【正文】 計(jì) 1． 主梁 結(jié)構(gòu) 。 二、普通鋼筋 設(shè)計(jì)采用 HRB33 R235 鋼筋， R235 鋼筋其質(zhì)量應(yīng)符合 的規(guī)定，HRB335 鋼筋其質(zhì)量應(yīng)符合 要求。 第二 節(jié) 主要材料及計(jì)算參數(shù) 一、混凝土 本橋處于溫?zé)岬貐^(qū)，屬于Ⅰ類環(huán)境；本橋使用的各種混凝土，應(yīng)進(jìn)行嚴(yán)格的質(zhì)量控制和檢測(cè)。 3． 地下水、土的腐蝕性 根據(jù)臨近場(chǎng)區(qū)的建筑經(jīng)驗(yàn)，場(chǎng)區(qū)內(nèi)地下水為 HCO3Ca2+型。根據(jù)鉆探資料，擬建道路沿線溝谷位置土層厚度較大，斜坡位置土層厚度小，下部基巖為泥巖和泥質(zhì)砂巖。 五、地震 根據(jù)鉆探成果和地區(qū)經(jīng)驗(yàn)，場(chǎng)區(qū)內(nèi)的素填土屬軟弱土，剪切波速建議取 130m/s；粉質(zhì)粘土剪切波速建議取 180m/s。強(qiáng)風(fēng)化泥質(zhì)泥巖厚 ～ ，巖質(zhì)較軟，巖芯破碎，巖芯多 呈碎塊狀、扁柱狀，力學(xué)性能差，有風(fēng)化裂隙發(fā)育。該層土石等級(jí)為Ⅱ級(jí)，土石類別為普通土。侏羅系中統(tǒng)沙溪廟組地層主要由泥質(zhì)砂巖和泥巖組成。；另一組傾向 300176?！?290176。 二、主要設(shè)計(jì)規(guī)范 1．《公路橋涵設(shè)計(jì)通用規(guī)范》（ JTG D60— 2020） 2．《公路鋼筋混凝土及預(yù)應(yīng)力混凝土橋涵設(shè)計(jì)規(guī)范》（ JTG D62— 2020） 3．《公路橋涵地基與基礎(chǔ)設(shè)計(jì)規(guī)范》（ JTG D63— 2020） 4．《公路橋梁抗震設(shè)計(jì)細(xì)則》（ JTG/T B02012020） 5．《公路橋涵施工技術(shù)規(guī)范》（ JTJ041－ 2020） 6．《公路圬工橋涵設(shè)計(jì)規(guī)范》（ JTG D612020） 7．《城市橋梁工程施工與質(zhì)量驗(yàn)收規(guī)范》（ CJJ 22020） 8．《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（ GB500102020） 2 第三節(jié) 地質(zhì)概況 一、地形地貌 長壽區(qū)地殼隆起成陸于一億三千萬年前，屬川東平行嶺谷弧形褶皺低山丘陵區(qū)。 關(guān)鍵詞：橋梁；荷載組合；內(nèi)力；驗(yàn)算；承載能力 1 Abstract The object in this graduation project is a simply supported threespan girder bridge ( 330m) in New Zone of Changshou North and straddles Taohua Stream. The bridge is straight on the plane with 100 metres in length and 32 meters in bridge is a part of a highway which the design load is HighwayIlevel. The main beam is made up of 14 Tbeams that are high and the adjacent beams are linked by pouring wet joint with 60cm in width between the two beams. Substructure is made up of circular section piers with a diameter of 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 using Midas Civil Trial 2020. 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 Dr bridge . 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 by Dr bridge . According to the calculation results, the bridge designed in this graduation project was safe, economical and reasonable, and it is qualified for the present bridge design specifications . Keywords:Bridge。 主梁橫向由 14 片 T 梁組成，梁高均為 ，兩片梁之間設(shè)置 60cm 寬現(xiàn)澆濕接縫。 橫向分布系數(shù)通過橋梁博士 計(jì)算完成。 Capacity 1 目錄 第一章 設(shè)計(jì)說明 ...................................................................................................................... 1 第一節(jié) 工程概況 ...................................................................................................................... 1 第二節(jié) 設(shè)計(jì)依據(jù)及規(guī)范 .......................................................................................................... 1 一、設(shè)計(jì)依據(jù) ........................................................................................................................ 1 二、主要設(shè)計(jì)規(guī)范 ................................................................................................................ 1 第三節(jié) 地質(zhì)概況 ...................................................................................................................... 2 一、地形地貌 ........................................................................................................................ 2 二、地質(zhì)構(gòu)造 ........................................................................................................................ 2 三、地層巖性 ........................................................................................................................ 2 四、不良地質(zhì)現(xiàn)象及主要工程地質(zhì)問題 ............................................................................ 3 五、地震 ................................................................................................................................ 3 六、水文地質(zhì)條件 ................................................................................................................ 4 第二章 設(shè)計(jì)計(jì)算 ...................................................................................................................... 6 第一節(jié) 采用的技術(shù)標(biāo)準(zhǔn)及參數(shù) .............................................................................................. 6 第二節(jié) 主要材料及計(jì)算參數(shù) .................................................................................................. 6 一、混凝土 ............................................................................................................................ 6 二、普通鋼筋 ........................................................................................................................ 7 三、預(yù)應(yīng)力鋼材 .................................................................................................................... 7 四、預(yù)應(yīng)力錨具及管道 ........................................................................................................ 8 第三節(jié) 主要結(jié)構(gòu)設(shè)計(jì) .............................................................................................................. 8 第四節(jié) 主梁結(jié)構(gòu)驗(yàn)算 .............................................................................................................. 9 一、計(jì)算模型與恒載取值 .................................................................................................... 9 二、主梁內(nèi)力計(jì)算及驗(yàn)算 .................................................................................................. 11 （一）橫向分布系數(shù)計(jì)算 ............................................................................................. 11 （二）選擇控制截面 ..................................................................................................... 12 （三）計(jì)算結(jié)果（ 1 號(hào)梁） .......................................................................................... 12 （四）主梁截面驗(yàn)算 ...