)鍵詞： 路線平面線形 ； 縱斷面設(shè)計(jì) ； 橫斷面設(shè)計(jì) ； 重力式擋土墻； 路面設(shè)計(jì) Abstract II The design is the tenth contract section from Qachas to Mulberry Day in Tibet, and the road is located in the Brahmaputra river basin . In the route region, there is mainly mountain ridge area, and the hypsography is series, so the design speed is 60km/h. The better route is determined through paring of two program in the design. The length both are probably about 3， 500 meters, and the selected program is , two twoway lanes, and the widen of the roadbed is 10m,7m of the pavement. Asphalt cement concrete pavement is designed for twelve years. The design includes three parts, as follows : The road technical road linear design: In this part, through careful review, in light of the actual situation, the author considering the balance of excavation, the optimization of plane curve, the bination of plane curve and vertical curve, to ensure that the design of linear optimization. Then a more reasonable program the second program are remended through paring the two program according to the technical economic indicator. The second part is the roadbed engineering design, which includ retaining engineering design and so on. Part three is pavement design, and the concrete pavement and asphalt cement concrete pavement both are considered and designed petely in the design, asphalt concrete pavement is remended for the program, the whole drainage system is formed as side ditches, drainage ditch and pipe culvert. Related to the drawings, forms attached. Key words ： Route plane linear design； Vertical section design； Crosssection design； gravity retaining walls； Pavement design 目 錄 緒論 ................................................................... 1 １ 畢業(yè)設(shè)計(jì)任務(wù)書 ..................................................... 3 設(shè)計(jì)基本資料 ................................................... 3 III 道路的性質(zhì)與任務(wù) ......................................... 3 道路等級(jí) ................................................. 3 沿線自然地理特征 ......................................... 3 設(shè)計(jì)的主要內(nèi)容及技術(shù)指標(biāo) ....................................... 4 道路類型、等級(jí)的確定 ..................................... 4 道路技術(shù)標(biāo)準(zhǔn)論證 ......................................... 5 豎曲線標(biāo)準(zhǔn)論證 ................................................. 6 坡長(zhǎng) ..................................................... 6 縱坡 ..................................................... 6 豎曲線半徑及長(zhǎng)度 ......................................... 6 視距長(zhǎng)度 ................................................. 7 橫斷面的技術(shù)標(biāo)準(zhǔn)論證 ........................................... 7 行車道數(shù)目及其寬度 ....................................... 7 路基路面的寬度 ........................................... 7 路拱橫坡和路肩橫坡度 ..................................... 7 凈空高度論證 ............................................. 8 車輛荷載論證 ............................................. 8 2 紙上定線和平縱設(shè)計(jì) ................................................. 10 紙上定線 ...................................................... 10 平面線形設(shè)計(jì) .................................................. 10 方案一 .................................................. 11 方案二 .................................................. 15 坐標(biāo)計(jì)算 ................................................ 16 路線縱斷面設(shè)計(jì) ................................................ 18 縱斷面設(shè)計(jì)步驟 .......................................... 18 設(shè)計(jì)計(jì)算公式 ............................................ 19 方案一 .................................................. 19 方案二 .................................................. 23 平縱組合設(shè)計(jì) .................................................. 24 方案比選 ...................................................... 24 主要綜合考慮因素 ........................................ 24 各方案主要指標(biāo) .......................................... 25 方案比選意見 ............................................ 25 3 橫斷面設(shè)計(jì)及路基土石方計(jì)算 ......................................... 27 橫斷 面設(shè)計(jì) .................................................... 27 路基橫斷面 .............................................. 27 超高及加寬 .............................................. 27 路基土石方計(jì)算 ................................................ 28 橫斷面面積的計(jì)算 ........................................ 29 土石方數(shù)量的計(jì)算 ........................................ 29 4 支擋工程設(shè)計(jì) ....................................................... 32 重力式擋土墻的設(shè)計(jì)： .......................................... 32 斷面尺寸 ...................................................... 33 墻頂以上填土土壓力的計(jì)算 ...................................... 33 IV 破裂角 .................................................. 33 土壓力 .................................................. 34 4． 4 墻身斷面強(qiáng)度驗(yàn)算 ............................................. 34 土壓力及彎矩計(jì) 算 ........................................ 34 墻身自重、墻頂填土重及彎矩計(jì)算 .......................... 37 截面應(yīng)力計(jì)算 ............................................ 37 4． 5 基礎(chǔ)底面強(qiáng)度及穩(wěn)定驗(yàn)算 ....................................... 37 土壓力及彎矩計(jì)算 ........................................ 37 墻身填料，墻身、基礎(chǔ)自重及彎矩 .......................... 40 基底應(yīng)力驗(yàn)算 ............................................ 40 基底穩(wěn)定性驗(yàn)算 .......................................... 41 5 路面工程設(shè)計(jì) ....................................................... 42 5． 1 瀝青混凝土路面設(shè)計(jì)（方案一） ................................. 42 軸載分析 ........