scholarly journals THE RESULTS OF CORELATION BETWEEN CONE TIP RESISTANCE, PUSH-IN PRESSURE LOAD CELLS AND A COMPRESSION DEVICE / KŪGINIO STIPRIO IR GILIOJO SPRAUSTINIO PAMATO PAGRINDO LAIKOMOSIOS GALIOS BANDYMU, TAIP PAT KITAIS METODAIS NUSTATYTŲ DEFORMACIJŲ MODULIŲ PRIKLAU

2013 ◽  
Vol 5 (5) ◽  
pp. 525-529 ◽  
Author(s):  
Tautvydas Statkus ◽  
Vaidas Martinkus
Keyword(s):  
Field Tests ◽  
Cohesionless Soil ◽  
Soil Deformation ◽  
Regression Analyses ◽  
Deep Foundation ◽  
Compression Device ◽  
Cone Tip Resistance ◽  
Tip Resistance ◽  
Load Cells ◽  
Properties Of Soil

The article is aimed at identifying the correlation between soilcone resistance and soil deformation modules determined referringto the results of tested data on deep foundation bearingcapacity, the push-in pressure cell and the use of an oedometer.Physical and mechanical properties of soil have been determinedconducting laboratory and field tests. After regression analyses,the correlation between cone resistance and different kinds ofsoil deformation modules have been given. The results of theexperimental study can be used for predicting a practical approachto deep foundation in cohesionless soil. Santrauka Šio straipsnio tikslas yra nustatyti priklausomybes tarp grunto kūginio stiprio ir grunto deformacijų modulių, gautų iš giliojo pamato pagrindo laikomosios galios bandymų duomenų, taip pat grunto tyrimo įspraudžiamaisiais horizontaliojo slėgio matuokliais bei kompresiniu aparatu. Straipsnyje pateiktos tiriamojo orasausio smėlinio grunto fizinės ir mechaninės savybės nustatytos laboratoriniais ir lauko tyrimo metodais. Atlikus regresinę bandymų duomenų analizę straipsnio išvadose pateiktos minėtų dydžių priklausomybės. Tyrimo duomenys gali būti panaudoti sudarant praktinį metodą giliųjų spraustinių pamatų smėlinių pagrindų nuosėdžiams prognozuoti.

Observations on the development of pore-water stresses during piezocone penetration in clays

1990 ◽  
Vol 27 (4) ◽  
pp. 418-428 ◽  
Author(s):  
Paul W. Mayne ◽  
Fred H. Kulhawy ◽  
J. Neil Kay
Keyword(s):  
Water Stress ◽  
Pore Water ◽  
Field Tests ◽  
In Situ Tests ◽  
Stress Effects ◽  
Cone Tip Resistance ◽  
Clay Deposits ◽  
Tip Resistance ◽  
Porous Element ◽  
Penetration Tests

Piezocone data from 83 clay sites are reviewed to investigate first-order trends between measured penetration pore-water stresses (ut and ubt) and corrected cone-tip resistance (qT). It is shown that the presence of fissures in clay deposits and of fissured crusts significantly affects the pore water stress response. Commercially available piezocones primarily favor the location of the porous element either (1) on the cone tip or face (ut) or (2) just behind the tip (ubt). The former (ut) provides optimal profiling while the latter (ubt) is required for correcting measured cone-tip resistances for pore-water stress effects acting on unequal areas of the cone. The available data indicate that qT predominantly reflects penetration pore-water stresses (ut) with measured ratios of ut/qT on the cone face averaging in the order of 0.73 for most intact clays, 0.64 specifically for Leda clays, and 0.46 for fissured clays. Behind the cone tip, the ratio of ubt/qT averages about 0.53 for intact clays, 0.58 specifically for Leda clays, and near zero or slightly negative for heavily overconsolidated fissured clays. Key words: clays, cone penetrometers, field tests, fissuring, in situ tests, penetration tests, piezocones, pore-water stresses.

Analysis of Soil Liquefaction Potential through Three Field Tests-Based Methods: A Case Study of Babol City

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
Ali Hasanzadeh ◽  
◽  
Sadegh Rezaei ◽  
Issa Shooshpasha ◽  
Yasser Ebrahimian Ghajary ◽  
...  
Keyword(s):  
Field Tests ◽  
Earthquake Hazard ◽  
Soil Liquefaction ◽  
Unit Weight ◽  
Liquefaction Potential ◽  
Ground Failure ◽  
Cone Tip Resistance ◽  
Tip Resistance ◽  
Seismic Area ◽  
Liquefaction Assessment

During earthquakes, ground failure is commonly caused by liquefaction. Thus, assessment of soil liquefaction potential in earthquake-prone regions is a crucial step towards reducing earthquake hazard. Since Babol city in Iran country is located in a high seismic area, estimation of soil liquefaction potential is of great importance in this city. For this purpose, in the present research, using field-based methods and geotechnical data (such as unit weight of soil, relative density, SPT number, shear wave velocity and cone tip resistance) of 60 available boreholes in Babol, three liquefaction maps were provided. Finally, one comprehensive liquefaction map was presented for soil of Babol city. The obtained results in this paper are well in line with the previous investigations. Based on the results, the factor of safety in 45% of the study area is less than one (liquefaction occurrence). In addition, the results indicate that since each field-based method requires particular data, applying various field tests is necessary for a more accurate liquefaction assessment.

