• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2012, Vol. 32 ›› Issue (4): 467-473.DOI: 10.3973/j.issn.1672-741X.2012.04.007

• 研究与探索 • 上一篇    下一篇

锦屏一级水电站地下厂房预应力锚杆张拉伸长值试验分析

张传红   

  1. (中国水利水电第十四工程局有限公司锦屏项目经理部, 四川 凉山 615603)
  • 收稿日期:2011-11-02 修回日期:2012-06-04 出版日期:2012-08-20 发布日期:2012-10-16
  • 作者简介:张传红(1980—),男,湖北应城人,2008年毕业于武汉大学电气工程及其自动化专业,专科,工程师,主要从事水利水电地下工程施工管理工作。

Analysis on Tensioning Length Test on Prestressed Rock Bolt in Construction  of Underground Powerhouse of Jinping I Hydropower Station

ZHANG Chuanhong   

  1. (Jinping Department of Sinohydro Bureau 14 Co., Ltd., Liangshan 615603, Sichuan, China)
  • Received:2011-11-02 Revised:2012-06-04 Online:2012-08-20 Published:2012-10-16

摘要: 锦屏水电工程预应力锚杆检验当中,实际张拉伸长值始终不能满足设计要求,为深入了解预应力锚杆实际伸长值变化规律,在加工车间和施工现场分别进行了自由段完全自由张拉试验和现场施工工艺张拉试验,前者锚杆体自由段处于最理想受拉状态,后者与实际施工工艺一致,试验过程中发现不同条件下锚杆伸长值变化规律复杂,并受施工工艺、锚杆材质、温度、张拉力等诸多因素影响。通过试验证明: 2类样品锚杆实际张拉伸长值均不能达到理论伸长值要求,但锁定拉力基本不受影响。因此,预应力锚杆张拉工序质量验收以控制张拉力为主,伸长值作参考能满足设计质量要求。

关键词: 锦屏一级水电站, 地下厂房, 预应力锚杆, 伸长值, 张拉试验

Abstract: In the test of prestressed rock bolt in construction of Jinping Hydropower Station, the actual tensioning length could not meet the requirements. Free tensioning test on the free rock bolt section is carried out in the workshop, and construction tensioning test is carried out in the site, so as to obtain the variation rules of the tensioning length of prestressed rock bolt. The tests showed that the variation rules of the tensioning length of the prestressed rock bolt are complicated under different conditions, and can be affected by construction technologies, rock bolt material, temperature and tensioning force. The tests proved that the tensioning lengths of the rock bolts tested can not meet the theoretical requirements, but the locking capacity of the rock bolts is almost unaffected. Therefore, the control of the tensioning force of the prestressed rock bolts is the key in the control of the tensioning quality of the rock bolts, and the tensioning length can be regarded as the reference value.

Key words: Jinping I Hydropower Station, underground powerhouse, prestressed rock bolt, tensioning length, tensioning test