| 大规模群桩基础水平承载力效应系数计算研究 |
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| 引用本文： | 贾鹏,王兰民,杨燕,刘上春.大规模群桩基础水平承载力效应系数计算研究[J].西北地震学报,2020,42(5):1202-1207. |
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| 作者姓名： | 贾鹏 王兰民 杨燕 刘上春 |
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| 作者单位： | 中铁西南科学研究院有限公司, 四川 成都 611731;中铁成都轨道交通健康管理技术有限公司, 四川 成都 611731;中国地震局兰州地震研究所, 甘肃 兰州 730000 |
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| 基金项目： | 成都地铁科技项目（DCKY-01-LHT） |
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| 摘 要： | 桩基础在水平荷载或地震作用下的承载力计算一直是工程界的一个研究难点，近年来随着建筑、桥梁桩基础的规模大幅增加，基于小规模、小比例尺群桩基础水平承载力试验得出来的结论和计算方法可能会不适应新的计算要求，相关的认识和计算方法需要重新论证和更新。本文针对大规模群桩基础水平承载力效应系数的计算问题，首先对国内外研究进展进行调研，发现现有的规范计算方法可能会高估群桩基础的水平承载力。针对这些问题，对大规模群桩基础的水平承载力效应系数进行有限元数值计算分析，探讨水平承载力效应系数的规律，给出相应的计算方法，并与规范计算方法结果进行对比。本文的研究结果可为相应的工程设计问题提供依据，结果的适用性需要今后进一步的检验。
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| 关 键 词： | 水平承载力 水平承载力效应系数 群桩基础 大规模 有限元法 规范 |
| 收稿时间： | 2019/10/1 0:00:00 |
Effect Coefficient Calculation of Horizontal Bearing Capacity of Large-scale Pile Group Foundation |
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| JIA Peng,WANG Lanmin,YANG Yan,LIU Shangchun.Effect Coefficient Calculation of Horizontal Bearing Capacity of Large-scale Pile Group Foundation[J].Northwestern Seismological Journal,2020,42(5):1202-1207. |
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| Authors: | JIA Peng WANG Lanmin YANG Yan LIU Shangchun |
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| Institution: | China Railway Southwest Research Institute Co., Ltd., Chengdu 611731, Sichuan, China;China Railway Chengdu Rail Transit Health Management Technology Co., Ltd., Chengdu 611731, Sichuan, China;Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, Gansu, China |
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| Abstract: | The bearing capacity of pile foundation under horizontal loading or earthquakes has always been a difficult point in the engineering field. In recent years, the conclusions and calculation methods based on the horizontal bearing capacity test of small-scale pile foundation may no longer meet new requirements given the considerable increase in the scale of building and bridge pile foundation. Related knowledge and calculation methods need to be updated. Thus, this paper investigated the research progress at home and abroad and found that the calculation method of the current code may overestimate the horizontal bearing capacity of pile group foundation. Then, the effect coefficient of horizontal bearing capacity of large-scale pile group foundations was analyzed by using the finite element method. The law of the effect coefficient was obtained, and the corresponding calculation method was given. Finally, the result is compared with that of the calculation method of the code. The findings can provide a basis for corresponding engineering design problems. The applicability of the results needs to be further examined in the future. |
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| Keywords: | horizontal bearing capacity effect coefficient of horizontal bearing capacity pile-group foundation large scale finite element method code |
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