电磁波CT在赤水河大桥主承台岩溶探测中的应用

电磁波CT技术在碳酸盐岩岩溶探测方面广泛应用,但经常受工区地质条件、现场施工工况的影响,造成难以解释的异常假象。通过工区正演模型讨论、建立正演模型等手段,将正演模型运用于赤水河大桥主承台下岩体的处理解释中,解决了“桩基异常体”对测量结果的影响,并结合施工现场特点将探测结果划分出“表层效应”异常区、“井壁响应”异常区、“桩基与围岩综合响应”异常区、完整围岩区,取得了较好的应用效果。

Application of Electromagnetic Wave CT in Karst Detection for Main Bearing Platform of Chishui River Bridge

Electromagnetic wave CT is widely used in the detection of carbonate karst cave,but it is often affected by the geological conditions of the work area and the site construction conditions,causing anomalous artifacts that are difficult to explain.The forward model is applied to the processing and interpretation of the rock mass under the main bearing platform of Chishui River Bridge through the discussion and the establishment of the forward model.The effect of the pile foundation abnormal body on the measurement results is solved.Combining with the characteristics of construction site,the detection results are divided into surface effect anomaly area,well wall response anomaly area,pile foundation and surrounding rock comprehensive response anomaly area,complete surrounding rock area,and good application effect has been obtained.