scholarly journals A Study on the Utilization of Clayey Soil as Embankment Material through Model Bearing Capacity Tests

2020 ◽  
Vol 10 (7) ◽  
pp. 2315
Author(s):  
Myoung-Soo Won ◽  
Christine P. Langcuyan ◽  
Yu-Cong Gao
Keyword(s):  
Moisture Content ◽  
Bearing Capacity ◽  
Clayey Soil ◽  
Western Coast ◽  
Silty Clay ◽  
Clayey Soils ◽  
Test Results ◽  
Basic Study ◽  
Dense Sand ◽  
Internal Development

The Saemangeum seawall, located on the western coast of Korea, is 33.8 km long and is known as the longest embankment in the world. The Saemangeum project is underway for road, railway, and port constructions for internal development. In the Saemangeum area, suitable granular soil for embankment material is difficult to obtain. However, silty clay is widely distributed. In this study, a series of model-bearing capacity tests were conducted as a basic study for using clayey soils as embankment materials. The model bearing capacity tests were carried out using a standard metal mold and a customized metal box. The test results showed that clayey soil, with normal moisture content (NMC), exhibited a large deformation and low bearing capacity. However, when the clay was well-compacted, with optimum moisture content (OMC), it exhibited a higher bearing capacity than dense sand. In addition, when crushed gravel and composite geotextiles were placed in the clayey soil with NMC, the bearing capacity was higher than that of dense sand. From the viewpoint of the bearing capacity, it is considered that clayey soil can be used as an embankment material when clay, crushed gravel, and composite geotextiles are properly combined.

scholarly journals Numerical Modeling of Shallow Foundation Behavior Using Soft Soil Model

2022 ◽  
Vol 961 (1) ◽  
pp. 012057
Author(s):  
BA Al-Dawoodi ◽  
MQ Waheed ◽  
FH Rahil
Keyword(s):  
Bearing Capacity ◽  
Clayey Soil ◽  
Soft Soil ◽  
Shallow Foundation ◽  
Clayey Soils ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Element Analysis ◽  
Soil Model ◽  
Different Types

Abstract This study discusses the results of simulation a finite element analysis of the load-settlement curve using soft soil model of shallow foundation subjected to axial load rested on three different types of clayey soils, it was considered different shear strength parameters (C=16, C=25, and C=70). It was concluded for clayey soil of C=16, there was a match to the experimental load – settlement curve using the soft soil model. It was also observed increase in the foundation width led to an increase in bearing capacity, however, bearing capacity increased by around (79 %) for an increase in footing width of (6.25), so it was about (144%) for (12.5).

scholarly journals Using Steel Slag for Stabilizing Clayey Soil in Sulaimani City-Iraq

2020 ◽  
Vol 26 (7) ◽  
pp. 145-157
Author(s):  
Zozk Kawa Abdalqadir ◽  
Nihad Bahaaldeen Salih ◽  
Soran Jabbar Hama Salih
Keyword(s):  
Compressive Strength ◽  
Moisture Content ◽  
Unconfined Compressive Strength ◽  
Clayey Soil ◽  
Steel Slag ◽  
Swelling Pressure ◽  
Geotechnical Properties ◽  
California Bearing Ratio ◽  
Engineering Properties ◽  
Clayey Soils

The clayey soils have the capability to swell and shrink with the variation in moisture content. Soil stabilization is a well-known technique, which is implemented to improve the geotechnical properties of soils. The massive quantities of waste materials are resulting from modern industry methods create disposal hazards in addition to environmental problems. The steel industry has a waste that can be used with low strength and weak engineering properties soils. This study is carried out to evaluate the effect of steel slag (SS) as a by-product of the geotechnical properties of clayey soil. A series of laboratory tests were conducted on natural and stabilized soils. SS was added by 0, 2.5, 5, 10, 15, and 20% to the soil. The conducted tests are consistency limits, specific gravity, hydrometer analysis, modified Proctor compaction, swelling pressure, swelling percent, unconfined compressive strength, and California Bearing Ratio (Soaked CBR). The results showed that the values of liquid limit, plasticity index, optimum moisture content, swelling pressure, and swelling percent were decreased when stabilized the soil. However, the values of maximum dry density, unconfined compressive strength, and California bearing ratio were increased with the addition of steel slag with various percentages to the clayey soil samples. The steel slag was found to be successfully improving the geotechnical properties of clayey soils.

Bearing capacity of foundations on a weak sand layer overlying a strong deposit

1982 ◽  
Vol 19 (3) ◽  
pp. 392-396 ◽  
Author(s):  
A. M. Hanna
Keyword(s):  
Bearing Capacity ◽  
Model Test ◽  
Classical Equation ◽  
Model Tests ◽  
Sand Layer ◽  
Test Results ◽  
Dense Sand ◽  
Design Charts ◽  
Sand Deposit ◽  
Compact Sand

The ultimate bearing capacity of footings resting on subsoils consisting of a weak sand layer overlying a strong deposit has been investigated. Based on model tests of strip and circular footings in a loose or compact sand layer overlying a dense sand deposit, the classical equation of bearing capacity of footings on homogeneous sand was extended to cover cases of these footings in layered sands where the upper layer is the weaker. The theory compared well with the available model test results. Design charts are presented.

scholarly journals Experimental Study of the Bearing Capacity of Stiff Clay Overlying Sand with and without Geotextile Inclusion

2021 ◽  
Vol 9 (3) ◽  
pp. 119-126
Author(s):  
Bahga Mustafa ◽  
Ahmed M. Elsharief
Keyword(s):  
Bearing Capacity ◽  
Large Strain ◽  
Bottom Layer ◽  
Test Results ◽  
Dense Sand ◽  
Theoretical Approaches ◽  
Maximum Benefit ◽  
Potential Benefits ◽  
Load Tests ◽  
Stiff Clay

