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 Technology 1.1 橋面鋪裝 橋面鋪裝的作用 （1）保護行車道板 （2）防止雨水侵入結(jié)

2、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 Engineeri

3、ng, School of Transportation, Wuhan University of Technology 1.1 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：橋面鋪裝，講解結(jié)束

4、 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 Technology Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology 1.2 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 參考公路排水設(shè)計規(guī)

5、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 Engineeri

6、ng, 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 Technology

7、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 Technology Dept of Road & Bridge En

8、gineering, School of Transportation, Wuhan University of Technology 1.3 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）鍍鋅鐵皮伸縮

9、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 Transportation, Wu

10、han 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 Engineering, S

11、chool 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, Wuh

12、an 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 Univ

13、ersity of Technology Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of Technology 1.4 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 Technology 1.4 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 Technology 1.4 人行道、欄桿與燈柱 欄桿圖示 Dept of Road & Bridge Engineering, School of Transportation, Wuhan University of T