万家沟拱坝除险加固方案研究

Study on Wanjiagou Arch Dam Reinforcement Scheme

万家沟水库挡水坝为混凝土双曲拱坝,水库于1997年建成,运行近20年,存在诸多不安全隐患。2009年被鉴定为三类病险坝。通过对万家沟拱坝坝体应力的复核及除险加固方案的研究,明确了大坝存在坝体拉应力超标等问题,提出了解决问题的方案,研究了坝体3个加固的方案(恢复保温层、重力坝加固、拱坝加固),综合比选后,推荐采用拱坝加固处理方案。

The barrage of Wanjiagou reservoir is a concrete double curvature arch dam.The reservoir was built in 1997 and has been running for nearly 20 years,there are many hidden dangers.It was identified as Class Ⅲ dangerous dam in 2009.This text defines the problem of excess of tensile stress of the dam body,puts forward the scheme for solving this problem,and studies 3 dam reinforcement schemes(insulation layer restoration,gravity dam reinforcement,arch dam reinforcement) through reviewing the dam body stress of Wanjiagou arch dam and studying the reinforcement scheme.After comprehensive comparison,it is recommended to adopt the arch dam reinforcement scheme.