Study on In Situ Shearing Strength Test for the Retaining Wall Bottom in a Bank Revetment Project

2012 ◽  
Vol 214 ◽  
pp. 333-337
Author(s):  
Guang Zhang ◽  
Jun Rong Ma ◽  
Jing Xi Chen ◽  
Hua Lin Zhou ◽  
Dong Hua Wang
Keyword(s):  
Shear Strength ◽  
Retaining Wall ◽  
Friction Angle ◽  
Strength Test ◽  
Composite Foundation ◽  
Undisturbed Soil ◽  
Shear Strength Test ◽  
Geological Conditions ◽  
Shearing Strength

To obtain the necessary shear strength parameters of the retaining wall bottom in a bank revetment project, in-situ shearing strength test must be conducted. There are 3 kinds of foundations. One is undisturbed soil foundation, and the other two are composite foundations. Due to the limited of the engineering conditions, each kind of foundation has prepared one specimen only. So the single shearing strength test can't separate cohesion c and friction angle φ. To solve this problem, a method which is a combination of shear strength test and sliding strength test is used. Sliding strength test is carried on specimens that have already failed after shearing strength test. This test is carried in wet conditions and cohesion values and friction angle values are obtained. In addition, the influence of the processing of composite foundation to equivalent friction coefficient is analyzed. Test result can be referenced by bank revetment projects which have similar geological conditions.

Experimental Study of the Shear Strength of Cobalt-Rich Crusts

2013 ◽  
Vol 419 ◽  
pp. 576-580 ◽  
Author(s):  
Hong Yun Wu ◽  
Zheng Chen
Keyword(s):  
Experimental Study ◽  
Shear Strength ◽  
Internal Friction ◽  
Empirical Formula ◽  
Laboratory Testing ◽  
Friction Angle ◽  
Strength Test ◽  
Strength Parameter ◽  
Shearing Strength

The shear strength parameter of cobalt-rich crusts can be used to design cobalt-rich crusts mining head. The shearing test of cobalt-rich crusts sample was done with different angle shearing testing apparatus.Firstly, the cobalt-rich crusts sample with the size of 50mmx50mmx50mm cube was clamped in the variable angle plate.Secondly, the sample ware loaded till to be damaged. Lastly,the damaged load were recorded at the degree of 50, 60 and 70 to establish their shearing strength and normal stress empirical formula.According to the testing result, its cohesion and internal friction angle parameters are respectively 0.275MPa and 54.43 degree. Restricted by the number of samples and limited by laboratory testing,in-situ shearing strength test should be carried out to improve the proposed empirical formula.

scholarly journals Direct Shear Strength of Clay Reinforced with Coir Fiber

UKaRsT ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 151
Author(s):  
Anita Widianti ◽  
Willis Diana ◽  
Maratul Hasana
Keyword(s):  
Shear Strength ◽  
Dry Weight ◽  
Friction Angle ◽  
Strength Test ◽  
Fiber Content ◽  
High Plasticity ◽  
Coir Fiber ◽  
Direct Shear ◽  
Maximum Increase ◽  
Shear Strength Test

Indonesia is the largest coconut producing country in the world. However, the resulting coir waste is still rarely used for structural materials. This research studied the effect of random inclusion of coir fiber on the shear strength of clay with high plasticity. The carried test in this study is a direct shear strength test. The fiber content variations used are 0%, 0.25%, 0.50%, 0.75%, and 1% of the dry weight of the mixture with a fiber length of between 30 mm to 50 mm. The results show that the reinforcement of coir fiber can increase the cohesion and friction angle. The maximum increase in cohesion value was obtained at fiber content of 0.75%, which was 39.66%. The increase in the value of the friction angle was obtained at 1% fiber content, which was 46.67%. The optimum coir fiber content was achieved at the fiber content of 0.75%. With this content, the value of the shear strength reaches its maximum with an increase of 39.4% at a normal stress of 8.071 kPa.

scholarly journals Influence of the Diatomite Specie on the Peak and Residual Shear Strength of the Fine-Grained Soil

2021 ◽  
Vol 11 (4) ◽  
pp. 1352
Author(s):  
Carlos J. Slebi-Acevedo ◽  
Daniel A. Zuluaga-Astudillo ◽  
Juan C. Ruge ◽  
Daniel Castro-Fresno
Keyword(s):  
Shear Strength ◽  
Physical And Mechanical Properties ◽  
Friction Angle ◽  
Shear Resistance ◽  
Strength Test ◽  
Residual Shear Strength ◽  
Shear Strength Test ◽  
Fine Grained ◽  
Fine Grained Soil ◽  
Mexican Species

Diatomite is a powdering mineral mainly composed of diatom microfossils present in marine and lacustrine soils, which influences their physical and mechanical properties. Although many articles have been found in the literature concerning the influence of diatomite in the overall behavior of natural soils, few research efforts have been carried out to evaluate the influence of the diatom microfossil species on their shear resistance. Therefore, in this research, the influence of the diatomite species and the content in the peak and the residual shear strength of diatomite-fine grained soil mixtures was analyzed using the annular shear strength test. Scanning electron microscopy (SEM) and Atterberg limits were also carried out as additional tests to explain the interlocking effect between the microfossils and the soil. Overall, both diatomite species increased both peak and residual shear strength of the soil similar to dense sands. Nevertheless, the Mexican species reveal higher friction angle values compared with Colombian species.

