WOOP als de methode voor gedragsverandering! - Zorgteamtraining
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Ametek U.S. Gauge 166364A 400 Psi Welding & Compressed Gas Gauge
Ametek U.S. Gauge 166692A 1-1/2" X 30 Psi Gauge P612a 1/8" Low Mount
Ametek U.S. Gauge 166361A Us 1-1/2x200 Gauge166361
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Ametek U.S. Gauge Us 1-1/2x30 (rl) Gauge166691a
Ametek U.S. Gauge Us 2-1/2x400 Gauge164289a P-612k
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Ametek U.S. Gauge Us 2-1/2x100 Gauge164285a P-612k
$15.39 - $15.39 (6) Volume 29, Issue 11, 1987
Civil Engineer in South Africa - Volume 29, Issue 11, November 1987
Volume 29, Issue 11, November 1987
Evaluation of strength of precast reinforced concrete portal culverts : technical paper
Authors: Gerhard Maritz and Jacobus Conradie
Source: Civil Engineer in South Africa 29, pp 437 –442 (1987)
Stabilization with rock anchors of two cuttings on National Route N13 : technical paper
Authors: I.J.A. Brackley, D. Williams and P.J. Terbrugge
Source: Civil Engineer in South Africa 29, pp 443 –450 (1987)
During the construction of a section of National Route N13 (Johannesburg Southern Bypass) two large cuttings were excavated. The first, in andesite lava, was adjacent to a Rand Water Board pipeline and the second, in quartzites, adjoined private dwellings. The cuttings were restrained with stressed anchors and unstressed dowels and the exposed faces were protected by concrete panels. The geotechnical design of the lateral support in the andesite was problematic, owing to the unpredictable variations in rock weathering. By contrast, the quartzite cutting was uniformly weathered, with consistent patterns of jointing, and design problems were concerned mainly with the overlying transported soil.
Die konstruksie van &apos;n gedeelte van Nasionale Roete N13 (Johannesburgse Suidelike Verbypad) het twee groot deurgrawings ingesluit. Die eerste, in andesietlawa, is aangrensend aan &apos;n Randwaterraad-pyplyn and die tweede, in kwartsiet, grens aan privaatwonings. Die deurgrawings is verstewig met gespande ankers en ongespande penne en die blootgestelde oppervlakte is beskerm met betonpanele. Die geotegniese ontwerp van die laterale ondersteuning in die andesiet was problematies, te wyte aan die onvoorspelbare verandering in rotsverwering. In teenstelling hiermee was die kwartsietdeurgrawing gelykmatig verweer, met egalige naatpatrone, en ontwerpprobleme het grotendeels gekonsentreer op die oorliggende getransporteerde grond.