Centrifuge Model Tests on Bearing Capacity And Deformation of Sand Layer Overlying Clay

Okamura, Mitsu; Takemura, Jiro; Kimura, Tsutomu

doi:10.3208/sandf.37.73

Cited by 58 publications

(32 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Okamura et al [8] compared the factors as thickness of sand, strength of clay and width, shape and embedment of footing, as well as calculated bearing capacities to the results of wellconditioned centrifuge tests by [6] to verify the validity of the previous methods. It has been confirmed that reasonable assumptions in which the variation of the shape of the sand block and the forces related to the factors taken into consideration are important to obtain a reasonable prediction, as shown in Fig.(3).…”

Section: Analytical Approachesmentioning

confidence: 99%

“…Digital photos were taken before and after loading to observe the behavior of sand overlying clay, mode of the failure, and dimensions of the rupture zone. The loading was stopped after sudden big drop in the proving ring reading or after settlement = 40% of the footing width, (S/B = 40%), as set by Okamura [6], except for case of using loose sand as upper layer, where …”

Section: Experimental Workmentioning

confidence: 99%

“…Dembicki and Odrobinski [1], Hanna [2], Abdrabbo et al [3], and Kenny and Andrawes [4], and Ramadan [5]. Centrifuge tests were performed by others as Okamura et al [6], and Brown et al [7]. The main conclusions of these studies can be summarized as follows: 1) Changing the composition of soil from a dense sand bed to dense sand layer overlying medium clay cause the mode of failure for the surface footing to change from general shear failure to punching shear failure in the upper sand associated with local shear failure in the underlying clay.…”

Section: Experimental Researchmentioning

confidence: 99%

See 2 more Smart Citations

Bearing Capacity of Sand Overlying Clay

2015

IJSR

View full text Add to dashboard Cite

Soil naturally occurs in deposited layers. Each layer of the soil may be assumed to be homogeneous, although the strength properties of adjacent layers are quite different. The present study aims mainly to investigate the behavior of footing under vertical central load placed on the surface of two layered soil. The study has been carried out for the bearing capacity of sand overlying clay. Experimental and numerical works have been carried out. A review of previous researches is given and a discussion is presented of the dimensionless relationships that govern the behavior of this type of foundation. The results are presented in terms of the ultimate bearing capacity, load-settlement curves, and non-dimensional relationships to show the effect of upper layer thickness to footing width ratio, (H/B), and the strength of the upper layer soil on the bearing capacity. In addition, modes of failure of the foundation soil system are also presented.

show abstract

Section: Analytical Approachesmentioning

confidence: 99%

Section: Experimental Workmentioning

confidence: 99%

Section: Experimental Researchmentioning

confidence: 99%

See 1 more Smart Citation

Bearing Capacity of Sand Overlying Clay

2015

IJSR

View full text Add to dashboard Cite

show abstract

“…The kinematic hardening model for cyclic loads and the gapping-contact interaction model on the interface of the foundation and the ground were developed and implemented (Chatzigogos et al, 2009 Using a series of centrifuge tests, a bearing capacity problem of two-layered soils was investigated by Okamura et al (1997), where a sand layer was overlaid over a soft clay layer. Murakami et al (1996) carried out numerical simulations with the use of Cosserat media to take the bending resistance of the surface crust into account.…”

Section: Macro Element Concept and Its Application To Shallow Foundatmentioning

confidence: 99%

Foundations

Kusakabe

Kobayashi

2010

Soils and Foundations

View full text Add to dashboard Cite

Foundation engineering emerged as a discipline of modern engineering science in 1940s.Design and analysis as well as practice of foundation engineering have made a signiˆcant progress up to the present time.This paper gives an overview of the development of foundation engineering, mainly referring to papers published in Soils and Foundations.The paper describes the theoretical development of foundation analysis and a recent increasing trend of foundation practice of adopting various hybrid foundations.The paper points out the importance of environmental considerations in foundation design and practice, including low noise and vibration reduction, reuse of existing foundations and use of natural energy through foundation elements.The paper then provides authors'views of future directions in foundation studies and practice.

show abstract

“…Few results concern intermediate soils made of a mixture of sand and clay (Rossato et al, 1992;Kimura et al, 1994), which are both cohesive and frictional. The present study provides new results about the elastic properties of intermediate unsaturated soils made of mixtures of sand and clay, identiˆed using the bender-extender elements testing device.…”

Section: Introductionmentioning

confidence: 99%

Elastic Parameters of Intermediate Soils Based on Bender-Extender Elements Pulse Tests

Murillo

Sharifipour

Caicedo

et al. 2011

Soils and Foundations

View full text Add to dashboard Cite

The elastic behaviour of compacted soils subjected to very small strains (smaller than 10 -5 ) is essential, because the serviceability of most geotechnical structures depends on soil elastic properties. Small-strain stiŠness of soils was studied in the past years using diŠerent experimental devices (mainly resonant columns). However, the results have been relatively inconsistent. The bender elements technique, now extensively used in soil mechanics, oŠers an e‹cient non destructive alternative, since it is based on the propagation of shear waves. To enrich the common bender elements testing results providing only shear modulus values, an evolution of the bender elements technique, named bender-extender element's is used in this paper. This device allows the simultaneous measurement of the shear and compression wave velocities. As a result, the two independent elastic constants are measured for the same sample in order to avoid indirect estimations. Also, for unconˆned sample's the GrindoSonic test is performed: this test is based on the transient vibrational response of the sample to a slight shock. The present study provides new results about the elastic properties of intermediate unsaturated soils made of mixtures of sand and clay. The results for the elastic properties are presented as a function of the suction level. Finally, a model relating the elastic behaviour of these unsaturated soils is proposed.

show abstract

Centrifuge Model Tests on Bearing Capacity And Deformation of Sand Layer Overlying Clay

Cited by 58 publications

References 10 publications

Bearing Capacity of Sand Overlying Clay

Bearing Capacity of Sand Overlying Clay

Foundations

Elastic Parameters of Intermediate Soils Based on Bender-Extender Elements Pulse Tests

Contact Info

Product

Resources

About