白坭河大桥施工组织设计.doc

白坭河大桥施工组织设计.doc

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1.工程概况

1.1项目位置及规模

本项目为广清高速公路与广州环城高速公路连接线白坭河大桥，包括两座桥：

（一）GF（广州至佛山）匝道白坭河大桥，K0+126.096~K0+550.096，桥梁全长424m，桥梁全宽11.5m；

（二）FQ（佛山至清远）匝道白坭河大桥，K0+157.932~K0+581.932，桥梁全长424m，桥梁全宽9.5m；

项目工期为8个月。

1.2结构形式、特点及要求

GF匝道白坭河大桥跨径组合为（40+4×50+40+32）mT梁+7×16m空心板；FQ匝道白坭河大桥跨径组合为7×16m空心板+（32+40+4×50+40）mT梁。

桥梁基础为钻孔灌注桩，类型有D180cm、160cm、120cm三种，桥墩均采用双柱式桥墩，与旧桥一致。

GF匝道桥T梁采用D160cm柱配D180cm桩、空心板梁采用D100cm柱配D120cm桩；GF匝道桥T梁采用D140cm柱配D160cm桩、空心板梁采用D100cm柱配D120cm桩。

主要技术指标如下表：

主要技术指标表

序号

项目名称

技术指标

1

设计荷载

汽车—超20级，挂车—120

2

桥面宽度

GF匝道11.5m，FQ匝道9.5m

3

设计洪水频率

1/100

4

通航标准

通航净宽2×40m、通航净高10m、最高通航水位6.8m

5

地震基本烈度

Ⅵ度，按Ⅶ度设防

6

设计行车速度

40km/h

7

最小半径

1487.5m

8

最大纵坡

2.43%

1.3工程数量及材料数量

工程数量及材料数量表

序号

工程细目名称

单位

数量

1

钻孔桩基础

长度D180cm/160cm/120cm

m

486.8/409.5/827

Ⅰ级钢筋/Ⅱ级钢筋

kg

41003/200513

2

系梁

C25砼

m3

175

Ⅰ级钢筋/Ⅱ级钢筋

kg

3126/8718

3

墩柱

C30砼

m3

699

Ⅰ级钢筋/Ⅱ级钢筋

kg

12151/81551

4

盖梁

C25砼

m3

733

Ⅰ级钢筋/Ⅱ级钢筋

kg

491/84981

5

台身及台帽

C30砼

m3

89

Ⅰ级钢筋/Ⅱ级钢筋

kg

189/6963

6

搭板及枕梁

C30砼

m3

60

Ⅰ级钢筋/Ⅱ级钢筋

kg

130/10292

7

支座垫石

C40砼

m3

6

Ⅰ级钢筋

kg

2397

8

16m钢筋砼空心板梁

片

91

9

T梁（32m/40m/50m）

片

9/18/36

10

加速车道/减速车道

m

236.382/136.082

1.4自然条件及气象情况

本区位于南亚热带季风气候区，春季风和日丽，夏炎冬暖，降水丰沛，日照充足，4~8月气候炎热，降水量大，多偏南风；时年9月至翌年3月气候干燥，降水较少，多偏北风。

每年5~10月多热带气旋，中心最大风力达12级，甚至以上，形成台风，侵袭广州。

年平均气温为21.9℃，极端最高气温38.7℃，最低气温0℃；年平均降雨量1696mm，最大降雨量2864.7mm，最小降雨量1113.2mm。

1.5地形、地貌及地质、水文情况

桥位地处珠江三角洲冲积平原，地形平坦，桥位横跨白