伍家岗大桥隧道锚三维地质力学模型试验研究

doi:10.13722/j.cnki.jrme.2016.0911

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Abstract In order to reveal mechanism and the global stability of Wujiagang yangtze river bridge tunnel-type anchorages，the deformation characteristics and the potential failure mode of surrounding rockmass，a 3D geomechanical model test with the similar scale of 1∶40 for tunnel-type anchorage was carried out. Base on the similarity theory，the complex geological structures including anchor plug body and different rock mass are simulated. Through the overloading destructive model test，the deformation characters，the failure process，the pattern and mechanism of tunnel-type anchorages and surrounding rockmass are obtained. The test results show that the deformation characteristic curves at the rear surfaces of anchorages and surrounding rockmass present symmetrical bimodal shape，and those of the frontal surfaces present the shape of convex upward. The deformations at the rear surface are greater than those at the frontal surface. Because of the clamping effect，the amount of deformation in the surrounding rock range 1.0 to 1.5 times width of anchorages rear surface is large. After comprehensive analysis，the global stability coefficient of tunnel-type anchorages is considered to be 9.0.

Key words： geomechanics Wujiagang bridge tunnel-type anchorage clamping effect global stability geomechanical model test

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	Articles by authors
	JIANG Yuzhou1
	WANG Ruihong2
	ZHU Jiebing1
	LIU Jinghua3
	LI Cong1
	WANG Ben1

Cite this article:

JIANG Yuzhou1,WANG Ruihong2,ZHU Jiebing1, et al. Geomechanical model test on global stability for Wujiagang bridge tunnel-type anchorages[J]. , 2016, 35(S2): 4103-4113.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0911 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/4103

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