膨胀性黄土隧道钢拱架–格栅联合支护力学特性研究

doi:10.13722/j.cnki.jrme.2016.0599

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Abstract The problem of tunnel supporting in the expansive loess was investigated in this paper. A mechanical model for composite supports was established employing the theory of elastic shells. An improved procedure for computing the characteristic curve of ground supporting for tunnel in expansive loess was presented with the equivalent section approach and an expansive force variable. The study on the mechanical behavior of primary supports in loess tunnel was performed based on the proposed model and method. And then a suitable composite supports of steel，gird and shotcrete for the expansive loess tunnel was proposed. The model and method established were proved appropriate for the mechanical characteristic analysis of primary supports for tunnels in expansive loess，and it explained the failure of original primary support theoretically. The composite support allows the different materials to fully display its potentials to ensure the stability of tunnel and therefore have an advantage over the support methods of steel-shotcrete and grid-shotcrete.

Key words： tunnelling engineering expansive loess composite supports theory of thin shells support characteristic curve

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	Articles by authors
	LI Shuchen
	YAN Qin
	XIE Can
	WU Jing

Cite this article:

LI Shuchen,YAN Qin,XIE Can, et al. The mechanical behavior of composite supports of steel-grid in loess tunnel[J]. , 2017, 36(2): 446-456.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0599 OR http://www.rockmech.org/EN/Y2017/V36/I2/446

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