【正文】 1 目 錄 摘要 ................................................................................................................2 Abstract 第一章 橋梁結(jié)構(gòu)方案比選 . 方案比選 ............................................................................................... 4 . 設(shè)計(jì)資料 ............................................................................................... 7 第二章 行車道板及主梁內(nèi)力橫隔梁的計(jì)算 . 行車道板內(nèi)力計(jì)算 ................................................................................8 . 行車道板的配筋 ...................................................................................10 . 主梁結(jié)構(gòu)重力內(nèi)力 ...............................................................................11 . 主梁 內(nèi)力 計(jì)算 .....................................................................................15 . 橫隔梁的計(jì)算 .....................................................................................19 第三章 裝配式鋼筋混凝土簡(jiǎn)支 T 形梁橋配筋設(shè)計(jì) . 設(shè)計(jì)資料 ....................................................................... .......................22 . 跨中正截面鋼筋設(shè)計(jì) .........................................................................22 . 跨中正截面承載力復(fù)核 .......................................................................24 . 腹筋設(shè)計(jì) ...............................................................................................25 . 全梁承載力校核 ...................................................................................31 . 橫隔梁配筋 ...........................................................................................33 第四章 主梁截面驗(yàn)算 . 支座計(jì)算 ............................................................................................ .34 . 裂縫計(jì)算 .......................................................................................... ...38 . 撓度 計(jì)算 ............................................................................................39 . 橋孔灌注樁、雙柱式橋墩設(shè)計(jì) ........................................................41 第五章 施工方案 . 鉆孔灌注樁 ..........................................................................................42 . 承臺(tái)施工 ............................................................................................45 . 墩身 施工 ...........................................................................................46 . 蓋梁、橋臺(tái) 施工措施 .........................................................................48 . 梁體預(yù)制 ...........................................................................................49 . 橋面施工工藝流程 ....................................................................... .....51 結(jié) 論 .........................................................................................................52 致 謝 ....................................................................................................... ...56 參考文獻(xiàn) ...................................................................................................57 2 9+2 裝配式鋼筋混凝土簡(jiǎn)支 T 型梁橋設(shè)計(jì)計(jì)算 摘 要 目前，混凝土被廣泛的使用于各種中小跨度的橋梁中，而且大量采用混凝土將是未來橋梁發(fā)展的趨勢(shì)。在確定方案時(shí)，根據(jù)調(diào)研及查閱大量的資料，在此橋位上布置了裝配式鋼筋混凝土簡(jiǎn)支 T 梁橋，拱橋， T 型剛構(gòu)橋三種設(shè)計(jì)方案，根據(jù)“安全、適用、經(jīng)濟(jì)、美觀”的原則，對(duì)各種橋型的優(yōu)缺點(diǎn)進(jìn)行了比選，而裝配式鋼筋混凝土簡(jiǎn)支 T 梁橋，在此橋位上更具有競(jìng)爭(zhēng)力，反映在工程造價(jià)比較低，施工工期短，施工技術(shù)成熟，因此，最終選擇了裝配式鋼筋混凝土簡(jiǎn)支 T 梁橋 為設(shè)計(jì)方案。所以， 設(shè)計(jì)的對(duì)象為一座 9+2 簡(jiǎn)支梁橋，橋梁平面位于直線段上，全長(zhǎng) 18米，寬度 10 米，設(shè)計(jì)荷載為公路 Ⅱ 級(jí)。主梁橫向由 5 片 T 梁組成，梁高均為 ，兩片梁之間設(shè)置 4cm 寬現(xiàn)澆濕接縫。本橋采用樁柱式橋墩，直徑 1m 的圓形截面墩柱及直徑 的圓形截面鉆孔灌注樁，樁基礎(chǔ)嵌入完整微風(fēng)化砂巖 以下；采用重力式 U 型橋臺(tái)，橋臺(tái)基礎(chǔ)為直徑 的鉆孔灌注樁基礎(chǔ)。 橋梁上部結(jié)構(gòu)手算進(jìn)行主梁內(nèi)力分析。橫向分布系數(shù)通過計(jì)算完成。內(nèi)力計(jì)算結(jié)果包括基本組合、長(zhǎng)期組合及短期組合作用下的彎矩圖、剪力 圖、最大應(yīng)力圖。根據(jù)內(nèi)力計(jì)算結(jié)果，對(duì)主梁進(jìn)行了承載能力及正常使用性能的驗(yàn)算。蓋梁承載能力驗(yàn)算及裂縫寬度驗(yàn)算與抗剪驗(yàn)算、墩柱承載力驗(yàn)算及裂縫寬度驗(yàn)算、樁基承載力驗(yàn)算及裂縫寬度驗(yàn)算均由 手算 計(jì)算完成 。 根據(jù)驗(yàn)算結(jié)果得出結(jié)論：設(shè)計(jì)的橋梁結(jié)構(gòu)是安全、 經(jīng)濟(jì) 、合理的，并滿足現(xiàn)行規(guī)范的要求。 關(guān)鍵詞：橋梁；荷載組合；內(nèi)力；驗(yàn)算；承載能力 3 Fabricated reinforced concrete simplysupported T bridge design calculation Abstract:Nowdays ,tstressed concrete is extensively used in various kinds of bridges with medium and small span,and it well be a development trend in future to adopt the bridges of stressed concrete in a large to the give three arch bridge,T type of steel and concrete simplysupporced T bridge for to safe, function, economy, beautiful pinnciple, advantages and disadvantages of various bridges then fabricated rainforced concrete simplysupposed T girder bridged in the petitive,reflected in project cost is lower,constuction period is short,construction technology is mature .Therefore,finally choose concrete simplysupporced T bridge for design. Therefore,it is a simply supported threespan girder bridge ( 9+2) i. The bridge is straight on the plane with18 metres in length and 10 meters in bridge is a part of a highway which the design load is HighwayIlevel. The main beam is made up of 5 Tbeams that are high and the adjacent beams are linked by pouring wet joint with 4cm in width between the two beams. Substructure is made up of circular section piers with a diameter of 1 and circular section bored pouring pile foundation with a diameter of m, the pilings of foundation are embedded into the intack moderately differentiated rock with a depth of . The concrete gravity abutment is high with a type of U and supported by pile foundation. Analysis of superstructure in the bridge be done by hand. Simply supported single Tbeam is used as analysis model in the program, only one edge beam is analysed and the mid beam using the same result in analyzing on safe side. Transverse distributing coefficient can be exported by using . The calculations include bending moment diagram, shear force diagram and maximum stress under basic/longterm/shortterm load bination. According to the calculations, checking of capacity and performance of normal use of the beam have been done. Checking of capacity/crack width/shear strength of bent cap, capacity /crack width of piers and piles are done . According to the calculation results, the bridge designed in this graduation project w