摘要
结合具体工程建立受损玻璃钢夹砂管段三维有限元模型分析表明,当局部回填土不密实程度由0(密实)变为100%(掏空)时,管道竖向位移最大值由0.043 m增加到0.099 m,增幅达130%;在不密实程度为50%时,其最大环向应力接近极限抗拉强度值,在不密实程度为100%时,超过极限抗拉强度19.30%。所以,严格控制回填质量是减小管道破坏风险的重要因素。
A three dimensional finite element model of a damaged fiberglass reinforced plastic mortar(FRPM)pipe section is constructed to study the effect of incompactness of backfill soil on the stress state of the pipe.The results show that when the incompactness of the local backfill soil increases from 0(dense)to 100%(empty),the maximum vertical displacement of the pipe increases from 0.043 m to 0.099 m with an increase of 130%.When the degree of incompactness is 50%,the maximum circumferential stress of the pipe is close to the ultimate tensile strength.When the degree of incompactness is 100%,the maximum circumferential stress of the pipe exceeds the ultimate tensile strength by 19.30%.Thus,strict control of the backfill quality is important for the reduction of the pipe damage risk.
作者
李爽
曹生荣
杨李川
LI Shuang;CAO Shengrong;YANG Lichuan(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)
出处
《水电与新能源》
2022年第4期32-35,40,共5页
Hydropower and New Energy
关键词
FRPM管
回填土不密实
受力状态
有限元分析
FRPM pipe
incompactness of backfill soil
stress state
finite element analysis
