|
|
|
| Research on the Correction Method of the Spacing of Acoustic Detecting Pipes in Pile Detection |
| ZHAO Chang-yao, YANG Dong-tao |
1. Northwest Research Institute Co. Ltd of C.R.E.C, Lanzhou, Gansu 730070, China;
2. Liaoning Aolutong Technology Co. Ltd, Shenyang, Liaoning 110160, China |
|
|
|
Abstract Research purposes:Because pile is a concealed engineering, the pipe spacing between measuring points is defaults to edge distance between acoustic detection pipes of pile top surface. So acoustic detecting pipes layout should be parallel to each other. When acoustic detecting pipe layout is not parallel to each other, the spacing between measuring points is not corresponding with the edge distance of pile top surface. Under the circumstances the edge distance of the pile top surface is defaulted instead of the spacing between measuring points which influence the data analysis of pile quality judgement. So correction method must be employed to correct the pipe spacing between measuring points, to bring the pipe spacing return to the site of the real or close to the real pipe spacing, thus to further judge the quality of pile.
Research conclusions:(1) Establish the mathematical model about the spacing position relations of acoustic detecting pipe, deduce the correction method and compile the corrective procedure.(2) When the acoustic detecting pipes are parallel to each other, the revised spacing has no obvious change, which shows that this correction method will not bring external interrupt on normal section of acoustic detection pipe. (3) After abnormal section space of acoustic detecting pipes is modified, the pipe spacing and sound velocity value of measuring points can return to the corresponding real value.(4) The correction method has the very good practical value in pile engineering quality detection.
|
|
Received: 16 June 2014
|
|
|
|
|
|
[1] JGJ 106—2003,建筑基桩检测技术规范[S].
JGJ 106—2003,Technical Code for Testing of Building Foundation Piles[S].
[2] TB 10218—2008,铁路工程基桩检测技术规程[S].
TB 10218—2008,Technical Specification for Testing of Railway Piles[S].
[3] JTG/T F81—01—2004,公路工程基桩动测技术规程[S].
JTG/T F81—01—2004,Technical Specification of Dynamic Pile Tests for Highway Engineering[S].
[4] SJG 09—2007,深圳市建筑基桩检测规程[S].
SJG 09—2007,Code of Construction Foundation Pile Test of Shenzhen[S].
[5] 汪国信,李东. 遂渝铁路蓼叶湾大桥勘察认识[J]. 铁道工程学报,2009(12):20-24.
Wang Guoxin,Li Dong. Knowledge on the Survey for Liaoyewan Major Bridge of Suining-Chongqing Railway[J]. Journal of Railway Engineering Society,2009(12):20-24.
[6] 赵常要,杨东涛,员宝珊. 对声波透射法检测中存在声测管倾斜问题的一种修正方法[J]. 硅谷,2009(18):38+126.
Zhao Changyao, Yang Dongtao, Yuan Baoshan. The Correction Method about Acoustic Detection Pipes Tilt Problems[J]. Silicon Valley,2009(18):38+126.
[7] M.T.Heath. Scientific Computing[M]. 北京:清华大学出版社,2002.
M.T.Heath. Scientific Computing[M]. Beijing:Tsinghua University Press,2002. |
|
|
|
2014, Vol. 31 
