水电站地下埋管回填脱空影响计算分析  

The Calculation and Analysis of the Effect of Backfill Cavity of the Underground Buried Pipe in Hydropower Stations

作　　者：申艳[1] 冯浩文 黄永松 SHEN Yan;FENG Hao-wen;HUANG Yong-song(North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学,北京102206

出　　处：《中国农村水利水电》2021年第8期173-179,共7页China Rural Water and Hydropower

摘　　要：水电站地下埋管回填脱空的范围及深度,是埋管是否需要进行补充灌浆的重要参考依据。采用三维非线性有限单元法,选取了某工程具有代表性的管道,对钢管结构受力情况进行脱空范围和深度两方面的敏感性计算,将计算结果与材料的抗力限值进行对比分析,研究得出管道允许的脱空范围和深度,科学评价回填脱空范围及深度对钢管结构受力的影响。Backfill empty phenomenon maybe happen after backfilling for underground penstocks of hydropower stations.The empty range and depth are important references for whether the underground penstocks need supplementary grouting.This paper selects representative pipelines of a certain project,and uses the three-dimensional non-linear finite element method to calculate the sensitivity of their stress conditions in terms of empty range and depth.Then the calculated results are compared with the resistance limit of the material to obtain the allowable empty range and depth of the steel pipe,and the impact of the backfill empty range and depth on the force of the steel pipe structure are scientifically evaluated.

关 键 词：地下埋管 脱空 接触灌浆 非线性有限元 ANSYS 

分 类 号：TV732.41[水利工程—水利水电工程]