| 温度变化对深基坑钢管支撑温度效应影响分析 |
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| 引用本文： | 陆善佳.温度变化对深基坑钢管支撑温度效应影响分析[J].岩土工程技术,2020(1):39-42. |
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| 作者姓名： | 陆善佳 |
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| 作者单位： | 上海市城市建设设计研究总院（集团）有限公司 |
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| 摘 要： | 在基坑围护工程中,大量使用内支撑结构体系,在支撑体系中采用最多的是钢管支撑,因为其属于金属材料,温度变化对支撑结构的影响不容忽视。基于弹性热力学基本原理推导出空心圆筒热应力公式,同时考虑了围护墙的侧向水平位移,定量分析变温对基坑钢管支撑轴力影响,实测轴力值及数值解验证了计算公式的正确性。结果表明:解析解大于数值解,且解析解大于实测值,偏于保守,但差值不大可作为设计安全储备,便于工程师在今后设计过程中作为参考实例。
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| 关 键 词： | 深基坑 温度效应 钢支撑 支撑轴力 |
Influence of Temperature Change on Temperature Effect ofSteel Shotcrete for Deep Excaration |
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| Lu Shanjia.Influence of Temperature Change on Temperature Effect ofSteel Shotcrete for Deep Excaration[J].Geotechnical Engineering Technique,2020(1):39-42. |
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| Authors: | Lu Shanjia |
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| Institution: | (Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai 200120,China) |
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| Abstract: | In the foundation pit enclosure engineering,a large number of internal support structure systems are used,and the steel shotcrete is the most widely used in the support system.Steel shotcrete is a metal material,and the influence of temperature change on the support structure cannot be ignored.Based on the basic principles of elastic thermodynamics,the thermal stress formula of the hollow cylinder is deduced,and the lateral horizontal displacement of the surrounding structure is considered.The influence of temperature change on the axial force of the steel shotcrete is analyzed quantitatively,and the calculation formula is verified through the measured axial force value and numerical solution.The results show that the analytical solution is larger than the numerical solution,and larger than the measured value,which is conservative.This calculation formula with minor error could be used as a safety reserve for engineering design,which is a reference in the future design. |
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| Keywords: | deep excavation temperature effect steel shotcrete axial force of support |
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