考虑钢护筒效应的混合桩水平承载性能分析

穆保岗; 班笑; 龚维明

doi:10.11835/j.issn.1674-4764.2011.03.013

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考虑钢护筒效应的混合桩水平承载性能分析

更新时间：2023-11-28

- 考虑钢护筒效应的混合桩水平承载性能分析
- Lateral Load Capacity Analysis of Variable Section Hybrid Piles with Wteel Casing
- 土木与环境工程学报（中英文） 2011年33卷第3期页码：68-73
- 作者机构：
  
  1. 东南大学土木工程学院,南京,21009
  2. 帝国理工学院土木环境工程系,伦敦,SW7 2AZ
- 作者简介：
- 基金信息：
  
  国家科技支撑计划课题(2011BAG07B01)
- DOI：10.11835/j.issn.1674-4764.2011.03.013
  中图分类号：
- 纸质出版：2011
- 稿件说明：
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穆保岗, 班笑, 龚维明. 考虑钢护筒效应的混合桩水平承载性能分析[J]. 土木与环境工程学报（中英文）, 2011,33(3):68-73.

MU Bao-gang, BAN Xiao, GONG Wei-ming. Lateral Load Capacity Analysis of Variable Section Hybrid Piles with Wteel Casing[J]. Journal of Civil and Environmental Engineering, 2011, 33(3): 68-73.
穆保岗, 班笑, 龚维明. 考虑钢护筒效应的混合桩水平承载性能分析[J]. 土木与环境工程学报（中英文）, 2011,33(3):68-73. DOI： 10.11835/j.issn.1674-4764.2011.03.013.

MU Bao-gang, BAN Xiao, GONG Wei-ming. Lateral Load Capacity Analysis of Variable Section Hybrid Piles with Wteel Casing[J]. Journal of Civil and Environmental Engineering, 2011, 33(3): 68-73. DOI： 10.11835/j.issn.1674-4764.2011.03.013.

摘要

深水桥梁基础施工时的钢护筒

在钻孔灌注桩施工完毕后保留

桩体实际上形成了“上大下小”的变截面混合桩.采用非线性的NL法比较了苏通大桥的钻孔灌注桩在考虑钢护筒效应和忽略钢护筒效应这两种工况下基桩位移和内力分布

结果表明考虑钢护筒效应可减少桩顶位移约50%

在准确计算水平荷载下的变形时不能忽略；制作并进行了8个构件的模型试验

表明施工泥皮厚度将显著影响水平荷载下的钢护筒和内部桩体的共同作用能力.

Abstract

With the construction of deep-water bridge foundation

steel casing is left after the construction of cast-in place piles due to the dismantle difficulty. Then the pile actually forms a variable section pile which has bigger section area at upper part. Using the nonlinear NL method

the displacement and the internal force are analyzed for piles with and without casing in Sutong Bridge. It is found that the displacement of pile with casing can be reduced by 50%

and it can not be ignored for accurate calculation of displacement. 8 model pile tests are carried out

which suggests that the slurry thickness can significantly affect the capability of co-working between the pile and the casing.

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