DEPTH PROFILING AND SOLVING OF GEOTECHNICAL ENGINEERING PROBLEMS BY MEANS OF ONE-CHANNEL REFLECTION SEISMIC

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 1, 421-426 pp

ABSTRACT

The subject of this paper is to present an efficient method for exploration of surface
beds by means of one-channel reflection seismic. Two-step algorithm based on
simplified seismic diffraction theory is used for processing of the field data. During the
first step the registered wave field is re-calculated with specialized software taking into
consideration definite assumptions for the environmental model. During the second step
the so re-calculated wave field is transformed using Phase Shift Migration method. As
result of step 1 and 2 the deep section, linked to the relief, is obtained, on which events,
fault and normal slips can be identified. The depth of the basement can also be
identified. Sliding surfaces, if present, will also be determined. Examples for solving
structural geo-mechanical problems on some landslides along Bulgarian Black Sea coast
are shown in the attached graphics. Events up to 50 meters depth were identified. The
possibilities for fast and efficient field measurements, including processing and
interpretation of the data, make the method very suitable for site surveys for nuclear
power stations (NPS) construction sites, purifying stations, waste deposits as well as for
linear objects such as oil and gas pipelines.

Keywords: one-channel reflection seismic, depth profiling, geotechnics, geomechanics, engineering problems, landslides