預應力橋圖紙.dwg
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2008-10/預應力橋圖紙.rar一、設計依據
1．公路橋涵設計通用規范（JTJ021-89）。
2．公路鋼筋混凝土及預應力混凝土橋涵設計規范（JTJ023-85）。
3．公路橋涵地基與基礎設計規范（JTJ024-85）。
二、基本情況
***橋是在**公路***1號橋的內側加寬8.1m形成：2×0.55（安全帶）+2×7.0m （行車道）+1.5m（中央分隔帶）的新橋。我院于99年6月底對該橋位進行了橋位測量，測得老橋起訖點樁號為：K0+041.12~K0+134.67（假定樁號）；新加寬部分的起訖點樁號為：K0+060.39~K0+131.716，其技術標準：
橋面凈空：凈-7+2×0.55m
設計荷載：汽車-20級，掛車-100
橋面縱坡：0%；橫坡：1.5%（單向）
橋位場區地震裂度小于規范要求，未考慮地震設防。
三、地質情況
甲方未提供橋位處的地質資料，但兩岸均有明顯的片麻巖露頭。設計要求橋臺基礎底面應置于承載能力不小于1Mpa的新鮮巖石面上，若施工開挖到設計標高后無法滿足設計要求的承載能力，請施工單位和甲方務必通知設計單位，以便采取措施解決。
四、橋型結構
First, design basis
1. General Highway Bridge Design Specification (JTJ021-89).
2. Reinforced concrete and prestressed concrete highway bridges and culverts (JTJ023-85).
3. Highway Bridge Design Code base and foundation (JTJ024-85).
Second, the basic situation
*** *** Road Bridge is No. 1 in ** the inside of the bridge widening 8.1m form: 2 × 0.55 (seat belt) +2 × 7.0m (lane) +1.5 m (median) of new Bridge. Our hospital in 99 years by the end of June to the bridge site for the bridge position measurement, the measured Stake for the Old Bridge Ends: K0 +041.12 ~ K0 +134.67 (assuming Stake); new widened as part of the Ends Stake : K0 +060.39 ~ K0 +131.716, its technical standards:
Bridge clearance: Net -7 +2 × 0.55m
Design load: Automotive -20 level, trailers -100
Deck Longitudinal: 0%; cross slope: 1.5% (one-way)
Bridge location field earthquake intensity zone is less than specifications, are not considered earthquake fortification.
Third, geological conditions
Party did not provide the bridge is located at the geological data, but both sides have had significant gneiss outcrops. Design requirements should be placed in the underside of abutment foundation bearing capacity of not less than 1Mpa fresh rock surface, if after the excavation to the design level can not meet the design requirements of carrying capacity, please be sure to notify the construction unit and design unit Party to take measures to address.
4, the bridge structure