Coupling between reduction of force in prestressed anchor cable and rock#br#
creep in deep-buried underground powerhouse
WANG Kezhong1，WU Hui1，ZHAO Yufei2
(1. School of Civil Engineering and Architecture，Zhejiang University of Technology，Hangzhou，Zhejiang 310014，China；
2. Department of Geotechnical Engineering，China Institute Resources and Hydropower Research，Beijing 100048，China)
Abstract：The tension of an anchor cable in deep underground caverns is affected by many factors，such as the creep of rock mass，the water and the chemical erosion. The interaction between the rock mass and the anchor cable is complex and the reduction rate of prestress cannot be accurately defined. The relationship between the anchor stress and main parameters of rock creep was determined according the coupling theory of force reduction of prestressed anchor cable with rock creep. The difference and similarity between the monitored data and theoretical value of prestressed anchor cable in large underground powerhouse were compared and the causes of the differences were analyzed with numerical simulation. The initial stress state of rock mass and the deformation difference of surrounding rock at different positions were not considered in the theoretical calculation model, which is the main reason of the error of calculated results. An optimization scheme of the initial tension of the anchor cable was proposed.
王克忠1，吴 慧1，赵宇飞2. 深部地下厂房锚索预应力损失与岩体蠕变耦合分析[J]. 岩石力学与工程学报, 2018, 37(6): 1481-1488.
WANG Kezhong1，WU Hui1，ZHAO Yufei2. Coupling between reduction of force in prestressed anchor cable and rock#br#
creep in deep-buried underground powerhouse. , 2018, 37(6): 1481-1488.
ZHANG P，LONG Y C，LUO B. Prestressed tensioning method and its application to testing anchor stress of anchor cables for side-slope stabilization[J]. Chinese Journal of Rock Mechanics and Engineering，2017，16(1)：38-50.
[6]
高大水，曾 勇. 三峡永久船闸高边坡锚索预应力状态监测分析[J]. 岩石力学与工程学报，2001，20(5)：653-656.(GAO Dashui，ZENG Yong. Monitoring analysis on prestress state of anchor cable of high slope of the TGP permanent shiplocks[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(5)：653-656.(in Chinese))
[8]
LIU X M，CHEN C X，ZHENG Y. Optimum arrangement of cables in rock anchorage[J]. Procedia Earth and Planetary Science，2012，5(1)：76-82.
[10]
XU H F，WANG F J，CHENG X X. Pullout creep properties of grouted soil anchors[J]. Journal of Central South University of Technology，2007，14(Supp.1)：474-477.
[12]
陈安敏，顾金才，沈 俊，等. 软岩加固中锚索张拉吨位随时间变化规律的模型试验研究[J]. 岩石力学与工程学报，2002，21(2)：251-256.(CHEN Anmin，GU Jincai，SHEN Jun，et al. Model testing research on the variation of tension force of anchor cable with time in reinforcement of soft rock[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：251-256.(in Chinese))
[7]
张发明，刘 宁，陈祖煜，等. 影响大吨位预应力长锚索锚固力损失的因素分析[J]. 岩土力学，2003，24(2)：194-197.(ZHANG Faming，LIU Ning，CHEN Zuyu，et al. Analysis of factors affected on load losses of high capacity and long rock anchors[J]. Rock and Soil Mechanics，2003，24(2)：194-197.(in Chinese))
[4]
李英勇，王梦恕，张顶立，等. 锚索预应力变化影响因素及模型研究[J]. 岩石力学与工程学报，2008，27(增1)：3 140-3 146.(LI Yingyong，WANG Mengshu，ZHANG Dingli，et al. Study on influential factors and model for variation of anchor cable prestress[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.1)：3 140-3 146.(in Chinese))
[14]
朱晗迓，尚岳全，陆锡铭，等. 锚索预应力长期损失与坡体蠕变耦合分析[J]. 岩土工程学报，2005，27(4)：464-467.(ZHU Hanya，SHANG Yuequan，LU Ximing，et al. Coupling analysis of long-term prestress loss and slope creep[J]. Chinese Journal of Geotechnical Engineering，2005，27(4)：464-467.(in Chinese))
[16]
范广勤. 岩土工程流变力学[M]. 北京：煤炭工业出版社，1993：36-40.(FAN Guangqin. Rheological mechanics of rock engineering[M]. Beijing：Coal Industry Press，1993：36-40.(in Chinese))
[1]
DANZIGER F A B，DANZIGER B R，PACHECO M P. The simultaneous use of piles and prestressed anchors in foundation design[J]. Engineering Geology，2006，87(3)：163-177.
[3]
韩 光，朱训国，王大国. 锚索预应力损失的影响因素分析及其补偿措施[J]. 辽宁工程技术大学学报，2008，27(2)：176-179.(HAN Guang，ZHU Xunguo，WANG Daguo. Analysis of factors affecting pre-stressing loss in pre-stressing cable anchor and compensative measures[J]. Journal of Liaoning Technical University，2008，27(2)：176-179.(in Chinese))
[5]
陈沅江，伊 进，胡毅夫. 软岩边坡锚索预应力定量损失规律研究[J]. 岩石力学与工程学报，2013，32(8)：1 685-1 691.(CHEN Yuanjiang，YI Jin，HU Yifu. Research on prestress quantitative loss law of soft rock slope anchor cable[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(8)：1 685-1 691.(in Chinese))
[11]
LI W J，HAN Y H，WANG T，et al. DEM micromechanical modeling and laboratory experiment on creep behavior of salt rock[J]. Journal of Natural Gas Science and Engineering，2017，46(3)：38-46.
[15]
JING F，LI W S，CHEN C H，et al. Load distribution in inner anchor segment of prestressed cable with time[C]// QIAN Q，ZHOU Y，ed. Proceedings of the 12th ISRM International Congress on Rock Mechanics. Beijing：CRC Press，2012：1 521-1 526.
[9]
张向东，李永靖，张树光，等. 软岩蠕变理论及其工程应用[J]. 岩石力学与工程学报，2004，23(10)：1 635-1 639.(ZHANG Xiangdong，LI Yongjing，ZHANG Shuguang，et al. Creep theory of soft rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(10)：1 635-1 639.(in Chinese))
[13]
王清标，张 聪，王 辉，等. 预应力锚索锚固力损失与岩土体蠕变耦合效应研究[J]. 岩土力学，2014，35(8)：2 150-2 156.(WANG Qingbiao，ZHANG Cong，WANG Hui，et al. Study of coupon effect between anchorage force loss of prestressed anchor cable and rock and soil creep[J]. Rock and Soil Mechanics，2014，35(8)：2 150-2 156.(in Chinese))
2018, Vol. 37 
