Interpretation of undrained self-boring pressuremeter test results incorporating unloading

1992 ◽  
Vol 29 (6) ◽  
pp. 918-928 ◽  
Author(s):  
R. S. Ferreira ◽  
P. K. Robertson
Keyword(s):  
Key Words ◽  
Soil Disturbance ◽  
Final Part ◽  
Test Results ◽  
Soil Behavior ◽  
Pressuremeter Test ◽  
Nonlinear Soil Behavior ◽  
Early Loading ◽  
Loading And Unloading ◽  
Interpretation Method

An interpretation method has been developed to incorporate nonlinear soil behavior to interpret undrained pressuremeter test results. The method makes use of both the loading and unloading portions of the pressuremeter test. The proposed interpretation method accepts that some level of soil disturbance may exist during the early loading portion of the pressuremeter test. This is accomplished by putting greater emphasis on the unloading portion and the final part of the loading portion of the test. The method is evaluated using self-boring pressuremeter results from Fucino, Italy. Key words : pressuremeter, interpretation, undrained, unloading.

Large-strain undrained pressuremeter interpretation based on loading and unloading data

1994 ◽  
Vol 31 (1) ◽  
pp. 71-78 ◽  
Author(s):  
R.S. Ferreira ◽  
P.K. Robertson
Keyword(s):  
Large Strain ◽  
Soil Disturbance ◽  
Curve Matching ◽  
Test Results ◽  
Pressuremeter Test ◽  
Matching Process ◽  
Loading And Unloading ◽  
Microcomputer Software ◽  
Soil Behaviour ◽  
Interpretation Method

Traditionally pressuremeter tests results are interpreted using only the loading pressure–expansion data. An interpretation method has been developed that makes use of both the loading and unloading portions of a pressuremeter test and incorporates nonlinear, undrained soil behaviour. This method has been modified to handle large trains. The proposed interpretation accepts that some level of soil disturbance exists during the early stages of a pressuremeter test, and hence more emphasis is placed on the unloading portion of the test. A methodology is described to allow this interpretation procedure to be applied to self-bored, prebored, and full-displacement undrained pressuremeter tests. The proposed method is evaluated using self-boring and full-displacement pressuremeter test results from various published field projects. The interpretation is accomplished using commercially available microcomputer software that can perform the curve-matching process for both loading and unloading portions of the test. Key words : pressuremeter, loading data, unloading data.

Research of pneumatic conveyor for overloading of fuel pellets

2021 ◽  
pp. 88-96
Author(s):  
N. Spodyniuk ◽  
◽  
L. Horbachenko ◽  
Keyword(s):  
Key Words ◽  
Agricultural Sector ◽  
Raw Materials ◽  
Agricultural Waste ◽  
High Quality ◽  
Fuel Pellets ◽  
Energy Consuming ◽  
Loading And Unloading

The constant development of the country's agricultural sector allows the production of biofuels, such as fuel pellets, from agricultural waste - straw, corn and sunflower husks. However, the transportation of fuel pellets is quite energy consuming. The process of loading and unloading, transportation over long distances requires complex mechanized equipment. The use of a pneumatic conveyor for grain reloading will allow to provide high-quality transportation of fuel pellets. The aim of the article was to investigate the operation of the pneumatic conveyor for overloading fuel pellets, to determine the optimal indicators that affect the productivity of the pneumatic conveyor. Since fuel pellets, as raw materials, are structurally similar to cereals, a study of the pneumatic grain conveyor PTZ-25 was conducted. The dependence of the productivity of the pneumatic conveyor on the lifting height h, m and the length of the pipelines L, m was obtained. The obtained results showed that by reducing the length of the pipelines by four times and the lifting height by half, the productivity of the pneumatic conveyor will increase by 1.15 times. Key words: fuel pellets, pneumatic conveyor, productivity

scholarly journals Dimensi Alam Kehidupan dan Manunggaling Kawula­Gusti dalam Serat Jatimurti

ATAVISME ◽  
2013 ◽  
Vol 16 (2) ◽  
pp. 153-167
Author(s):  
Andi Asmara
Keyword(s):  
Discourse Analysis ◽  
Key Words ◽  
Human Soul ◽  
Literary Works ◽  
Pragmatic Theory ◽  
Interpretation Method ◽  
Natural Life

