Macro-Scale Direct Shear Test Device for Assessing Soil-Solid Interface Friction Under Low Effective Normal Stresses

2013 ◽  
Vol 37 (1) ◽  
pp. 20120217 ◽  
Author(s):  
Dharma Wijewickreme ◽  
Ruslan Amarasinghe ◽  
Hisham Eid
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Direct Shear ◽  
Normal Stresses ◽  
Test Device ◽  
Interface Friction ◽  
Solid Interface ◽  
Macro Scale

On the interface friction in direct shear test

2005 ◽  
Vol 32 (5) ◽  
pp. 317-325 ◽  
Author(s):  
S.H. Liu ◽  
De’an Sun ◽  
Hajime Matsuoka
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Direct Shear ◽  
Interface Friction

scholarly journals Effect of Different Stabilization Agent on Shear Behavior of Sand

2020 ◽  
Vol 8 (5) ◽  
pp. 3822-3825
Keyword(s):  
Shear Strength ◽  
Environmental Effect ◽  
Direct Shear Test ◽  
Shear Test ◽  
Friction Angle ◽  
Powder Form ◽  
Direct Shear ◽  
Normal Stresses ◽  
Failure Envelope ◽  
Sand Particles

Stabilisation of soils is one of the area that catch interest of many research. Making soil more stable and ready to resist again more loading are the reasons behind the applications. Recently usage of by-product in soils gained a momentum due to the positive environmental effect in terms of removing waste. In this research, three different stabilsation samples were prepared. The stabilization materials effect on the shear strength of sand were compared. The samples were properly blended and checked for homogeneity. All of the mixes apart from sand, had 10% of either flyash or fibre. In order to investigate the effect, direct shear test was used and run in different normal stresses (i.e.50 kPa,100 kPa,150 kPa). After running the direct shear test, the peak values of shear at failure was recorded relevant to each sample and normal stresses. Then the failure envelope plotted for each trial and the results of cohesion and friction angle were compare. The results showed that powder form of material were more effective due to their bonding forces with sand particles.

scholarly journals Influence of Structural Plane Microscopic Parameters on Direct Shear Strength

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yanhui Cheng ◽  
Weijun Yang ◽  
Dongliang He
Keyword(s):  
Particle Size ◽  
Shear Strength ◽  
Internal Friction ◽  
Direct Shear Test ◽  
Shear Test ◽  
Friction Angle ◽  
Internal Friction Angle ◽  
Direct Shear ◽  
Stiffness Ratio ◽  
Structural Plane

Structural plane is a key factor in controlling the stability of rock mass engineering. To study the influence of structural plane microscopic parameters on direct shear strength, this paper established the direct shear mechanical model of the structural plane by using the discrete element code PFC2D. From the mesoscopic perspective, the research on the direct shear test for structural plane has been conducted. The bonding strength and friction coefficient of the structural plane are investigated, and the effect of mesoscopic parameters on the shear mechanical behavior of the structural plane has been analyzed. The results show that the internal friction angle φ of the structural plane decreases with the increase of particle contact stiffness ratio. However, the change range of cohesion is small. The internal friction angle decreases first and then increases with the increase of parallel bond stiffness ratio. The influence of particle contact modulus EC on cohesion c is relatively small. The internal friction angle obtained by the direct shear test is larger than that obtained by the triaxial compression test. Parallel bond elastic modulus has a stronger impact on friction angle φ than that on cohesion c. Under the same normal stress conditions, the shear strength of the specimens increases with particle size. The shear strength of the specimen gradually decreases with the increase of the particle size ratio.

