十字岩柱法隧道开挖地质力学模型试验研究

doi:10.13722/j.cnki.jrme.2015.1125

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Abstract Under the engineering background of the Chongqing rail transit line No. 3，the geomechanical model test on the cross rock pillar concealed excavation method was carried out. The excavation process of the large cross section tunnel was optimized. Various similar materials of the surrounding rock were experimentally compared，the anchoring-grouting reinforcement was simulated and the deformation of cavern excavation was monitored and analyzed. The experimental results showed that the developed structural frame successfully simulated the cavern excavation under confining pressure and that the failure process of surrounding rock was directly observed during excavation. The sensors measured the displacements in real-time in the surrounding rocks during the excavation. The simultaneous excavation supporting and deformation recording were realized. The numerical analysis model was established and the calculated results were basically identical to the test results. The final displacement value met the test requirements，indicating that the expected effect was achieved with the model test.

Key words： tunnelling engineering tunnel excavation cross rock pillar model test similar material

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	Articles by authors
	LIU Quansheng1
	2
	3
	LEI Guangfeng1
	XIAO Longge4
	WANG Juntao1
	ZHANG Jing1

Cite this article:

LIU Quansheng1,2,3, et al. Geomechanical model test on the tunnel excavation with cross rock pillar method[J]. , 2016, 35(5): 919-927.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1125 OR http://www.rockmech.org/EN/Y2016/V35/I5/919

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