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This paper proposes the use of terrestrial laser scanning (TLS) measurements together with finite element method (FEM) numerical modeling to assess the current technical condition. The main aim of the paper was to evaluate the effect of point cloud size reduction on the quality of the geometric model and the ability to represent the corrosion level in assessing its load-carrying capacity. In this study, a standard scanning was performed on a historical object and a point cloud of a selected corroded element was generated. In order to further process the data, gradual reductions were made in the number of points from which meshes representing the geometry of the selected beam were created. Inaccuracy analyses of the meshes generated on the reduced point clouds were performed. Numerical analysis was then conducted for the selected mesh generated from the reduced point cloud. The results identified the locations of maximum stresses. The presented analysis showed that by developing the presented measurement and computational technique, laser scanning can be used to determine the degree of corrosion of hard-to-reach steel elements.
Daniel Wałach; Grzegorz Kaczmarczyk. Application of TLS Remote Sensing Data in the Analysis of the Load-Carrying Capacity of Structural Steel Elements. Remote Sensing 2021, 13, 2759 .
AMA StyleDaniel Wałach, Grzegorz Kaczmarczyk. Application of TLS Remote Sensing Data in the Analysis of the Load-Carrying Capacity of Structural Steel Elements. Remote Sensing. 2021; 13 (14):2759.
Chicago/Turabian StyleDaniel Wałach; Grzegorz Kaczmarczyk. 2021. "Application of TLS Remote Sensing Data in the Analysis of the Load-Carrying Capacity of Structural Steel Elements." Remote Sensing 13, no. 14: 2759.
Concrete is the one of the most important construction materials not only in terms of its global consumption but also environmental impact. However, there are many possibilities to reduce the environmental impact of concrete structures. This paper presents a set of factors determining the environmental impact of subsequent stages in the life cycles of concrete objects. In the research, the method of deduction and mathematical logic was applied to identify the parameters. Using the DEMATEL method, the significance of the identified factors was determined. An influential relation map allowed to specify a set of important parameters (causes) that affect the impact of the structure on the environment. The most important causes include: Concrete class, structural loads, static of the structure, materials used, and their suppliers as well as the volume of structural elements. The results of the analysis both confirmed the previous findings, as well as shows a set of indicators not previously highlighted. The cause-and-effect relationships between the parameters, and its significance was also determined. The results enable to indicate further directions of reducing the environmental impact of the concrete structure.
Daniel Wałach. Analysis of Factors Affecting the Environmental Impact of Concrete Structures. Sustainability 2020, 13, 204 .
AMA StyleDaniel Wałach. Analysis of Factors Affecting the Environmental Impact of Concrete Structures. Sustainability. 2020; 13 (1):204.
Chicago/Turabian StyleDaniel Wałach. 2020. "Analysis of Factors Affecting the Environmental Impact of Concrete Structures." Sustainability 13, no. 1: 204.
The identification of an anthropogenic environmental degradation has led to a transformation of social and economic trends in the world, which has resulted in the idea of sustainable development, which, in recent years, has become a key point of scientific consideration and a challenge for economic operators. Previously, the dominant aspects of the design of buildings and constructions were functional and structural issues. Nevertheless, based on sustainable development, a new approach to design has emerged, taking into account all the requirements for sustainable construction in one design process, called ILCD - integrated life-cycle design. The new concept combines the design of a building at the level of material, structural element and the whole structure, while, at the same time, assessing design solutions in terms of meeting technical requirements and, among others, economic and environmental efficiency. The development of concrete technology involving a new generation concrete with significantly improved properties, not only in terms of strength and durability but also in terms of rheology, has made it necessary to evaluate these materials from an economic and environmental point of view. The article presents such an assessment of new generation concretes. In this way, the idea of integrated design was presented in practice. The paper also indicates the sources of data and the tools that can be used for the inventory of the indicators for individual processes. The conducted analyses were also an attempt to estimate selected issues of the integrated design of new generation concrete technology against the background of normal concrete technology.
Daniel Wałach. Economic and Environmental Assessment of New Generation Concretes. IOP Conference Series: Materials Science and Engineering 2020, 960, 042013 .
AMA StyleDaniel Wałach. Economic and Environmental Assessment of New Generation Concretes. IOP Conference Series: Materials Science and Engineering. 2020; 960 (4):042013.
Chicago/Turabian StyleDaniel Wałach. 2020. "Economic and Environmental Assessment of New Generation Concretes." IOP Conference Series: Materials Science and Engineering 960, no. 4: 042013.
This paper is focused on verification and evaluation of the influence of the coarse aggregate size used in concrete mix composition on the bond properties between ribbed steel reinforcement and concrete. The mechanism of the bond between reinforcing steel and concrete is highly dependent on the mechanical properties of the concrete, such as its tensile strength or splitting, and on the intensity of the "aggregate interlock" phenomenon, which involves the interlocking of concrete particles in the ribbed spaces of the reinforcing steel. Given this, the aggregate composition used in the production of a concrete mix can have a significant role to play in the process of transferring loads from steel to concrete and the vice versa. As a part of the study, the bond and the compressive strength of specimens made of three high-performance concretes and two normal concretes. The research has shown that the choice of the aggregate composition used in the concrete mixture, depending on the type of ribbing of the main reinforcing bars, may increase the bond strength of the reinforcement to the concrete. Due to the different properties of HPC in relation to the NC, it can be assumed that the bond mechanism runs similarly in the concrete, while the individual phases of the bond failure may occur at different intensities and with the other ranges of displacement of the bar relative to the concrete.
Daniel Walach. The effect of aggregate composition on a bond between the steel reinforcement and the normal and high-performance concrete. IOP Conference Series: Materials Science and Engineering 2019, 603, 042055 .
