GEOTECHNICAL PROBLEMS WITH SOFT BANGKOK CLAY ON THE NAKHON SAWAN HIGHWAY PROJECT

FROM THE START AT KM. 51,8 UP TO APPROXIMATELY KM. 72 NEAR AYUTHAYA THE NAKHON SAWAN HIGHWAY WILL BE BUILT ON SOFT BANGKOK CLAY. IN THIS AREA THERE IS A CONTINUOUS LAYER OF SOFT CLAY HAVING A THICKNESS OF 4-5 METERS, AND IN PLACES IT EXTENDS DOWN TO 16-18 METERS. THESE DEEP GULLIES IN THE UNDERLYING STIFF CLAY ARE OLD RIVERBEDS, AND THE ROAD LINE CROSSES THEM AT SEVEN PLACES. BESIDES THE SOIL INVESTIGATIONS CARRIED OUT ALONG THE ROAD LINE, SPECIAL ATTENTION HAS BEEN PAID TO THE OLD RAILWAY EMBANKMENT WHICH RUNS ALMOST PARALLEL TO THE ROAD AT A DISTANCE OF 1-3 KM. TO THE WEST. THIS EMBANKMENT, 60 YEARS OLD, IS OF APPROXIMATELY THE SAME HEIGHT AS THE PLANNED HIGHWAY. CONSIDERABLE DIFFICULTIES HAVE ALREADY BEEN ENCOUNTERED IN MAINTAINING THIS STRETCH, AND SOIL INVESTIGATIONS HAVE BEEN CARRIED OUT ON VARIOUS TROUBLE SPOTS IN ORDER TO ANALYSE BOTH THE STABILITY AND THE SETTLEMENT CONDITIONS. IT SHOULD ALSO BE MENTIONED THAT EXPERIENCE FROM TWO TEST SECTIONS ON THE BANGKOK-SIRACHA HIGHWAY, WHICH HAVE NOW BEEN UNDER OBSERVATION FOR MORE THAN ONE YEAR, HAS BEEN UTILIZED IN ANALYSING THE PROBLEMS FOR THE NAKHON SAWAN HIGHWAY. IN MANY RESPECTS THE BANGKOK CLAY CANNOT BE DEALT WITH USING CONVENTIONAL TEXTBOOK METHODS. UNTIL ADDITIONAL RESEARCH WORK HAS FURTHER REVEALED ITS GEOTECHNICAL PROPERTIES THE GREATEST SIGNIFICANCE HAS TO BE ATTACHED TO THE FIELD OBSERVATIONS. /RRL/

  • Supplemental Notes:
    • No 78, 9 Pp, 11 FIG, 1 PHOT, 5 REF
  • Authors:
    • EIDE, O
  • Publication Date: 1968

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  • Accession Number: 00234772
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jun 22 1970 12:00AM