Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip
This paper investigates the bearing behavior of axially loaded rock socketed piles in limestone stratum embedded with a karst cavity beneath the pile. The pile foundation supporting a cross-river bridge located in a karst area in China is considered. Based on this project, three-dimensional finite e...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523003832 |
| _version_ | 1797798906734575616 |
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| author | Gang Han Hui Zhang Zherun Wang Yanyan Wang Ningning Geng Panpan Guo Xian Li Yanlin Zhao Hang Lin Yixian Wang |
| author_facet | Gang Han Hui Zhang Zherun Wang Yanyan Wang Ningning Geng Panpan Guo Xian Li Yanlin Zhao Hang Lin Yixian Wang |
| author_sort | Gang Han |
| collection | DOAJ |
| description | This paper investigates the bearing behavior of axially loaded rock socketed piles in limestone stratum embedded with a karst cavity beneath the pile. The pile foundation supporting a cross-river bridge located in a karst area in China is considered. Based on this project, three-dimensional finite element analyses are performed to capture the effects of pile length, pile diameter, limestone cohesion, and cavity roof thickness. Their impact on the bearing characteristics of the pile is comprehensively outlined through analysis of load-settlement curves, variations in pile bearing capacity, distributions of axial pile force and pile side friction, as well as contours of vertical ground and cavity roof displacement. It is found that the load-settlement curves exhibit the saltation type, based on which the pile-bearing capacity can be conveniently obtained. The pile bearing capacity increases nonlinearly with increasing the pile length, whereas almost linearly with an increase in the pile diameter, limestone cohesion, and cavity roof thickness. For the considered conditions, larger magnitudes of vertical ground displacements occur primarily surrounding the pile side in the pebble layer and at the pile bottom. This is attributed to the weakening effect of the karst cavity on the bearing capacity of the cavity roof. The achievements from this study are beneficial for the design optimization of rock socketed piles in karst areas. |
| first_indexed | 2024-03-13T04:11:54Z |
| format | Article |
| id | doaj.art-cf4ee2d135074b808c513690a33bb440 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:11:54Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-cf4ee2d135074b808c513690a33bb4402023-06-21T06:54:54ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02203Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tipGang Han0Hui Zhang1Zherun Wang2Yanyan Wang3Ningning Geng4Panpan Guo5Xian Li6Yanlin Zhao7Hang Lin8Yixian Wang9Jinan Rail Transit Group Co. Ltd., Jinan 250101, ChinaCollege of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaJinan Rail Transit Group Co. Ltd., Jinan 250101, ChinaJinan Rail Transit Group Co. Ltd., Jinan 250101, ChinaHefei Rail Transit Group Co. Ltd., Hefei 230001, ChinaCollege of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Corresponding authors.College of Civil Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Resource and Safety Engineering, Central South University, Changsha 410083, ChinaCollege of Civil Engineering, Hefei University of Technology, Hefei 230009, China; Corresponding authors.This paper investigates the bearing behavior of axially loaded rock socketed piles in limestone stratum embedded with a karst cavity beneath the pile. The pile foundation supporting a cross-river bridge located in a karst area in China is considered. Based on this project, three-dimensional finite element analyses are performed to capture the effects of pile length, pile diameter, limestone cohesion, and cavity roof thickness. Their impact on the bearing characteristics of the pile is comprehensively outlined through analysis of load-settlement curves, variations in pile bearing capacity, distributions of axial pile force and pile side friction, as well as contours of vertical ground and cavity roof displacement. It is found that the load-settlement curves exhibit the saltation type, based on which the pile-bearing capacity can be conveniently obtained. The pile bearing capacity increases nonlinearly with increasing the pile length, whereas almost linearly with an increase in the pile diameter, limestone cohesion, and cavity roof thickness. For the considered conditions, larger magnitudes of vertical ground displacements occur primarily surrounding the pile side in the pebble layer and at the pile bottom. This is attributed to the weakening effect of the karst cavity on the bearing capacity of the cavity roof. The achievements from this study are beneficial for the design optimization of rock socketed piles in karst areas.http://www.sciencedirect.com/science/article/pii/S2214509523003832Rock socketed pileKarst cavityBearing behaviorNumerical analysisLimestone |
| spellingShingle | Gang Han Hui Zhang Zherun Wang Yanyan Wang Ningning Geng Panpan Guo Xian Li Yanlin Zhao Hang Lin Yixian Wang Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip Case Studies in Construction Materials Rock socketed pile Karst cavity Bearing behavior Numerical analysis Limestone |
| title | Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| title_full | Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| title_fullStr | Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| title_full_unstemmed | Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| title_short | Bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| title_sort | bearing behavior of rock socketed pile in limestone stratum embedded with a karst cavity beneath pile tip |
| topic | Rock socketed pile Karst cavity Bearing behavior Numerical analysis Limestone |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523003832 |
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