| 深基坑中装配式钢支撑围檩强度优化的数值模拟 |
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| 引用本文： | 刘涛,谷志强,林森林,刘召亮,徐海涛,袁长丰.深基坑中装配式钢支撑围檩强度优化的数值模拟[J].低温建筑技术,2021,43(1):98-100,110. |
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| 作者姓名： | 刘涛 谷志强 林森林 刘召亮 徐海涛 袁长丰 |
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| 作者单位： | 中国冶金地质总局青岛地质勘查院,山东青岛266109;青岛第一市政工程有限公司,山东青岛266034;青岛理工大学土木工程学院,山东青岛266033 |
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| 基金项目： | 国家自然科学基金(51174124);山东省自然科学基金(ZR2017MEE017);山东省重点研发计划(公益类专项)(2018GSF120005)。 |
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| 摘 要： | 深基坑支护体系的稳定对工程安全至关重要。针对装配式围檩在施工过程中的微小形变导致预应力消散问题,通过改变围檩钢板厚度以及注入微膨胀混凝土,并基于Midas GTS对比分析了装配式围檩强度变化特征。结果表明采取在钢围檩中灌注微膨胀混凝土、增强钢围檩刚度等措施,能够极大的提高围檩抵抗塑性变形的能力,确保钢支撑的承载力达到预应力设计值,保障了深基坑的安全施工。
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| 关 键 词： | 深基坑 装配式围檩 强度优化 数值模拟 |
NUMERICAL SIMULATION OF STRENGTH OPTIMIZATION OF PREFABRICATED STEEL SUPPORTS ENCLOSING PURLIN IN DEEP FOUNDATION PITS |
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| LIU Tao,GU Zhiqiang,LIN Senlin,LIU Zhaoliang,XU Haitao,YUAN Changfeng.NUMERICAL SIMULATION OF STRENGTH OPTIMIZATION OF PREFABRICATED STEEL SUPPORTS ENCLOSING PURLIN IN DEEP FOUNDATION PITS[J].Low Temperature Architecture Technology,2021,43(1):98-100,110. |
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| Authors: | LIU Tao GU Zhiqiang LIN Senlin LIU Zhaoliang XU Haitao YUAN Changfeng |
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| Affiliation: | (Qingdao Geological Survey Institute of China Metallurgical Geology Bureau,Shandong Qingdao 266109,China;Qingdao First Municipal Engineering Co.,Ltd.,Shandong Qingdao 266034,China;School of Civil Engineering,Qingdao University of Technology,Shandong Qingdao 266033,China) |
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| Abstract: | The stability of the deep foundation pit supporting system is very important to engineering safety.The slight deformation of fabricated enclosing purlin in the construction process results in the prestress dissipation,by changing the thickness of the enclosing purlin steel plate and injecting the micro-expansion concrete,the strength change characteristics of the fabricated enclosing were compared and analyzed based on Midas GTS.The results show that the measures such as filling micro-expansive concrete in steel enclosing purlin and strengthening the stiffness of steel enclosing purlin can greatly improve the resistance capacity of steel enclosing purlin to plastic deformation,ensure the bearing capacity of steel support reaches the pre-stressed design value,and guarantee the safety construction of deep foundation pit. |
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| Keywords: | deep foundation pit fabricated enclosing purlin strength optimization numerical simulation |
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