Read e-book online Experimental and applied modeling of unsaturated soils : PDF

By Laureano R Hoyos; Xiong Zhang; Anand J Puppala; American Society of Civil Engineers.; American Society of Civil Engineers. Geo-Institute

ISBN-10: 0784473420

ISBN-13: 9780784473429

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Read Online or Download Experimental and applied modeling of unsaturated soils : proceedings of sessions of GeoShanghai 2010, June 3-5, 2010, Shanghai, China PDF

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Additional info for Experimental and applied modeling of unsaturated soils : proceedings of sessions of GeoShanghai 2010, June 3-5, 2010, Shanghai, China

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Core cell Figure 5. Panoramic view of entire suction-controlled true triaxial test layout GEOTECHNICAL SPECIAL PUBLICATION NO. 202 45 Figure 6. Static compaction process and typical statically-compacted specimen Samples were prepared using a custom-made stainless steel mold, as shown in Figure 6. 5 g of SP-SC soil mixed with water to the target 10% moisture. 0 mm/min. Immediately after compaction, the specimen is gently extruded from the mold and transferred to the cubical cell. A photograph of a typical statically-compacted sample is also shown in Figure 6.

The results show that vertical strains for the soils with fines generally exceed those for clean sands. This is consistent with the results of Whang et al. (2005) for non-plastic fines. 52 GEOTECHNICAL SPECIAL PUBLICATION NO. 202 Effect of Saturation Figures 1-3 show that specimens of the Orange and Wilshire soils at high saturations (S ≥ 60%) generally experience vertical strains similar to specimens at S = 0%. However, for specimens at intermediate saturations (S ~ 30%), the vertical strains decrease relative to specimens at S = 0%.

To understand the role of saturation on seismic compression, matric suction tests were performed on partially saturated soil mixtures using the filter paper method (ASTM D5298-03). Typical matric suction test results are shown in Figure 4 for the Newhall#2 material. These figures show matric suction is higher at S = 30% than at S = 60% and also increases with FC. Since matric suction increases inter-particle stresses, the constrained modulus increases with matric suction, which in turn decreases the volume change potential of the soil.

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Experimental and applied modeling of unsaturated soils : proceedings of sessions of GeoShanghai 2010, June 3-5, 2010, Shanghai, China by Laureano R Hoyos; Xiong Zhang; Anand J Puppala; American Society of Civil Engineers.; American Society of Civil Engineers. Geo-Institute


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