水利水电技术2017，Vol.48Issue(7)：59-63,5.DOI:10.13928/j.cnki.wrahe.2017.07.010
无粘结环锚预应力衬砌锚具槽布置方式对比研究
Comparative study on layout patterns of anchorage slots for pre-stressed lining with unbonded circular anchored tendons
摘要
Abstract
The slots of pre-stressed lining anchorage with unbonded circular anchored tendons are the key forced parts for entire pre-stressed lining,and then the selection of their locations is quite important for the forced status and safety of entire pre-stressed lining.Combined with the unbounded pre-stressed lining structure of the pressure water conveyance tunnel for Songhuajiang River Diversion Water Supply Project,the forced statuses of the key parts of the lining with single-row layout and double-row layout of anchorage slots are analyzed with Flac3D modeling carried out by combining equivalent load method with solid modeling method.The calculation result shows that:(1) the absence and ununiform distribution of the local pre-stress are there at the lower halfring of the pre-stressed lining with unbonded circular anchored tendons due to the influence from anchorage slot,whereas,the ununiformity of the lining pre-stress can be reduced by the single-row layout of the anchorage slots;(2) both the anchorage slots and the areas near them are the weak locations for the pre-stressed lining and the lining tensile stress areas are mainly distributed near the circular free face of the anchorage slot,while the maximum forced areas of lining are distributed in between adjacent anchorage slots;(3) the anti-overload capacity of the double-row layout of anchorage slots is better than that of the single-row layout of anchorage slots.关键词
预应力衬砌/无粘结环锚/锚具槽/有压隧洞/数值计算Key words
pre-stressed lining/unbonded circular anchored tendons/anchorage slot/pressure tunnel/numerical calculation分类
建筑与水利引用本文复制引用
曹瑞琅,王玉杰,皮进,郑理峰,刘立鹏..无粘结环锚预应力衬砌锚具槽布置方式对比研究[J].水利水电技术,2017,48(7):59-63,5.基金项目
国家重点研发计划课题(2016YFC0401801,2016YFC0401804) （2016YFC0401801,2016YFC0401804）
中国水利水电科学研究院基本科研业务费专项项目(GE0145B452016,GE0145B822017) （GE0145B452016,GE0145B822017）
