Study of the Pore Water Pressure Development Characteristics of PHC Pipe Piles in Soft Soil Foundations
文献类型：期刊论文
| 作者 | Jia, Zhaolin1,2,3; Wu, Han2,3; He, Shuaiqi2,3; Zhao, Qixiang2,3; Zhang, Xiaoxu2,3 |
| 刊名 | BUILDINGS
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 14期号:7页码:17 |
| 关键词 | PHC pipe pile excess pore water pressure field test pore pressure monitoring |
| DOI | 10.3390/buildings14071976 |
| 英文摘要 | When constructing hollow prestressed high-strength concrete (PHC) pipe piles in soft soil foundations, the generation and dissipation of pore water pressure can induce negative friction on the pile. This phenomenon increases the settlement of the pile foundation and, in severe cases, can lead to pile deflection and flotation. To further investigate the development characteristics of pore water pressure during PHC hollow pipe pile driving in soft soil, this study combined existing theories and numerical models to analyze the generation and influence areas of pore water pressure. Field tests were conducted at three different sites: an untreated site, a surcharge preloading site, and a site treated with cement mixing piles and well dewatering. These tests monitored and analyzed the horizontal and vertical development and behavior of pore water pressure during pile driving at each site. The results indicate that during the pile driving process, when the horizontal distance from the pile center is 3d and 9d, the peak values of the excess pore water pressure in the site treated with cement mixing piles and well dewatering are 117 kPa and 100 kPa. After pile driving is completed, they decrease to 50 kPa and 48 kPa, respectively. The peak values of excess pore water pressure in the surcharge preloading site are 122 kPa and 97 kPa, and after pile driving, they decreased to 80 kPa and 21 kPa, respectively. The peak values of excess pore water pressure in untreated sites are 140 kPa and 121 kPa; after pile driving, they decreased to 82 kPa and 60 kPa, respectively. Pore water pressure increases with the depth of pile driving and decreases with distance from the pile driving location. The peak pore water pressure and dissipation rate during construction were found to be higher at the untreated site compared to the other two sites. Therefore, during pile sinking in soft soil foundations, dewatering and driving drainage boards are effective methods for reducing pore water pressure and accelerating its dissipation. These findings provide a theoretical basis and technical support for ensuring the safety of engineering constructions. |
| 资助项目 | Open Research Fund of State Key Laboratory ofGeomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academyof Sciences[SKLGME022004] ; Hebei Natural Science Foundation[E2024402142] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001276615700001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42097]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jia, Zhaolin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Hebei Univ Engn, Hebei Key Lab Intelligent Water Conservancy, Handan 056038, Peoples R China 3.Hebei Univ Engn, Sch Water Conservancy & Hydroelect Power, Handan 056038, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Zhaolin,Wu, Han,He, Shuaiqi,et al. Study of the Pore Water Pressure Development Characteristics of PHC Pipe Piles in Soft Soil Foundations[J]. BUILDINGS,2024,14(7):17. |
| APA | Jia, Zhaolin,Wu, Han,He, Shuaiqi,Zhao, Qixiang,&Zhang, Xiaoxu.(2024).Study of the Pore Water Pressure Development Characteristics of PHC Pipe Piles in Soft Soil Foundations.BUILDINGS,14(7),17. |
| MLA | Jia, Zhaolin,et al."Study of the Pore Water Pressure Development Characteristics of PHC Pipe Piles in Soft Soil Foundations".BUILDINGS 14.7(2024):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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