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Mechanical testing and engineering applicability analysis of SAP concrete used in buffer layer design for tunnels in active fault zones

文献类型：期刊论文

作者Cao, Jun1,3; Wu, Zheshu2; Cui, Zhen1,3; Mei, Xiancheng1,3
刊名REVIEWS ON ADVANCED MATERIALS SCIENCE
出版日期2024-04-11
卷号63期号:1页码:14
关键词SAP concrete buffer material anti-dislocation tunnel
ISSN号1606-5131
DOI10.1515/rams-2024-0002
英文摘要To tackle the challenge of dislocation damage when tunnels traverse active fault zones, this study introduces the concept of using brittle buffer materials for anti-dislocation. Building on this concept, we propose a novel concrete buffer material utilizing large-sized spherical super absorbent polymers (SAP) as a porogen, aimed at ensuring the safety of tunnel structures during active fault dislocations. To investigate the feasibility and superiority of SAP concrete as a buffer material compared to other similar materials, we prepared samples with three different SAP concrete proportions and conducted a series of physical and mechanical tests. The results show that SAP pre-hydrated with 0.2 molL-1 sodium carbonate solution exhibits a slower rate of moisture loss in the cement slurry, aiding the hydration reaction of concrete. The permeability coefficient of SAP concrete is approximately 10(-7) cms(-1), slightly lower than foam concrete of the same density level. SAP concrete buffer material demonstrates significant brittleness, in contrast to the mostly ductile nature of other buffers such as foam concrete and rubberized concrete. Utilizing the brittle nature of SAP concrete materials, when applied to tunnels affected by stick-slip active fault dislocations, its instantaneous loss of compressive capacity provides excellent yield performance, thus protecting the tunnel lining from damage. However, under certain circumferential pressure conditions, both the peak and residual strength of SAP concrete significantly increase. High peak and residual strengths do not favor the effective buffering effect of SAP concrete; therefore, an approach involving the intermittent arrangement of precast buffer blocks has been proposed for application.
资助项目National Key R&D Programs for Young Scientists[2023YFB2390400] ; National Natural Science Foundation of China[52379112] ; National Natural Science Foundation of China[U21A20159] ; National Natural Science Foundation of China[52079133] ; Key Research Program of FSDI[2022KY56(ZDZX)-02] ; Key Research Program of the Ministry of Water Resources[SKS-2022103] ; Yunnan Major Science and Technology Special Program[202102AF080001]
WOS研究方向Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:001200329300001
出版者DE GRUYTER POLAND SP Z O O
源URL[http://119.78.100.198/handle/2S6PX9GI/41069]  
专题中科院武汉岩土力学所
通讯作者Cui, Zhen
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
2.China Railway Siyuan Survey & Design Grp Co Ltd, Wuhan 430063, Hubei, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 10049, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Jun,Wu, Zheshu,Cui, Zhen,et al. Mechanical testing and engineering applicability analysis of SAP concrete used in buffer layer design for tunnels in active fault zones[J]. REVIEWS ON ADVANCED MATERIALS SCIENCE,2024,63(1):14.
APA Cao, Jun,Wu, Zheshu,Cui, Zhen,&Mei, Xiancheng.(2024).Mechanical testing and engineering applicability analysis of SAP concrete used in buffer layer design for tunnels in active fault zones.REVIEWS ON ADVANCED MATERIALS SCIENCE,63(1),14.
MLA Cao, Jun,et al."Mechanical testing and engineering applicability analysis of SAP concrete used in buffer layer design for tunnels in active fault zones".REVIEWS ON ADVANCED MATERIALS SCIENCE 63.1(2024):14.

入库方式： OAI收割

来源：武汉岩土力学研究所

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