陆水水利枢纽溢流坝段闸墩裂缝成因分析及加固措施

Analysis on Cracking of Spillway Pier of Lushui Hydroporoject & Strengthening Measures

采用三维有限元法对陆水蒲圻宽缝重力坝闸墩尾墩纵缝下端出现的裂缝进行了分析计算。利用混凝土单元的开裂特性来模拟闸墩的开裂,结果表明裂缝是由温度荷载、水荷载及坝体本身自重的共同作用造成的,在现有荷载状况下,闸墩裂缝有进一步发展的趋势。因此提出了粘贴钢板的加固处理措施,结果表明能有效控制混凝土的进一步开裂;同时对钢板的布置进行了优化分析,得出加固处理优化方案。

The cracking of spillway piers of Lushui hydroproject is analyzed by 3-D FEM,the result shows that the cracks are caused by the synthetic action of water pressure,gravity and thermal stresses,and will be further extended.The piers will be strengthened by means of sticking steel plate on their surfaces,the optimal arrangement of the steel plate is suggested.