The objective of this study is to investigate the potential benefits of using reinforcement inclusion to improve the bearing capacity of stiff clay over very loose to medium dense sand. Model load tests were performed on two layered systems, namely stiff clay over very loose, loose, medium dense sand with and without geotextile inclusion between the two layers and on stiff clay only. The load-settlement curves were plotted from the experimental test results, and the ultimate bearing capacity was obtained using Log – Log (L-L), Tangent (TIM), 0.1B and Hyperbolic (HYP) methods. Theoretical approaches were used to compute the ultimate bearing capacities of the tests without and with reinforcement. The test results have shown an increase in the ultimate bearing capacities due to increase in the relative densities of the bottom sand layer. The bearing capacity increased significantly with the inclusion of geotextile layer. The bearing capacity ratio (BCR) for the case of very loose sand as bottom layer was the highest compared to loose and medium dense cases. Load - settlement curve of the pure clay test plots above or is identical to the load - settlement curve of stiff clay overlying medium dense sand with geotextile layer. The maximum benefit for the geotextile inclusion was gained at large strain when the sand was very loose. The analytical methods were generally in good agreement with the experimental model test results obtained by the 0.1B method.  

scholarly journals Improvement of Bearing Capacity of Shallow Foundation on Geogrid Reinforced Silty Clay and Sand

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
P. K. Kolay ◽  
S. Kumar ◽  
D. Tiwari
Keyword(s):  
Bearing Capacity ◽  
Research Work ◽  
Reinforced Soil ◽  
Shallow Foundation ◽  
Silty Clay ◽  
Sand Layer ◽  
Test Results ◽  
Soil System ◽  
Different Depths ◽  
Silty Clay Soil

The present study investigates the improvement in the bearing capacity of silty clay soil with thin sand layer on top and placing geogrids at different depths. Model tests were performed for a rectangular footing resting on top of the soil to establish the load versus settlement curves of unreinforced and reinforced soil system. The test results focus on the improvement in bearing capacity of silty clay and sand on unreinforced and reinforced soil system in non-dimensional form, that is, BCR. The results show that bearing capacity increases significantly with the increased number of geogrid layers. The bearing capacity for the soil increases with an average of 16.67% using one geogrid layer at interface of soils with equal to 0.667 and the bearing capacity increases with an average of 33.33% while using one geogrid in middle of sand layer with equal to 0.33. The improvement in bearing capacity for sand underlain silty clay maintaining and equal to 0.33; for two, three and four number geogrid layer were 44.44%, 61.11%, 72.22%, respectively. The finding of this research work may be useful to improve the bearing capacity of soil for shallow foundation and pavement design for similar type of soil available elsewhere.

scholarly journals Prediction of Effects of Geogrid Reinforced Granular Fill on the Behaviour of Static Liquefaction

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
A. Hemalatha ◽  
N. Mahendran ◽  
G. Ganesh Prabhu
Keyword(s):  
Bearing Capacity ◽  
Load Test ◽  
Test Results ◽  
Plate Load Test ◽  
Large Size ◽  
Static Liquefaction ◽  
Granular Fill ◽  
Size Dimension ◽  
Subgrade Modulus ◽  
Different Thickness

The experimental investigation on the effects of granular fill and geogrid reinforced granular fill on the behaviour of the static liquefaction potential of the subsoil is reported in this study. A series of plate load test were carried out with different thickness of the granular fill, number of geogrid layers, and size/dimension of the footing. The test results were presented in terms of bearing capacity and subgrade modulus for the settlement ofδ10,δ15, andδ20. The experimental results revealed that the introduction of granular fill significantly increases the bearing capacity and effectively control the settlement behaviour of the footing. The introduction of geogrid in granular fill enhanced the Percentage of Control in Settlement and Bearing Capacity Ratio by a maximum of 328.54% and 203.41%, respectively. The introduction of geogrid in granular fill interrupts the failure zone of the granular fill and enhances the subgrade modulus of the footing by a maximum of 255.55%; in addition subgrade modulus of the footing was increased with an increase in the number of geogrid layers. Based on the test results it is suggested that the footing with large size has beneficial improvement on the reinforced granular fill.

Experimental Investigation for Horizontal Ultimate Bearing Capacity and Target Ductility Factor Improvement Results of the RC Column Reinforced by AFL with Damages

2014 ◽  
Vol 488-489 ◽  
pp. 497-500
Author(s):  
You Lin Zou ◽  
Pei Yan Huang
Keyword(s):  
Bearing Capacity ◽  
Ultimate Bearing Capacity ◽  
Test Results ◽  
Rc Columns ◽  
Static Test ◽  
Rc Column ◽  
Ductility Factor ◽  
Secant Stiffness ◽  
Function Relationship ◽  
Reversed Cyclic

Deem test results from the low reversed cyclic loading quasi-static test with 2 RC columns as the basic information of secant stiffness damage of the reference column and take use of the TMS instrument in the test to artificially make the damage percentage of secant stiffness of the RC column as 33%, 50% and 66%, 6 damaged columns in total; reinforce the 6 damaged columns and 2 undamaged ones under the same conditions with AFL, through quasi-static contrast test. Test results show that it is able to effectively boost horizontal ultimate bearing capacity and ductility deformability of the RC columns with AFL for reinforcement; besides, there is a linear function relationship between horizontal ultimate bearing capacity, target ductility factor, and damage percentage of secant stiffness.

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