THE USE OF PORTABLE SEISMIC REFRACTION EQUIPMENT FOR FOUNDATION STUDIES

PORTABLE SEISMIC REFRACTION EQUIPMENT CAN BE USED EFFICIENTLY FOR SHALLOW (LESS THAN 100 FEET) SUBSURFACE EXPLORATION. IN FOUNDATION STUDIES UNDER SITES OF LARGE STRUCTURES SEISMIC METHODS CAN REDUCE THE NUMBER OF BORINGS REQUIRED. THE PORTABLE EQUIPMENT CAN EASILY BE OPERATED BY TWO MEN AND FOR MOST INVESTIGATIONS DOES NOT REQUIRE USE OF EXPLOSIVES. STEPS IN THE OPERATION ARE OUTLINED AND ILLUSTRATED BY DIAGRAMS. THE MEASURING TAPE IS PLACED ALONG THE DESIGNATED COURSE WITH THE GEOPHONE AT ONE END. SHOCK WAVES ARE INITIATED ALONG THE COURSE AND TIME READINGS FOR TRAVEL OF THE WAVES TO THE GEOPHONE ARE TAKEN. THE DATA ARE PLOTTED ON A TIME-DISTANCE GRAPH. OUTSIDE NOISE INTERFERENCE CAN BE DISTINGUISHED FROM THE CONTROLLED SHOCK WAVE BY USE OF THE VISUAL DISPLAY SYSTEM. NOT ONLY CAN THE MATERIAL BELOW GROUND SURFACE BE GENERALLY CLASSIFIED, BUT A DEPTH COMPUTATION CAN BE MADE ON EACH SUCCESSIVE STRATUM. /GA/

• Authors:
  • Thompson, S V
• Conference:
  • Engineering Geology and Soils Engineering Symposium, Proceedings of the 6th Annual
  • Location: Boise ID, United States
  • Date: 1968-4-17 to 1968-4-19
• Publication Date: 1964

Subject/Index Terms

• TRT Terms: Foundations; Geological surveying; Geophones; Graphics; Measuring instruments; Portable equipment; Refraction; Seismicity; Shock waves; Soil types
• Uncontrolled Terms: Graphical analysis; Seismic investigations; Seismic refraction; Soil classification
• Old TRIS Terms: Foundation investigations; Subsurface explorations
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00229559
• Record Type: Publication
• Source Agency: Geophysical Abstracts
• Report/Paper Numbers: pp 104-106
• Files: TRIS
• Created Date: Aug 15 2004 1:50AM