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analysis and interpretation on the concrete quality of shaft lining by elastic wave technique

Journal of Coal Science & Engineering(China) 2012年第1期18卷 14-17页

作者： Zhang, Ping-song Li, Yong-sheng Xie, Xiong-yao College of Civil Engineering Tongji University Shanghai China School of Earth and Environment Anhui University of Science and Technology Huainan China

The quality problem of the concrete body and backwall grouting of shaft lining must be taken into consideration during the engineering construction of the shaft. Detection and evaluation are needed to determine the parameters such as the location and depth of drilling. The record of elastic wave can be gained through laying the surveying lines of the ring and ver- tical direction in the shaft lining by the elastic wave method. And specifically, through analyzing the different parameters of seismic attribute such as the velocity of high frequency reflection wave, amplitude and frequency, the abnormal range on the wall or under the wall can be forecasted. The concrete quality of shallow layer in the shaft lining can be evaluated through the velocity of surfer wave. Using the evaluating technique of comprehensive frequency and the phase feature of waveform, the basic features such as inner construction, wall back filling and failure depth of shaft lining can be interpreted from qualitatively to half quantitatively, and the interpreting section can be drawn. The results show that the detection effect for the shaft quality is significant by elastic wave technique, and the delineation of abnormal areas is accurate. Its guidance function is better for pro- duction.

关键词： concrete quality of shaft lining elastic wave technique analysis and interpretation method backwall grouting

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