昆山市地处太湖湖东水网圩区,桥梁工程面广量大。当前常用的桥型为板梁桥和桁架拱桥.就这两种型式的桥梁使用效果看,板梁桥受力明确,牢固耐用,但造价较高;桁架拱桥投资虽省,但常因温度应力和桥台位移等影响或下弦杆件受船只的撞击而成为危桥,增加了维修费用。为 Kunshan City is located in Taihu Lake East River polder area, a large number of large bridge project. Currently used bridge girder bridge and truss arch bridge.Because of these two types of bridge use effect, the girder bridge clear stress, strong and durable, but higher cost; truss arch bridge investment is provincial, but often due to temperature stress And abutment displacement or the impact of the lower chord member by the impact of the ship and become a dangerous bridge, an increase of maintenance costs. for