In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade

BAI Hao; SU Qian; HUANG Jun-jie; ZHENG Jian-bin; WANG Xun

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In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade

更新时间：2026-06-25

- In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade
- Vol. 33, Issue 12, (2012)
- 作者机构：
- 作者简介：
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- DOI：
  CLC： U213.1
- Online First：15 December 2012，
  
  Published：2012
- 稿件说明：
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BAI Hao, SU Qian, HUANG Jun-jie, et al. In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade[J]. 2012, 33(12).
DOI：

BAI Hao, SU Qian, HUANG Jun-jie, et al. In-situ forced vibration tests on dynamic characteristics of non-embedded pile-board subgrade[J]. 2012, 33(12). DOI：

摘要

非埋式桩板结构嵌入路基形成刚性路基结构体系，导致路基结构动态性能发生较大的变化，因此，有必要对其进行专门的原位激振试验研究。利用DTS-1动力试验系统，对郑西客运专线桩板路基试验段进行原位激振试验，测定路基各断面的振动响应、结构内力和累积沉降等，分析非埋式桩板路基的振动特性和动力稳定性。结果表明，非埋式桩板路基在激振频率范围内未发生共振现象，且具有良好的长期稳定性；桩板结构累积沉降主要是由承载板变形引起的，加载75×104次后基本上趋于稳定，加载100×104次后最大累积沉降为1.0 mm；非埋式桩板路基综合动刚度与板厚、跨度、桩基和桩周土等有关，由桩板结构、路堤和地基构成的刚性路基结构体系具有良好的振动特性和长期动力稳定性。

Abstract

In-situ vibration test of non-embedded pile-board subgrade needs to be carried out because this structure’s dynamic characteristics are quite different from normal subgrade. DTS-1 dynamic test system is used to test the vibration response

internal force and settlement of a subgrade section in Zhengzhou-Xi’an Passenger Dedicated Line. Result shows that sympathetic vibration will not happen in range of exciting frequency

and subgrade settlement mainly happens on loading plate and will be basically stable after 0.7 million times’ loading with a final settlement of 1.0mm after 1 million times’ loading. Comprehensive dynamic stiffness is related to thickness of board

span

piles and soil

which can provide well vibration characteristics and long-term dynamic stability for the combining structure of pile-board structure

subgrade and foundation.

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