小曲率半径转弯隧道盾构施工扰动实测分析

doi:10.13722/j.cnki.jrme.2016.0869

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Abstract To avoid the disturbing to the existing underground structures，shield advancing along a path with a small radius of curvature is sometimes inevitable. In this paper，the site observation data，the vertical and horizontal deformation and the pore water pressure of soils around the tunnel，were presented and analyzed when a shield advancing through a path with the radius of curvature being 118 m. It was found that the soil deformation mode was very different from those observed in the case of straight path. The soil around the tunnel on the outside of the curve was squeezed and moved upward and the horizontal displacement of soil around the tunnel consists of two parts. One part was induced by the squeezing effect，which was similar to that induced by shield advancing through a straight path，and the other part was from the turning action. The second part is nonsymmetrical. The soil on the outside of the curve moved away from the tunnel and the soil on the inside moved towards the center of the tunnel. The superimposition of the deformation increased the risk and should be paid more attention.

Key words： tunneling engineering tunneling advancing soil deformation pore water pressure small curvature radius

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	Articles by authors
	PAN Hong1
	2
	SU Wenyuan1
	3
	ZHAI Guolin4
	CAO Hong1
	2
	LUO Guanyong1
	2

Cite this article:

PAN Hong1,2,SU Wenyuan1, et al. Soil disturbance induced by shield advancing through a small radius path[J]. , 2017, 36(4): 1024-1031.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0869 OR http://www.rockmech.org/EN/Y2017/V36/I4/1024

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