大梁隧道软岩大变形及其支护方案研究

doi:10.13722/j.cnki.jrme.2014.0899

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Abstract The in-situ displacement monitoring was carried out according to the geological characteristics of Daliang tunnel. The monitored result shows that tunnels deformation is charactered by high velocity，long period and large value. The maximum subsidence is 55 cm，the deformation rate run up to 1.69 cm per day. The rock masss elastic-plastic mechanics parameters are deduced by the generalized Hoek-Brown criterion based on the uniaxial and triaxial compression test result. With the rock mass considered as an elasto-plastic-rheological material which conforms to the empirical rheological model，the FEM inversion analysis was conducted based on the deformation monitored，and the rock masss rheology parameters could be got. The tunnels support design could be adjusted reasonably considering the displacement，the stress distribution and the damaged zone of the rock surrounding. According to the principle of new austrian tunnelling method，a new comprehensive support measures，which consists of enlargement of the deformation allowance，pre-grouting，bottom bolts installed，steel arch，system bolts and steel fabric installed，was adopted in Daliang tunnel which has poor rock surrounding and suffers large deformation during its excavation. It was confirmed by the fact that the tunnel was very safe after its construction.

Key words： tunnelling engineering high geostress soft rock large deformation FEM inversion support measure

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	Articles by authors
	DAI Yonghao1
	CHEN Weizhong1
	2
	TIAN Hongming1
	YANG Jianping1
	MENG Xiangjun3
	DENG Xiaolin3

Cite this article:

DAI Yonghao1,CHEN Weizhong1,2, et al. study oF Large deformation and support measures of Daliang tunnel with soft surrounding rockmass[J]. , 2015, 34(S2): 4149-4156.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0899 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4149

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