山口岩拱坝施工期162.5 m高程裂缝成因分析

Analysis on the causes of cracks in 162.5 m elevation during construction period of Shankouyan arch dam

山口岩拱坝施工期间,162.5 m高程层面出现大量裂缝,拱坝开裂将对结构安全带来危害.本文采用三维有限元仿真分析方法,对山口岩拱坝在不同工况下的温度场和应力场进行模拟计算,分析162.5 m高程层面裂缝产生的原因.结果表明:洪水漫顶、入仓温度过高、未通水冷却、未采取有效的仓面隔热措施这几个因素共同导致了裂缝的产生.

162.5 m elevation appears a large number of cracks during construction period of Shankouyan arch dam,dam cracking will harm the structural safety. In this paper,the temperature field and stress field of Shankouyan arch dam under different working conditions are simulated using three-dimensional finite element simulation analysis method,the causes of cracks in 162. 5 m elevation are analyzed. The results show that flood overtopping,high placing temperature,no water cooling,not taking effective warehouse insulation measures together leads to cracks.