深部地下厂房锚索预应力损失与岩体蠕变耦合分析

doi:10.13722/j.cnki.jrme.2017.1483

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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.

Key words： rock mechanics deep-buried underground powerhouse prestressed anchor cable loss of anchorage force soft rock creep coupling effect

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	Articles by authors
	WANG Kezhong1
	WU Hui1
	ZHAO Yufei2

Cite this article:

WANG Kezhong1,WU Hui1,ZHAO Yufei2. Coupling between reduction of force in prestressed anchor cable and rock#br# creep in deep-buried underground powerhouse[J]. , 2018, 37(6): 1481-1488.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1483 OR http://www.rockmech.org/EN/Y2018/V37/I6/1481

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