| 软土地区基坑回弹对工程桩的影响分析研究 |
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| 引用本文： | 孙俊岭.软土地区基坑回弹对工程桩的影响分析研究[J].铁道工程学报,2011(10):46-52,89. |
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| 作者姓名： | 孙俊岭 |
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| 作者单位： | 铁道第三勘察设计院集团有限公司,天津,300251 |
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| 摘 要： | 研究目的:软土地区深基坑中的工程桩,如在设计中没有充分考虑基坑卸载回弹引起的桩身拉力影响时可能会导致桩身断裂的严重事故。通过本文的研究,认真分析深基坑开挖对桩身内力、变形及极限承载力的影响,提出软土地区考虑基坑回弹影响的桩基的设计方法,确保工程安全。研究结论:本文采用MIDAS/GTS软件对虹桥综合交通枢纽工程的试桩及深基坑中的工程桩进行了有限元模拟分析,并与试桩结果及工程桩回弹监测结果进行了对比分析。提出了在分析基坑回弹对深基坑中桩基的影响时桩土摩擦界面参数的确定方法;提出了在软土地区的深基坑中桩设计时考虑基坑回弹影响的设计原则、方法与相关建议;探讨了基坑回弹对桩抗拔承载力的影响。
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| 关 键 词： | 软土地区 深基坑 基坑回弹 桩土相互作用 摩擦面 |
Analysis and Research on Impact of Foundation Pit Rebound in Soft Soil Area on Engineering Pile |
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| SUN Jun-ling.Analysis and Research on Impact of Foundation Pit Rebound in Soft Soil Area on Engineering Pile[J].Journal of Railway Engineering Society,2011(10):46-52,89. |
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| Authors: | SUN Jun-ling |
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| Institution: | SUN Jun-ling(The Third Railway Survey and Design Institute Group Corporation,Tianjin 300251,China) |
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| Abstract: | Research purposes: The engineering pile of deep foundation pit in soft soil area may break if the pulling force of pile caused by the unloading rebound of the foundation pit is not fully considered in the design.This paper analyzes the the impact of the deep foundation pit excavation on the internal force,deformation and limit load-bearing capacity of the pile and offers the design method of the pile foundation in soft soil area on consideration of the rebound impact of foundation pit for ensuring the const... |
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| Keywords: | soft soil area deep foundation pit foundation pit rebound pile-soil interaction friction interface |
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