Effects of Saturation on Shear Strength of Soils

Yoshida, Yoshitada; Kuwano, J.; Kuwano, Reiko

doi:10.3208/sandf1972.31.181

Cited by 20 publications

(9 citation statements)

References 3 publications

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“…In particular, the SLIP Model considers the reduction of cohesion with respect to the soil saturation. In addition, the results of Yoshida et al [68] considered the effect of saturation on shear strength.…”

Section: Moisture Effectmentioning

confidence: 99%

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

2023

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Several Italian cities are characterized by the presence of centuries-old historic walls, which have a cultural heritage value and, due to their structural role as a retaining wall, often influence the safety of adjacent buildings and infrastructure. Ancient urban walls are increasingly subject to instability and collapse phenomena, because the greater frequency of extreme meteoric events aggravates the static condition of the walls and of the wall–soil system. Since the seismic risk in the contexts in which the historical urban walls are located is often medium-high, it is advisable to evaluate the influence of soil moisture on the seismic response of the soil–structure system. In this paper, the seismic vulnerability of historical urban walls was examined through considering scenarios of both dry and wet soil, in order to evaluate the seismic response of the structure as a function of soil imbibition. Seismic vulnerability analyses were carried out on the case study of the historical urban masonry walls of Volterra (Italy), which have been affected by two major collapses in the last ten years. Seismic vulnerability was assessed by means of the limit equilibrium method and the finite element method, and through adopting proper soil imbibition models. The results highlight which sections of the walls are at greater seismic risk due to the presence of soil moisture, as well as the influence of soil imbibition on the structural safety and failure mechanism.

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Section: Moisture Effectmentioning

confidence: 99%

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

2023

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“…The effect of high rainfall causes the soil to become saturated, and water is trapped inside the soil voids. This condition increases the degree of saturation and decreases soil shear strength drastically [1]. In addition, the collapsed trees on the surface of the slope caused excessive loads and ruined the combi-grid as a slope reinforcement system.…”

Section: Introductionmentioning

confidence: 99%

Implementation of building information modeling on slope stability and mitigation analysis in Aceh, Indonesia

Purnama¹,

Oktaviana²,

Kurniawan³

et al. 2022

J Appl Eng Science

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Slope failure in the well site area in Aceh, Indonesia caused the termination of gas distribution and resulted in financial loss. Based on the visual observation, the slope failed due to the high intensity of rainfall, which influenced the reduction of soil shear strength of the slope embankment. Moreover, the slope reinforcement has been damaged due to the collapsed trees on the slope embankment. Slope stability analysis was carried out by using a two-dimensional (2D) numerical method in several section areas to determine the appropriate slope reinforcement or countermeasures. Based on the 2D slope stability analysis, the Building Information Modeling (BIM) was performed by using a 3D projection drawing to evaluate the detailed information of the area which was applied by the countermeasures system. This method describes the total area and material quantity covered by the countermeasure system to determine the information material quantity and land acquisition area. Furthermore, the implementation of BIM in this study provides detailed information during the construction process to ensure comprehensive landslide mitigation.

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“…Subsequent studies showed that the pore water pressure within a ground mass tends to elevate with the duration of precipitation, and is a common trigger for initiating landslides (Farooq et al, 2004;Orense et al, 2004). The relationship between shear strength, dry density and degree of saturation of soil mixtures has also been studied widely (Uno and Miyasha, 1981;Kutara & Ishizuka, 1982;Yoshida et al, 1991). These investigations revealed that as the degree of saturation increases at a particular dry density, the shear strength of the soil consistently decreases.…”

Section: Introductionmentioning

confidence: 99%

Effect of Densification on the Shear Strength of Landslide Material: A Case Study from Salt Range, Pakistan

Farooq¹,

Rogers²,

Ahmed³

2015

ESR

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This research was aimed to investigate the effect of densification on the shear strength of the Simbal Landslide, which was triggered by intense rainfall in October, 2005 along the M2 Lahore Islamabad Motorway in Pakistan. Subsurface ssamples were extracted from the zone close to the basal rupture surface to allow assessment of the mobilized shear strength. Basic field and laboratory tests were conducted on remolded samples to ascertain the fundamental engineering properties of the landslide material. These included unconfined compression tests triaxial tests, and direct shear tests performed on samples of varying density and moisture content. Comparisons were made between degree of saturation and cohesion and internal friction which revealed that at low water contents the shear strength initially increases then decreases for all dry densities. This initial increase may be due to the development of apparent cohesion in the clay particles present in soil-rock mixture. The overall results suggest that the that the shear strength parameters increase with increasing dry density, and that noticeable loss of strength occurs as the soil mixture approaches saturation, independent of density.

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Effects of Saturation on Shear Strength of Soils

Cited by 20 publications

References 3 publications

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

Seismic Analysis of Historical Urban Walls: Application to the Volterra Case Study

Implementation of building information modeling on slope stability and mitigation analysis in Aceh, Indonesia

Effect of Densification on the Shear Strength of Landslide Material: A Case Study from Salt Range, Pakistan

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