Prediction of Shear Strength of Fully Weathered Coastal Red Sandstone: Influence of Water Content, Fine Content, and Relative Compaction

As the "Fujian earth-building" have been inscribed by UNESCO in 2008 as World Heritage Site, attentions of protection about the "Fujian earth-building" has getting more and more. This article takes samples of a rammed-earth wall from Yongding earth-buildings and determines the shear strength of the samples with different water content through triaxial compression tests. The influence on shear strength of water content of rammed-earth samples is analyzed. Test results show that the shear strength of rammed-earth has much to do with the water content of the soil, the greater the water content is，the smaller the shear strength is. With water content increasing, cohesion and internal friction angle of rammed-earth were decreases, and its changing trend is of marked characteristic of stage. When water contents of rammed-earth is under some value, its cohesion changes in small ranges; when water contents of rammed-earth is over the value, its cohesion decreases with water content increasing.

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Analisis Pengaruh Fluktuasi Muka Air Waduk terhadap Stabilitas Lereng Waduk Dengan Menggunakan Program Plaxis 2D

MEDIA KOMUNIKASI TEKNIK SIPIL ◽

10.14710/mkts.v24i2.17780 ◽

2019 ◽

Vol 24 (2) ◽

pp. 113

Author(s):

Paravita Sri Wulandari ◽

Daniel Tjandra

Keyword(s):

Shear Strength ◽

Water Content ◽

Water Level ◽

Laboratory Tests ◽

Slope Failure ◽

Soil Characteristics ◽

Soil Samples ◽

Initial Condition ◽

Soil Shear Strength ◽

Influence Of Water

Reservoir is needed as a source of water supply to the surrounding populations. The design of a reservoir needs to consider several aspects of soil embankment such as variations in water content and changes in shear soil shear strength and also the influence of water level in reservoir. The purpose of this research is to analyze these three aspects in the design of a reservoir. This research was begun by taking soil samples for embankment and conducting soil tests to obtain soil characteristics at the initial condition. The further laboratory tests were conducted to determine the effect of changes in water content on the shear strength of the soil. The variation of soil embankment characteristic was then modeled by Plaxis 2D program to obtain the effect of changes in soil embankment characteristic and fluctuation of the water level in the reservoir. The results showed that the increase in water content significantly decrease the shear strength of the soil. The changes of soil shear strength affect the pattern of slope failure and safety factor. In addition, the pattern and direction of the slope failure were also influenced by the water level of the reservoir.

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Influence of water content on the shear strength parameters of clayey soil in relation to stability analysis of a hillside in Brno region

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201361061583 ◽

2013 ◽

Vol 61 (6) ◽

pp. 1583-1588 ◽

Cited By ~ 4

Author(s):

Kristýna Bláhová ◽

Lenka Ševelová ◽

Pavla Pilařová

Keyword(s):

Shear Strength ◽

Stability Analysis ◽

Water Content ◽

Clayey Soil ◽

Friction Angle ◽

Dry Density ◽

Stability Analyses ◽

Influence Of Water ◽

Moisture Conditions ◽

Processing Stability

Shear strength of soils is highly affected by moisture conditions (i.e. water content), especially if the soil contains clay materials. Usually the laboratory specimen, which are used to determine shear strength of soil are prepared at water content and dry density same as in the field conditions, without respect to the fact, that the conditions in the future might not remain the same. For the purpose of this study soil specimen were compacted and the optimum moisture content was identified. After compaction soil was tested at the dry side of optimum water content at w = 9 %, 10 % and 11 %. Parameters of shear strength were obtained and used for stability analysis with software GEOSLOPE/W 2012. According to referenced literature, it was expected for the shear strength of the soil to decrease with increasing water content. This hypothesis was not proven for clayey soil from Brno region. Development of values of friction angle and cohesion exhibited anomalous behaviour and such development was found also for values of Factor of safety (FOS) obtained from stability analyses. Results proved the necessity of taking moisture conditions into account, when processing stability analyses, in order to achieve reliable and safe constructions.

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INFLUENCE OF WATER CONTENT ON SHEAR STRENGTH OF FINE SOILS AT HOUEYOGBE IN BENIN

International Journal of Advanced Research ◽

10.21474/ijar01/11026 ◽

2020 ◽

Vol 8 (5) ◽

pp. 1104-1112

Author(s):

Koffi Judicael. Agbelele ◽

◽

Valery Doko ◽

Sena Peace Hounkpe ◽

Gerard Degan ◽

...

Keyword(s):

Shear Strength ◽

Water Content ◽

Influence Of Water

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Influence of water and rock particle contents on the shear behaviour of a SRM

Transportation Safety and Environment ◽

10.1093/tse/tdaa003 ◽

2020 ◽

Vol 2 (1) ◽

pp. 29-43

Author(s):

Longqi Liu ◽

Xuesong Mao ◽

Yajun Xiao ◽

Tiequan Wang ◽

Menglan Nie

Keyword(s):

Shear Strength ◽

Water Content ◽

Normal Stress ◽

Volumetric Strain ◽

Friction Angle ◽

Shear Behaviour ◽

Mountainous Area ◽

Particle Content ◽

Rock Particle ◽

Influence Of Water

Abstract The contents of both water and rock particles are important factors affecting the mechanical strength of a soil–rock mixture (SRM) filled subgrade in the western mountainous area of China. Therefore, the purpose of this paper is to study the mechanisms of reconstituted landslide deposit samples with different water and rock particle contents by analysing the characteristics of shear strength, volumetric strain and ‘jumping’ phenomenon via large-scale direct shear tests. The results show that the influence of water content on shear strength is greater than the influence of rock particle content under a lower normal stress, and the results are reversed in the case of a higher normal stress. The effect of water content on the equivalent cohesion is bigger, especially for the sample with a high rock particle content. The friction angle of the specimen with same water content increases with the increasing rock particle content, but when the number of rock particles increases to a certain extent, there is a little effect on the friction angle. However, the friction angle decreases with increasing water content at the same rock particle content. Specimens with the same rock particle content change from dilation to compression with increasing water content. Finally, the continuous stage of the ‘intense jumping’ at different water content has been analysed. The ‘jumping’ phenomenon of samples with low water and rock particle content will first strengthen and then weaken the samples with increasing normal stress.

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