Soil slope stability investigation and analysis in Iowa

Yang, Hong

doi:10.31274/rtd-180813-11796

Cited by 3 publications

(4 citation statements)

References 40 publications

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“…A positive correlation between and bulk density has been reported in the literature as higher bulk density in most cases indicates higher effective stress (e.g., Ayers, 1987;Bardet et al, 2011). The values recorded herein are in a general agreement with the values reported by Lohnes and Handy (1968), Lohnes et al (2001), Yang et al (2005), and…”

Section: Mechanical Strengthsupporting

confidence: 93%

“…Veeraraghavan (2007) for sites exhibiting relatively similar properties. For example, Lohnes et al (2001) reported values ranging between 6.91 ± 4.19 kPa and 7.65 ± 5.59 kPa, respectively, for loess with high plasticity and glacial till deposits found in Iowa (Prior,1976;Lohnes et al, 2001;Yang et al, 2005;Oneal, 2009). Yang et al (2005) reported values in the range of 2.7 to 12 kPa for glacial till soils with a texture of silt clay loam extracted across six (6) counties in southern Iowa.…”

Section: Mechanical Strengthmentioning

confidence: 99%

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Bank erosion processes in streams in the U.S. Midwest

Sutarto¹

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Section: Mechanical Strengthsupporting

confidence: 93%

Section: Mechanical Strengthmentioning

confidence: 99%

Bank erosion processes in streams in the U.S. Midwest

Sutarto¹

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“…Furthermore, soil properties such as cohesion, friction angle, particle size, density, and water contents are very important in any simulation and analysis involving soil [20,21]. Results from previous studies have shown that changing of soil friction angles and cohesion could affect the bearing capacity of soil [22,23]. The results from Khezri et al showed that cohesion is very important to be measured in underground structures because cohesion increases with depth and each layer of soil has different cohesion [24].…”

Section: Introductionmentioning

confidence: 99%

A Novel Experimental Study on the Effects of Soil and Faults’ Properties on Tunnels Induced by Normal and Reverse Faults

et al. 2020

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Due to the world population increasing considerably, there is a need for efficient public transportation, such as the subway. However, it has become a major concern to geotechnical engineers that the development and construction of subways are held underground where faults exist, as it will be a major risk to any structure if the fault is still active. Several seismic events, such as the earthquakes in Taiwan in 1999, China in 2008, and Malaysia (Sabah) in 2015, caused by fault ruptures, signify the importance of this study. In this paper, a physical model of 1000 mm in height, 3000 mm in length, and 1000 mm in width, which is the largest single gravity (1g) model for simulation faults (normal and reverse) ever built, was fabricated to evaluate the influence of various soil properties, various fault angles, and tunnel depths on tunnels affected by normal and reverse faults. The effects of various soil properties, such as water content, particle size, cohesion, and friction angle, had revealed major changes (approximately by 34%, 39%, 64%, and 39%, respectively) in tunnel displacements. Results also showed that increasing of fault angle could increase the tunnel displacement as much as two times. In addition, when a tunnel is located close to the ground surface, 22% less displacement was found to have occurred to the tunnel. With the results obtained from the physical model, simulation had been made using plane strain and axial symmetry (PLAXIS) software. The comparison made between rock and soft soil showed that soft soil imposed two times more displacements than rock, and an existence of foundation in soft soil and rock can decrease the tunnel displacements by 6% and 4%, respectively. This paper asserts that besides the structural design of a tunnel, the geotechnical design also has a major impact on the safety and robustness of the tunnel, in which aspects such as soil properties, tunnel depth, and fault angle have a strong influence on tunnel damages which were not considered in previous research, despite their importance.

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“…The anti-share function of the soil-nailing has been mostly ignored. However, as shown in many on-field experiments, the impact of soil-nailing shear on the anti-slipping effect can be significant and should not be ignored from the design consideration [2].…”

Section: Introductionmentioning

confidence: 99%

Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture

Yang

Liu

2011

AMR

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This paper introduces a new failure mode pattern of soil slope – the logarithmic spiral slippery fracture. A mathematical model for the logarithmic spiral slippery fracture is established, taking the anti-shear function of the soil-nailing into consideration. The shear of soil-nailing, axial force, and the safety coefficients based on the limiting equilibrium method are derived, leading to an accurate stability analysis of the strengthening of soil slope. A case study shows that the anti-shear function of the soil-nailing can be significant and should not be ignored in engineering design.

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Soil slope stability investigation and analysis in Iowa

Abstract: In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.

Cited by 3 publications

References 40 publications

Bank erosion processes in streams in the U.S. Midwest

Bank erosion processes in streams in the U.S. Midwest

A Novel Experimental Study on the Effects of Soil and Faults’ Properties on Tunnels Induced by Normal and Reverse Faults

Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture

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