排水刚性桩抗液化特性数值计算分析
TU473.1; 为分析排水刚性桩的抗液化作用效果,开展了排水刚性桩的数值计算模拟,基于振动台试验实测结果验证了计算模型的可靠性,针对设置不同排水通道数量的排水桩桩周超孔压比、超孔隙水渗流特性等进行了计算分析.结果表明:①试验实测值与数值模拟结果吻合较好,证明了计算模型的可靠性和合理性;②桩身1倍桩径处超孔压比峰值为0.7,1.5倍桩径处为1.0,排水刚性桩的有效作用范围在桩周1倍桩径左右;③单侧排水通道排水桩影响范围为以桩心为圆心、1倍桩径为半径的近似半圆,双侧和四侧排水通道排水桩影响范围为与单侧排水通道圆心和半径相同的整圆,排水体附近渗流矢量均指向排水通道,表明了排水通道发挥了有效的排水作...
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| Published in | 防灾减灾工程学报 Vol. 44; no. 5; pp. 1177 - 1183 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
河海大学土木与交通学院,江苏 南京 210098%山东大学土建与水利学院,山东 济南 250061%常熟理工学院商学院,江苏 常熟 215500
01.10.2024
山东高速集团有限公司创新研究院,山东 济南 250014%河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-2132 |
| DOI | 10.13409/j.cnki.jdpme.20240227003 |
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| Abstract | TU473.1; 为分析排水刚性桩的抗液化作用效果,开展了排水刚性桩的数值计算模拟,基于振动台试验实测结果验证了计算模型的可靠性,针对设置不同排水通道数量的排水桩桩周超孔压比、超孔隙水渗流特性等进行了计算分析.结果表明:①试验实测值与数值模拟结果吻合较好,证明了计算模型的可靠性和合理性;②桩身1倍桩径处超孔压比峰值为0.7,1.5倍桩径处为1.0,排水刚性桩的有效作用范围在桩周1倍桩径左右;③单侧排水通道排水桩影响范围为以桩心为圆心、1倍桩径为半径的近似半圆,双侧和四侧排水通道排水桩影响范围为与单侧排水通道圆心和半径相同的整圆,排水体附近渗流矢量均指向排水通道,表明了排水通道发挥了有效的排水作用. |
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| AbstractList | TU473.1; 为分析排水刚性桩的抗液化作用效果,开展了排水刚性桩的数值计算模拟,基于振动台试验实测结果验证了计算模型的可靠性,针对设置不同排水通道数量的排水桩桩周超孔压比、超孔隙水渗流特性等进行了计算分析.结果表明:①试验实测值与数值模拟结果吻合较好,证明了计算模型的可靠性和合理性;②桩身1倍桩径处超孔压比峰值为0.7,1.5倍桩径处为1.0,排水刚性桩的有效作用范围在桩周1倍桩径左右;③单侧排水通道排水桩影响范围为以桩心为圆心、1倍桩径为半径的近似半圆,双侧和四侧排水通道排水桩影响范围为与单侧排水通道圆心和半径相同的整圆,排水体附近渗流矢量均指向排水通道,表明了排水通道发挥了有效的排水作用. |
| Abstract_FL | To analyze the anti-liquefaction effect of rigid-drainage piles and provide support for practi-cal engineering applications,a numerical simulation analysis of rigid-drainage piles was performed.The reliability of the model was validated based on the measured values from model tests.The analy-sis focused on excess pore pressure ratio and pore water seepage characteristics around rigid-drainage piles with varying numbers of drainage channels.The results showed that:(1)The measured values closely matched the numerical simulation results,confirming the reliability and accuracy of the calcula-tion model.(2)The peak value of the excess pore pressure ratio was 0.7 at a distance of one pile diame-ter from the pile,and 1.0 at a distance of 1.5 times the pile diameter,indicating that the effective range of the rigid-drainage pile was approximately one pile diameter.(3)The influence range of drain-age piles with a single drainage channel formed an approximate semi-circle with the pile center as the origin and a radius of one pile diameter.For piles with double-sided and four-sided drainage channels,the influence range formed a full circle with the same center and radius.Additionally,the seepage vec-tors near the drainage channels all pointed toward the drainage channels,indicating the channels′ effec-tive role in drainage. |
| Author | 张小宁 李文闻 陈育民 杨耀辉 辛公锋 |
| AuthorAffiliation | 山东高速集团有限公司创新研究院,山东 济南 250014%河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098;河海大学土木与交通学院,江苏 南京 210098%山东大学土建与水利学院,山东 济南 250061%常熟理工学院商学院,江苏 常熟 215500 |
| AuthorAffiliation_xml | – name: 山东高速集团有限公司创新研究院,山东 济南 250014%河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098;河海大学土木与交通学院,江苏 南京 210098%山东大学土建与水利学院,山东 济南 250061%常熟理工学院商学院,江苏 常熟 215500 |
| Author_FL | XIN Gongfeng YANG Yaohui CHEN Yumin ZHANG Xiaoning LI Wenwen |
| Author_FL_xml | – sequence: 1 fullname: YANG Yaohui – sequence: 2 fullname: XIN Gongfeng – sequence: 3 fullname: CHEN Yumin – sequence: 4 fullname: ZHANG Xiaoning – sequence: 5 fullname: LI Wenwen |
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| DOI | 10.13409/j.cnki.jdpme.20240227003 |
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| DocumentTitle_FL | Numerical Analysis of Liquefaction Resistance Characteristics of Rigid-drainage Piles |
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| Issue | 5 |
| Keywords | 数值计算分析 numerical analysis rigid-drainage pile 排水刚性桩 抗液化特性 anti-liquefaction charac-teristics excess pore pressure ratio 超孔压比 |
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| PublicationTitle | 防灾减灾工程学报 |
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| Publisher | 河海大学土木与交通学院,江苏 南京 210098%山东大学土建与水利学院,山东 济南 250061%常熟理工学院商学院,江苏 常熟 215500 山东高速集团有限公司创新研究院,山东 济南 250014%河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098 |
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