Effects of Reinforcement on Liquefaction Resistance of Solani Sand

Maheshwari, B. K.; Singh, H. P.; Saran, Swami

doi:10.1061/(asce)gt.1943-5606.0000645

Cited by 93 publications

(21 citation statements)

References 17 publications

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“…These results showed that the tensile strength of soil can be improved obviously with the fibers [1][2][3][4][5][6][7]. On the other hand, recent studies on liquefaction potential of fiber-reinforced soil have shown that the liquefaction of retaining structures, embankments and subgrade soil was influenced by fiber content, fiber length and number of loading cycles [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles

Niu

Liu

Orakoğlu

2017

Soil Dynamics and Earthquake Engineering

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This research presents the dynamic behavior of fiber-reinforced soil exposed to freeze-thaw cycles. The series of dynamic triaxial tests were conducted on fine-grained soil mixed with different percentages of basalt and glass fibers subjected to freeze-thaw cycles. The results showed that after freeze-thaw cycles, with the addition of basalt and glass fibers, the damping ratio and the shear modulus increased at a constant confining pressure because of the increase of stiffness, but the shear modulus decreased with increasing shear strain. Moreover, the theoretical analytical formulations were developed to define for dynamic shear stress and dynamic shear modulus. The parameters were predicted by Hardin-Drnevich model and Kondner-Zelasko model. The shear modulus was expressed as a function of freeze-thaw cycles, fiber contents, confining pressure and initial water content. Finally, ten coefficients were calibrated by analyzing the experimental results and then employed to describe dynamic shear modulus of the fiber-reinforced soil.

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Section: Introductionmentioning

confidence: 99%

Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles

Niu

Liu

Orakoğlu

2017

Soil Dynamics and Earthquake Engineering

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“…The sand is collected from Solani Riverbed near Roorkee. The effects of fines and reinforcement on Solani sand were also presented [16,17].…”

Section: Introductionmentioning

confidence: 99%

Liquefaction Potential of Roorkee Region Using Field and Laboratory Tests

Muley

Maheshwari

Paul

2015

Int. J. of Geosynth. and Ground Eng.

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Before taking up the ground improvement of a site, assessment of liquefaction potential of a region is very important. This also helps in seismic microzonation of the area. It can be rationally performed if the data of site (using either field tests or laboratory tests) are available. The aim of the present study is to evaluate liquefaction potential of Roorkee (India) region. For this purpose the liquefaction resistance of the soil, within the radius of 30 km of Roorkee, was evaluated using two different approaches. First is the field approach based on standard penetration test (SPT) N-Value and second is the laboratory approach employing mean grain size distribution (D 50 ). Investigation was carried out at five different locations by conducting SPT tests and collecting soil samples at regular interval. The cyclic shear stress due to earthquake loading was examined using simplified method as well as using ground response analysis. The factor of safety against liquefaction was evaluated at different depths for all the sites using both field and laboratory data. It was found that the factor of safety against the liquefaction using field approach is marginally greater than that using the laboratory approach for all the sites. Also the factor of safety using ground response analysis is significantly smaller than that using simplified method. Thus it was concluded that use of simplified method may not be adequate.

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“…Under undrained cyclic loading, soil element tests show that fibre reinforcement increases the liquefaction resistance of sand, demonstrated by the increasing number of load cycles required to cause liquefaction [8][9][10]. Shaking table tests on fibre reinforced sand give a similar conclusion, showing that fibre inclusions decrease the peak excess pore water pressure during shaking and delay the occurrence of softening and liquefaction [11]. Under undrained monotonic loading, soil elements tests have showed that fibre inclusions can eliminate the strain-softening altogether making static liquefaction impossible [12].…”

Section: Introductionmentioning

confidence: 86%

Drained volumetric behaviour and static liquefaction of very loose sand reinforced with synthetic fibres

Zhang

Russell

2019

E3S Web Conf.

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Synthetic fibres may be used to reinforce soils. Fibre reinforcement may, for example, improve the mechanical behaviour of very loose sand which is usually susceptible to static liquefaction. In this study, two types of polypropylene fibres are mixed into sand to explore the effect of fibre reinforcement on drained volumetric behaviour and undrained static liquefaction. Drained and undrained stress-controlled triaxial compression tests are conducted on both unreinforced and fibre reinforced samples which are in very loose states. It is observed that, under drained compression, both unreinforced and fibre reinforced samples show volumetric contraction. In undrained compression the excess pore water pressure eventually becomes almost equal to the initial confining stress in all samples. This represents a state of liquefaction in unreinforced samples, and they become fluidised indicating the effective stress has become zero. However, in reinforced samples, the fluidised condition is absent, indicating that a conventional type of liquefaction has not occurred. It is concluded that static liquefaction in very loose sand can be prevented by fibre reinforcement, as the induced tensile stress in fibres makes the effective stress (that is the stress carried by the soil skeleton) remain above zero even when the excess pore water pressure is equal to the confining stress.

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Effects of Reinforcement on Liquefaction Resistance of Solani Sand

Cited by 93 publications

References 17 publications

Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles

Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles

Liquefaction Potential of Roorkee Region Using Field and Laboratory Tests

Drained volumetric behaviour and static liquefaction of very loose sand reinforced with synthetic fibres

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