A type of continuous cast "in-situ" slurry trench wall is described, in which prestressing is carried out prior to excavation, with the object of reducing bending and deformations caused by earth pressure. For this purpose, the wall carries a conventional light-weight reinforcement and A series of highly elastic steel cables. A test was carried out on a full-scale panel measuring 5.0 x 0.6 x 15.0 metre, excavation was by means of a bi-valve spoon and bentonite slurry. The cables had, at half or their maximum depth, an eccentricity not greater than 20 cm. In the head part, A beam was concreted in order to apply the stresses to the cables. The wall was instrumened in order to measure stresses and deformations of the concrete, in five sections at different depths. The results of the test are briefly described. These results made clear the important action of the terrain on the cast-in-situ wall (reduction of deformations, of loads transmitted to the concrete, elasticity of the structures, etc). These these results show the influence of prestressing in preventing deformations. /TRRL/

  • Authors:
    • Nicolo, J
  • Publication Date: 1972-6-7

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Filing Info

  • Accession Number: 00096186
  • Record Type: Publication
  • Source Agency: Transportation & Soil Mechanics Laboratory, Spain
  • Files: ITRD, TRIS
  • Created Date: Sep 10 1975 12:00AM