大岗山水电站高拱坝蓄水初期工作性态演化研究

doi:10.13722/j.cnki.jrme.2019.0001

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Abstract The displacement and stress state of high arch dams are the key concerns of arch dams during the initial impoundment period. In this paper，adopting the microseismic monitoring technology in combination of finite element numerical simulation，the internal correlation between microseismic deformation and stress in arch dam was studied，and the change laws of stress and displacement during the initial impoundment period were analyzed. The evolution law of working behavior during the initial impoundment period was investigated，and a method for judging the actual stress state of the arch dam by microseismic events was proposed. The results show that the microseismic events are consistent with the stress distribution of the arch dam in space and time and that the concentration and migration of the high compressive stress of the arch dam are the internal driving force of microseismic events. Both the high compressive stress and the microseismic deformation are concentrated on the dam heel before impoundment while transferred from the dam heel to the dam toe after impoundment. It is also revealed that the principle tensile stress zone is transferred from the arch dam abutment to the dam heel after impoundment. The distribution of the stress concentration area of the arch dam in different impoundment periods can be inferred from the cumulative frequency distribution of of microseismic events. The results can provide a certain reference for the study on actual working performances of arch dams.

Key words： rock mechanics high arch dam microseismic monitoring numerical simulation impoundment period work performance

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	Articles by authors
	MA Ke1
	2
	WANG Longjiang3
	ZHUANG Duanyang1
	2
	LONG Liji3
	ZHANG Guoxin4
	LV Pengfei5

Cite this article:

MA Ke1,2,WANG Longjiang3, et al. Study on working performance evaluation of the high arch dam of Dagangshan#br# hydropower station during the initial impoundment period[J]. , 2019, 38(9): 1776-1785.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0001 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/I9/1776

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