深部地下泵站厂房锚固岩体时效变形特征与加固效应

doi:10.13722/j.cnki.jrme.2019.0312

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Abstract The support system of prestressed anchor cables can effectively reduce the expansion of the plastic zone of the surrounding rock in underground cavers. Based on in-situ monitoring and numerical analysis for the high-wall and long-span underground caverns，the deformation evolution process of the surrounding rock and the time-dependent characteristics of the anchor cable tension are analyzed. Three types of change modes of the anchor cable tension，including monotonically increasing，decreasing firstly and then increasing，and monotonically decreasing respectively at the top arch，arch waist and side wall of the underground cavern，are proposed. The deformation characteristics of the anchored rock during the excavation process are analyzed by using the finite difference software FLAC3D，and the variation mode of the anchor cable tension and the supporting effect are discussed. The results show that the anchor cable tension presents remarkable time- dependent characteristics and is closely related to its spatial position；The thru-anchor cable in the middle partition wall effectively reduces the distribution range of the plastic zone of the rock wall. The research conclusion has important theoretical value and guiding significance for the design and construction of similar projects.

Key words： rock mechanics pump station cavern prestressed anchor cable loss of anchorage force fault time-dependent characteristics

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	Articles by authors
	WANG Kezhong1
	JIN Zhihao1
	MA Chao2

Cite this article:

WANG Kezhong1,JIN Zhihao1,MA Chao2. Time-dependent deformation characteristics and reinforcement effect of anchored rock mass in deep underground pumping stations#br#[J]. , 2019, 38(11): 2263-2271.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2019.0312 OR http://www.rockmech.org/EN/Y2019/V38/I11/2263

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