[1]李兴余,沈春杨,陶雄武,等.220kV变电站场地地基单桩沉降时间效应数值模拟[J].华南地震,2024,(01):149-156.[doi:10.13512/j.hndz.2024.01.17]
 LI Xingyu,SHEN Chunyang,TAO Xiongwu,et al.Numerical Simulation of Time Effect of Single Pile Settlement of Site Foundation in 220 kV Substation[J].,2024,(01):149-156.[doi:10.13512/j.hndz.2024.01.17]
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220kV变电站场地地基单桩沉降时间效应数值模拟()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年01期
页码:
149-156
栏目:
土木工程防震减灾
出版日期:
2024-03-30

文章信息/Info

Title:
Numerical Simulation of Time Effect of Single Pile Settlement of Site Foundation in 220 kV Substation
文章编号:
1001-8662(2024)01-0149-08
作者:
李兴余1沈春杨1陶雄武1张烜梓1胡小平2舒岳水2
1.广东电网有限责任公司惠州供电局,广东 惠州 516000;2.珠海华成电力设计院股份有限公司,珠海 519000
Author(s):
LI Xingyu1SHEN Chunyang1TAO Xiongwu1ZHANG Xuanzi1HU Xiaoping2SHU Yueshui2
1.Guangdong Power Grid Co., Ltd., Huizhou Power Supply Bureau , Huizhou 516000, China;2.Zhuhai Huacheng Electric Power Design Institute Co., Ltd., Zhuhai 519000, China
关键词:
220 kV变电站场地地基单桩沉降时间效应数值模拟静荷载
Keywords:
220 kV substation Site foundation Single pile settlement Time effect Numerical simulationStatic load
分类号:
TU435
DOI:
10.13512/j.hndz.2024.01.17
文献标志码:
A
摘要:
以某地区220kV变电站场地地基单桩作为试验对象,构建桩土系统相互作用模型,利用行波分解的波动分析程序,通过拉普拉斯变换、波动分析程序和梯形积分等方法求解出相关数值,模拟静荷载作用下桩土参数、弹性模量、下层土厚度、蠕变量对220kV变电站场地地基单桩沉降时间效应的影响。试验结果表明:桩土参数对220kV变电站场地地基单桩沉降的影响较大,地基单桩周围土体受到地基单桩桩顶静荷载力作用时,随着时间增加,会发生一定幅度的沉降,当桩侧土体剪切波速最大时,短时间内单桩桩顶沉降量会趋于平稳且沉降量最小;内摩擦角和地基单桩沉降量成反比;当弹性模量增加时,单桩桩顶沉降量会随之降低;下层土厚度与沉降稳定时间成反比;蠕变量随自重应力作用时间增加而逐渐降低,当作用时间为2000d时,桩顶沉降量最大。
Abstract:
Taking the single pile of the site foundation of a 220 kV substation in a certain area as the test object, the pile-soil system interaction model is constructed,and the relevant values are solved by using the wave analysis program of traveling wave decomposition, Laplace transform, wave analysis program and trapezoidal integration methods,to simulate the influence of pile-soil parameters,elastic modulus,subsoil thickness and creep variable on the time effect of the single pile settlement of site foundation in 220 kV substation under static load. The test results show that the pile-soil parameters have a great influence on the single pile settlement of site foundation in the 220 kV substation. When the soil around the single pile of the foundation is subjected to the static load force of the single pile top of the foundation,a certain amount of settlement will occur with the increase of time. When the shear wave velocity of the pile side soil is the maximum,the settlement of the single pile top will tend to be stable and the settlement will be the minimum in a short time. The internal friction angle is inversely proportional to the settlement of single pile. When the elastic modulus increases, the settlement of single pile top will decrease. The thickness of subsoil is inversely proportional to the time of settlement stabilization. The creep variable gradually decreases with the increase of the action time of self-weight stress. When the action time is 2000 d,the settlement of the pile top is the largest.

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备注/Memo

备注/Memo:
收稿日期:2023-08-30
作者简介:李兴余(1984-),男,工程师,从事电力工程建设管理工作。E-mail:sizi677871@163.com
更新日期/Last Update: 2024-03-30