Comparison of soil strength data obtained in situ with penetrometer and with vane shear test

2006 ◽  
Vol 87 (1) ◽  
pp. 112-118 ◽  
Author(s):  
J. Bachmann ◽  
K. Contreras ◽  
K.H. Hartge ◽  
R. MacDonald
Keyword(s):  
Shear Test ◽  
Soil Strength ◽  
Strength Data ◽  
Vane Shear Test

Discrete element model calibration based on in situ measurements

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Istvan Keppler ◽  
Adrienn Bablena ◽  
Nihal D. Salman ◽  
Péter Kiss
Keyword(s):  
Model Calibration ◽  
Design Methodology ◽  
Shear Test ◽  
Element Model ◽  
Discrete Element ◽  
Discrete Element Model ◽  
Content Type ◽  
Vane Shear Test ◽  
Using Data

PurposeTransportation of the measurement samples from their original place to the measurement site causes significant changes in their mechanical properties. The possibility of making in situ measurements helps to create more precise discrete element models.Design/methodology/approachThe possibility of using in situ modified vane shear test based measurement for the calibration of discrete element models is demonstrated in this work.FindingsThe advantage of employing the adjusted vane test is that the values of in situ measurements can be used for the calibration.Originality/valueThe procedure we present allows us to perform accurate discrete element calibration using data from on-site measurements that can be performed quickly and easily.

scholarly journals In Situ Shear Test for Revealing the Mechanical Properties of the Gravelly Slip Zone Soil

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6531 ◽  
Author(s):  
Zongxing Zou ◽  
Qi Zhang ◽  
Chengren Xiong ◽  
Huiming Tang ◽  
Lei Fan ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Plastic Deformation ◽  
Shear Test ◽  
Slip Zone ◽  
Three Gorges Reservoir Area ◽  
Silty Clay ◽  
Sigmoid Function ◽  
In Situ Test ◽  
Deformation Stage

Slip zone soil is usually composed of clay or silty clay; in some special geological environments, it contains gravels, which make the properties of the slip zone soil more complex. Unfortunately, in many indoor shear tests, gravels are removed to meet the demands of apparatus size, and the in situ mechanical property of the gravelly slip zone soil is rarely studied. In this study, the shear mechanical property of the gravelly slip zone soil of Huangtupo landslide in the Three Gorges Reservoir area of China was investigated by the in situ shear test. The test results show that the shear deformation process of the gravelly slip zone soil includes an elastic deformation stage, elastic–plastic deformation stage, and plastic deformation stage. Four functions were introduced to express the shear constitutive model of the gravelly slip zone soil, and the asymmetric sigmoid function was demonstrated to be the optimum one to describe the relationship of the shear stress and shear displacement with a correlation coefficient of 0.986. The comparison between the in situ test and indoor direct shear test indicates that gravels increase the strength of the slip zone soil. Therefore, the shear strength parameters of the gravelly slip zone soil obtained by the in situ test are more preferable for evaluating the stability of the landslide and designing the anti-slide structures.

Profile Soil Property Estimation Using a VIS-NIR-EC-Force Probe

2017 ◽  
Vol 60 (3) ◽  
pp. 683-692 ◽  
Author(s):  
Yongjin Cho ◽  
Kenneth A. Sudduth ◽  
Scott T. Drummond
Keyword(s):  
Soil Properties ◽  
Water Content ◽  
Bulk Density ◽  
Soil Property ◽  
Soil Strength ◽  
Reflectance Spectra ◽  
Land Resource ◽  
Strength Data ◽  
Soil Sensors ◽  
Combining Data

Abstract. Combining data collected in-field from multiple soil sensors has the potential to improve the efficiency and accuracy of soil property estimates. Optical diffuse reflectance spectroscopy (DRS) has been used to estimate many important soil properties, such as soil carbon, water content, and texture. Other common soil sensors include penetrometers that measure soil strength and apparent electrical conductivity (ECa) sensors. Previous field research has related these sensor measurements to soil properties such as bulk density, water content, and texture. A commercial instrument that can simultaneously collect reflectance spectra, ECa, and soil strength data is now available. The objective of this research was to relate laboratory-measured soil properties, including bulk density (BD), total organic carbon (TOC), water content (WC), and texture fractions to sensor data from this instrument. At four field sites in mid-Missouri, profile sensor measurements were obtained to 0.9 m depth, followed by collection of soil cores at each site for laboratory measurements. Using only DRS data, BD, TOC, and WC were not well-estimated (R2 = 0.32, 0.67, and 0.40, respectively). Adding ECa and soil strength data provided only a slight improvement in WC estimation (R2 = 0.47) and little to no improvement in BD and TOC estimation. When data were analyzed separately by major land resource area (MLRA), fusion of data from all sensors improved soil texture fraction estimates. The largest improvement compared to reflectance alone was for MLRA 115B, where estimation errors for the various soil properties were reduced by approximately 14% to 26%. This study showed promise for in-field sensor measurement of some soil properties. Additional field data collection and model development are needed for those soil properties for which a combination of data from multiple sensors is required. Keywords: NIR spectroscopy, Precision agriculture, Reflectance spectra, Soil properties, Soil sensing.

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 Determination of Soil Strength Using 2D Geoelectric Methods and Direct Shear Test (Case Study in Istana Tidar Regency Housing – Jember)

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Nurul Priyantari ◽  
Supriyadi . ◽  
Devi Putri Sulistiani ◽  
Winda Aprita Mayasari
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Resistivity Measurement ◽  
Soil Strength ◽  
Test Case ◽  
Cohesive Soils ◽  
Direct Shear ◽  
Geoelectrical Resistivity

2D geoelectrical resitivity measurement and direct shear test has been conducted to determine soil type and soil strength on land settlement Istana Tidar Regency housing, Jember. Resistivity measurement is conducted at two line that have latitude 08.10’102” – 08.10’108” S, 113.43’404” – 113.43’408” E (line 1) dan 08.10’102” – 08.10’108” S, 113.43’410” – 113.43’414” E (line 2). Soil specimen were taken at 3 point, 2 point at line 1 and 1 point at line 2. Based on result of 2D geoelectrical resistivity measurement and direct shear test, this location was dominated by clay, silt and sandy silt are included in the type of cohesive soils. Soil strength of this type is capable to support light bulding contruction one or two floors.

Closure to “In-Situ Shear Test for Rock Fills”

1976 ◽  
Vol 102 (5) ◽  
pp. 565-569
Author(s):  
Surendra P. Jain ◽  
Ramesh C. Gupta
Keyword(s):  
Shear Test
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