APPLICATION OF LANDSONAR METHOD IN SHALLOW HIGH RESOLUTION SURVEY
Zhong Shihang · Chinese Journal of Engineering Geophysics · 2004
Landsonar, the abbreviation of an extremely elastic reflection wave of continues profiling with extremely small offset and very wide band frequency, has some advantages. It has been successfully used in high resolution exploration of shallow stratums, obtaining near surface parameters for seismic statics, surveying depth and smaller karst caves, geological prediction of the front of drift in the tunnel construction, checking the quality of retaining walls, checking on the quality of lining of thick concrete structure and empty areas in their back and so on. This method with some special characteristics, such as the receiving system with very wide band frequency, the band pass filtering (100—200Hz or 100—500Hz) getting for different time windows in data, has got good results and has proved to work normally on the downtown street.