Artikel ini bertujuan memahami dimensi alam kehidupan dan proses pencapaian manunggaling kawula­Gusti menurut Serat Jatimurti. Terpahaminya dimensi alam kehidupan tersebut diharapkan mampu menuntun pelaku mistik kejawen mencapai tujuan mistiknya. Puncak laku mistik orang kejawen adalah manunggaling kawul ­Gusti. Metode yang digunakan adalah metode analisis wacana dan interprestasi. Teori yang dmanfaatkan ialah teori pragmatik. Teori pragmatik diterapkan karena berkait erat dengan manfaat karya sastra bagi pembaca dan masyarakat. Hasil pengkajian ini adalah terungkapnya berbagai dimensi alam kehidupan dan makna manunggaling kawula­ Gusti, yaitu menyatunya gesang sejati atau urip sejati dengan Kang Maha Gesang atau Kang Maha Urip, Tuhan Yang Maha Esa. Abstract: The aim of this article is to comprehend the dimension of natural life and the achievement process of manunggaling kawula Gusti ‘the unity of human soul and God’ according to Serat Jatimurti. It is expected that comprehending the natural life dimensions can lead the performer of mystic of kejawen to get his mystical goal. The ultimate mystical goal of the kejawen people is manunggaling kawula Gusti. The data was analyzed by using discourse analysis and interpretation method. The pragmatic theory was applied because it was closely related with the benefit of the literary works for the reader and the society. This study has found various dimensions of natural life and the meaning of manunggaling kawula Gusti, which is the unity of true gesang or true urip ‘life’ with God, Kang Maha Gesang or Kang Maha Urip ‘the eternal’. Key Words: natural life dimension, manunggaling kawula­Gusti, Serat Jatimurti

scholarly journals Undrained Pore Pressure Development on Cohesive Soil in Triaxial Cyclic Loading

2019 ◽  
Vol 9 (18) ◽  
pp. 3821 ◽  
Author(s):  
Andrzej Głuchowski ◽  
Emil Soból ◽  
Alojzy Szymański ◽  
Wojciech Sas
Keyword(s):  
Stress State ◽  
Cyclic Loading ◽  
Pore Pressure ◽  
Cohesive Soil ◽  
Soil Samples ◽  
Test Results ◽  
Soil Behavior ◽  
Pressure Development ◽  
Undrained Conditions ◽  
Excess Pore

Cohesive soils subjected to cyclic loading in undrained conditions respond with pore pressure generation and plastic strain accumulation. The article focus on the pore pressure development of soils tested in isotropic and anisotropic consolidation conditions. Due to the consolidation differences, soil response to cyclic loading is also different. Analysis of the cyclic triaxial test results in terms of pore pressure development produces some indication of the relevant mechanisms at the particulate level. Test results show that the greater susceptibility to accumulate the plastic strain of cohesive soil during cyclic loading is connected with the pore pressure generation pattern. The value of excess pore pressure required to soil sample failure differs as a consequence of different consolidation pressure and anisotropic stress state. Effective stresses and pore pressures are the main factors that govern the soil behavior in undrained conditions. Therefore, the pore pressure generated in the first few cycles plays a key role in the accumulation of plastic strains and constitutes the major amount of excess pore water pressure. Soil samples consolidated in the anisotropic and isotropic stress state behave differently responding differently to cyclic loading. This difference may impact on test results analysis and hence may change the view on soil behavior. The results of tests on isotropically and anisotropically consolidated soil samples are discussed in this paper in order to point out the main features of the cohesive soil behavior.

Volume change indices during loading and unloading of an unsaturated soil

1992 ◽  
Vol 29 (2) ◽  
pp. 195-207 ◽  
Author(s):  
D. Y. F. Ho ◽  
D. G. Fredlund ◽  
H. Rahardjo
Keyword(s):  
Soil Properties ◽  
Key Words ◽  
Volume Change ◽  
Unsaturated Soil ◽  
Constitutive Relations ◽  
Change Theory ◽  
Glacial Till ◽  
Testing Procedures ◽  
Loading And Unloading ◽  
Oedometer Tests

The paper presents the volume change theory and the designation of associated soil properties that must be measured for an unsaturated soil. The equipment required for the measurement of each of the relevant volume relationships is described. Several testing procedures for obtaining the volume change indices during loading and unloading of an unsaturated soil are presented. Typical results from loading and unloading tests on compacted silt and compacted glacial till specimens are presented and analyzed. The analysis is given in order to illustrate the application of the volume change theory to practical problems. Key words : unsaturated soil, volume change indices, constitutive relations, coefficients of volume change, oedometer tests.

scholarly journals Disturbances Generated by Lighting Systems with LED Lamps and the Reduction in Their Impacts

2019 ◽  
Vol 9 (22) ◽  
pp. 4894 ◽  
Author(s):  
Putz ◽  
Bednarek ◽  
Nawrowski
Keyword(s):  
Power Supply ◽  
Final Part ◽  
Test Results ◽  
Two Stage ◽  
Higher Harmonics ◽  
Led Lighting ◽  
Electrical Systems ◽  
Lighting Systems ◽  
Electromagnetic Disturbances

The paper deals with electromagnetic disturbances in the form of current higher harmonics, which are generated by LED lighting elements. It presents the problems related to the formation and impact of higher harmonics in the electrical systems of commercial facilities. The results of tests and analyses of current distortions for two different LED lamps are included, and these are in reference to the parameters set out in the normal applicable standards. A system was then proposed to improve the quality of energy in the mains of commercial facilities in the form of a two-stage power supply. Tests of the systems with the aforementioned LED lamps were conducted and commented upon after introduction of the two-stage power supply. The final part of the paper contains a summary of the obtained test results.

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