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[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.[doi:10.11731/j.issn.1673-193x.2020.08.023]
 LI Huaixin,LIN Bin,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.[doi:10.11731/j.issn.1673-193x.2020.08.023]
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热力耦合作用对桩及桩间土拱效应的影响研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年8期
页码:
143-148
栏目:
职业安全卫生管理与技术
出版日期:
2020-08-31

文章信息/Info

Title:
Study on influence of thermalmechanical coupling effect on pile and soil arch effect between piles
文章编号:
1673-193X(2020)-08-0143-06
作者:
李怀鑫林斌王鹏范登政
(1.安徽理工大学 土木建筑学院,安徽 淮南 232001;
2.中铁十四局集团有限公司,山东 济南 250000)
Author(s):
LI Huaixin LIN Bin WANG Peng FAN Dengzheng
(1.School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China;
2.China Railway 14 Bureau Group Co.,Ltd.,Jinan Shandong 250000,China)
关键词:
土拱效应桩间距单排冻结管温度场数值模拟
Keywords:
soil arch effect pile spacing singlerow freezing pipe temperature field numerical simulation
分类号:
X947;TU473
DOI:
10.11731/j.issn.1673-193x.2020.08.023
文献标志码:
A
摘要:
为研究负温对桩侧应力及桩间土拱效应的影响,通过FLAC3D软件模拟热力耦合作用下新型排桩冻结法中桩间土拱效应的变化及温度效应下的桩间距,并根据巴霍尔金单排管冻结稳态温度场解析解,建立冻结壁平均温度区域解。研究结果表明:桩土接触面的应力分量τxy近似线性变化,应力分量σx近似均匀分布,温度降低对应力分量τxy的分布影响较小,但对应力分量σx的影响较大;负温使桩间距发生变化,且整体平均应力的分布也更加均匀化;通过与巴霍尔金解析解对比,证明单排管冻结温度场模型的可行性,在此基础上建立的单排管冻结壁平均温度区域解,其与数值模拟结果相差不超过1 ℃,计算误差满足工程要求;随着冻结时间的增加,单排管冻结壁温度场呈抛物线形式降低。
Abstract:
To study the influence of negative temperature on the lateral stress of pile and the soil arch effect between piles,the change of soil arch effect between piles and the pile spacing under temperature effect in the new freezing method of row piles under the thermalmechanical coupling effect were simulated by using the FLAC3D software,and the regional solution of average temperature on the freezing wall was established according to the analytical solution of steady temperature field in the freezing of Barhoergin singlerow pipe.The results showed that the stress component τxy of the pilesoil contact surface presented the approximate linear change,and the stress component σx presented the approximate uniform distribution.The temperature decrease had less influence on the distribution of stress component τxy,but had larger influence on the stress component σx.The negative temperature made the pile spacing change,and the distribution of overall average stress was more uniform.The feasibility of the singlerow pipe freezing temperature field model was proved by comparing with the Barhoergin analytical solution.On this basis,the regional solution of average temperature on the freezing wall of singlerow pipe was established,and the difference between it and the numerical simulation results was less than 1 ℃,so the calculation error could meet the engineering requirement.With the increase of freezing time,the temperature field on the freezing wall of singlerow pipe decreased with the parabolic form.

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备注/Memo

备注/Memo:
收稿日期: 2020-03-30
* 基金项目: 高校博士点专项基金项目(200803610004);安徽理工大学研究生创新基金项目(2019cx2017)
作者简介: 李怀鑫,硕士研究生,主要研究方向为岩土工程。
通信作者: 林斌,博士,教授,主要研究方向为岩土与地下工程及冻土力学。
更新日期/Last Update: 2020-09-10