摘要
广州市南沙区凤凰三桥主桥为(40+61+308+61+40)m中承式无推力提篮式钢箱系杆拱桥,钢箱拱肋最大截面尺寸为3.0m×6.0m,主拱肋按1/5角度横桥向内倾。针对该桥结构特点和桥址处的地质、环境条件,结合钢箱拱肋施工经验,提出缆索吊机分段吊装和整体提升钢箱拱肋2种方案,从工期、设备设施投入、经济合理性、安全性、对通航影响、质量控制以及对周围环境生态的影响6个方面进行比较,整体提升方案均较缆索吊机方案有较大优势,因此选择整体提升方案。
The main bridge of the Third Fenghuang Bridge in Nansha District, Guangzhou, is a half-through basket-handle steel box tied arch bridge with span arrangement of （40 ＋ 61 ＋ 308 ＋ 61 ＋40） m. The arch is not constrained by thrust. The largest cross section of the steel box arch rib measures 3. 0 mX 6. 0 m, and the main arch ribs incline inwardly along the bridge width at an angle of 1/5. Given the structural characteristics of the bridge and the geological and environmen-tal conditions at the bridge site, two schemes of sectional lifting and installation by the cable crane and monolithically lifting the steel box arch ribs were proposed, taking into consideration of the experiences of steel box arch rib construction. The two schemes were compared from aspects of construction time and facilities applied, economic rationality, safety, influence on the naviga-tion, quality control and influence on the surrounding ecological conditions, and the monolithic lifting scheme was proved superior to the cable crane scheme, and therefore, was chosen as the fi-nal option.
出处
《世界桥梁》
北大核心
2017年第4期15-19,25,共6页
World Bridges
关键词
系杆拱桥
钢箱拱肋
缆索吊
整体提升
方案比选
桥梁施工
tied arch bridge
steel box arch rib
cable crane
monolithic lifting
scheme com-parison
bridge construction
