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A platform for research: civil engineering, architecture and urbanism
Lateral Extension of Slopes in Expansive Soils
Many compacted embankments are composed of expansive soils. Water from landscape irrigation, precipitation and subsurface seepage gradually infiltrates throughout the fill and causes both vertical movement and lateral expansion of the fill slope zone. Lateral stretching due to expansion often causes distress to the surface improvements and structures built near the crest of the slope. Slope inclinometers installed within the slope near the crest would register lateral movements that are due to the fill's lateral expansion. This paper describes the mechanism of lateral extension of expansive fill slopes and presents examples of resulting distress features. A procedure is described for measuring wetting-induced vertical and lateral strains on compacted and anisotropically loaded specimens using triaxial equipment with wetting control or suction control. The paper also recommends a procedure, "LFE Method", for estimating the amounts of heave/settlement and lateral fill extension as a function of the fill's geometry, soil gradation, soil swell-collapse characteristics, depth of wetting and degree of wetting. Mitigation of the effects of lateral extension of slopes is briefly discussed.
Lateral Extension of Slopes in Expansive Soils
Many compacted embankments are composed of expansive soils. Water from landscape irrigation, precipitation and subsurface seepage gradually infiltrates throughout the fill and causes both vertical movement and lateral expansion of the fill slope zone. Lateral stretching due to expansion often causes distress to the surface improvements and structures built near the crest of the slope. Slope inclinometers installed within the slope near the crest would register lateral movements that are due to the fill's lateral expansion. This paper describes the mechanism of lateral extension of expansive fill slopes and presents examples of resulting distress features. A procedure is described for measuring wetting-induced vertical and lateral strains on compacted and anisotropically loaded specimens using triaxial equipment with wetting control or suction control. The paper also recommends a procedure, "LFE Method", for estimating the amounts of heave/settlement and lateral fill extension as a function of the fill's geometry, soil gradation, soil swell-collapse characteristics, depth of wetting and degree of wetting. Mitigation of the effects of lateral extension of slopes is briefly discussed.
Lateral Extension of Slopes in Expansive Soils
Noorany, Iraj (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 642-656
2013-02-25
Conference paper
Electronic Resource
English
Lateral Extension of Slopes in Expansive Soils
| British Library Conference Proceedings | 2013
Lateral Extension of Compacted-Fill Slopes in Expansive Soils
| Online Contents | 2015
Lateral Extension of Compacted-Fill Slopes in Expansive Soils
| British Library Online Contents | 2015