The effect of pressure-grouted soil nails on the stability of weathered soil slopes

Kim, Yongmin; Lee, Sungjune; Jeong, Sangseom; Kim, Jae Hong

doi:10.1016/j.compgeo.2012.12.003

Cited by 44 publications

(16 citation statements)

References 24 publications

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“…The induced horizontal and vertical displacements at three different locations, such as slope crest, slope midpoint, and slope toe that corresponded to the position of a critical slip surface inferred from slope stability analyses were investigated. Based on the slope deformations, a dimensionless displacement ( E s δ max /γ t H 2 ) given by Kim et al [27] and Zienkiewicz et al [58] was calculated to define instability of the slope, where E s is the Young's modulus of the soil, δ max is the maximum displacement of the slope along the critical slip surface, γ t is the unit weight, and H is the slope height. To find the time at failure, two tangent lines were drawn on the relationship between the dimensionless displacement versus elapsed time.…”

Section: Seepage Deformation and Stability Analysesmentioning

confidence: 99%

Role of unsaturated soil mechanics in geotechnical engineering

2019

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Significant changes in climatic conditions in past decades are affected mostly by the increase in global temperature. Many countries experienced longer days of rainfall with higher intensities. Despite numerous debates about the existence of global warming, over 97% of climatologists reached an agreement that the changes in global climatic conditions are affected mainly by human activities [9]. A study on one aspect of climate change by Kim et al. [24], Rahardjo et al. [46] and Strauch et al. [51] indicated that climate change resulted in higher rainfall intensity with lesser frequency of rainy days. In addition, more water vapour is retained in the atmosphere due to the increase in average air temperature, which causes an exponential increase in the water vapour carrying capacity of the air [37]. Significant amount of rainfalls attributed to the changes in global climatic conditions may result in more frequent of rainfall-induced slope failures which affect properties and human lives as studied by Ciabatta et al. [8]. Rahardjo et al. [45] carried out research works on residual soil slopes. They observed that high and steep residual soil slopes can stand safely during dry periods. These slopes only failed during rainy periods. This fact is associated with the presence of an additional shear strength within the unsaturated zone [13] above the groundwater table.in residual soil slope. Hence, the slope is stable with a high factor of safety during dry periods (Fig. 1). However, the infiltration of rainwater during rainfall affects the negative pore-water pressure, resulting in a decrease in the additional shear strength within the unsaturated zone. As a result, the slope is more

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Section: Seepage Deformation and Stability Analysesmentioning

confidence: 99%

Role of unsaturated soil mechanics in geotechnical engineering

2019

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“…While Sadeghiye and Shahrak gharb areas are located in west and north-west of Tehran respectively. Additional pull-out the data have been taken from [11]. Information for the data type for each of sites has been presented in Table 1.…”

Section: Experimental Data and Filed Workmentioning

confidence: 99%

“…The numerous of last studies have assessed the pull-out conduct of gravity and pressure grouting nailing by using numerical simulation and laboratory or field tests [4,6]. Some of the previous research on bound strength and nailing system displacement are [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

New study on interactional effects of grouting pressure on the displacement of nailing bond

Maedeh¹,

Wu²,

Ghanbari³

et al. 2018

J. meas. eng.

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The maximum displacement in a soil nail bond system considering the pull-out, overburden load and grouting pressure effects has been evaluated. The Pull-out tests were carried out in five sites that located in Tehran, Iran. Moreover, additional pull-out test data from South Korea is considered. The displacement of the nailing system due to gravity and pressure grouting has been measured. Based on achieved data, four practical relationships between bound strength and pull-out displacements are developed. The parameters overburden load, grouting pressure, borehole diameter, moisture content and soil's strength parameters have been chosen as the major inputs for the relationships. The correlation coefficients of the linear relationship range have been achieved between 0.89 and 0.99. While by using the multi-layer neural network for estimating it has been illustrated approximately 0.95.

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“…The comparative study shows that the two-dimensional predictions require more reinforcement than the threedimensional analyses. Kim et al (2013) proposed a threedimensional finite element model to analyze the stability of a slope reinforced with pressure-grouted soil nails. These studies used coupled stress-displacement numerical simulations that employ advanced constitutive models to investigate reinforced earth structures.…”

Section: Introductionmentioning

confidence: 99%