【正文】 長沙學(xué)院 畢業(yè)設(shè)計 (論文 ) I 摘 要 本設(shè)計是湖南省龍山至永順二級公路初步設(shè)計，路段地處丘陵區(qū)，沿路地形起伏在 400～ 600m 之間，路線起止樁號從 K4+ 至 K7+006，該公路的主要技術(shù)指標(biāo)為路基寬度 ，雙向雙車道，無中央分隔帶，設(shè)計車速 60km/h。本次設(shè)計的是二級公路的初步設(shè)計，首先進(jìn)行了地形圖的研究，在熟悉地形圖之后，查閱了當(dāng)?shù)叵嚓P(guān)的地形地質(zhì)，水文氣候條件，擬定了兩條路線比選方案，在經(jīng)過比較技術(shù)指標(biāo)及經(jīng)濟(jì)指標(biāo)后，最終選擇最佳方案。在路線的平面設(shè)計之后，進(jìn)行了縱橫斷組合設(shè)計、路基設(shè)計、路面設(shè)計。在路基路面設(shè)計完成 之后，路基設(shè)計專項中的擋土墻設(shè)計以及路基路面排水的設(shè)計。擋土墻采用的是重力式擋土墻，排水防護(hù)設(shè)計進(jìn)行了邊溝、排水溝以及截水溝的組合形式。然后進(jìn)行了涵洞以及平面交叉設(shè)計，本路線需要構(gòu)造兩處涵洞，采用圓管涵形式，交叉口采用加鋪轉(zhuǎn)角式。最后對進(jìn)行了工程的概預(yù)算，利用縱橫概預(yù)算軟件計算，概算金額為 11439135 元。 關(guān)鍵詞 ： 湖南，龍山，永順，二級公路，初步設(shè)計 長沙學(xué)院 畢業(yè)設(shè)計 (論文 ) II 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+ main technical indexes for highway roadbed width , a twoway 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 parison 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, crosssectional design, roadbed design, roadbed design is plete, 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 pleted, 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 two culverts, using pipe culvert form,Intersection using overlay corner . At the end of the project budget, project budgetary estimate, according to the actual situation, using aspect software over the budget, budget amount of 11439135 yuan. Keywords:Hunan,Longshan,Yongshun,two highway,preliminary design 長沙學(xué)院 畢業(yè)設(shè)計 (論文 ) III 目 錄 摘 要 ................................................................................................................ I ABSTRACT.......................................................................................................II 第 1章 緒 論 .................................................................................................. 1 第 2章 設(shè)計總說明 .......................................................................................... 2 地質(zhì)地貌水文狀況 ............................................................................................ 2 地形地貌 ................................................................................................ 2 氣象水文 ................................................................................................ 2 地層巖性 ................................................................................................ 2 沿線材料供應(yīng) ........................................................................................ 2 工程概況 ............................................................................................................ 3 交通量資料 ........................................................................................................ 3 設(shè)計依據(jù) ............................................................................................................ 3 第 3章 路線設(shè)計 .............................................................................................. 5 道路等級確定 .................................................................................................... 5 初始年交通量的確定 ............................................................................. 5 設(shè)計交通量的計算 ................................................................................ 6 公路等級的確定 ..................................................................................... 7 路線擬定 ............................................................................................................ 7 選線原則 ................................................................................................ 7 選線的步驟 ............................................................................................ 8 方案比選 ............................................................................................................ 8 兩方案特點(diǎn)比較 .................................................................................... 9 第 4章 線形設(shè)計 ............................................................................................. 11 平面設(shè)計 ............................................................................................................ 11 路線概念 ............................................................................................... 11 直線 ...................................................................................................... 11 圓曲線 .................................................................................................. 11 緩和曲線 ............................................................................................... 12 長沙學(xué)院 畢業(yè)設(shè)計 (論文 ) IV 平曲線要素計算 ............................................................................ 13 縱斷面設(shè)計 ...................................................................................................... 15 縱斷面設(shè)計原則 .................................................................................. 15 縱坡設(shè)計的步驟 .....................