Vane Shear Test Apparatus: A Reliable Tool for the Soft Soil Exploration

2009 ◽  
pp. 277-277-13
Author(s):  
PK Nagarkar ◽  
SV Rode ◽  
TW Shurpal ◽  
GL Dixit
Keyword(s):  
Shear Test ◽  
Soft Soil ◽  
Test Apparatus ◽  
Reliable Tool ◽  
Vane Shear Test ◽  
Soil Exploration

scholarly journals STUDI PENINGKATAN KARAKTERISTIK TANAH LEMPUNG DENGAN SERAT TANDAN KOSONG KELAPA SAWIT

2018 ◽  
Vol 7 (02) ◽  
pp. 97-103
Author(s):  
Misnawati Misnawati
Keyword(s):  
Shear Test ◽  
Vane Shear Test

Stabilisasi tanah dimaksudkan untuk memperbaiki sifat-sifat tanah asli dengan cara antara lain menambahkan suatu bahan tertentu yang mengakibatkan perubahan sifat-sifat tanah asli. Selama ini penggunanaan serat tandan kosong banyak dihasilkan oleh industri perkebunan kelapa sawit. Serat merupakan jumlah terbesar ketiga setelah CPO dan tandan kosong kelapa sawit, tandan buah segar diperkirakan mengandung 14 - 15%. Serat dapat dimanfaatkan sebagai bahan bakar alternatif energi pembangkit listrik, pembuatan kertas dan sebagai bahan campuran makanan ternak. Tapi sekarang serat juga digunakan untuk material konstruksi. Penelitian ini dilakukan untuk menyelidiki prosentase optimum serat untuk mendapatkan kepadatan maksimum, menganalisis peningkatan nilai CBR tanah setelah penambahan serat, menganalisis peningkatan nilai qu pada pengujian UCT tanah setelah penambahan serat, menganalisis peningkatan nilai su pada pengujian vane shear test tanah setelah penambahan serat. Penelitian dilakukan dengan mencampurkan serat tandan kosong kelapa sawit dengan tanah lempung lunak dengan kadar serat masing-masing 5%, 6%, 7%, dan 8%. Hasil pencampuran diharapkan dapat diketahui nilai bagaimana hubungan dari berbagai variasi prosen penambahan serat tandan kosong kelapa sawit guna mendapatkan tujuan yang diharapkan, selain itu hasil yang diperoleh diharapkan dapat memperbaiki kualitas tanah menjadi lebih baik. Berdasarkan hasil analisis dari penelitian ini, bahwa adanya penambahan serat tandan kosong kelapa sawit di dalam tanah lunak maka dapat memperbaiki kekuatan tanah tersebut sehingga menjadi meningkat dan hasil penelitian ini dapat digunakan sebagai acuan untuk stabilisasi tanah lempung.

scholarly journals Determining the Shear Strength Properties of a Soil-geogrid Interface Using a Large-scale Direct Shear Test Apparatus

2020 ◽  
Author(s):  
Jakub Stacho ◽  
Monika Sulovska ◽  
Ivan Slavik
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Large Scale ◽  
Direct Shear Test ◽  
Shear Test ◽  
Strength Properties ◽  
Coarse Grained ◽  
Direct Shear ◽  
Test Apparatus ◽  
Fine Gravel

The paper deals with the laboratory testing of coarse-grained soils that are reinforced using a geogrid. The shear strength properties were determined using a large-scale direct shear test apparatus. The tests were executed on original as well as on reinforced soil, when the geogrid was placed on a sliding surface, which permitted determining the shear strength properties of the soil-geogrid interface. The aim of the tests was to determine the interface shear strength coefficient α, which represents the ratio of the shear strength of the soil-geogrid interface to the unreinforced soil. The tests were executed on 3 samples of coarse-grained materials, i.e., poorly graded sand, poorly graded fine gravel and poorly graded medium gravel. Two types of geogrids were tested, i.e., a woven polyester geogrid and a stiff polypropylene geogrid. The results of the laboratory tests on the medium gravel showed that the reduction coefficient α reached higher values in the case of the stiff polypropylene geogrid. In the cases of the fine gravel and sand, the values of the interface coefficient α were similar to each other. The shear strength of the interface was reduced or was similar to the shear strength of unreinforced soil in a peak shear stress state, but significantly increased with horizontal deformations, especially for the fine gravel and sand. The largest value of the coefficient α was measured in the critical shear stress state. Based on the results of the testing, a correlation which allows for determining the optimal grain size distribution was obtained.

Characterisation of nano magnesia–cement-reinforced seashore soft soil by direct-shear test

2019 ◽  
Vol 37 (8) ◽  
pp. 989-998 ◽  
Author(s):  
Wei Wang ◽  
Chen Zhang ◽  
Na Li ◽  
Feifei Tao ◽  
Kai Yao
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Soft Soil ◽  
Direct Shear

scholarly journals Interpretation of Shear mode on Vane Shear test by X-ray CT Scan

2017 ◽  
Vol 12 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Shunzo KAWAJIRI ◽  
Masanori TANAKA ◽  
Takayuki KAWAGUCHI ◽  
Yukiko NAOHARA ◽  
Hiroshi HIRABAYASHI ◽  
...  
Keyword(s):  
Ct Scan ◽  
Shear Test ◽  
Shear Mode ◽  
X Ray ◽  
Vane Shear Test

The Effect of Heat Induction on Shear Strength of Soft Soil in Radial Zone

2020 ◽  
Vol 998 ◽  
pp. 329-334
Author(s):  
Maraden Panjaitan ◽  
Lawalenna Samang ◽  
Achmad Bakri Muhiddin ◽  
Tri Harianto
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Soft Soil ◽  
Soft Clay ◽  
Experimental Result ◽  
Small Scale ◽  
Infrastructure Development ◽  
Heat Induction ◽  
Vane Shear Test ◽  
Radial Zone

The main problem in infrastructure development at the soft clay was its bearing capacity therefore it needs to be improved. In this research, the improvement method was carried out by modeling in small scale of preloading and heat induction combination. Location of soft clay sampling was in Takalar, Indonesia. The purpose of this study was to investigate the change of the shear strength of soft soil corresponding with heat induction at the radial zone. The shear strength was obtained by vane shear test and compressive strength from unconfined compressive test (UCT). The heat applied ranging from 100o C, 200o C, 300o C, and 400o C with static preloading load 0.20 kg/cm2. The strengths of the soil in radial zones have been tested at R0, R1, and R2. At lowest temperature 100° at R0 the compressive strength was 0.203 kg/cm2, at highest temperature 400° at R0 the compressive strength 0.467 kg/cm2, there was a significant increasing of compressive strength value with the change of temperature. At the highest temperature 4000 the shear strength from vane shear tests resulting at R0 0.240 kg/cm2, R1 of 0.128 kg/cm2, R2 of 0.077 kg/cm2. At the lowest temperature of 100o C shows R0 at 0.116 kg/cm2, R1 at 0.070 kg/cm2, R3 of 0.046 kg/cm2. The results show a tendency of declining strength value as the soil farther away from center of heat induction. The experimental result from this model produces strength that can be used as a parameter of the foundation model on soft soil.

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