西北水电Issue(4)：10-19,27,11.DOI:10.3969/j.issn.1006-2610.2026.04.002
基于SHPB的水质耦合花岗岩动态破坏特征试验研究
Experimental Study on Dynamic Failure Characteristics of Granite Under Water Medium Coupling Based on SHPB
摘要
Abstract
To reveal the influence of interfacial water medium on rock dynamic failure behavior in the innovative water-medium coupled charging structure,granite of Grade Ⅲ surrounding rock from the Second Jiaozhou Bay Subsea Tunnel in Qingdao was selected as the research object.Using the Split Hopkinson Pressure Bar(SHPB)test system,dynamic compression and dynamic tensile tests were carried out under natural,water-saturated and water-medium coupled conditions.The effects of impact air pressure,interfacial water content and water-bear-ing material type on the stress-strain response,failure mode and fragment fractal characteristics of granite were analyzed.The results show that as the impact air pressure increases from 0.3 MPa to 0.5 MPa,the peak stress of rock samples generally rises,and the macroscopic fail-ure evolves gradually from local spalling and block cracking to fragmentation and pulverization.Under water-medium coupled conditions,the post-peak curves of rock samples mostly present a plateau type or stepwise slow decline.Compared with porous fiber materials,hydrogel ma-terials possess better interfacial continuity and water retention capacity,and achieve superior regulation effects on impact load transmission and failure processes.With the increase of impact air pressure,the fractal dimensions of rock samples under various conditions all show an increasing trend.Rock samples with a single layer of hydrogel exhibit relatively high fractal dimension and the most sufficient fragmentation.The research results can provide experimental support for the optimization of innovative water-medium coupled charging structures in tunnel blasting and the understanding of rock fragmentation mechanisms.关键词
隧道爆破/水质耦合/SHPB/花岗岩/动态破坏/分形维数Key words
tunnel blasting/water-medium coupling/SHPB/granite/dynamic failure/fractal dimension分类
建筑与水利引用本文复制引用
朱金财,肖义环,张茂晨,左俊,王军保,欧小强..基于SHPB的水质耦合花岗岩动态破坏特征试验研究[J].西北水电,2026,(4):10-19,27,11.基金项目
陕西省重点研发计划项目(2024SF-YBXM-557) （2024SF-YBXM-557）
中国中铁股份有限公司科技研究开发计划(科研院2025-专项-01) （科研院2025-专项-01）
