Comparison and discussion on fragmentation behavior of soft rock in multi-indentation tests by a single TBM disc cutter

doi:10.1016/j.tust.2016.02.021

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 会议论文

	Comparison and discussion on fragmentation behavior of soft rock in multi-indentation tests by a single TBM disc cutter
	Liu, Quansheng 1; Pan, Yucong 1; Liu, Jianping 1; Kong, Xiaoxuan 2; Shi, Kai 3
	2016
会议日期	2015
会议地点	Singapore, SINGAPORE
关键词	Tunnel boring machine (TBM) Disc cutter Penetration depth Rock fragmentation Indentation test
卷号	57
DOI	10.1016/j.tust.2016.02.021
页码	151-161
英文摘要	This paper is to investigate the mechanical responses and failure characteristics of soft rock in multi indentation tests by a single TBM constant cross section (CCS) disc cutter. Different pre-set penetration depths and totally three cycles of indentation processes were employed in the repeated indentation tests conducted on the cubic cement mortar specimens. The load-penetration depth curve, penetration load, peak-load penetration depth, rock breakage work and compacted zone depth for the three indentation processes were analyzed. The strength and deformation properties and failure behavior of soft rock under different indentation conditions were revealed. The rock breakage behavior after several indentation processes still presents brittle failure characteristic with small pre-set penetration depths, but the specimens with large pre-set penetration depths appear obvious plastic failure mode. Approximately equal leap loads are obtained from both the intact specimen in direct indentation failure test and the weakened specimens after several indentation processes with different pre-set penetration depths, but the pealcload penetration depths for specimens with different pre-set penetration depths are varying. Curves of the cumulative penetration depth and cumulative rock breakage work both reach the corresponding peak values for one certain pre-set penetration depth. Along with this most unfavourable pre-set penetration depth, rock breakage efficiency is the lowest and energy consumption is the highest (C) 2016 Published by Elsevier Ltd.
会议录	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
会议录出版者	PERGAMON-ELSEVIER SCIENCE LTD
会议录出版地	OXFORD
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS记录号	WOS:000378184100018
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4911]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech ; 2.Wuhan Univ, Key Lab Safety Geotech & Struct Engn Hubei Prov ; 3.Mkt Ctr Country Garden Holdings Co Ltd
推荐引用方式 GB/T 7714	Liu, Quansheng,Pan, Yucong,Liu, Jianping,et al. Comparison and discussion on fragmentation behavior of soft rock in multi-indentation tests by a single TBM disc cutter[C]. 见:. Singapore, SINGAPORE. 2015.