一种大直径扩底桩端阻力和侧阻力的确定方法

›› 2013, Vol. 34 ›› Issue (3): 797-801.

一种大直径扩底桩端阻力和侧阻力的确定方法

高盟^{1, 2, 3}，王滢³，高广运³，顾宝和⁴，杨成斌⁵

1. 山东科技大学山东省土木工程防灾减灾重点实验室，山东青岛 266590；2. 山东科技大学土木建筑学院，山东青岛 266590；3. 同济大学岩土及地下工程教育部重点实验室，上海 430010；4. 中国建设综合勘察研究设计院，北京 100007；5. 合肥工业大学建筑设计研究院，合肥 230009

收稿日期:2012-02-03 出版日期:2013-03-11 发布日期:2013-03-20
作者简介:高盟，男，1974年生，博士（后），副教授，硕士生导师，主要从事土动力学、桩基工程及环境土工方面的研究工作

A method for determining tip and side resistances of large diameter pedestal pile

GAO Meng^{1, 2, 3}，WANG Ying³，GAO Guang-yun³，GU Bao-he ⁴，YANG Cheng-bin⁵

1. Shandong Province Key Laboratory of Civil Engineering & Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 2. College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 4. China Institute of Geotechnical Investigation and Surveying, Beijing 100007, China; 5. Institute of Architectural Design, Hefei University of Technology, Hefei 230009, China

Received:2012-02-03 Online:2013-03-11 Published:2013-03-20

摘要/Abstract

摘要： 确定大直径扩底桩承载力的最直接的方法是静力载荷试验。但由于加载的困难和试验费用高等原因，静力载荷试验往往不可行。目前进行大直径扩底桩设计时通常借用建筑桩基技术规范的经验参数法，对大直径灌注桩端阻力值和侧阻力值折减确定，容易造成大直径扩底灌注桩的承载能力得不到充分发挥。结合大直径扩底桩的规范编写，对收集的完整试桩资料进行统计分析，并参考《建筑桩基技术规范》及北京、天津、浙江、福建、广东等地方给出的经验值，最终按不同扩底直径给出了端阻承载力特征值和侧阻承载力特征值的经验值表，并与各试桩的承载力实测值以及按桩基规范确定的承载力特征值进行比较，结果表明，本文建议的大直径扩底桩端阻力特征值和侧阻力特征值具有一定的可靠性和较大的适用性。

关键词: 大直径扩底桩, 端阻力特征值, 侧阻力特征值, 试桩

Abstract: Static load test is a most direct way to determine bearing capacity of large diameter pedestal pile. Because of the difficulties in loading process and high test cost, load test is not feasible in practical engineering. In general, bearing capacity can be obtained by means of the reduction of pile tip and side resistance based on the empirical parameter method of Technical Code for Building Pile Foundation in large diameter pedestal pile design. In this way, the bearing capacity of large diameter pedestal pile can not be well used. Based on the modifying of technical specification for large-diameter pedestal cast-in-place pile foundation, the test data of piles are statistically analyzed. The characteristic value of tip resistance and shaft resistance are presented using for reference from Technical Code for Building Pile Foundation and empirical values given by local codes of Beijing, Tianjin, Zhejiang, Fujian and Guangdong. The characteristic values of tip resistance and shaft resistance given in the present paper are compared with the measured values of test pile and calculated values obtained by Technical Code for Building Pile Foundation. It is found that the characteristic values proposed in the present paper are reliable and applicable in practical engineering.

Key words: large diameter pedestal pile, characteristic value of tip resistance, characteristic value of shaft resistance, test pile

中图分类号:

TU 473

高盟，王滢，高广运，顾宝和，杨成斌 . 一种大直径扩底桩端阻力和侧阻力的确定方法[J]. , 2013, 34(3): 797-801.

GAO Meng ，WANG Ying ，GAO Guang-yun ，GU Bao-he ，YANG Cheng-bin . A method for determining tip and side resistances of large diameter pedestal pile[J]. , 2013, 34(3): 797-801.

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