| 沉管对接端深基坑支撑拆除受力分析 |
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| 引用本文： | 仇正中,韩鹏鹏,刘陪阳.沉管对接端深基坑支撑拆除受力分析[J].港工技术,2022,59(1):104-108. |
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| 作者姓名： | 仇正中 韩鹏鹏 刘陪阳 |
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| 作者单位： | 中交第二航务工程局有限公司,湖北武汉,430040;长大桥梁建设施工技术交通行业重点实验室,湖北武汉,430040;交通运输行业交通基础设施智能制造技术研发中心,湖北武汉,430040,中交第二航务工程局有限公司,湖北武汉,430040;中交第二航务工程局有限公司第五工程分公司,湖北武汉,430040 |
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| 摘 要： | 为确定沉管对接端深基坑支撑拆除方案,运用数值分析软件Abaqus模拟回水至支撑下部,水上顺序拆除支撑,剩余支撑受力及土体位移变化情况.研究表明:回水至支撑下部拆除支撑方案可行.拆除过程中,钢支撑轴力最大值2407 kN,钢筋混凝土支撑轴力最大值5328 kN,土体深层水平位移最大值15.5 mm,均能满足设计要求.计算...
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| 关 键 词： | 沉管对接端 深基坑 数值模拟 深层水平位移 回水拆撑 |
Stress Analysis of Removed Support in Deep Foundation Pit at Butt-joint of Immersed Tube Tunnel |
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| Qiu Zhengzhong,Han Pengpeng,Liu Peiyang.Stress Analysis of Removed Support in Deep Foundation Pit at Butt-joint of Immersed Tube Tunnel[J].Port Engineering Technology,2022,59(1):104-108. |
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| Authors: | Qiu Zhengzhong Han Pengpeng Liu Peiyang |
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| Institution: | (CCCC Second Harbor Engineering Co.,Ltd.,Wuhan Hubei 430040,China;Fifth Engineering Branch of CCCC Second Harbor Engineering Co.,Ltd.,Wuhan Hubei 430040,China;Key laboratory of Large-span Bridge Construction Technology,Ministry of Transport,Wuhan Hubei 430040,China;Research and Development Center of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan Hubei 430040,China) |
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| Abstract: | In order to determine the removal plan for the internal support of deep foundation pit at butt-joint of immersed tube tunnel, the numerical analysis software Abaqus was used to simulate the displacement of soil body and the stress acting on the remaining support when water back-flowed to the lower part of the support and the support was removed orderly. The research result shows that it is accepted to remove the support when water back-flows to the lower part of the support. In the process of support removal, the maximum axial force on steel support reaches 2 407 kN, the maximum axial force on RC support is 5 328 kN and the maximum horizontal displacement of soil body at deep layer is 15.5 mm, which meet the design requirements. The above calculation results will provide a theoretical basis for the plan of support removal of deep foundation pit at butt-joint of immersed tube tunnel. |
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| Keywords: | butt-joint of immersed tube tunnel deep foundation pit numerical simulation horizontal displacement of pile at deep layer support removal under backwater |
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