摘要
研究目的:由于基桩属于隐蔽性工程,采用声波透射法检测时,基桩各个测点的管间距均默认为桩顶面声测管之间的边缘距离,因此要求布设的声测管相互平行,但当声测管不平行时,基桩各个测点的管间距和桩顶面的边缘距离不对应,就不能默认为桩顶面声测管的边缘距离,这种情况下继续将基桩各个测点的管间距默认为桩顶面的边缘距离会给检测数据分析带来严重影响,因此必须采用修正手段对基桩的各个测点管间距进行修正,使各个测点的管间距回归至真实或接近真实值,进而才能对基桩质量做进一步的判定。研究结论:(1)建立了声测管管间距的空间位置关系的数学模型,并推导了修正方法,编制了修正程序;(2)声测管平行时测点管间距经本修正方法修正后,管间距变化非常小,说明本修正方法对声测管正常段不会带来外来干扰;(3)采用本修正方法对声测管管间距异常段修正后,测点的管间距和声速值能回归至真实值;(4)本修正方法在基桩工程质量检测中具有实用价值。
Research purposes： Because pile is a concealed engineering, the pipe spacing between measunng 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 eorreetion 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.
出处
《铁道工程学报》
EI
北大核心
2014年第11期25-29,64,共6页
Journal of Railway Engineering Society
关键词
基桩
检测
声波透射法
修正方法
pile
detection
acoustic transmission method
correction method