Evaluation on Features of Soft Foundation Engineering and Bearing Layer of Pile in Jiaxing City

2011 ◽  
Vol 90-93 ◽  
pp. 217-221
Author(s):  
Jin Long Zhou ◽  
Qiao Li ◽  
Wei Zhong Cai
Keyword(s):  
Soil Mass ◽  
Shallow Foundation ◽  
Silty Clay ◽  
Foundation Engineering ◽  
Foundation Soil ◽  
Cone Tip Resistance ◽  
Soft Foundation ◽  
Tip Resistance ◽  
Bearing Layer

Through the investigation into composition of major shallow foundation soil mass and the correlation of mechanical indicators in this study, the regression equation of mechanical indicators of the features of local foundation soil mass and the data of in situ testing was obtained. Based on massive quantities of exploration materials, this study analyzed engineering features, distribution status, and the feasibility of silty clay to be used as the bearing layer of the pile in Layer ④2 . The analytical results showed that the silty clay with the uniform depth of over 3.5m and the cone tip resistance in static sounding of over 400MPa could be used as bearing layer of the pile. This study could provide the reference for the accurate understanding of the engineering features of soil mass, and the design and evaluation of foundation in Jiaxing City.

Computerized Cone Penetration Test for Soil Classification

2008 ◽  
Vol 2053 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Murad Y. Abu-Farsakh ◽  
Zhongjie Zhang ◽  
Mehmet Tumay ◽  
Mark Morvant
Keyword(s):  
Classification System ◽  
Soil Classification ◽  
Cone Penetration Test ◽  
Classification Systems ◽  
Fuzzy Classification ◽  
Classification Methods ◽  
Penetration Test ◽  
Cone Penetration ◽  
Cone Tip Resistance ◽  
Tip Resistance

Computerized MS-Windows Visual Basic software of a cone penetration test (CPT) for soil classification was developed as part of an extensive effort to facilitate the implementation of CPT technology in many geotechnical engineering applications. Five CPT soil engineering classification systems were implemented as a handy, user-friendly, software tool for geotechnical engineers. In the probabilistic region estimation and fuzzy classification methods, a conformal transformation is first applied to determine the profile of soil classification index (U) with depth from cone tip resistance (qc) and friction ratio (Rf). A statistical correlation was established in the probabilistic region estimation method between the U index and the compositional soil type given by the Unified Soil Classification System. Conversely, the CPT fuzzy classification emphasizes the certainty of soil behavior. The Schmertmann and Douglas and Olsen methods provide soil classification charts based on cone tip resistance and friction ratio. However, Robertson et al. proposed a three-dimensional classification system that is presented in two charts: one chart uses corrected tip resistance (qt) and friction ratio (Rf); the other chart uses qt and pore pressure parameter (Bq) as input data. Five sites in Louisiana were selected for this study. For each site, CPT tests and the corresponding soil boring results were correlated. The soil classification results obtained using the five different CPT soil classification methods were compared.

scholarly journals The Boring Sounding of Alluvial Soils

2016 ◽  
Author(s):  
Gennadii Boldyrev ◽  
Gennadii Novichkov
Keyword(s):  
Axial Force ◽  
Rotation Speed ◽  
Linear Velocity ◽  
Alluvial Soils ◽  
Soil Deformation ◽  
In Situ Test ◽  
Drilling Parameters ◽  
Tip Resistance ◽  
Deformation Properties

In article the description and results of in situ test of soils is resulted by of Russian drilling test (RDT). It involves several drilling parameters: torque, axial force, rotation speed, linear velocity, tip resistance for identifying soil strata of different strengths and for determining dependences between drilling parameters and soil deformation properties.

Traction-Soil Compaction Tradeoffs as a Function of Dynamic Soil-Tire Interation Due to Varying Soil and Loading Conditions

1995 ◽  
Author(s):  
Shrini Upadhyaya ◽  
Dan Wolf ◽  
William J. Chancellor ◽  
Itzhak Shmulevich ◽  
Amos Hadas
Keyword(s):  
Prediction Model ◽  
Soil Compaction ◽  
Field Tests ◽  
Prediction Equation ◽  
Engineering Properties ◽  
Solution Technique ◽  
Strain Rate Effects ◽  
Disturbed Soil ◽  
Properties Of Soil

