| 厚冲积覆盖层地区桥梁钻孔灌注桩成孔的力学分析 |
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| 引用本文： | 胡晓敏,李之达.厚冲积覆盖层地区桥梁钻孔灌注桩成孔的力学分析[J].武汉理工大学学报(交通科学与工程版),2007,31(4):734-737. |
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| 作者姓名： | 胡晓敏 李之达 |
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| 作者单位： | 1. 武汉科技大学中南分校城建学院,武汉,430223
2. 武汉理工大学交通学院,武汉,430063 |
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| 摘 要： | 通过成孔过程中的孔边应力分析,得到桩孔孔边应力的解析表达式,表明适当深度的泥浆护壁可以缓解孔边应力.通过对成孔过程的破坏分析,提出了桩孔中泥浆最小、最大深度的概念,并依此判断孔壁稳定性.通过调整泥浆的深度,可以有效地防止桩孔坍塌;当钻进到某一高程,桩孔中所要求的泥浆最大深度小于最小深度要求时,建议采取护筒护壁措施.运用上述成孔力学分析方法进行设计、施工组织、准备和施工,可以确保施工安全和工程质量,为桩基础的设计、施工提供必要的理论基础.
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| 关 键 词： | 冲积覆盖层 钻孔灌注桩 成孔 塌孔 |
| 修稿时间： | 2007-02-13 |
Hole Forming Mechanics Analysis of the Bored Filling Pile on the Bridges in Alluviation Overburden Area |
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| Hu Xiaomin,Li Zhida.Hole Forming Mechanics Analysis of the Bored Filling Pile on the Bridges in Alluviation Overburden Area[J].journal of wuhan university of technology(transportation science&engineering),2007,31(4):734-737. |
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| Authors: | Hu Xiaomin Li Zhida |
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| Institution: | School of Civil Engineering, Wuhan University of Science and Technology Zhongnan Branch, Wuhan 430223;School of Transportation, Wuhan University of Technology, Wuhan 430063 |
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| Abstract: | By analysis of the hole side stress during the construction,the expression of the hole side stress is got,which shows the proper depth of mud can decrease the hole side stress.Through analysis of hole collapsing during the construction,the concept of the minimum and maximum depth of mud in the hole is put forward.It can be used to judge the stability of the hole wall.Adjust the depth of the mud can avoid the hold from collapsing.But when holing in a certain height that the maximum mud height is less than the minimum mud height,take the cylinder to project the hole.Using the above mentioned mechanics method to design,organize,plan and construct the engineering can ensure the construction safety,smooth and the project quality,which offers the design and construction essential theoretical foundation. |
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| Keywords: | thick alluvium covered area bored filling pile hole forming hole collapsing |
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