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[1]曹卫平,张作鹏,赵敏,等.桩顶荷载及温度循环对黄土地基中能量桩承载性状影响研究*[J].中国安全生产科学技术,2024,20(8):165-172.[doi:10.11731/j.issn.1673-193x.2024.08.022]
　CAO Weiping,ZHANG Zuopeng,ZHAO Min,et al.Study on influence of pile top load and temperature cycle on bearing behavior of energy pile in loess foundation[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(8):165-172.[doi:10.11731/j.issn.1673-193x.2024.08.022]
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桩顶荷载及温度循环对黄土地基中能量桩承载性状影响研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年8期
页码:
165-172
栏目:
职业安全卫生管理与技术
出版日期:
2024-08-30

文章信息/Info

Title:
Study on influence of pile top load and temperature cycle on bearing behavior of energy pile in loess foundation
文章编号:
1673-193X(2024)-08-0165-08
作者:
曹卫平; 张作鹏; 赵敏; 李清源; 何展朋
(1.西安建筑科技大学 土木工程学院，陕西 西安 710055；
2.西安工业大学 建筑工程学院，陕西 西安 710021)
Author(s):
CAO Weiping;  ZHANG Zuopeng;  ZHAO Min;  LI Qingyuan;  HE Zhanpeng
(1.School of Civil Engineering,Xi’an University of Architecture & Technology,Xi’an Shaanxi 710055,China;
2.School of Civil & Architecture Engineering,Xi’an Technological University,Xi’an Shaanxi 710021,China)
关键词:
能量桩; 黄土; 模型试验; 温度循环; 桩土荷载传递函数
Keywords:
energy pile;  loess;  model test;  temperature cycling;  pile-soil load transfer function
分类号:
X947；TU473.1
DOI:
10.11731/j.issn.1673-193x.2024.08.022
文献标志码:
A
摘要:
为对比分析未经过温度循环的普通桩与能量桩竖向承载变形性状，开展黄土地基中能量桩温度循环试验。模型桩为现浇钢筋混凝土灌注桩，黄土为人工配制重塑黄土。研究结果表明：温度循环弱化黄土地基中能量桩桩身侧阻、增强能量桩桩底端阻，温度循环过程中桩顶工作荷载越大，桩侧阻的弱化作用及桩端阻的增强作用越大，这导致能量桩的竖向抗压承载力比普通桩有明显的提高。另外，根据模型试验结果，通过数据拟合建立桩土界面摩阻力-桩土相对位移及桩端土反力-桩端沉降双曲线函数模型，并确定模型参数，其函数计算结果与试验结果对比表明本文模型能合理反映温度循环及桩顶工作荷载大小对桩基承载力的影响。研究结果可为黄土地区能量桩的安全设计提供一定参考。
Abstract:
In order to compare and analyze the vertical bearing deformation behavior of ordinary pile and energy pile without temperature cycle,the temperature cycling test of energy piles in loess foundation was carried out.The model piles were the cast-in-place reinforced concrete filling piles,and the loess was the artificially prepared remodeling loess.The results show that the temperature cycle weakens the lateral resistance of energy pile body in the loess foundation,and enhances the end resistance of energy pile.The greater the working load at the pile top during the temperature cycle,the greater the weakening effect of pile side resistance and the enhancement effect of pile end resistance,which leads to a significant increase in the vertical compressive bearing capacity of energy pile compared with that of ordinary pile.In addition,according to the results of model test,the hyperbolic function model of the pile-soil interface friction resistance with pile-soil relative displacement and the pile end soil reaction force with pile-end settlement was established through data fitting,and the model parameters were determined.The comparison between the calculation results of the hyperbolic load transfer function and the experimental results presents that the proposed model can reasonably reflect the influence of temperature cycle and working load on pile top on the bearing capacity of pile foundation.The research results can provide some reference for the safety design of energy piles in loess area.

