Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests
During slurry shield tunneling in submarine geological conditions, it is of significance to prepare an appropriate slurry to maintain excellent rheological properties and penetration characteristics. To investigate the effects of seawater intrusion and high-temperature-induced deterioration on the p...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-05-01
|
| Series: | Frontiers in Materials |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2025.1592537/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849723383444406272 |
|---|---|
| author | Junqi Ru Yingran Fang Yingran Fang Yidong Guo Yidong Guo Luqing Jiang Hongzhi Liu Xinggao Li Xinggao Li Weiqiang Qi |
| author_facet | Junqi Ru Yingran Fang Yingran Fang Yidong Guo Yidong Guo Luqing Jiang Hongzhi Liu Xinggao Li Xinggao Li Weiqiang Qi |
| author_sort | Junqi Ru |
| collection | DOAJ |
| description | During slurry shield tunneling in submarine geological conditions, it is of significance to prepare an appropriate slurry to maintain excellent rheological properties and penetration characteristics. To investigate the effects of seawater intrusion and high-temperature-induced deterioration on the physical properties of different bentonite slurries, four typical commercial sodium bentonites of different origins were selected as raw materials in this study, and mineral composition characterization tests were carried out on the four sodium bentonites, respectively. Additionally, a comprehensive analysis was performed to evaluate the physical properties of the four bentonite slurries, including rheological tests, penetration tests, and microstructure observations. The results indicated that both increased seawater content and elevated temperature had remarkable effects on the rheological properties of the slurries, while the rheological and permeability properties of all four slurries deteriorated to varying degrees. The microstructure and morphology of the slurries mainly appeared as thin sheets with voids between them, and discrete particle accumulation was observed locally. The conclusions presented in this paper could offer guidance for future preparation of slurries used in slurry shield tunneling. |
| format | Article |
| id | doaj-art-5dac43c2bb75435dbaccb92f26f35b98 |
| institution | DOAJ |
| issn | 2296-8016 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj-art-5dac43c2bb75435dbaccb92f26f35b982025-08-20T03:11:03ZengFrontiers Media S.A.Frontiers in Materials2296-80162025-05-011210.3389/fmats.2025.15925371592537Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory testsJunqi Ru0Yingran Fang1Yingran Fang2Yidong Guo3Yidong Guo4Luqing Jiang5Hongzhi Liu6Xinggao Li7Xinggao Li8Weiqiang Qi9Beijing Water Construction Management Center, Beijing, ChinaKey Laboratory of Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing, ChinaKey Laboratory of Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing, ChinaQingdao Guoxin Development (Group) Co., Ltd., Qingdao, ChinaCCCC Tunnel Engineering Co. Ltd., Beijing, ChinaKey Laboratory of Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing, ChinaQingdao Guoxin Second Jiaozhou Bay Subsea Tunnel Co., Ltd., Qingdao, ChinaDuring slurry shield tunneling in submarine geological conditions, it is of significance to prepare an appropriate slurry to maintain excellent rheological properties and penetration characteristics. To investigate the effects of seawater intrusion and high-temperature-induced deterioration on the physical properties of different bentonite slurries, four typical commercial sodium bentonites of different origins were selected as raw materials in this study, and mineral composition characterization tests were carried out on the four sodium bentonites, respectively. Additionally, a comprehensive analysis was performed to evaluate the physical properties of the four bentonite slurries, including rheological tests, penetration tests, and microstructure observations. The results indicated that both increased seawater content and elevated temperature had remarkable effects on the rheological properties of the slurries, while the rheological and permeability properties of all four slurries deteriorated to varying degrees. The microstructure and morphology of the slurries mainly appeared as thin sheets with voids between them, and discrete particle accumulation was observed locally. The conclusions presented in this paper could offer guidance for future preparation of slurries used in slurry shield tunneling.https://www.frontiersin.org/articles/10.3389/fmats.2025.1592537/fullsubmarine geological conditionsseawater slurryrheological testpenetration testhigh temperature |
| spellingShingle | Junqi Ru Yingran Fang Yingran Fang Yidong Guo Yidong Guo Luqing Jiang Hongzhi Liu Xinggao Li Xinggao Li Weiqiang Qi Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests Frontiers in Materials submarine geological conditions seawater slurry rheological test penetration test high temperature |
| title | Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests |
| title_full | Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests |
| title_fullStr | Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests |
| title_full_unstemmed | Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests |
| title_short | Rheology, permeability and microstructure of seawater-based slurry for slurry shield tunneling: insights from laboratory tests |
| title_sort | rheology permeability and microstructure of seawater based slurry for slurry shield tunneling insights from laboratory tests |
| topic | submarine geological conditions seawater slurry rheological test penetration test high temperature |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2025.1592537/full |
| work_keys_str_mv | AT junqiru rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT yingranfang rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT yingranfang rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT yidongguo rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT yidongguo rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT luqingjiang rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT hongzhiliu rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT xinggaoli rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT xinggaoli rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests AT weiqiangqi rheologypermeabilityandmicrostructureofseawaterbasedslurryforslurryshieldtunnelinginsightsfromlaboratorytests |