水力发电2017，Vol.43Issue(9)：45-48,4.
水工隧洞混凝土衬砌裂缝监测与成因分析
Monitoring and Cause Analysis of Concrete Lining Cracking in Hydraulic Tunnel
田振华 1李宝石 2王经臣3
作者信息
- 1. 中国水利水电科学研究院,北京100048
- 2. 北京中水科工程总公司,北京100048
- 3. 辽宁省水资源管理集团有限责任公司,辽宁 沈阳 110003
- 折叠
摘要
Abstract
For studying the cracking of thin-wall lining concrete structure,the concrete lining crack automatic monitoring system of a hydraulic tunnel is designed,which is able to real-time monitor the stress,strain,temperature,crack opening of concrete.The monitoring resuhs show that the lining has penetrated cracks within one month after the completion of pouring,and the cracks are distributed from arch to side walls,even to whole tunnel section,but the crack opening is small and there is no obvious enlarging trend.From the analysis of monitoring data,it is found that the heat dissipation of thin-wall concrete is faster,the temperature drop gradient of concrete is larger and the internal temperature stress of concrete is higher.As lining concrete surface curing is not carried out,the dry shrinkage of surface concrete further promote the development of cracking in internal concrete.After the cracking,the stress in lining concrete will be re-distributed,so the cracks will not further develop.关键词
隧洞/混凝土衬砌/裂缝/安全监测Key words
tunnel/concrete lining/crack/safety monitoring分类
建筑与水利引用本文复制引用
田振华,李宝石,王经臣..水工隧洞混凝土衬砌裂缝监测与成因分析[J].水力发电,2017,43(9):45-48,4.
