|Table of Contents|

Method of Detecting Integrality of Defective Piles in Terms of Characteristic of Mechanical Admittance Spectrum and Its Engineering Application(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2006年第04期
Page:
73-77
Research Field:
Publishing date:

Info

Title:
Method of Detecting Integrality of Defective Piles in Terms of Characteristic of Mechanical Admittance Spectrum and Its Engineering Application
Author(s):
SHAO Guang-zhou; MENG Zhao-qin; LIU Guo-hua
School of Geological Engineering and Surveying Engineering, Chang’ an University, Xi’an 710054, Shaanxi, China
Keywords:
pile;  admittance spectrum;  vibration;  modal analysis;  lumped mass
PACS:
TV32+3;P631.5
DOI:
-
Abstract:
The modal analysis technique in vibration engineering is used to study the vibration characteristic of the pile system. The pile systems are simplified as different vibration systems with different degree of freedom. The mechanical admittance spectrums of the intact pile and all kinds of defective piles are computed largely according to the lumped mass model of the pile system. It is found that the characteristic of mechanical admittance spectrum have some coincidence relations with the style and position of the defective piles. Therefore, the quality of the pile foundation can be detected in terms of this characteristic. This principle is applied to actual engineering, and the actual data is processed with proper data processing and spectrum analysis methods, the corresponding processing software is also developed along with them. The result of actual measurement proves that the method is viable to a certain degree if the model is selected expediently, and the interpretation software has some useful value too.

References:

[1] 邱 畅，高广运. 桩基动测技术存在的问题 和发展趋势[J] . 住 宅科技，2002(2):25 34.
[2] 吴 琳，李天文. 基于 GIS 的沉降 监测数据分析 及其三维模 拟[J] . 地球科学与环境学报，2004，26(2):67 70.
[3] Frit zen C P，Bohl e K. Appli cation of Model Bas ed Dam age Iden tif icati on to a Seismical ly Loaded St ructu res [J] . Sm art Mat erials and S t ru ctures，2001，10(3):452 458.
[4] 何 剑，方仁宝，张晓伟，等. 田湾核电站某工程偏 移基桩性状 分析[J] . 地球科学与环境学报，2004，26(2):63 66.
[5] 王德兴，玉 岩，杨志华. 桩基质量 无损检测 中谱分析 方法的 讨论[J] . 黑龙江交通科技，2001，91(3):42 45.
[6] 孟昭秦. 锤击桩基动测的导纳谱研究[J] . 西安地 质学院学报， 1997，19(1):98 105.
[7] 孟昭秦，李 貅，何 林. 结构振动 数据数学 模型的线 性与非 线性刻划[J] . 西安工程学院学报，1999，21(2):34 38.
[8] 孟昭秦，何 林，刘士军. 结构损伤 线性与非 线性特征 谱模式 识别与应用[J] . 西安工程学院学报，1999 ,21(3):36 4.

Memo

Memo:
-
Last Update: 2006-12-20