Soil Shear Strength Characteristic in Slope Disintegration Area

2013 ◽  
Vol 353-356 ◽  
pp. 735-739
Author(s):  
Xiao Ming Zhang ◽  
Shu Wen Ding ◽  
Shuang Xi Li
Keyword(s):  
Shear Strength ◽  
Direct Shear Test ◽  
Shear Test ◽  
Clay Content ◽  
Scientific Basis ◽  
Soil Mechanic ◽  
Direct Shear ◽  
Soil Cohesion ◽  
Soil Shear Strength ◽  
The Relationship

Development of slope disintegration is close to soil mechanic characteristics such as shear strength indices. Soil grain diameter and water content were tested. Soil direct shear test was conducted to analyze the relationship between shear strength indices and the influencing factors. The experimental data indicate that clay content and the range affect soil cohesion value and the scope. Soil cohesion increases with bulk density before 1.6g/cm3. But it decreases when the bulk after that. The results could provide a scientific basis for control of slope disintegration.

Bionic Concave Pit-Like Metal Surface and Soil Direct Shear Test

2012 ◽  
Vol 569 ◽  
pp. 451-454 ◽  
Author(s):  
Ya Ming Tang ◽  
Yang Tian
Keyword(s):  
Metal Surface ◽  
Shear Force ◽  
Smooth Surface ◽  
Direct Shear Test ◽  
Shear Test ◽  
Shear Displacement ◽  
Direct Shear ◽  
Typical Soil

In order to test the reducing adhesion and resistance effect of bionic metal non-smooth surface, the direct shear test is experimented on a kind of bionic dredging tools with typical soil and bionic concave pit-like metal surface.The relation of shear force and shear displacement on a certain pressure is presented. The result will help to design the structure of cutting soil tools’ surfaces with less adhesion and resistance.

Experimental investigation on concrete subjected to direct shear test

2021 ◽  
Author(s):  
P.R. Kalyana Chakravarthy ◽  
R. Rakesh ◽  
T. Kiran ◽  
S. Sivaganesan ◽  
A. Parthiban
Keyword(s):  
Experimental Investigation ◽  
Direct Shear Test ◽  
Shear Test ◽  
Direct Shear

Evaluasi Pengaruh Sifat Mikro-Fisik dan Bentuk Butiran terhadap Karakteristik Kuat Geser pada Pasir Vulkanik dan Pasir Pantai

2021 ◽  
Vol 1 (2) ◽  
pp. 584-597
Author(s):  
Chatherine Grace Maulina ◽  
◽  
Dian Sisinggih ◽  
Andre Primantyo Hendrawan ◽  
◽  
...  
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Direct Shear

Pasir merupakan salah satu bahan geoteknik yang memiliki peranan yang sangat penting, misalnya sebagai bahan timbunan urugan, timbunan backfill di belakang dinding penahan, maupun bahan filter. Pasir berasal dari berbagai sumber dan proses geologi yang berbeda, sehingga pasir vulkanik dan pasir pantai akan memiliki karakteristik fisik, mineralogi, dan bentuk butiran yang berbeda pula. Penelitian ini melakukan serangkaian uji di laboratorium dengan benda uji berupa material pasir: (1) pasir vulkanik sungai aliran lahar dari hasil erupsi Gunung Kelud di Kali Putih Blitar, (2) pasir pantai dari beberapa pantai di Kabupaten Malang yaitu Pantai Wonogoro, Pantai Jolangkung, dan Pantai Goa Cina. Aspek bentuk butiran meliputi roundness, sphericity, dan tekstur. Analisis pengujian dari SEM dan X-RD untuk menentukan karakteristik mikro-fisik dan bentuk butiran pasir secara mendetail. Pengujian geser langsung (direct shear test) untuk menentukan kuat geser dari tanah pasir. Pasir vulkanik memiliki permukaan butiran yang lebih kasar dari pasir pantai sehingga sudut geser dalam yang didapatkan lebih besar dari sampel pasir pantai. Karena tanah pasir tidak memiliki kohesi maka kekuatannya hanya pada sudut geser dalam; dengan demikian, pengaruh aspek mikro-fisik dan bentuk butiran pasir terhadap karakteristik kuat gesernya harus diperhitungkan untuk aplikasinya sebagai material geoteknik.

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