地下综合管廊结构斜穿活动地裂缝的变形破坏机制室内模型试验研究

doi:10.13722/j.cnki.jrme.2019.0308

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Abstract Taking the ground fissure sites in Xi?an area as the research background，indoor physical model tests of an underground utility tunnel crossing ground fissures at an angle of 45°were performed with a geometrical reduction ratio of 1:15. The pressure of the peripheral soil and the surface strain，convergence displacement and macroscopic failure of the utility tunnel under the relative movement between the hanging and foot walls were analyzed，and the deformation and failure mode of the utility tunnel were introduced. The results indicate that the longitudinal contact pressure between the soil and the top face of the structure significantly increases in the hanging wall while decreases in the foot wall as the relative movement develops，and that the lateral contact pressure in the intersectant range between the ground fissure and the structural axis is relative larger. The longitudinal and ring cracks in the structure surface distribute respectively in the ranges of 2.9D–5.1D(D = 0.277 m) and 0.9D in the foot wall. The deformation of the utility tunnel is asymmetric and the deformation in the hanging wall is higher than that in the foot wall. The structure is in a complex stress state of torsion, bend and shear，and hence，can be considered as a thin-walled member. The research can provide some references for the structural design and the formulation prevention of underground utility tunnels in Xi?an city.

Key words： tunneling engineering underground utility tunnel ground fissure model test deformation failure mode

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	Articles by authors
	HU Zhiping1
	2
	ZHANG Dan1
	ZHANG Yaguo1
	2
	WANG Shaoqing1
	LI Fangtao1

Cite this article:

HU Zhiping1,2,ZHANG Dan1, et al. Test study on deformation and failure mechanisms of utility tunnels obliquely crossing ground fissures[J]. , 2019, 38(12): 2550-2560.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2019.0308 OR http://www.rockmech.org/EN/Y2019/V38/I12/2550

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