基于粗糙集与AHP的深埋隧道软岩大变形研究

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Abstract Research purposes:Large deformation of soft rock is the main engineering geological problem encountered in the construction of deep buried railway tunnels. Based on the construction data of Lanzhou-Chongqing railway, this paper analyzes the main influencing factors controlling the large deformation level of soft rock, determines its subjective and objective weight, establishes the prediction model of large deformation of soft rock and carries out calculation verification.
Research conclusions:(1) Lithology, rock integrity, layer thickness, ground stress state, relationship between rock strata strike and tunnel, groundwater and rock strata dip angle are the main factors affecting large deformation of soft rock. (2) In the subjective and objective analysis methods of rough set and Analytic Hierarchy Process (AHP), the weights of rock integrity degree, layer thickness and ground stress state are significantly higher, while the other factors are relatively minor. (3) The calculation results show that the AHP structural model has a high matching degree in Hadapu tunnel of Lanzhou-Chongqing railway. (4) The research result can provide support for similar railway geological line selection, risk assessment and engineering design, and provide a new idea for classification and prediction of large deformation of tunnel surrounding rock.

Key words： tunnel engineering large deformation prediction of soft rock influencing factors AHP rough set theory

Received: 11 July 2022

PACS:

U212.2

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	Articles by authors
	MA Bangchuang
	ZHANG Zhiliang
	ZHAO Wen
	WANG Peng
	CHEN Xingqiang
	LUO Feng

Cite this article:

MA Bangchuang,ZHANG Zhiliang,ZHAO Wen, et al. Research on the Large Deformation of Soft Rock in Deep Tunnel Based on Rough Set and AHP[J]. Journal of Railway Engineering Society, 2022, 39(10): 59-64.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I10/59

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