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为解决复杂采空区由于层位多、结构复杂、分布区域广,采用单一的物探方法不能满足注浆效果检测需要的问题,通过室内和现场试验得到浆液结石体的物性特征,并利用电测深法、电磁波CT和地震波CT三种物探方法,对注浆处理前后的铁路路基采空区进行了检测,结合钻探资料对注浆充填情况进行了综合评价。结果表明:注浆前后,浆液充填区与未充填空洞、围岩的物性都有较大的差异;电测深法整体检测效果较好,电磁波CT和地震波CT对细部检测较为精确;检测结果总体上和钻探结果一致,说明使用综合物探方法能够得到更准确的检测结果。
In order to solve the problem of complex gob area due to many layers, complex structure and wide distribution area, the single geophysical method can not meet the need of grouting effect detection. Physical property characteristics of grout stone body are obtained through indoor and field test. Deep method, electromagnetic wave CT and seismic wave CT three kinds of geophysical methods, before and after the grouting treatment of the railway roadbed gob area was detected, combined with the drilling data on the grouting filling a comprehensive evaluation. The results show that before and after grouting, the physical properties of the grouting zone, the unfilled hollow zone and the surrounding rock all have great differences. The electrical sounding method has a good overall detection effect, and the electromagnetic wave CT and the seismic wave CT are more precise for the detailed detection. It is consistent with the drilling results, which shows that using the comprehensive geophysical methods can get more accurate test results.