Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/13518
標題: 以敲擊回音法檢測鋼腱套管之灌漿品質
Detection of Ungrouted Ducts Using the Impact-Echo Method
作者: 許有智
Hsu, Yeou-Chih
關鍵字: impact-echo;敲擊回音法;post-tensioning ducts;nondestructive test;grouting quality;預力套管;非破壞檢測;灌漿品質
出版社: 土木工程學系
摘要: 
在橋樑工程上,常採用預力混凝土箱型節塊或I形樑以增加橋樑跨度,其
中又以後拉法施工最為普遍。本論文之目的,即以敲擊回音法對在施加預
力後,鋼腱套管中填灌水泥漿之施工品質良窳,進行非破壞檢測上之應用
研究。首先,利用數值分析方法,對不同尺寸之套管及其位置之變化,所
產生因敲擊而引起之波動行為的差異,並評估敲擊回音法在套管灌漿品質
檢測上之應用性。根據數值分析之結果,規劃實驗室試體,試體將包含灌
漿完整及不完整之套管,實際進行敲擊試驗,以驗證數值分析結果。數值
及試驗結果顯示,若套管內部是灌漿良好的情況時,其應力波可以穿透填
灌漿,而無反射應力波的訊號出現;但是若套管內部因灌漿不良而形成瑕
疵介面時,不管其瑕疵是完全中空或是部份中空,都會將應力波反射到版
表面,而使敲擊反應頻譜上出現因瑕疪存在所產生之相對應的高振幅尖峰
,用以確定套管內部是否含有瑕疵。

Prestressed box girders and I-shaped beams are commonly used in
bridge construction. The objective of this research is to
determine whether the impact-echo method is capable of detecting
voids in grouted post-tensioning tendon ducts. Numerical studies
were performed first to understand how the stress waves produced
by point impact interact with completely or partially grouted
ducts. The feasibility of using the impact-echo method for
detection of voids in ducts can be evaluated. Laboratory studies
were carried out to verify the numerical results. Results
obtained from these studies show that there exists a big
difference between the spectra obtained from impact-echo tests
on completely grouted ducts and those for partially grouted
ducts. The location of the ducts containing voids can be
determined by identifying the corresponding high amplitude peak
in the spectrum.
URI: http://hdl.handle.net/11455/13518
Appears in Collections:土木工程學系所

Show full item record
 
TAIR Related Article

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.