| 热-力耦合作用下能源群桩工作特性的数值模拟 |
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| 引用本文： | 董龙龙,梅国雄,吴文兵,王立兴,阮恒丰.热-力耦合作用下能源群桩工作特性的数值模拟[J].地质科技通报,2021,40(6):326-334. |
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| 作者姓名： | 董龙龙 梅国雄 吴文兵 王立兴 阮恒丰 |
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| 基金项目： | 国家自然科学基金项目51678547国家自然科学基金项目51878634浙江省自然科学基金杰出青年项目LR21E080005 |
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| 摘 要： | 为研究能源群桩工作特性，基于Abaqus有限元模拟，将换热稳定阶段的平均温度赋予桩体进行稳态热-力耦合计算，提出了能源群桩承载特性的简化分析方法，并通过与现场数据的对比分析，验证了该研究方法的可行性。结合算例，进一步利用该方法对纯力学荷载和热-力耦合作用下的能源群桩的承载特性进行了分析。结果表明:①群桩基础中能源桩分散对称分布的不均匀沉降要明显小于集中分布，而且分布形式对桩基结构响应特征影响较大；②桩基等刚度下，增大桩径和减小桩间距，群桩倾斜控制效果较好。研究成果可以为能源群桩的工程应用提供一定的参考。
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| 关 键 词： | 能源群桩 数值模拟 热-力耦合 不均匀沉降 Abaqus |
| 收稿时间： | 2021-03-01 |
Numerical simulation of working characteristics of energy pile group under thermo-mechanical coupling |
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| Abstract: | In order to study the working characteristics of energy pile groups, based on the Abaqus finite element simulation, assigns the average temperature of the heat transfer stable stage to the pile body for steady-state thermo-mechanical coupling calculation, and proposes a simplified analysis method for the bearing characteristics of energy pile groups.The reliability of this research method is verified through the comparative analysis with field data.Combined with an example, this method is used to analyze the bearing characteristics of energy group piles under the action of pure mechanical load and thermal coupling.The results show that the non-uniform settlement of the distributed symmetrical arrangement of energy piles in the pile group foundation is significantly less than that of the centralized arrangement, and the layout has a great influence on the response characteristics of the pile foundation structure.Under the condition of equal stiffness of pile foundation, the control effect of pile group tilt is better by increasing pile diameter and decreasing pile spacing.The research results of this paper can provide some reference value for the engineering application of energy pile group. |
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