摘要
能源桩作为一种新型桩基础形式,通过将换热管材埋于桩中与周围岩土体进行热交换,其承载特性受温度-荷载共同作用而不同于常规桩。有限的现场原位试验测试数据不足以全面的反应能源桩在不同约束条件下的承载性能;因此高效而准确的数值模拟方法的应用,将为能源桩受力特性的分析带来极大的便利。基于理想弹塑性桩-土荷载传递准则,应用数值模拟的方式对能源桩受力特性进行了分析;通过改变桩顶及桩端约束、桩周土体强度、上部结构荷载情况,调查了能源桩在温度荷载作用下的轴向应力,桩侧摩阻力及桩-土相对滑动位移等的变化,以期加深对能源桩受力特性规律的认识。
Energy pile is a new pile foundation.Heat exchange tubes are buried in energy piles to exchange heat with surrounding rock and soil and their load-bearing characteristics are different from common piles due to common effects of temperature-load.The limited in-situ test data on site is not enough to comprehensively reflect the load-bearing performance of energy piles under different constraint conditions.Therefore,the application of efficient and accurate numerical simulation method will greatly facilitate the analysis of load-bearing characteristics of energy piles.Based on ideal elastoplastic pile-soil load transfer criterion,the load-bearing characteristics of energy piles are analyzed by numerical simulation method.Through changing the restrictions on pile blocks and pile tips,soil strength surrounding piles and superstructure load,the change of the axial stress of energy piles under the temperature load,frictional resistance of pile side and relative sliding displacement of pile-soil is investigated,to deepen the understanding of load-bearing characteristic rules of energy piles.
作者
郭浩然
乔兰
王茜
GUO Hao-ran;QIAO Lan;WANG Qian(Department of Civil Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《科学技术与工程》
北大核心
2018年第26期128-134,共7页
Science Technology and Engineering
基金
中央高校基本科研业务费专项资金(FRF-TP-15-106A1)资助
关键词
能源桩
数值分析
承载力
温度-荷载共同作用
energy pile
numerical analysis
bearing capacity
thermo-mechanical combined action
