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浙江大学学报(工学版)
浙江大学学报(工学版)
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静钻根植竹节桩荷载传递机理模型试验
周佳锦1,2,龚晓南1,2,王奎华1,2,张日红3,严天龙3
1. 浙江大学 滨海与城市岩土工程研究中心,浙江 杭州 310058； 2. 浙江大学 软弱土与环境土工教育部重点实验室,浙江 杭州 310058； 3. 浙东建材集团,浙江 宁波 315000
Model test on load transfer mechanism of a static drill rooted nodular pile
ZHOU Jia-jin1,2, GONG Xiao-nan1,2, WANG Kui-hua1,2, ZHANG Ri-hong3 , YAN Tian-long3
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 3. ZDOON Building Materials Group, Ningbo 315000, China
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摘要：

针对静钻根植竹节桩这种新型组合桩基的荷载传递机理的问题,在模型槽中进行竹节桩的模型试验.通过埋设在竹节桩表面与水泥土中的应变片及桩底的土压力传感器对加载过程中桩身、桩端以及水泥土中的应力进行测量.模型试验结果表明：桩侧水泥土与桩端水泥土在荷载传递过程中所起作用不同,靠近桩端水泥土处桩侧水泥土中应力较大,在实际工程中需要提高该区域水泥土强度；模型试验测得的水泥土与桩周土极限侧摩阻力比现场试桩水泥土与桩周土的极限侧摩阻力大,在实际工程中搅拌水泥土时应提高搅拌均匀性以增加桩侧摩阻力；可以用传统桩基沉降计算公式计算静钻根植竹节桩的桩端沉降.
Abstract:

For investigating the load transfer mechanism of the nodular pile, a model test of the pile was conducted in the model box. The axial force of the nodular pile and the mobilized base load were measured by the strain gauges attached on the pile shaft and the soil pressure sensors underneath the pile base respectively,while the stress in the cemented soil was measured with the help of the Polyvinylchlorid （PVC） pipe on which the strain gauges were attached. The experimental results show that: the function of the cemented soil along the shaft is different from that of the cemented soil at the enlarged pile base; the stress in the cemented soil along the shaft is enlarged suddenly when approaching the pile base, thus the cemented soil at this area should be strengthened in actual projects; the ultimate skin friction of the model pile is larger than the skin friction in the field test, thus the skin friction should be improved by increasing the homogeneity of the cemented soil in actual projects; the theoretical tip displacement-tip load curves of traditional pile foundation can be applied for the nodular pile．
出版日期: 2014-10-01
基金资助:

国家自然科学基金资助项目（51278450）；国家自然科学基金资助项目（51378464）
通讯作者: 龚晓南，男，教授，博导     E-mail: xngong@hzcnc.com
作者简介: 周佳锦(1989- )，男，博士生，主要从事桩基工程、地基处理及基坑工程等方面的研究工作.E-mail: zjjmuforever@163.com
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引用本文:

周佳锦,龚晓南,王奎华,张日红,严天龙. 静钻根植竹节桩荷载传递机理模型试验[J]. 浙江大学学报(工学版), TU 47.

ZHOU Jia-jin, GONG Xiao-nan, WANG Kui-hua, ZHANG Ri-hong, YAN Tian-long. Model test on load transfer mechanism of a static drill rooted nodular pile. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), TU 47.

链接本文:

http://www.zjujournals.com/eng/CN/TU 47    或    http://www.zjujournals.com/eng/CN/Y2014/V48/I10/2

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