Property of Gabion Laid Between the Head Part of Improvement Pile and Concrete Slab for Pile Slab Track

Nonaka, Takahiro; Kojima, K.; Yonezawa, Toyoji; Sato, Takashi; Morino, Tatsuya; Aoki, Hifumi

doi:10.5030/jcigsjournal.27.93

Cited by 5 publications

(4 citation statements)

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“…In verifying the effectiveness of the proposed foundations, the compressive characteristics of soilbags is crucial. Although the cyclic shear characteristics of geotextile soilbags have been clarified by the past experiments [7], the compressive characteristics of geotextile soilbags is not clarified sufficiently. Therefore, in this study, a compression test on geotextile soilbags (hereinafter simply called "soilbags") was conducted and the compressive characteristics of soilbags was carefully investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is expected that soilbags will be utilised as the method of improving soft ground beneath the footing. It should be noted that the geotextile soilbags [7], which consist of geotextile and crushed stone, are assumed to be adopted in the proposed foundation instead of general soilbags often Figure 1: Schematic view of foundation by replacing soft soil beneath footing with soilbags. [5] Supporting ground Soilbag Soft ground (a few meters) Pier used in disaster recovery.…”

Section: Introductionmentioning

confidence: 99%

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Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

Doi¹,

Murono²,

Cho³

2020

IJCI

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It is known that response acceleration of superstructure supported by spread foundation will decrease due to the rocking of the footing when subjected to earthquake loading, which makes it possible to reduce the cross section of the pier supporting the superstructure. However, supporting ground of a spread foundation should have enough bearing capacity. Therefore, when a spread foundation is constructed on soft ground, it should be improved by replacement of gravel or ground improvement method to increase the bearing capacity. The authors have already proposed a foundation by replacing the soft ground beneath a footing with soilbags. It is well-known that soilbags will receive much larger compressive force than filled material only. Thus, it is expected that soilbags will withstand large load beneath the footing even during earthquake. In verifying the effectiveness of the proposed foundations, the compressive characteristics of soilbags is crucial. Therefore, in this study, a compression test on soilbags was conducted and the compressive characteristics of soilbags was carefully investigated. Moreover, numerical simulation of the compression test was carried out and the mechanism of compression deformation of soilbags was examined. The calculated results coincided almost exactly with the experimental results. The calculated results also showed that vertical stress was largely shared by the centre part of soilbags, where restraint effect of a bag was more prominent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

Doi¹,

Murono²,

Cho³

2020

IJCI

View full text Add to dashboard Cite

show abstract

“…Thus, it is expected that soilbags will be utilised as the method of improving soft ground beneath the footing. It should be noted that the geotextile soilbags [7], which consist of geotextile and crushed stone, are assumed to be adopted in the proposed foundation instead of general soilbags often used in disaster recovery. That is because quite large compressive force will act beneath the footing of railway piers during an earthquake.…”

Section: Introductionmentioning

confidence: 99%

Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

Doi¹,

Murono²,

Cho³

2020

World Congress on Civil, Structural, and Environmental Engineering

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It is known that response acceleration of superstructure supported by spread foundation will decrease due to the rocking of the footing when subjected to earthquake loading, which makes it possible to reduce the cross section of the pier supporting the superstructure. However, supporting ground of a spread foundation should have enough bearing capacity. Therefore, when a spread foundation is constructed on soft ground, it should be improved by replacement of gravel or ground improvement method to increase the bearing capacity. The authors have already proposed a foundation by replacing the soft ground beneath a footing with soilbags. It is wellknown that soilbags will receive much larger compressive force than filled material only. Thus, it is expected that soilbags will withstand large load beneath the footing even during earthquake. In verifying the effectiveness of the proposed foundations, the compressive characteristics of soilbags is crucial. Therefore, in this study, a compression test on soilbags was conducted and the compressive characteristics of soilbags was carefully investigated. Moreover, numerical simulation of the compression test was carried out and the mechanism of compression deformation of soilbags was examined. The calculated results coincided almost exactly with the experimental results. The calculated results also showed that vertical stress was largely shared by the centre part of soilbags, where restraint effect of a bag was more prominent.

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“…Therefore, soilbags are not expected to plasticize or be severely damaged, which prevents the concentration of stress on the piles located on the edge of the footing and on the soft ground beneath the soilbags. It should be noted that it is assumed that geotextile soilbags [8], consisting of geotextile and crushed stone, will be adopted for the developed structure instead of general soilbags often used in disaster recovery. That is because geotextile soilbags have a larger compression strength and rigidity, thus those are suited to lay beneath the footing of railway structure where large compressive force acts.…”

Section: Introductionmentioning

confidence: 99%

<b>Development of Spread Foundation Composed of Micropiles and Soilbags to Reduce Seismic Response of Structures</b>

Doi

Yamada²,

Murono

et al. 2020

Q. rep. RTRI

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The authors have developed a new type of foundation composed of micropiles and soilbags. The foundations are characterized by the laying of soilbags on pile heads and the construction of structures such as piers and rigid frame viaducts on the soilbags. The expected benefits are elimination of the need for pile-footing connections, a smaller diameter of piles, and a reduction in the response acceleration of structures. In this study, in order to clarify the characteristics of the seismic response of the developed structure, shaking table tests targeting piers on the supporting ground and on the developed structure were carried out. Moreover, reproduction analyses of shaking table tests were conducted using a 2D FEM model, and the seismic response of the developed structure was successfully reproduced using the proposed analysis model.

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Property of Gabion Laid Between the Head Part of Improvement Pile and Concrete Slab for Pile Slab Track

Cited by 5 publications

References 0 publications

Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

Model Test and Corresponding Simulation on Compressive Characteristics of Soilbags

<b>Development of Spread Foundation Composed of Micropiles and Soilbags to Reduce Seismic Response of Structures</b>

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