橋梁工程PPT(姚林森第二版)第2篇第2章

1、第二篇 鋼筋混凝土和預(yù)應(yīng)力混凝土簡支梁橋第2章 橋面構(gòu)造Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology本章內(nèi)容 1.1 橋面鋪裝 1.2 橋面排水設(shè)施 1.3 橋面伸縮縫 1.4 人行道、欄桿與燈柱Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology1.1 橋面鋪裝橋面鋪裝的作用 （1）保護行車道板 （2）防止雨水侵

2、入結(jié)構(gòu)構(gòu)件 （3）分散車輛輪重的集中荷載對橋面鋪裝的要求： （1）行車舒適 （2）抗車轍 （3）抗滑 （4）剛度好 （5）不透水 Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology知識點：橋面鋪裝，開始講解這個知識點1.1 橋面鋪裝橋面鋪裝的類型 （1）普通水泥混凝土或瀝青混凝土鋪裝 （2）防水混凝土鋪裝 （3）具有貼式防水層的普通水泥混凝土 或瀝青混凝土鋪裝 現(xiàn)在趨向于采用高性能瀝青混凝土鋪裝。 Dept of Road & Bridge Eng

3、ineering, School of Transportation, Wuhan University of Technology1.1 橋面鋪裝橋面橫坡的設(shè)置 （1）構(gòu)造找坡 Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology（2）結(jié)構(gòu)找坡1.1 橋面鋪裝Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology知識點：橋

4、面鋪裝，講解結(jié)束本章內(nèi)容 1.1 橋面鋪裝 1.2 橋面排水設(shè)施 1.3 橋面伸縮縫 1.4 人行道、欄桿與燈柱Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of TechnologyDept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology1.2 橋面排水設(shè)施n 為防止雨水長時間滯留橋面，侵蝕結(jié)構(gòu)構(gòu)件，降低橋梁的耐久性，應(yīng)將雨水盡快排出橋外。n

5、參考公路排水設(shè)計規(guī)范（JTJ018-97）n 7.1.3. 橋面應(yīng)有足夠的橫向和縱向坡度，使落在橋面上的降水迅速排向橋面行車道兩側(cè)。橋面橫坡可按路面橫坡取用或比后者大0.5% 。n 7.1.4. 泄水口宜設(shè)置在橋面行車道邊緣處。泄水口的間距可依據(jù)設(shè)計徑流量按本規(guī)范8.2節(jié)所述的方法計算確定，但最大間距不宜超過20m。橋梁伸縮縫的上游方向應(yīng)增設(shè)泄水口，在凹形豎曲線的最低點及前后35m處也應(yīng)各設(shè)置一個泄水口。n 7.1.5. 泄水口可采用圓形或矩形。圓形泄水口的直徑宜為15cm 20cm；矩形泄水口宜為（2030cm)x(3040cm)。Dept of Road & Bridge Engi

6、neering, School of Transportation, Wuhan University of Technology知識點：橋面排水設(shè)施，開始講解這個知識點1.2 橋面排水設(shè)施Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology 人行道下泄水管布置圖示1.2 橋面排水設(shè)施Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Tec

7、hnology 泄水管構(gòu)造圖1.2 橋面排水設(shè)施橫向排水管道構(gòu)造Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology知識點：橋面排水設(shè)施，講解結(jié)束本章內(nèi)容 1.1 橋面鋪裝 1.2 橋面排水設(shè)施 1.3 橋面伸縮縫 1.4 人行道、欄桿與燈柱Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of TechnologyDept of Road &a

8、mp; Bridge Engineering, School of Transportation, Wuhan University of Technology1.3 橋面伸縮縫 為保證橋跨結(jié)構(gòu)在氣溫變化、活載作用、混凝土收縮與徐變等影響因素下按受力圖式自由變形，需要在適當(dāng)位置設(shè)置伸縮縫。固定支座處滑動支座處伸縮縫簡支梁A簡支梁Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology伸縮縫伸縮縫的定義知識點：橋面伸縮縫，開始講解這個知識點 橋面伸縮縫類型 （1）

9、鍍鋅鐵皮伸縮縫1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology（2）跨搭鋼板式伸縮縫1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology （3）橡膠伸縮縫1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transpo

10、rtation, Wuhan University of Technology（4）其它形式伸縮縫1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology 橋面伸縮縫的布置 （1）伸縮縫受各種因素作用，很容易損壞，圖示為孝感八一大橋伸縮縫受損情況。（2）為了減少伸縮縫的維護工作量， 現(xiàn)在傾向于盡量減少伸縮縫的數(shù)量。如在簡支梁橋中采用橋面連續(xù)或先簡支后連續(xù)的做法。1.3 橋面伸縮縫Dept of Road & Bridge Enginee

11、ring, School of Transportation, Wuhan University of Technology 橋橋面面連連續(xù)續(xù)的的做做法法伸縮縫伸縮縫簡支梁橋面連續(xù)1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology先簡支連續(xù)的做法先簡支連續(xù)的做法伸縮縫臨時支座簡支梁1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan

12、University of Technology先簡支連續(xù)的做法先簡支連續(xù)的做法伸縮縫現(xiàn)澆接縫連續(xù)梁永久支座1.3 橋面伸縮縫Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology知識點：橋面伸縮縫，講解結(jié)束本章內(nèi)容 1.1 橋面鋪裝 1.2 橋面排水設(shè)施 1.3 橋面伸縮縫 1.4 人行道、欄桿與燈柱Dept of Road & Bridge Engineering, School of Transportation, Wuhan Universit

13、y of TechnologyDept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology1.4 人行道、欄桿與燈柱 一般人行道構(gòu)造圖Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology知識點：人行道、欄桿與燈柱，開始講解這個知識點 1.4 人行道、欄桿與燈柱裝配式人行道構(gòu)造圖Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology1.4 人行道、欄桿與燈柱具有高路緣的人行道構(gòu)造圖Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology1.4 人行道、欄桿與燈柱欄桿圖示Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Tech