Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling
The aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed mate...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/14/4957 |
| _version_ | 1797588488019771392 |
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| author | Yi Lu Tong Wan Xiangyun Huang Jiahui Lu Shan Lin Xingzhong Nong |
| author_facet | Yi Lu Tong Wan Xiangyun Huang Jiahui Lu Shan Lin Xingzhong Nong |
| author_sort | Yi Lu |
| collection | DOAJ |
| description | The aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed material are porous sand, rubber, and cement. Static and dynamic experiments were conducted to assess the unconfined compressive strength (UCS), flexural stiffness, and compaction resistance at various mixing ratios. The results indicate that the addition of porous sand decreases the UCS compared to the solid sand under similar mixing conditions. The addition of rubber offers the elasticity, thereby enhancing the compaction resistance. However, increasing the rubber content compromises UCS. Furthermore, this study presents a linear equation to predict the 7-day UCS, which can be used as a rapid estimation for UCS, flexural stiffness, and compaction resistance of the proposed material. It is important to note that this study only investigates the fundamental mechanical properties of the proposed material, and further comprehensive research is necessary to fully understand its workability, durability, and other behaviour before practical application. |
| first_indexed | 2024-03-11T00:52:47Z |
| format | Article |
| id | doaj.art-561e9ef1716a46bcba57fe1d385bd435 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T00:52:47Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-561e9ef1716a46bcba57fe1d385bd4352023-11-18T20:15:44ZengMDPI AGMaterials1996-19442023-07-011614495710.3390/ma16144957Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for TunnellingYi Lu0Tong Wan1Xiangyun Huang2Jiahui Lu3Shan Lin4Xingzhong Nong5School of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaEarthquake Engineering Research and Test Center, Guangzhou 510405, ChinaDepartment of Civil Engineering, Xi’an University of Architecture and Technology (XAUAT), Xi’an 710055, ChinaGuangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, ChinaGuangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, ChinaThe aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed material are porous sand, rubber, and cement. Static and dynamic experiments were conducted to assess the unconfined compressive strength (UCS), flexural stiffness, and compaction resistance at various mixing ratios. The results indicate that the addition of porous sand decreases the UCS compared to the solid sand under similar mixing conditions. The addition of rubber offers the elasticity, thereby enhancing the compaction resistance. However, increasing the rubber content compromises UCS. Furthermore, this study presents a linear equation to predict the 7-day UCS, which can be used as a rapid estimation for UCS, flexural stiffness, and compaction resistance of the proposed material. It is important to note that this study only investigates the fundamental mechanical properties of the proposed material, and further comprehensive research is necessary to fully understand its workability, durability, and other behaviour before practical application.https://www.mdpi.com/1996-1944/16/14/4957tunnellingdynamic loadconcreteporous materialunconfined compressive strength |
| spellingShingle | Yi Lu Tong Wan Xiangyun Huang Jiahui Lu Shan Lin Xingzhong Nong Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling Materials tunnelling dynamic load concrete porous material unconfined compressive strength |
| title | Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling |
| title_full | Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling |
| title_fullStr | Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling |
| title_full_unstemmed | Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling |
| title_short | Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling |
| title_sort | preliminary mechanical evaluation of grouting concrete as a protective layer for tunnelling |
| topic | tunnelling dynamic load concrete porous material unconfined compressive strength |
| url | https://www.mdpi.com/1996-1944/16/14/4957 |
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