Hits:

Date of Publication:2010-01-01

Journal:防灾减灾工程学报

Volume:30

Issue:2

Page Number:196-201

ISSN No.:1672-2132

Abstract:Seismic isolation technology is a new method developed in recent decades.It has been applied widely in ground-structures and achieved remarkable efficiencies.Based on Newmark' s step-by-step implicit integration FEM method and viscoelasticity artificial boundary theory,this paper investigated two kinds of shock absorption measures,which are shock absorption layer setting and grouting in the surrounding rock within certain influencing distances to the linings during the construction of water-conveyance tunnel.Moreover,the shock absorption effects,applicability and mechanisms are also analyzed.The results show:in soft soil,the stress in the lining of the water-conveyance tunnel decreases by using of the two measures,which is liable to protect the lining;rock grouting is a more effective shock absorption measure and the aseismatic capability of surrounding rocks can be improved.For water-conveyance tunnel in hard rocks,the shock layer is more effective.The results can provide useful reference for the aseismatic design of water-conveyance tunnel.

Note:新增回溯数据