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- W948894022 abstract "CONSTRUCTION WORKS FREQUENTLY INDUCE LANDSLIDES; FOR EXAMPLE, BY CHANGING EXISTING GROUND SLOPE AS A RESULT OF THE EXCAVATION OF TUNNELS AND DAM FOUNDATIONS. IF THE PROPOSED TUNNEL OR DAM IS TO BE LOCATED UPON OR ACROSS A POTENTIAL LANDSLIDE AREA, CONSIDERATION MUST BE GIVEN TO WHETHER THE AREA WILL REMAIN STABLE UNDER THE CONDITIONS IMPOSED. IN EXCAVATING A CERTAIN TUNNEL IN A POTENTIAL LANDSLIDE AREA, DEFORMATION OF THE SUPPORRS FOR THE SIDEWALL HEADINGS WAS EXPERIENCED. THIS AFFECTED THE GROUND SURFACE, AND THERE AROSE THE DANGER OF A LANDSLIDE WHOSE PREVENTION WAS THE SOURCE OF THIS INVESTIGATION. FIRST OF ALL, AERIAL PHOTO ANALYSIS AND FIELD SURVEYS WERE CARRIED OUT TO STUDY THE GEOMORPHOLOGICAL AND GEOLOGICAL CHARACTERS OF THIS LOCATION. SEISMIC PROSPECTING ALONG TWO LINES PRODUCED DATA ON THE DEPTH TO BEDROCK. THE SLIDING MOVEMENT AND TILTING MOTION ON THE GROUND SURFACE WERE MEASURED BY WIRE EXTENSOMETERS AND TILTMETERS. SUBSURFACE DEFORMATION WAS MEASURED BY AN INTERNAL-STRAIN METER. MICROSEISM COUNTERS WERE INSERTED INTO BOREHOLES TO COUNT THE FREQUENCY OF ROCK CRUSHING SOUND CAUSED BY LANDSLIDES. ON THE BASIS OF ANALYSIS OF THE DATA, THE UPPER HEADING WAS EXCAVATED AND A CONCRETE LINING WAS IMMEDIATELY CONSTRUCTED. ROCK BEHAVIOR DURING THE PROCESS OF EXCAVATION AND LINING WAS MEASURED. /AUTHOR/" @default.
- W948894022 created "2016-06-24" @default.
- W948894022 creator A5061535160 @default.
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- W948894022 date "1969-01-01" @default.
- W948894022 modified "2023-09-26" @default.
- W948894022 title "INVESTIGATION AND PREVENTION OF LANDSLIDES CAUSED BY CONSTRUCTION WORKS, SUCH AS TUNNELS, DAMS OR OTHER STRUCTURES /IN JAPANESE/" @default.
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