聚–消能复合垫层保护下的水平建基面开挖方法研究

doi:10.13722/j.cnki.jrme.2015.1005

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Abstract In order to improve the excavation efficiency of hydraulic structures horizontal rock foundation，an energy shaped and dissipation composite cushion is presented，and developed iron sand concrete with high wave impedance used as energy shaped structure construction material. It analyzed the composite cushion’s impact on damage properties at the bottom of blasting holes，and proved its feasibility to be used for foundation surface excavation by using blasting damage numerical simulation technology based on LS-DYNA secondary development. Furthermore，it verified the composite cushions actual effect by carrying out blasting field experiments in Baihetan hydropower station，where controlled surface over excavation and under excavation amount，and explosion damage depth were measured. The results showed that the composite structure enhanced rock fracture degree in horizontal direction and reduced the vertical damage depth at the bottom of blasting holes. Thus it effectively reduced the over and under excavation amount and controlled foundation surface fluctuation，helping to achieve a good rock foundation. Also，it could make full use of the excavation work face and achieve one-time forming of vertical blasting holes， which could realize rock foundation rapid excavation on a large scale.

Key words： hydraulic engineering foundation surface excavation energy shaped and dissipation composite cushion numerical simulation blasting experiment

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	Articles by authors
	HU Haoran1
	2
	LU Wenbo1
	2
	XI Hao3
	YAN Peng1
	2
	WU Gang3
	HU Yingguo1
	2
	CHEN Ming1
	2

Cite this article:

HU Haoran1,2,LU Wenbo1, et al. Horizontal foundation surface excavation method under the protection of energy shaped and dissipation composite cushion[J]. , 2016, 35(S2): 4129-4138.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1005 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/4129

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