O precyzji sondowania statycznego na przykładzie badań gruntów przejściowych poletka badawczego AMU Morasko

Wierzbicki, J.; Młynarek, Z.; Wołyński, Waldemar

doi:10.7306/2020.25

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the carried out tests enabled the collection of a large and representative dataset, which was compiled in the histograms (Figs. [10][11][12][13]. They represent the characteristic values of penetration resistance of soundings for the Praski terrace sands.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of CPTu static sounding parameters based on DPH dynamic probing heavy test on the example of “the Praski terrace” sands inWarsaw title

Zawrzykraj,

Bąkowska

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

This paper attempts to relate the parameters obtained from CPTu static sounding and DPH dynamic test conducted in non-cohesive alluvial deposits of the Vistula River. The investigation was carried out in eight test stations located on the left bank of the Vistula River in Warsaw. The presented theses were based on the results of static CPTU and dynamic DPH tests obtained at 8 test stations. Additionally, in order to associate the obtained sounding results to the lithological type of the tested medium, drillings and grain size analyses were performed. The correlation of the different test methods stems from the need to identify and explain observed discrepancies against the background of different geological conditions, such as moisture content or grain size distribution. The comparative analysis of the parameters obtained from static and dynamic probing, is relevant to the alluvial sediments formed the lower over-flood terrace (called “the Praski terrace”) of Warsaw. Based on the comparison this paper proposes a correlation between the cone penetration resistance the sleeve friction and the number of blows, expressed by the functional relationship. Differences in the matching formulas were shown depending on the saturation of the tested sediments. Correlations were referred to a soil type, which enabled to specify the range of applicability of the proposed relationships. The results of the study were further used to show their diversity using statistical methods. This made it possible to assess the variability of the parameters of the non-cohesive soil, which forms a single lithogenetic unit.

show abstract

Section: Resultsmentioning

confidence: 99%

“…CPTu static sounding and DPH dynamic probing are widely used to assess the geotechnical parameters of the subsoil [1][2][3][4][5][6][7][8][9][10][11]. These two methods differ significantly in the way of penetration of the cone, the required equipment, measured parameters and interpretation possibilities [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Prediction of CPTu static sounding parameters based on DPH dynamic probing heavy test on the example of “the Praski terrace” sands inWarsaw title

Zawrzykraj,

Bąkowska

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Quite different conclusions were reached by Beren et al [27], who, using shear rates ranging from 0.05 to 5 mm•min −1 in their study of sand samples without and with saturation, showed that the internal friction angle and peak shear strength increased with increasing velocity, particularly for velocities greater than 1 mm•min −1 . Radaszewski and Stefaniak [28] compared the results of field tests of undrained shear strength and shear strength from the direct shear apparatus of silty soils (saSi, clSi) taken from around Poznań (Poland). They showed that the deformation range of up to 10% used in the direct shear apparatus is insufficient to obtain the peak value of the soil shear strength.…”

Section: Shear Strengthmentioning

confidence: 99%

Effect of shear rate and saturation on shear strength of mineral and anthropogenic soil

Gruchot,

Zydron

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

The aim of the study was to determine the shear strength of mineral and anthropogenic soil of similar grain size as a function of the applied shear rate and water saturation. Stability calculations using the finite element method of the road embankment model were also carried out to demonstrate the variation in factor of safety values depending on the adopted values of the angle of internal friction and cohesion. The tests were carried out in a direct shear apparatus in a 100 x 100 mm box with a sample height of 20.5 mm. The samples were formed directly in the apparatus box at optimum moisture content until a compaction index of IS = 1.00 was obtained. Tests were carried out under conditions without and with water saturation at shear rates of 0.01, 0.05, 0.1, 0.5 and 1.0 mm•min–1 until 18% horizontal displacement was achieved. The results showed that the effect of shear rate on the strength parameters was not unequivocal and was much smaller than the changes caused by saturation of samples. An increase in shear rate resulted in small changes in the angle of internal friction with a tendency towards a decrease. In contrast, cohesion varied over a much larger range with increasing shear rate, with an apparent initial decrease and subsequent increase. The saturation of the samples resulted in a decrease in the angle of internal friction of the cohesive soil and an increase for the ash-slag mixture. The cohesion of both soils decreased. The results obtained from the road embankment model stability calculations confirmed that soil saturation had a greater influence on the factor of safety values obtained than the shear rate.

show abstract

O precyzji sondowania statycznego na przykładzie badań gruntów przejściowych poletka badawczego AMU Morasko

Cited by 2 publications

References 0 publications

Prediction of CPTu static sounding parameters based on DPH dynamic probing heavy test on the example of “the Praski terrace” sands inWarsaw title

Prediction of CPTu static sounding parameters based on DPH dynamic probing heavy test on the example of “the Praski terrace” sands inWarsaw title

Effect of shear rate and saturation on shear strength of mineral and anthropogenic soil

Contact Info

Product

Resources

About