Influence of relative density on the cyclic shear strength of sands

This paper presents a laboratory study of the influence of relative density on the liquefaction potential of a soil. The study is based on undrained triaxial tests that were performed on samples with relative density Id = 0.15, 0.5 and 0.65. The article is composed of three parts. First, we present the materials and characteristics of the studied sands. the second part deals with the procedure and the device used. The third part studies the influence of the relative density on the liquefaction potential of the three sands (Hostun Rf, Chlef and Rass). This study also makes it possible to explore the influence of granulometry on the liquefaction potential. The results of the tests show that concordant results have been obtained which clearly show that the increase of the relative density leads to a significant improvement in the resistance to liquefaction of the sands. This effect is very significant when the initial relative density Id = 0.50 to Id = 0.65.

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ROLE OF FINES ON UNDRAINED CYCLIC SHEAR STRENGTH AND RELATIVE DENSITY OF DECOMPOSED GRANITE SOIL "MASADO"

Journal of Japan Society of Civil Engineers Ser C (Geosphere Engineering) ◽

10.2208/jscejge.69.70 ◽

2013 ◽

Vol 69 (1) ◽

pp. 70-79

Author(s):

Woo-Tae KIM ◽

Masayuki HYODO ◽

Yukio NAKATA ◽

Norimasa YOSHIMOTO ◽

Shohei NODA

Keyword(s):

Shear Strength ◽

Relative Density ◽

Cyclic Shear ◽

Decomposed Granite ◽

Granite Soil

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Experimental Investigation on Shear Strength and Liquefaction Potential of Rubber-Sand Mixtures

Advances in Civil Engineering ◽

10.1155/2019/5934961 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Zhou Enquan ◽

Wang Qiong

Keyword(s):

Shear Strength ◽

Pore Water Pressure ◽

Water Pressure ◽

Construction Materials ◽

Horizontal Displacement ◽

Triaxial Tests ◽

Hyperbolic Model ◽

Liquefaction Potential ◽

Direct Shear Tests ◽

Rubber Particles

The application of scrap tires as construction materials in civil engineering is one of the most promising ways to recycle this pollutant. The objective of this study was to investigate the shear strength and liquefaction potential of saturated rubber-sand mixtures. Direct shear tests and cyclic triaxial tests were conducted on rubber-sand mixtures at various rubber contents. It was found that the addition of rubber particles to sand changed the shear stress-horizontal displacement development. The addition of rubber particles to sand improved the shear strength slightly and improved resistance to liquefaction significantly. Additionally, a hyperbolic model was proposed to describe the pore water pressure generation. This study demonstrates the effect of rubber particles on the physical properties of sand.

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Analisis Potensi Likuifaksi dengan Metode Deterministik di Wilayah Surabaya

Reka Buana Jurnal Ilmiah Teknik Sipil dan Teknik Kimia ◽

10.33366/rekabuana.v4i1.1195 ◽

2019 ◽

Vol 4 (1) ◽

pp. 68

Author(s):

Himatul Farichah ◽

Putu Tantri Kumala Sari

Keyword(s):

Relative Density ◽

Degree Of Saturation ◽

Fine Content ◽

Alluvial Deposits ◽

Liquefaction Potential ◽

Cyclic Shear ◽

Potential Analysis ◽

Cyclic Resistance ◽

Advanced Analysis ◽

Earthquake Potential

Surabaya has an earthquake potential reach to 6.5 Mw. Moreover, on average, Surabaya area is a lowland which is alluvial deposits. Thus, it is required to perform potential liquefaction. Liquefaction potential analysis was performed by taking the soil data from the center of Surabaya. The initial of liquefaction potential analysis was conducted by considering soil gradation, relative density (DR), fine content (FC), degree of saturation (SR) dan SPT number. However, the advanced analysis was undertaken by utilizing Youd and Idriss 2001 dan metode Idriss 2008. The results of initial of liquefaction potential analysis show that the soil has potential to be liquefied at the depth 1-7m, however at the depth 22m the soil is not liquefied. Furthermore, the results of advanced analysis and conclusions of the analysis show that the soil has a liquefied potential at the depth 17 m from the surfaceABSTRAK Kota Surabaya memiliki potensi gempa yang terjadi bisa mencapai 6.5 Mw. Selain itu, Wilayah kota Surabaya merupakan daerah yang rata-rata dataran rendah, yang berkisar 80% merupakan endapan alluvial. Sehingga perlu dilakukan analisis potensi likuifaksi. Analisis potensi likuifaksi hanya dilakukan pada data tanah wilayah Surabaya Pusat. Analisis awal potensi likuifaksi dilakukan berdasarkan aspek gradasi tanah, relative density (DR), fine content (FC), derajat kejenuhan (SR), dan jumlah pukulan SPT. Sedangkan analisis lanjutan dengan menghitung Cyclic Shear Ratio (CSR), Cyclic Resistance Ratio (CRR), dan Factor of safety (FS) dengan menggunakan metode Youd dan Idriss 2001 dan metode Idriss 2008. Berdasarkan analisis awal, pada kedalaman 1-7 m masih ada potensi likuifaksi, sedangkan tidak ada lagi potensi likuifaksi pada kedalaman lebih dari 22 m. Berdasarkan analisis lanjutan dan kesimpulan analisis, hampir semua kedalaman memiliki potensi likuifaksi hingga kedalaman 17m.Kata kunci : Likuifaksi; gempa; analisis potensi likuifaksi

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A Laboratory Study on the Shear Strength Behavior of Two Till Deposits from Northern Germany

Energies ◽

10.3390/en14061692 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1692

Author(s):

Henok Hailemariam ◽

Frank Wuttke

Keyword(s):

Shear Strength ◽

Laboratory Study ◽

Elevated Temperatures ◽

Constitutive Models ◽

Friction Angle ◽

Triaxial Tests ◽

Experimental Program ◽

Soil Behavior ◽

Northern Germany ◽

Triaxial Cell

This paper presents the findings of a laboratory study of the shear strength and yielding behavior of two glacial till soil deposits from the area of Heiligenhafen, northern Germany. The tests were conducted on reconstituted forms of the soils using a triaxial cell capable of controlling the temperature of the specimens. The experimental program included a series of multi-stage consolidated drained (CD) compression triaxial tests at temperature ranges between 20 and 60 °C. For the temperature range considered in this study, a mild reduction in the effective friction angle of the two till soils of less than 1° was observed due to an increase in temperature from 20 to 60 °C. All the results were carefully assessed in view of the intrinsic soil behavior and fabric, and existing trends are highlighted. The findings of this study provide valuable insights into the shearing properties of till deposits, and can contribute to the enhancement of existing soil constitutive models as well as the development of new models that are particularly suited to the behavior of glacial tills under elevated temperatures.

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