Estimation of deformation modulus of gravelly soils using dynamic cone penetration tests

Shahien, M.; Farouk, Ahmed

doi:10.1016/j.asej.2013.01.008

Cited by 14 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An approximation for the shear strength of compacted soils has been reported by ASTM D 4318, and the reported range is 150 kPa to 250 kPa [29]. Plate load tests on a reclaimed site in Egypt, along with dynamic cone penetration tests, have been employed to determine a correlation to estimate deformation modulus of gravelly soils [30]. Standard penetration resistance (N) also correlates well with soil's in-place density [31].…”

Section: Literature Reviewmentioning

confidence: 99%

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Arshid

Kamal

2020

Civ Eng J

View full text Add to dashboard Cite

Soil is remoulded, replaced, or improved in place to meet the required engineering properties. Relative compaction is the measure of the resulting engineering improvement. But design engineers need the allowable bearing capacity while the modulus of subgrade reaction is the primary input of modern foundation design software. The current research appraised a correlation between Relative Compaction ( ), Moisture Content ( ), and allowable bearing capacity ( ) and another correlation between , RC, MC, and modulus of subgrade reaction ( ). The test samples were extracted from each trial of the standard proctor test using purpose-built extraction tubes. Allowable bearing capacity has been determined by performing unconfined compression tests on the extracted tubes. The relationships have been established employing statistical analysis. It was noticed that soil samples at the lower moisture content (6-9%) show brittle failure before reaching the allowable strain. The soil samples having a moisture content of 10-14% exhibited shear failure, nearly simultaneous to the allowable strain. The soil samples having higher moisture content undergone a strain of 15% without showing the shear failure. A simple equation has also been appraised to determined Ks involving the three-input variable, i.e., , , and . Moderate correlations have been found to exist between the studied parameters, owing to some other variables' influence. Recommendations for future studies have been drawn to quantify the effect of identified parameters. Doi: 10.28991/cej-2020-03091606 Full Text: PDF

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Arshid

Kamal

2020

Civ Eng J

View full text Add to dashboard Cite

show abstract

“…Researchers and scientific societies utilize various methods for determining the deformation modulus such as direct measurement using in-situ tests, indirect estimations based on rock mass classification methods, laboratorial result generalization for rock mass, etc [1][2][3][4][5][6][7][8][9][10][11][12]. The results obtained by all these methods are not of the same reliability; furthermore, the direct measurement method by use of in-situ test is ranked as the most reliable [7].…”

Section: Introductionmentioning

confidence: 98%

Prediction of representative deformation modulus of longwall panel roof rock strata using Mamdani fuzzy system

Rezaei

Asadizadeh

Majdi

et al. 2015

International Journal of Mining Science and Technology

View full text Add to dashboard Cite

a b s t r a c tDeformation modulus is the important parameter in stability analysis of tunnels, dams and mining structures. In this paper, two predictive models including Mamdani fuzzy system (MFS) and multivariable regression analysis (MVRA) were developed to predict deformation modulus based on data obtained from dilatometer tests carried out in Bakhtiary dam site and additional data collected from longwall coal mines. Models inputs were considered to be rock quality designation, overburden height, weathering, unconfined compressive strength, bedding inclination to core axis, joint roughness coefficient and fill thickness. To control the models performance, calculating indices such as root mean square error (RMSE), variance account for (VAF) and determination coefficient (R 2 ) were used. The MFS results show the significant prediction accuracy along with high performance compared to MVRA results. Finally, the sensitivity analysis of MFS results shows that the most and the least effective parameters on deformation modulus are weathering and overburden height, respectively.

show abstract

“…Meanwhile, the type of infiltration failure of CGS fillers reflects the in- ternal structural stability of soil particles under specific particle composition and compactness degree [11]. Furthermore, the methods to estimate the deformation modulus of compacted CGS fillers were also developed [12,13]. For the influence of the stiffness modulus, both the maximum dry density (MDD) and the optimum moisture content (OMC) were proved as the main factors by the portable falling weight deflectometer (PFWD), which is also currently and widely used in rapidly estimating the modulus of the structure intergradation of pavement or roadbed [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Vertical Dynamic Stress Attenuation for Compacted Coarse-Grained Soils

SUN¹,

Fang

SHU

et al. 2022

Journal of Sustainable Construction Materials and Technologies

View full text Add to dashboard Cite

Coarse-grained soil (CGS), as a filler with the characteristics of high bearing capacity but difficult compaction for embankment construction, requires an appropriate thickness of a single compaction layer according to the influence depth of vertical dynamic stress. In this paper, a numerical analysis using PFC2D was conducted by following a scale model test with different particle gradations of compacted CGS fillers by adopting a modified PFWD. The results show that the influence depth is about 50 cm under the impact maximum stress 0.066 MPa if defined the depth as the maximum stress attenuation to 20%. The compacted CGS filler with the dense particle gradation and high strength has a rapid attenuation on vertical dynamic stress. Meanwhile, with the increase of stone content (P5, particle size ≥5 mm), the vertical dynamic stress of compacted CGS is attenuated exponentially. The maximum particle size also affects the attenuation of vertical dynamic stress, which needs further research. The findings support the development of non-destructive devices to rapidly inspect the compactness of subgrade construction.

show abstract

Estimation of deformation modulus of gravelly soils using dynamic cone penetration tests

Cited by 14 publications

References 4 publications

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Appraisal of Bearing Capacity and Modulus of Subgrade Reaction of Refilled Soils

Prediction of representative deformation modulus of longwall panel roof rock strata using Mamdani fuzzy system

An Evaluation of Vertical Dynamic Stress Attenuation for Compacted Coarse-Grained Soils

Contact Info

Product

Resources

About