【摘要】 防空洞探测属于地下洞体探测中的一种特殊工程地质问题。选用小线框瞬变电磁法应用于地下空洞的探测,对于施工区地表有较强的适应能力,工作效率较高。其数据处理解释采用全期定义将实测瞬变衰减曲线转换为视电阻率深度曲线,根据地下空洞的瞬变电磁响应特征分析等视电阻率曲线的形态来确定空洞体存在,证明了在城区建筑基坑中采用小线框瞬变电磁法在探测地下空洞中的有效性。更多还原

【Abstract】 The transient electromagnetic method with small loop has a stronger adaptability and higher effectiveness to the construction plant in cities.Using the suitable apparatus,the transient electromagnetic method could be used to prospect the underground shelter.Its data processing and interpretation use the full time definition,transferring the measured transient attenuation curve to the apparent resistivity depth curve,the existence of underground cave is determined based on the shape of apparent resistivity curve analyzed by the characteristics of transient electromagnetic response of underground cave.The better geologic effectiveness had been obtained by this method through the practical application in many times.It proved that the transient electromagnetic method with small loop is available in prospect of underground shelter in cities.更多还原