第一章  工程简述

1.1、工程简介
本工程名称为佛山和顺至北滘公路主干线工程DS-14标段，桩号为k24+850--k28+180,路线全长3.33km，大致呈南北走向，本工程沿线多平原，间有残积丘陵，区内横跨道路、水道较多。主要工程数量包括：路基土石方约139万立方米，袋装砂井25333米，涵洞3座，共计292横延米，管道工程11928米。特大桥一座为跨南盐公路桥，全长590米，主桥为30+45+30米的连续预应力箱梁，单箱三室，梁高2.3米，引桥为20米先张法预应力砼空心板梁，预应力空心板板梁设计数量为828片。汽车通道一座，人行天桥一座。全桥均为钻孔桩基础，桩基进入弱风不低于两米，其中Ф800mm共计348米， Ф1200mm共计1427米，Ф1600mm共计3675米。重点难点工程为跨南盐公路桥。
1.2、设计主要技术标准
道路等级：主路为一级公路兼城市快速路，辅路为城市主干路。
主路的计算行车速度为100Km/和，辅路的计算行车速度为50Km/。
路基宽度：79m。
地震烈度：按7度设防。
1.3、气候气象
本工程所属区域为亚热带季风海洋气候，气候湿润，雨量充沛。年平均气温21.8oC左右，极端最低气温0oC，受台风影响较大，台风常伴随大雨或暴雨出现。
1.4、地质状况
沿线覆盖层主要有亚粘土、粉细砂、淤泥、淤泥质土、中砂构成。
Chapter Project Description

1.1, Project Description
The project name is cis to Beijiao Foshan Highway Route DS-14 main sections, the Stake for the k24 +850--k28 +180, total length 3.33km, was roughly north-south, along the plains of this project, there are between residual hills, the area across the road, waterway more. Number of major projects including: earthwork embankment at about 1.39 million cubic meters, 25,333 meters of Sand Wick, culvert 3, a total of 292 cross-running meters, 11,928 meters pipeline project. Bridge a road bridge to cross the South Salt length 590 meters, the main bridge is 30 +45 +30 m continuous prestressed box girder, single box three rooms, 2.3 meters high beams, approach bridge is 20 meters in the first and Prestressed Concrete hollow beam, the number of prestressed hollow plate beam design for the 828. Auto Channel 1, a pedestrian bridge. Full-bridge are bored pile foundation, pile into the weak wind of not less than two meters, which Ф800mm total 348 m, Ф1200mm total of 1427 meters, Ф1600mm total of 3675 meters. Key and difficult project as a road bridge across the South of salt.
1.2, Design Technical Standards
Road rating: Main Road, as a highway and expressway, bypass roads for urban trunk road.
The running speed of the main road to 100Km /, and, side roads to the calculation speed 50Km /.
Roadbed width: 79m.
Earthquake intensity: 7 degrees by fortification.
1.3, Climate Meteorology
The project area belongs to subtropical monsoon maritime climate, humid climate and abundant rainfall. The annual average temperature 21.8oC about the extreme minimum temperature 0oC, influenced by the typhoon, typhoon or heavy rain occurs often with heavy rain.
1.4, geological conditions
Main overburden along the sandy clay, silty sand, silt, silty soil, in sand form.