1) period of first impounding
首次蓄水期
1.
The operational behaviors of Laxiwa arch dam and foundation in the period of first impounding are studied.
首次蓄水期是建筑物重要而敏感的阶段,也是验证建筑物是否满足设计要求的阶段。
3) the first impoundment
初次蓄水期
1.
This paper presents that during the first impoundment of Ertan reservoir in May 1998,mathematic relationship between the loads acting on the dam & the respondent displacements was established by use of statistic model & determined model theoretic analysis method based on the observation results of the plumblines installed in the dam & monitoring network surveying results.
简要介绍了在二滩拱坝1998年5月初次蓄水期,通过拱坝垂线和监测网系统,用统计模型和确定性模型理论分析方法,建立了施加于坝体各作用量与坝体受作用后的效应量(变位)间的数学关系;并根据预先计算分析成果,提出了在初次蓄水运行中拱坝变位的参考预报值,实时对二滩拱坝实际工作状态作出安全评判。
4) second impoundment
二次蓄水
5) initial impounding
初次蓄水
1.
The control value of initial impounding velocity is proposed.
应用三维非稳定饱和—非饱和渗流有限元法建立冲久水库枢纽区的三维有限元模型,分析了枢纽区渗流场的特性并比较不同蓄水速度下坝体的非稳定渗流特性,推荐了初次蓄水速度的控制值。
6) inspection threshold
首次检查期
1.
This paper treats of the detectability of the repaired aircraft structures and the methods of how to determine the inspection threshold and inspection intervals of the repaired structures.
论述了飞机结构损伤部位修理后的可检查性以及如何确定损伤结构修理后的首次检查期和检查周期；同时，也论述了改善修理部位耐久性的常用方法。
补充资料：首次
1.第一次;头一回。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条