| 苏世定,徐 雄,张 博,吕述晖.珊瑚礁砂地层打入桩溜桩风险的判断方法[J].水运工程,2025,(2):197-202 |
| 珊瑚礁砂地层打入桩溜桩风险的判断方法 |
| Judgement method of driven pile running risk in coral reef sand |
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| DOI： |
| 中文关键词: 珊瑚礁砂 冲击动力沉桩 溜桩 预测方法 沉桩控制方法 |
| 英文关键词:coral reef sand impact pile driving pile running prediction method pile driving control method |
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| 摘要点击次数: 62 |
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| 中文摘要: |
| 珊瑚礁砂因其易破碎、高压缩性等异于常规砂土的特殊工程性质，冲击动力沉桩过程中易引起桩侧珊瑚礁砂颗粒破碎、剪缩等复杂变化，造成沉桩过程发生溜桩现象。溜桩未经预料且溜桩距离过长，不仅增加沉桩控制难度，且施工风险高，因此亟需一种预测深厚珊瑚砂地层打入桩溜桩深度的分析方法，用于指导沉桩控制，从而降低施工风险。依托实际工程，开展深厚珊瑚礁砂地层打入桩高应变试桩，分析溜桩状态下珊瑚礁砂的土阻力取值，提出并验证珊瑚礁砂地层打入桩溜桩深度预测方法，同时提出降低溜桩风险的沉桩控制方法，并应用于现场602根打入桩的施工溜桩风险预测及沉桩控制，得出珊瑚礁砂地层打入桩溜桩规律。 |
| 英文摘要: |
| Coral reef sand,due to its special engineering properties such as fragility and high compressibility,differs from conventional sand.During impact pile driving,the process can easily cause complex changes in coral reef sand particles,such as breakage and shear,leading to pile running.Unanticipated pile running,especially over long distances,not only increases the difficulty of pile driving control but also poses high construction risks.Therefore,there is an urgent need for an analysis method to predict the depth of pile running in deep coral sand formations to guide pile driving control and reduce construction risks.In this paper,high strain pile tests are conducted in deep coral reef sand formations based on actual engineering scenarios.The analysis of soil resistance values in pile running conditions in coral reef sand is carried out,and a method for predicting the distance of pile running in coral reef sand formations is proposed.Furthermore,the pile driving control method that considers the risk reduction of pile running is proposed,and it is applied to 602 driven piles on-site for risk prediction of pile running and pile driving control,and the laws of pile diving in coral reef sand stratum are summarized. |
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