Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation
This study investigates the effects of interface shape and bonding conditions on the side friction resistance of the cast-in-place pile in coral reef limestone stratum of the China-Maldives Friendship Bridge area. Large-scale direct shear tests are performed on the coral reef limestone-concrete inte...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-12-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1515670/full |
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| author | Yongtao Zhang Ruiyuan Zhang Peishuai Chen Fuquan Ji Huiwu Luo Enlong Liu |
| author_facet | Yongtao Zhang Ruiyuan Zhang Peishuai Chen Fuquan Ji Huiwu Luo Enlong Liu |
| author_sort | Yongtao Zhang |
| collection | DOAJ |
| description | This study investigates the effects of interface shape and bonding conditions on the side friction resistance of the cast-in-place pile in coral reef limestone stratum of the China-Maldives Friendship Bridge area. Large-scale direct shear tests are performed on the coral reef limestone-concrete interface to investigate the exertion mechanism of interfacial strength. A finite-discrete element coupling method (FDEM) is employed to develop a constitutive model for coral reef limestone. A numerical calculation method for the side friction resistance capacity of pile foundations in coral reef limestone strata is proposed based on the bearing characteristics of side friction resistance in pile-coral reef limestone interactions. The shear tests on seven shapes of pile-rock interfaces indicate that bonding condition is the primary factor influencing interface strength, while interface shape has a minimal impact. The cement slurry fills the pores to form an interface reinforcement that possesses a strength greater than that of the coral reef limestone. The computational results from the constitutive model of coral reef limestone match well with the laboratory test results, demonstrating that the FDEM can effectively simulate the effects of high porosity and bonding strength on the mechanical properties of coral reef limestone. The FDEM-based numerical results for the interface strength between cast-in-place pile and coral reef limestone exhibit good consistency with the laboratory shear test results, which validates the effectiveness and accuracy of the numerical calculation method for side friction resistance of cast-in-place pile in coral reef limestone strata. These findings can provide valuable reference for the design and construction of pile foundations in marine island and reef projects. |
| format | Article |
| id | doaj-art-f9d5b01d84ab46abbd2b53fff093077f |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj-art-f9d5b01d84ab46abbd2b53fff093077f2024-12-13T06:21:34ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-12-011210.3389/feart.2024.15156701515670Study on lateral friction resistance of concrete pouring structure in coral reef limestone formationYongtao Zhang0Ruiyuan Zhang1Peishuai Chen2Fuquan Ji3Huiwu Luo4Enlong Liu5CCCC Second Harbour Engineering Company Ltd., Wuhan, ChinaCCCC Second Harbour Engineering Company Ltd., Wuhan, ChinaCCCC Second Harbour Engineering Company Ltd., Wuhan, ChinaCCCC Second Harbour Engineering Company Ltd., Wuhan, ChinaCCCC Second Harbour Engineering Company Ltd., Wuhan, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu, ChinaThis study investigates the effects of interface shape and bonding conditions on the side friction resistance of the cast-in-place pile in coral reef limestone stratum of the China-Maldives Friendship Bridge area. Large-scale direct shear tests are performed on the coral reef limestone-concrete interface to investigate the exertion mechanism of interfacial strength. A finite-discrete element coupling method (FDEM) is employed to develop a constitutive model for coral reef limestone. A numerical calculation method for the side friction resistance capacity of pile foundations in coral reef limestone strata is proposed based on the bearing characteristics of side friction resistance in pile-coral reef limestone interactions. The shear tests on seven shapes of pile-rock interfaces indicate that bonding condition is the primary factor influencing interface strength, while interface shape has a minimal impact. The cement slurry fills the pores to form an interface reinforcement that possesses a strength greater than that of the coral reef limestone. The computational results from the constitutive model of coral reef limestone match well with the laboratory test results, demonstrating that the FDEM can effectively simulate the effects of high porosity and bonding strength on the mechanical properties of coral reef limestone. The FDEM-based numerical results for the interface strength between cast-in-place pile and coral reef limestone exhibit good consistency with the laboratory shear test results, which validates the effectiveness and accuracy of the numerical calculation method for side friction resistance of cast-in-place pile in coral reef limestone strata. These findings can provide valuable reference for the design and construction of pile foundations in marine island and reef projects.https://www.frontiersin.org/articles/10.3389/feart.2024.1515670/fullcoral reef limestonecast-in-place pileinterface shearside friction resistanceelastoplastic damage constitutive modelnumerical computational method |
| spellingShingle | Yongtao Zhang Ruiyuan Zhang Peishuai Chen Fuquan Ji Huiwu Luo Enlong Liu Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation Frontiers in Earth Science coral reef limestone cast-in-place pile interface shear side friction resistance elastoplastic damage constitutive model numerical computational method |
| title | Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| title_full | Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| title_fullStr | Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| title_full_unstemmed | Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| title_short | Study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| title_sort | study on lateral friction resistance of concrete pouring structure in coral reef limestone formation |
| topic | coral reef limestone cast-in-place pile interface shear side friction resistance elastoplastic damage constitutive model numerical computational method |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1515670/full |
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