高聚物锚固体与粉土间黏结性能试验研究

石明生; 夏威夷; 王复明; 刘恒; 潘艳辉

doi:10.11779/CJGE201404017

高聚物锚固体与粉土间黏结性能试验研究 English Version

石明生^{1, 2},
夏威夷¹,
王复明^{1, 2},
刘恒¹,
潘艳辉¹

1. 郑州大学水利与环境学院,河南郑州 450002; 2. 郑州大学水利与交通基础设施安全防护河南省协同创新中心,河南郑州 450002

基金项目: 国家自然科学基金项目（51179175）; 国家自然科学基金青年基金项目（51008285）

详细信息

作者简介:
石明生(1962- ),男,河南南阳人,博士,副教授,主要从事基础工程加固与高聚物注浆技术方面的研究工作。E-mail: sms315@126.com。

中图分类号: TU502.6；TU578.12
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出版历程
- 收稿日期: 2013-07-16
- 发布日期: 2014-04-21

Experimental study on bond performance between polymer anchorage body and silt

1. School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450002, China; 2. Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety Protection, Henan Province, Zhengzhou University, Zhengzhou 450002, China

摘要

摘要: 以竖向高聚物注浆锚杆为对象,对高聚物锚固体与粉土间的黏结性能进行了大量试验,详细研究了锚固体直径、密度、长度对黏结强度的影响；同时研究了不同锚固体长度下黏结应力的分布情况,及其在不同荷载作用下的变化规律。试验结果表明：钻孔孔径、锚固体密度、锚固体长度对黏结强度均有重要影响：黏结强度随锚固体密度的增大而增大,在小密度情况下增幅更为明显；黏结强度随锚固体长度的减小而增大,短锚固长度（2.5～ m）下土体的抗剪强度几乎能完全发挥,长锚固体（5 m）时仍具有较长的有效黏结长度；黏结强度基本随孔径的增加而减小。高聚物锚杆有较显著的黏结应力集中分布现象,主要黏结区域随着荷载增大逐渐向底部转移和扩大。
- 高聚物 /
- 锚固体 /
- 密度 /
- 孔径 /
- 长度 /
- 粉土 /
- 黏结强度 /
- 黏结应力分布
Abstract: The bond performance between polymer anchorage body and silt is studied through the ultimate pullout tests on vertical polymer anchors. Based on the field tests, the effects of pore size, density and length of anchorage body on the mean bond strength are investigated. Meanwhile the distribution of axial force of polymer anchor steel bars is also measured, and the distribution of bond stress between polymer anchorage body and silt under various loads is calculated subsequently. The test results show that the size, density and length of anchorage body have great impacts on the bond strength. The bond strength increases with the density and more obviously in low density. With the decreasing length of anchorage body, the bond strength increases, short anchor (2.5～ m) is optimum to exert the shear strength of soil mass, and long anchor (5 m) still has long effective bond length. The bond strength increases with the reduction of hole size. The concentrated bond stress area existing in the polymer anchor moves and widens to the bottom with the tensile load.
- polymer /
- anchorage body /
- density /
- pore size /
- length /
- silt /
- bond strength /
- distribution of bond stress

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参考文献(13)

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