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Pile design based on Penetration tests
Koudela, Pavel ; Leiter, Augustin (referee) ; Štefaňák, Jan (advisor)
Application of penetration tests at the design of piles foundation is the main subject of this thesis. The main target of this work is calculation of bearing capacity and settlement of single piles. In the thesis are use a new computational relations based on corelation which used relation between penetration values and parameters from laboratory tests. The bearing capacity of the pile is calculation from the derived relations, by the software and laboratory test, too. This types of calculations are executed for comparasion with new computational relations.
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Zhutňování vyklizovacích linek vlivem kolových těžebně dopravních systémů =: Strip road compaction caused by wheeled logging machinery /
Kleibl, Miroslav
The aim of the study is an assessment of forest soil compaction caused by wheeled logging technology and the soil ability to regenerate into the original conditions. The method is based on assumption that multiple passage significantly affects the rate of compaction and that the compaction occurs not only on striproads, but reaches deeper into the stand. After the operation the soil has an ability to return into the original condition thanks to natural processes. The return level assessment is done using a range of laboratory tests and a number of devices, respectively. Each of the device works on different principle which sets the limitation of usage and the study ambition is also an evaluation, which kind of device is applicable for soil compaction assessment. The results of the study displays that the soil compaction reaches more than 1 m deep into the stand side of the striproad. The regeneration ability of the soil into the original condition is visible after 5 years after the operation and on sandy soils can reach about 50%. For assessment of the soil compaction and soil recovery could be used in limited applicability deflectometer, penetrometer, laboratory tests of Kopecky metal rings and CO2 gauge, respectively. Since the limitation of each method or device, the assumption of the study is different devices combination during evaluation process.
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The comparison of different methods for soil physical properties determination
Domin, Vojtěch ; Kumhála, František (advisor) ; Mašek, Jiří (referee)
This diploma thesis is focused on comparison of the methods which are used for soil physical properties measurement . A penetrometer and Kopecky rollers were used. To assess these methods, the soil properties were evaluated on the land of joint-stock company Sloveč near Městce Králové. The first part of this thesis consists of an introduction which describes the basic information related to this issue. The second part deals with literature review where the basic physical properties of soils are discussed, such as porosity and bulk density. The aim of this diploma thesis is mentioned in the third part. It is followed by the methodology in which the different methods of measurement are described. The next chapter focuses on the analysis of measured data and its evaluation. The next part deals with the technical-economic evaluation of measurement methods. The last part brings the conclusion which summarizes all the results of the thesis. The most interesting result of this diploma thesis that penetrometric measurement is affected by soil moisture content so significantly that it can show soil compaction entirely on other areas of the land than measurements using Kopecky rollers.
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Influence of application of activators of vital soil functions on selected soil characteristics at Agrovýzkum Rapotín s.r.o.
Blaha, Josef ; Šařec, Ondřej (advisor) ; Ladislav, Ladislav (referee)
This thesis describes and evaluates changes of selected physical properties using various excipients, manure and fertilizer. The first part is a literature review prepared for introduction to the soil and soil properties. Further analyzes the problem of soil improvers and their division. Selected soil substances are described in detail in some of the chapters. Subsequently describes some previous attempts substance PRP SOL. The evaluation of the impact on the application of the plant is working in Chapter 4 are listed first, soil and climatic conditions of the land block, which are made different versions of the test. Further I describe the evaluation of selected soil properties, which include, bulk density, soil moisture penetration resistance, infiltration capacity of soils and soil traction resistance when processing a disc harrow. The final chapter is devoted to a discussion of the assessed properties and the overall summary of the attempt.
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Influence of soil compaction on production parameters of sugar beet
Balák, František ; Pulkrábek, Josef (advisor) ; Milan, Milan (referee)
The methods of autumn tillage in sugar beet are still oriented mainly on classic cultivation, which is based on ploughing. Minimalization methods have recently appeared in sugar beet as well, mainly due to their anti-erosion effect. This thesis deals with question, whether is the minimalization tillage able to match classic cultivation in its positive effect on soil fertility. To compare the effect, penetration resistance has been measured, as it serves as an indicator of field compaction, which should be alleviated by autumn tillage. Aim of this thesis is to measure the effect of soil compaction on soil cultivated by ploughing or deep chiseling in a particular area of sugar beet and to assess the impact of soil compaction on its production.
Research has taken place in semi-practice experiments in fields in the vicinity of Jičín in years from 2012 to 2015. Measured field parameters were soil penetration resistance and soil wetness. Rated parts of vegetation have been manually harvested in technological maturity and from sampled tubers has been determined yield, sugar content and other quality parameters. Tested fields were medium compacted, penetration resistance to 40 cm was in average between 3 to 4 MPa, depending on tillage quality and on sampling date. Ploughing and deep chiseling managed to provably alleviate soil compaction and thus considerably helped to setup sugar beet vegetation well. Yield and qualityparameters were very good, yield of tubers reached in average 95 t.ha-1 and the sugar content 18,7 %. Yield of polarization sugar reached in average 17,8 t.ha-1.
As the research has shown, autumn tillage by deep chiseling is in its soil loosening effect comparable with ploughing and even exceeds it a little in its influence on vegetation quality. Good autumn tillage raises values of all yield factors and quality parameters. Between basic parameters of yields were found no statistically significant differences for the two autumn tillage methods. In the yield of polarization sugar per hectare was found a statistically significant difference of 1,5 % for the benefit of deep chiseling.
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Pile design based on Penetration tests
Koudela, Pavel ; Leiter, Augustin (referee) ; Štefaňák, Jan (advisor)
Application of penetration tests at the design of piles foundation is the main subject of this thesis. The main target of this work is calculation of bearing capacity and settlement of single piles. In the thesis are use a new computational relations based on corelation which used relation between penetration values and parameters from laboratory tests. The bearing capacity of the pile is calculation from the derived relations, by the software and laboratory test, too. This types of calculations are executed for comparasion with new computational relations.
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Hodnocení penetračního odporu půdy v meziřadí vinic
Sedláček, Zdeněk
This dissertation with the evaluation of soil penetration resistance area between rows of vineyards. Values and the results evaluated here are two periods, spring and autumn of 2014 at two sites, Lednice and Pouzdřany. At each station was performed 25 measurements at depths of 40-520 mm, in the field of rail tracks and grassy Wednesday and cultivated an alleyway. To check was measured axis line. The thesis shows the unsatisfactory condition of the soil at all sites.
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