Direct shear strength test on rocks along discontinuities, under laboratory conditions

2014 ◽  
Vol 9 (3) ◽  
pp. 139-150 ◽  
Author(s):  
Ildikó Buocz ◽  
Nikoletta Rozgonyi-Boissinot ◽  
Ákos Török ◽  
Péter Görög
Keyword(s):  
Shear Strength ◽  
Strength Test ◽  
Direct Shear ◽  
Shear Strength Test ◽  
Laboratory Conditions

scholarly journals Levee reliability analyses for various flood return periods – a case study in southern Taiwan

2015 ◽  
Vol 15 (4) ◽  
pp. 919-930 ◽  
Author(s):  
W.-C. Huang ◽  
H.-W. Yu ◽  
M.-C. Weng
Keyword(s):  
Water Level ◽  
Cross Sections ◽  
Retaining Wall ◽  
Failure Mechanisms ◽  
Friction Angle ◽  
Return Periods ◽  
Scouring Depth ◽  
Southern Taiwan ◽  
Potential Failure

Abstract. In recent years, heavy rainfall conditions have caused disasters around the world. To prevent losses by floods, levees have often been constructed in inundation-prone areas. This study performed reliability analyses for the Chiuliao First Levee in southern Taiwan. The failure-related parameters were the water level, the scouring depth, and the in situ friction angle. Three major failure mechanisms were considered: the slope sliding failure of the levee and the sliding and overturning failures of the retaining wall. When the variability of the in situ friction angle and the scouring depth are considered for various flood return periods, the variations of the factor of safety for the different failure mechanisms show that the retaining wall sliding and overturning failures are more sensitive to the change of the friction angle. When the flood return period is greater than 2 years, the levee could fail with slope sliding for all values of the water level difference. The results of levee stability analysis considering the variability of different parameters could aid engineers in designing the levee cross sections, especially with potential failure mechanisms in mind.

Design Method of Long-Short-Pile Composite Foundation Base on Tangent Modulus In Situ Loading Test Curve

2011 ◽  
Vol 243-249 ◽  
pp. 2314-2323 ◽  
Author(s):  
Peng Liu ◽  
Guang Hua Yang ◽  
Yu Cheng Zhang
Keyword(s):  
Design Method ◽  
Composite Foundation ◽  
Tangent Modulus ◽  
Loading Test ◽  
Undisturbed Soil ◽  
Foundation Base ◽  
Modulus Method ◽  
S Curve ◽  
Deformation Compatibility

The settlement of each part of the composite foundation, such as the foundation mat, cushion, soils and pile head, is recognized as equivalent under normal working conditions. On the basis of this, the corresponding load on long-short pile and soils can be derived easily from each individual p-s curve. The p-s curve of the composite foundation can be pictured in terms of the mutual actions of all the components mentioned above. and thus the corresponding settlement with load will be determined. Meanwhile, the p-s curve can be obtained via the undisturbed soil hyperbola tangent modulus method, which not only characters the nonlinear relationship between load and settlement very well, but also shows the deformation compatibility among those components. It is found that designed bearing capacity of soil is much higher than the reality based on usual design norms of composite foundation, while pile load is greater than the designed ones, which can be credited to the deformation compatibility of pile-soil not considered.

Interpretation of cone penetration tests. Part II: Clay

1983 ◽  
Vol 20 (4) ◽  
pp. 734-745 ◽  
Author(s):  
P. K. Robertson ◽  
R. G. Campanella
Keyword(s):  
Shear Strength ◽  
Friction Angle ◽  
Companion Paper ◽  
Deformation Characteristics ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Cone Penetration Testing ◽  
Personal Experiences ◽  
Penetration Tests

This paper is the second of two parts and presents a summarized work guide for practicing engineers for interpretation of parameters for undrained conditions during the cone penetration test such as, undrained shear strength, overconsolidation ratio, and deformation characteristics of clay. The advantages, use, and interpretation of the piezometer cone are also discussed. Factors that influence the interpretations are discussed and guidelines provided. The companion paper, Part I: Sand, considers drained conditions during the test and summarizes interpretation of parameters such as relative density, friction angle, and deformation characteristics of sand. The authors' personal experiences and current recommendations are included. Keywords: static cone penetration testing, in-situ, interpretation, shear strength, modulus, stress history, pore pressures, permeability, consolidation.

Research on the Package of High Voltage SiC JBS

2015 ◽  
Vol 713-715 ◽  
pp. 1038-1041
Author(s):  
Gang Chen ◽  
Ya Nan Li ◽  
Lin Wang ◽  
Ao Liu ◽  
Song Bai ◽  
...  
Keyword(s):  
Shear Strength ◽  
High Voltage ◽  
Wire Bonding ◽  
Strength Test ◽  
Strength Measurement ◽  
Shear Strength Test ◽  
Materials Used

According to the application of the high voltage SiC devices, studying the package of three kinds of SiC dies with different metals. Experiments show that all die wire bonding and shear strength measurement up to standard, and provide three kinds of packages for different applications, at the same time, filling the needs of producing. The purpose of the shear strength test is to determine the integrity of materials used to attach SiC die to package substrates.

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