The objectives of this study were to investigate soil-pneumatic tire interaction and develop traction-soil compaction prediction model. We have developed an inverse solution technique that employs a response surface methodology to determine engineering properties of soil in-situ. This technique is useful in obtaining actual properties of soil in-situ for use in traction and soil compaction studies rather than using the values obtained in the laboratory by employing remolded and/or disturbed soil samples. We have conducted extensive field tests i the U.S. to develop semi-empirical traction prediction equation for radial ply tires. A user friendly traction-soil compaction program was developed to predict tractive ability of radial ply tires using several different techniques and to estimate soil compaction induced by these tires. A traction prediction model that incorporates strain rate effects on the tractive ability of tires was developed in Israel. A mobile single wheel tester and an in-situ soil test device were developed i Israel to significantly enhance the ability of Israeli investigators to conduct traction-soil compaction research. This project has resulted in close cooperation between UCD, Technion, and ARO, which will be instrumental in future collaboration.

scholarly journals Analysis of the Physicochemical and Mineralogical Properties of the Materials Used in the Preparation of Recoblocks

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3626
Author(s):  
María Neftalí Rojas-Valencia ◽  
José Alberto Lopez-López ◽  
Denise Yeazul Fernández-Rojas ◽  
José Manuel Gómez-Soberón ◽  
Mabel Vaca-Mier
Keyword(s):  
Field Tests ◽  
Construction Sector ◽  
X Ray Diffraction ◽  
Construction Waste ◽  
Mineralogical Properties ◽  
Bending Resistance ◽  
Resistance To Stress ◽  
Materials Used ◽  
Physical And Chemical ◽  
Properties Of Soil

The construction sector generates 14,000 t/d of construction waste in Mexico City, these materials do not have real applications and end up accumulating in landfills. This work, the objective of which was to analyze the physicochemical and mineralogical properties of soil and construction waste used in the manufacture of Recoblocks, is divided in five stages. First, the excavation material was submitted to field tests. Physical and chemical tests were then carried out on construction waste. Subsequently, the optimal mixture for making Recoblocks was determined. Next, Recoblocks were evaluated and compared with blocks made with water only, without mucilage of Opuntia ficus, and finally a feasibility study was performed. The X-ray diffraction study showed the presence of plagioclase, minerals that improve bending resistance, hardness, durability, as well as resistance to stress in a material. Compared to blocks manufactured without mucilage, the use of Opuntia ficus mucilage increased the compressive strength of the material by 59%, as well as the erodibility. Recoblocks are an environmentally friendly option because they are based on recycled materials, dried under the sun, which eliminates the use of brick oven. The production cost per unit is just USD 0.19, so it is a viable option as a building material.

Comparison of Measured and Back Estimated Cone Penetration Resistance of Sand

2008 ◽  
Author(s):  
Meen-Wah Gui ◽  
Dong-Sheng Jeng
Keyword(s):  
Penetration Resistance ◽  
Cavity Expansion ◽  
Cone Penetration ◽  
Cone Penetration Tests ◽  
Cone Tip Resistance ◽  
Tip Resistance ◽  
Cone Penetration Resistance ◽  
Expansion Theory ◽  
Cavity Expansion Theory ◽  
Penetration Tests

The application of cavity expansion theory in the back estimation of cone penetration tests conducted in calibration chambers has been carried out by many researchers. However, the theory is seldom employed by centrifuge modelers. Based on the work of spherical cavity expansion of previous researchers, this study proposed an analytical solution that incorporates the effects of cone geometry and surface roughness and the effect of compressibility to estimate the cone tip resistance. The calculated results are compared with the measured cone penetration resistance of four cone penetration tests performed in the centrifuge. The cone penetration tests were conducted in granular soil specimens having relative densities ranging between 54% and 89%. The comparison demonstrates the capacity of the cavity expansion theory in the prediction of the centrifuge cone penetration resistance.

scholarly journals Simple and Non-Linear Regression Techniques Used in Sandy-Clayey Soils to Predict the Pressuremeter Modulus and Limit Pressure: A Case Study of Tabriz Subway

2018 ◽  
Author(s):  
Samad Narimani ◽  
Hamid Chakeri ◽  
Seyed Morteza Davarpanah
Keyword(s):  
Test Performance ◽  
Field Tests ◽  
Empirical Equations ◽  
Clayey Soils ◽  
Regression Analyses ◽  
Uniaxial Compression Strength ◽  
Pressuremeter Test ◽  
Empirical Relations ◽  
Tabriz Metro ◽  
Regression Techniques

Nowadays, some common field tests consist of SPT test and pressuremeter test are performed in investigating the geotechnical parameters of projects such as tunneling. Due to the high cost of pressuremter test performance and its time-consuming procedure, using some empirical relations between SPT and Pressuremeter tests are recommended for primarily study of the project. The purpose of this study is to perform regression analyses between the NSPT and the uniaxial compression strength test and the pressuremeter test parameters obtained from a geotechnical investigation performed in route of 2nd line of Tabriz metro. Correlations were carried out for sandy and clayey soils separately. A series of simple and nonlinear multiple regression analyses are performed and as a result of analyses, several empirical equations are developed. It is shown that the empirical equations developed in this study are statistically acceptable. 

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