考虑土体连续性的桩承载力自平衡法研究及工程试验

doi:10.12068/j.issn.1005-3026.2022.09.016

东北大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (9): 1329-1336.DOI: 10.12068/j.issn.1005-3026.2022.09.016

考虑土体连续性的桩承载力自平衡法研究及工程试验

王述红¹，石运昊¹，阿力普江·杰如拉²，姜鉴晖¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819; 2. 新疆大学建筑工程学院，新疆乌鲁木齐830017)

发布日期:2022-09-16
通讯作者: 王述红
作者简介:王述红(1969- )，男，江苏泰州人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(U1602232)；中央高校基本科研业务费专项资金资助项目( N170108029 )；辽宁省重点研发计划项目(2019JH2/10100035).

Research on the Self-balanced Method of Pile Bearing Capacity Considering Soil Continuity and Engineering Test

WANG Shu-hong¹， SHI Yun-hao¹， ALIPUJIANG Jierula²， JIANG Jian-hui¹

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. College of Architecture & Civil Engineering， Xinjiang University， Urumqi 830017， China.

Published:2022-09-16
Contact: WANG Shu-hong
About author:-
Supported by:
-

摘要/Abstract

摘要： 自平衡试桩法因其具有方便、经济等优势而被推广起来，但目前关于该方法转换成静载法荷载-位移曲线过程中涉及到的转换系数的研究较少.在对比研究自平衡试桩法与传统单桩竖向抗压静载试验方法的基础上，依据Mindlin解，对未考虑土体连续性时转换后得到的自平衡试桩桩顶位移与实际结果的差异进行分析，研究砂土地区试桩中的上托桩桩周土体位移对桩端沉降变化的影响，进而对现有确定自平衡试桩承载力的转换方法进行改进.通过室内模拟试验验证了该方法的可行性，将此方法应用到沈阳某高层桩基础工程试验中，发现采用考虑土体连续性的自平衡转换方法明显降低了荷载-位移曲线的拟合误差.

关键词: 桩基础；土体连续性；堆载法；自平衡法；承载力

Abstract: The self-balanced test pile method is gradually popularized due to its convenience and economy. However， few studies were focused on the conversion coefficient involved in the process of converting this method into the static load-displacement curve. Because the settlement on the pile top is affected by soil continuity， the displacement difference on the pile top of the self-balanced test pile and the static load pile were analyzed using the Mindlin′s formula based on the comparative study of the self-balanced test pile method and the traditional vertical compression static load test method of single pile. An equivalent conversion method to determine the bearing capacity of self-balanced test pile was proposed in order to improve the empirical formula. The rationality of the improved method was verified by indoor simulation test as well as pile foundation engineering test of a super high-rise building in Shenyang. It is found that the self-balance conversion method taking the soil continuity in to account can significantly reduced the fitting error of the load-displacement curve.

Key words: pile foundation; soil continuity; stack method; self-balanced method; bearing capacity

中图分类号:

TP20

王述红，石运昊，阿力普江·杰如拉，姜鉴晖. 考虑土体连续性的桩承载力自平衡法研究及工程试验[J]. 东北大学学报（自然科学版）, 2022, 43(9): 1329-1336.

WANG Shu-hong， SHI Yun-hao， ALIPUJIANG Jierula， JIANG Jian-hui. Research on the Self-balanced Method of Pile Bearing Capacity Considering Soil Continuity and Engineering Test[J]. Journal of Northeastern University(Natural Science), 2022, 43(9): 1329-1336.

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考虑土体连续性的桩承载力自平衡法研究及工程试验

Research on the Self-balanced Method of Pile Bearing Capacity Considering Soil Continuity and Engineering Test

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