万家寨引黄工程总干线三级泵站弦式应变计预埋故障分析

Analysis of Embeded String Strain Me ter' s Breakdown Tian Runxian

观测仪器预埋在混凝土后,其事故发生的概率尽管很小,但其发生将无法使安全监测等工作顺利进行。本文分析总干线三级泵站弦式应变计施工后无法读测的原因,供以后解决类似问题参考。

In horizontal outlet tunnel,Pompin g station No.3,the general main line,Wanjiazhai YRDP(Yellow River Diversion Project),four of the string strain meters had b een embeded on July 30,2000.Howecver,since November 27,2000,the breakdown had been discovered one after another,t he strings' frequency of vibration readings had not been able to be taken.In this p aper the cause of the breakdown is analyzed.The writers hold that the pos-sibility that the temperature cause d the breakdown of the string strain meters can not be ruled out.