Bearing capacity of strip footings supported on geocell-reinforced sand

Dash, Sujit Kumar

doi:10.1016/s0266-1144(01)00006-1

Cited by 292 publications

(98 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The condition of u/B = 0 is not considered in test series to prevent the early buckling of geocell walls due to direct contact with the bottom of footing. Dash et al reported the reduction of bearing pressure and reinforcement efficiency at u/B=0 [6]. Figure 12 shows the changes in IF versus u/B for footings with various B at s/B = 10% for reinforced sand.…”

Section: Effect Of Reinforcement Depth On Scale Effectmentioning

confidence: 94%

See 1 more Smart Citation

Scale Effects of Footings on Geocell Reinforced Sand Using Large-Scale Tests

2018

View full text Add to dashboard Cite

The scale effect on bearing capacity of shallow footings supported by unreinforced granular soils has been evaluated extensively. However, the subject has not been addressed for shallow footings on geocell-reinforced granular soils. In this study, load-settlement characteristic of large square footings is investigated by performing large-scale loading tests on unreinforced and geocell-reinforced granular soils. The effects of footing width (B), soil relative density of soil (Dr), and reinforcement depth (u) have been investigated. The test results show that the scale effects exist in geocell-reinforced soils, like unreinforced soils, and the behavior of small-scale models of footings cannot be directly related to the behavior of full-scale footings due to the difference between initial conditions of tests and the initial state of mean stresses in the soil beneath the footings having different dimensions. Large footings create higher mean stresses in the soil, resulting in low soil friction angle and initial conditions of the test approach to the critical state lines. The results of tests indicate that model experiments should be conducted on low-density soil for better prediction of the behavior of full-scale footings, otherwise, the predicted behavior of full-scale footings does not seem conservative.

show abstract

Section: Effect Of Reinforcement Depth On Scale Effectmentioning

confidence: 94%

“…The better performance of geocell than planar reinforcements (e.g. geogrid and geotextile) in increasing the bearing capacity and reducing the settlement of shallow footings is well known [6][7][8][9][10]. A numerical simulation of geocell-reinforced foundation beds using FLAC 3D was reported by Oliaei and Kouzegaran.…”

Section: Introductionmentioning

confidence: 99%

Scale Effects of Footings on Geocell Reinforced Sand Using Large-Scale Tests

2018

View full text Add to dashboard Cite

show abstract

“…This value is reported around h=B = 2 beyond which marginal improvement is anticipated [16,19] that is believed to be due to the fact that zone of soil in uenced by the footing loading extends to about two times the footing width [30].…”

Section: E Ect Of Geocell Heightmentioning

confidence: 99%

“…Bathurst and Jarret [15] compared the results of large-scale model tests of geoweb and geogrid cell mattresses over soft subgrade and showed that the sti geoweb shows a better load-settlement response. Dash et al [16] reported optimum values of reinforcement geometry based on experimental tests on geocells made from geogrids. Sireesh et al [17] showed that the provision of geocell mattress over clay subgrade with void can improve the performance substantially, provided that the geocell mattress extends at least a distance equal to the diameter of void.…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement geometry on the performance of a reduced-scale strip footing model supported on geocell reinforced sand

Kargar

Hosseini

2017

Scientia Iranica

View full text Add to dashboard Cite

Abstract. Geocell is an e ective type of geosynthetics for improving the performance of reinforced soil foundations due to provision of lateral con nement for the in ll soil. In this research, in order to study the bearing pressure-settlement response of geocellreinforced sand, a reduced-scale physical model is developed and geocells with various geometrical dimensions (height, pocket size, and width) produced from woven geotextile are used to reinforce sand bed. Strip footing model is then loaded monotonically to ultimate failure level, and the in uence of geocell geometrical properties on the improvement in bearing capacity and settlement of footing is described. The results show that by increasing height and decreasing pocket size of geocell, the bene cial e ect of geocell reinforcement increases substantially. For the highest geocell used in the tests at settlement level of 6%, improvement in bearing capacity and percentage reduction in footing settlement are obtained as 2.1 and 48%, respectively. The optimum width of geocell is determined ve times the foundation width beyond which the improvement e ect is negligible. It is also concluded that substituting a single layer of geocell reinforcement with 2 half-height and 4 quarter-height geocell layers results in 10% and 22% decrease in the ultimate bearing capacity, respectively.

show abstract

“…The geogrid materials had more effect than bamboo materials. Dash et al [25] studied the measurements taken from laboratory experiments for strip plates on reinforced sand. Tensile strength of the reinforcement was not an important argument to compute the effect of the reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Effects of the first reinforcement depth for different types of geosynthetics

2017

View full text Add to dashboard Cite

In this study, the performance of the first reinforcement layer depth for sand subbase of a road or construction was investigated with plate load laboratory tests. Unreinforced and reinforced experiments for different reinforcement types were made by changing the first reinforcement layer depth ratio. One type of geotextile and two different geogrid specimens were used in the research. Load-settlement curves and Bearing Ratios were studied by measuring the results for different settlement ratios. Finally, laboratory measurements of unreinforced and reinforced soil using geotextile reinforcement were compared with Finite Element Model (FEM) analyses modeled under similar conditions. The results demonstrated the effects of different types of reinforcements for different first reinforcement layer locations. The number of reinforcement layers was another parameter which affected the bearing ratio along with the first reinforcement layer depths. It was also observed that the Bearing Ratio (BR) and load-settlement behavior changed significantly with the first reinforcement depth and settlements. Effects on failure modes for unreinforced and reinforced sand soils were compared for each test.

show abstract

Bearing capacity of strip footings supported on geocell-reinforced sand

Cited by 292 publications

References 17 publications

Scale Effects of Footings on Geocell Reinforced Sand Using Large-Scale Tests

Scale Effects of Footings on Geocell Reinforced Sand Using Large-Scale Tests

Effect of reinforcement geometry on the performance of a reduced-scale strip footing model supported on geocell reinforced sand

Effects of the first reinforcement depth for different types of geosynthetics

Contact Info

Product

Resources

About