›› 2016, Vol. 37 ›› Issue (S2): 294-300.doi: 10.16285/j.rsm.2016.S2.036

• 基础理论与实验研究 • 上一篇    下一篇

毛竹微型桩支护浅基坑模型试验

邓友生1, 4,王 欢1,杨 敏2,靳军伟3,梅靖宇1,吴 鹏1,刘 娟1   

  1. 1.湖北工业大学 土木工程与建筑学院,湖北 武汉 430068;2.同济大学 岩土及地下工程教育部重点实验室,上海 200092; 3.郑州大学 土木工程学院,河南 郑州 450002;4.中国科学院武汉岩土力学研究所,湖北 武汉 430071
  • 收稿日期:2016-04-29 出版日期:2016-11-11 发布日期:2018-06-09
  • 作者简介:邓友生,男,1969年生,博士,教授,博士生导师,从事岩土工程方面的科研和教学工作。
  • 基金资助:
    国家自然科学基金(No. 51378182)

Model tests on shallow excavation support through bamboo micro-piles

DENG You-sheng1, 4, WANG Huan1, YANG Min2, JIN Jun-wei3, MEI Jing-yu1, WU Peng1, LIU Juan1   

  1. 1.School of Civil Engineering & Architecture, Hubei University of Technology, Wuhan, Hubei 430068, China; 2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3 School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China; 4. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
  • Received:2016-04-29 Online:2016-11-11 Published:2018-06-09
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(51378182).

摘要: 毛竹是一种高强环保建筑材料,可以解决传统浅基坑支护成本高和后期临时结构的拆除费用等问题。开展竹管桩抗弯试验与单排微型竹桩模型试验研究,结果表明,压弯试验中随着竹桩自身净截面积的增加,其弹性模量逐渐减小,竹桩的弹性模量主要分布在8.0~12.5 GPa;模型试验中桩身应变随着埋深逐渐增加直至峰值,之后逐渐衰减为0,在到达0后出现反向应变,反向应变达到峰值后衰减为0。根据试验中桩身应变和桩顶侧移结果可知,浅基坑支护中使用单排微型竹桩能取得较好的支护效果。研究结果可为浅基坑竹桩支护作用机制和工程设计提供参考。

关键词: 浅基坑, 毛竹微型桩, 模型试验, 抗弯试验, 应变

Abstract: Bamboo is a kind of high strength and environmental protection building materials that can be used to solve the problems of high cost for both traditional shallow excavation supported and the temporary structure removed. The bamboo pile bending test and the single row bamboo micro-piles model tests were put foreword. The results show that the elastic modulus of bamboo pile decreases gradually with increase of the net cross-sectional area in the bending test; the elastic modulus is mainly distributed in 8.0-12.5 GPa. In model test, the strain of pile increases gradually up to peak with the increase of the depth and then gradually decays to 0. The reverse strain appears after reaching 0; and then the reverse strain decays to 0 after reaching the peak. According to the results of strain of pile and displacement of pile top, the use of single row bamboo micro-piles can get better support effect in the support of shallow foundation pit. The research results would provide experimental basis for studying the supporting mechanism of the single row bamboo piles and provide a reference for engineering design as well.

Key words: shallow excavation, bamboo micro-piles, model test, bending test, strain

中图分类号: 

  • TU 472
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