Abstract: Through analysis of the reasons leading to the base fraine beam crack of the arch above complex arch bridge, the production of the initial crack and the crack expansion under the constant load and the addtional load are studied.The restoration plan and improvement setps in the design are put forward,and the problems overlooked in the design and previous construction can be overcome.The measures of the restoration of the crack are reasonable and economical.

摘要： 针对空腹拱桥底座梁裂缝产生的原因 ,分析归纳、研究了恒载作用下的初始裂缝的产生 ,加载后裂缝的扩展 ,提出修复方案、设计规范改进措施 ,克服设计和前期施工中忽略的问题 .修复裂缝得当 ,价格低廉 ,经济合理 .

关键词: 裂缝分析, 修复措施, 设计改进