Slope Stability in Swelling Soils Using Cement Grout: A Case Study

Daraei, Ako; Herki, B.A.; Sherwani, Aryan Far H.; Zare, Shokrollah

doi:10.1007/s40891-018-0127-9

Cited by 29 publications

(13 citation statements)

References 22 publications

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“…The shear strength would subsequently decrease, resulting in shallow slope instabilities [5,6]. The use of structural measures such as surface and subsurface drainage improvements to minimize infiltration and to lower the groundwater table, construction of retaining structures to support collapsible mass, and internally stabilized systems have long been used to prevent these slope instabilities [7][8][9]. However, the application of vegetation for slope rectification is becoming popular among geotechnical engineers due to its low cost, aesthetic value, and sustainability [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Rajamanthri

Jotisankasa

Aramrak

2021

Int. J. of Geosynth. and Ground Eng.

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Root biomass and plant age have been recognized to influence the hydro-mechanical properties of root-permeated soils, but its direct field observation was scarce. In this study, influences of Chrysopogon zizanioides (vetiver grass) of various plant ages (up to 2 years) on soil-water retention curves (SWRCs), saturated permeability, specific water-retention capacity and soil aggregate stability have been investigated. Undisturbed soil samples were obtained at different locations, representing the root zone, upslope, and downslope from the vetiver hedgerow at three bio-engineered slopes in Western Thailand. As root biomass increased, air-entry suction of soil slightly decreased, and porosity significantly increased due to the formation of macropores and aggregated soil structure in the root zone (0-15 cm depth). Nevertheless, below the root zone (15-25 cm depth), the air-entry suction of soil increased with root biomass due to the occupancy of soil pores by roots. Saturated permeability shows a positive correlation with plant age in the root zone, while a slightly negative correlation was found below the root zone. The upslope and downslope soil samples showed a negative correlation due to the effect of sediment trap. The specific water retention capacity and soil aggregate stability became higher in the root zone and positively correlated with plant age.

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Section: Introductionmentioning

confidence: 99%

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Rajamanthri

Jotisankasa

Aramrak

2021

Int. J. of Geosynth. and Ground Eng.

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“…12. It should be noted that the main evidences of swelling potential including Gilgai topographic, soil hardness under dry conditions, high pH and deep cracks in roughly polygonal patterns in the ground surface [32] were observed nearby in Fig. 7 Monitoring results of unstable stations in Shibli twin tunnels the tunnels.…”

Section: Tunnels Monitoringmentioning

confidence: 93%

Modified criterion for prediction of tunnel deformation in non-squeezing ground conditions

Daraei

Zare

2018

J. Mod. Transport.

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The strength factor-based criterion for tunnel deformation prediction proposed by Hoek in 2000 is reckoned to be the most practical criterion among the tunnel deformation criteria since 1980s. In view of the fact that Hoek's criterion was obtained based on case studies under squeezing ground conditions, it has a limited range of applications, applicable mainly in squeezing tunnels. In this work, this criterion was modified by taking into consideration the conditions of eight unstable stations in three non-squeezing tunnels in Iran to amplify its application range. Relative displacements and strength factor (defined as a strength-to-stress ratio) were obtained in unstable stations first. Then, the parametric values were plotted on a Cartesian coordinate's plane. By using the optimal regression line passing through all points, a criterion for prediction of tunnel deformation was proposed finally. A comparison made between the measured values and the ones predicted by the new criterion shows that the variance accounted for was 77% and the root mean square error was 2%, an acceptable accuracy and a small error implying the effectiveness of the new criterion in tunnel deformation prediction. In addition, the results show that the strength factor of 0.38 can be used to determine the boundary between squeezing and non-squeezing conditions; the behavior and type of failure of the tunnel would be predictable by use of the strength factor.

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“…e saline ions in seawater have erosion effects on soil-cement [7]. erefore, this paper has, in accordance with evaluation index of anti-erosion property of cement described in GB/T 749-2008 test method for determining the capacity of resisting sulfate corrode of cement, designed an evaluation method appropriate to evaluate antierosion property of soil-cement in marine environment; besides, by comparing and analyzing strength difference of soil-cement in freshwater and marine environment, the property of resisting environmental erosion of 2…”

Section: Antierosion Analysismentioning

confidence: 99%

“…Wang and Zheng [5,6] took several different layout plans for soil-cement mixing piles in tunnel excavation for reinforcing the soil mass and discussed protection of different soil-cement reinforced areas on adjacent tunnels. Daraei et al [7] used the soil-cement mixing method to reinforce road slope and studied stability of reinforced road slope. Al-Bared et al [8][9][10] studied the engineering characteristics of marine clay reinforced by recycled ceramic tiles and discussed the beneficial effects of recycled ceramic tiles and tires in partially replacing cement, sand, or stone in concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ferronickel Slag Powder on Strength of Soil in Marine Environment

Chen

Tong

2020

Advances in Civil Engineering

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Over the past few years, soil-cement has been widely used in marine geotechnical engineering; meanwhile, the safety of soil-cement in marine environment has attracted wide attention. In order to study the influence of composite ferronickel slag powder on the strength and micro morphology of soil-cement in marine environment, the composite nickel iron slag powder was added into the soil-cement in this paper. The unconfined compressive strength test, erosion resistance coefficient analysis, SEM, and EDS test analysis of soil-cement were carried out.. Results showed that the marine environment had great influences on the strength of soil-cement, and the addition of compound nickel-iron slag powder can enhance the strength of soil-cement, and the deterioration of the strength of soil-cement is reduced. In addition, the compound ferronickel slag powder has microaggregate effect, morphological effect, and activation effect, which not only improves compaction rate of soil-cement and prevents invasion of erosive ions in marine environment but also has positive effects on the performance of soil-cement.

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Slope Stability in Swelling Soils Using Cement Grout: A Case Study

Cited by 29 publications

References 22 publications

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Modified criterion for prediction of tunnel deformation in non-squeezing ground conditions

Effect of Ferronickel Slag Powder on Strength of Soil in Marine Environment

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