参考文献/References:

［1］李怀鑫,林斌,王鹏，等.热力耦合作用对桩及桩间土拱效应的影响研究［J］.中国安全生产科学技术,2020,16(8):143-148. LI Huaixin,LIN Peng,WANG Peng,et al.Study on influence of thermal-mechanical coupling effect on pile and soil arch effect between piles［J］.Journal of Safety Science and Technology,2020,16(8):143-148.
［2］范长新,温智,王旭，等.人工冻结法调控多年冻土区桩基础地温场的效果分析［J］.中国安全生产科学技术,2022,18(8):106-113. FAN Changxin,WEN Zhi,WANG Xu,et al.Effect analysis of artificial freezing method to regulate ground temperature field of pile foundation in permafrost regions［J］.Journal of Safety Science and Technology,2022,18(8):106-113.
［3］陈志雄,甘丰嘉,王成龙,等.温度影响下能量桩-土接触面剪切特性试验研究［J］.土木与环境工程学报(中英文),2024,46(3):16-23. CHEN Zhixiong,GAN Fengjia,WANG Chenglong,et al.Experimental study on shear behavior of energy pile-soil interface affected by temperature［J］.Journal of Civil and Environmental Engineering,2024,46(3):16-23.
［4］李春红,孔纲强,刘汉龙,等.桩-红黏土接触面温控测试及应力-应变关系研究［J］.土木工程学报,2019,52(增刊2)：89-94，101. LI Chunhong,KONG Gangqiang,LIU Hanlong,et al.Study of temperature-controlled pile-red clay interface tests and stress-strain relationship［J］.China Civil Engineering Journal,2019,52(Supplement 2)：89-94,101.
［5］李春红,孔纲强,车平,等.能量桩桩-土接触面力学特性室内试验研究［J］.建筑节能,2016,44(3):99-105. LI Chunhong,KONG Gangqiang,CHE Ping,et al.Laboratory experimental on interface mechanical properties of energy pile-soil ［J］.Building Energy Efficacy,2016,44(3):99-105.
［6］SAEED Y,SAM H,GUNEY O.Investigation of thermal loading effects on shaft resistance of energy pile using laboratory-scale model［J］.Journal of Geotechnical and Geoenvironmental Engineering,2019,145(9):04019043.
［7］XIAO S G,MUHANNAD T S,REHAB E,et al.Effect of temperature and radial displacement cycles on soil-concrete interface properties using modified thermal borehole shear test ［J］.Journal of Geotechnical and Geoenvironmental Engineering,2018,144(7):04018036.
［8］MOHAMMED F,ABDELMALEK B,CHRIS H,et al.Axial and radial thermal responses of a field-scale energy pile under monotonic and cyclic temperature changes ［J］.Journal of Geotechnical and Geoenvironmental Engineering,2018,144(10):04018072.
［9］NG C W W,SHI C,GUNAWAN A,et al.Centrifuge modelling of heating effects on energy pile performance in saturated sand ［J］.Canadian Geotechnical Journal,2015,52(8):1045-1057.
［10］REHAB E,MUHANNAD T S.Pull-out response of a laboratory-scale energy pile subjected to cooling cycles ［J］.Journal of Geotechnical and Geoenvironmental Engineering,2021,147(7):04021044.
［11］SONG H B,PEI H F.A nonlinear softening load-transfer approach for the thermomechanical analysis of energy piles［J］.International Journal of Geomechanics,2022,22(5):1-14.
［12］CRAIG W H,SABAGH S K.Stress-level effects in model tests on piles［J］.Canadian Geotechnical Journal,1994,31(1):28-41.
［13］席宁中,刘金砺,席婧仪.桩端土刚度对桩侧阻力影响的数值分析［J］.岩土工程学报,2011,33(增刊2):174-177. XI Ningzhong,LIU Jinli,XI Jingyi.Numerical analysis of influence of stiffness of pile tip soil on shaft resistance［J］.Chinese Journal of Geotechnical Engineering,2011,33(Supplement 2):174-177.
［14］BURLAND J B.Shaft friction of piles in clay-a simple fundamental approach［J］.Ground Engineering,1973,6(3):30-42.
［15］CHANDLER R J.The shaft friction of piles in cohesive soils in terms of effective stresses［J］.Civil Engineering and Public Works Review,1968,63:48-51.

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备注/Memo

备注/Memo:
收稿日期： 2024-02-01
* 基金项目： 陕西省自然科学基础研究计划一般面上项目（2024JC-YBMS-299）
作者简介： 曹卫平，博士，教授，主要研究方向为岩土工程。
通信作者： 张作鹏，硕士研究生，主要研究方向为岩土工程。
更新日期/Last Update: 2024-08-26