预制桩波速随时间增长的试验现象及分析

张明义 章伟

doi:10.11835/j.issn.1674-4764.2006.06.016

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预制桩波速随时间增长的试验现象及分析

更新时间：2023-11-28

- 预制桩波速随时间增长的试验现象及分析
- Increase of Wave Velocity in Precast Pile along with Time and Its Analysis
- 土木与环境工程学报（中英文） 2006年28卷第6期页码：62-64105
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- DOI：10.11835/j.issn.1674-4764.2006.06.016
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- 纸质出版：2006
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张明义章伟. 预制桩波速随时间增长的试验现象及分析[J]. 土木与环境工程学报（中英文）, 2006,28(6):62-64105.

Increase of Wave Velocity in Precast Pile along with Time and Its Analysis[J]. Journal of Civil and Environmental Engineering, 2006, 28(6): 62-64105.
张明义章伟. 预制桩波速随时间增长的试验现象及分析[J]. 土木与环境工程学报（中英文）, 2006,28(6):62-64105. DOI： 10.11835/j.issn.1674-4764.2006.06.016.

Increase of Wave Velocity in Precast Pile along with Time and Its Analysis[J]. Journal of Civil and Environmental Engineering, 2006, 28(6): 62-64105. DOI： 10.11835/j.issn.1674-4764.2006.06.016.

摘要

通过实际工程的低应变桩基动测，发现打入桩的波速随时间提高。用一维和三雏应力波传播理论进行了分析。评价了影响桩的波速的各种因素，认为被测桩波速的提高主要是由于桩侧土的贡献造成的。桩侧土和桩共同工作，就象是加大了桩的截面尺寸。波速的增大和桩承载力的提高有着一致性，可以借助波速提高的时效性来研究桩的承载力的时效性，推算和确定桩的承载力。

Abstract

Low strain dynamic testing on actual pile was conducted to investigate if the wave velocity is varied in the installed pre-cast pile.It was found that the wave velocity of the pile is raised along with time.The analysis has been carried out through with one dimension and three dimension stress wave propagation theories.Among various factors influencing the rise of wave velocity

the factor of the side soil contribution is the chief one.The soil around the pile works jointly with the pile

as if to enlarge the section size of the pile.Both the increase of wave velocity and the bearing capacity of pile are consistent.So the time effect of wave velocity can be used to study the time effect of bearing capacity of the pile and to determine the bearing capacity of piles.

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