AMA StyleDaniel Walach. The effect of aggregate composition on a bond between the steel reinforcement and the normal and high-performance concrete. IOP Conference Series: Materials Science and Engineering. 2019; 603 (4):042055.
Chicago/Turabian StyleDaniel Walach. 2019. "The effect of aggregate composition on a bond between the steel reinforcement and the normal and high-performance concrete." IOP Conference Series: Materials Science and Engineering 603, no. 4: 042055.
The objective of the study is the environmental assessment of construction solutions for concrete paving. In the study, unit environmental indicators for selected road construction solutions for the KR1 traffic have been determined. The considerations include road constructions with substructures made of: lean concrete, cement bound soil and crush-stone aggregate. Seven key environmental indicators were adopted for the evaluation as recommended by the PN-EN 15643-2:2011 standard “Sustainability of construction works. Part 2: Framework for the assessment of environmental performance”: global warming potential (GWP), ozone depletion potential (ODP), acid-generating potential (AP), eutrophication potential (EP), photochemical ozone creation potential (POCP), abiotic depletion potential for nonfossil resources (ADPE), abiotic depletion potential for fossil resources (ADPF). The weights were adopted on the basis of the DTT method, assessing the distance of EU domestic impacts from the desired state set by EU binding policy targets. Such evaluation enabled the prioritisation of concrete roads construction solutions from the point of view of environmental impact. The obtained measurements may be a part of the evaluation for the road investment projects. The presented approach disseminates sustainable design patterns in the area of engineering practice with the implementation of requests of the United Nations Framework Convention on climate change.
Daniel Wałach; Joanna Sagan; Justyna Jaskowska-Lemańska; Piotr Dybeł. Comparative Analysis of Environmental Impacts of Municipal Road Structures. Infrastructure and Environment 2019, 9 -14.
AMA StyleDaniel Wałach, Joanna Sagan, Justyna Jaskowska-Lemańska, Piotr Dybeł. Comparative Analysis of Environmental Impacts of Municipal Road Structures. Infrastructure and Environment. 2019; ():9-14.
Chicago/Turabian StyleDaniel Wałach; Joanna Sagan; Justyna Jaskowska-Lemańska; Piotr Dybeł. 2019. "Comparative Analysis of Environmental Impacts of Municipal Road Structures." Infrastructure and Environment , no. : 9-14.
The development of concrete technology results in a new generation of cement-based concrete such as high-performance concrete, self-compacting concrete and high-performance, self-compacting concrete. These concretes are characterised by better parameters not only in terms of strength and durability but also rheology of the mixtures. Obtaining such properties requires the adoption of a different composition and proportion of ingredients than ordinary concrete. The greater share of cement in these concretes causes an increase in the energy consumption and emissions (per unit of concrete volume) at the production stage. However, use of new generation concrete allows for a reduction of overall dimensions of a structural element, due to the increased strength parameters. Such a solution may finally result in lower consumption of resources and energy, as well as a decrease of gas emissions. The article presents the results of a comparative environmental analysis of ordinary and new generation concrete structures.
Daniel Wałach; Piotr Dybeł; Joanna Sagan; Magdalena Gicala. Environmental performance of ordinary and new generation concrete structures—a comparative analysis. Environmental Science and Pollution Research 2018, 26, 3980 -3990.
AMA StyleDaniel Wałach, Piotr Dybeł, Joanna Sagan, Magdalena Gicala. Environmental performance of ordinary and new generation concrete structures—a comparative analysis. Environmental Science and Pollution Research. 2018; 26 (4):3980-3990.
Chicago/Turabian StyleDaniel Wałach; Piotr Dybeł; Joanna Sagan; Magdalena Gicala. 2018. "Environmental performance of ordinary and new generation concrete structures—a comparative analysis." Environmental Science and Pollution Research 26, no. 4: 3980-3990.
The steel-to-concrete bond in high-performance self-compacting concrete (HPSCC) was investigated based on direct pull-out tests. The analysis was performed on specimens made from four different HPSCC mixes with varying contents of silica fume (SF) (0, 5, 10 and 15% by mass of cement). The specimens used allowed the determination of changes in bond at individual levels of elements with a total height of 160, 480, 800 and 1600 mm. The rebars in the elements were placed perpendicularly to the direction of concreting. A reference element, characterised by a parallel orientation to the direction of concreting, was also prepared. It was found that the modification of HPSCC using SF improved the quality of bond conditions, especially in the case of elements with substantial height. There was, however, no effect of rebar orientation with respect to this casting direction and to the change in bond stiffness.
Piotr Dybeł; Daniel Wałach. Influence of silica fume content on bond behaviour of reinforcement in HPSCC. Magazine of Concrete Research 2018, 70, 973 -983.
AMA StylePiotr Dybeł, Daniel Wałach. Influence of silica fume content on bond behaviour of reinforcement in HPSCC. Magazine of Concrete Research. 2018; 70 (19):973-983.
Chicago/Turabian StylePiotr Dybeł; Daniel Wałach. 2018. "Influence of silica fume content on bond behaviour of reinforcement in HPSCC." Magazine of Concrete Research 70, no. 19: 973-983.
When understanding the effect of the morphology of coarse aggregate on the properties of a fresh concrete mixture, the strength and deformability of self-compacting high-performance fibre-reinforced concrete (SCHPFRC) can be seen to be critical for its performance. In this research, regular and irregular grains were separated from granite coarse aggregate. The morphology of these grains was described while using digital image analysis. As a result, the aspect ratio, roundness and area ratio were determined in order to better understand this phenomenon. Then, the principal rheological, physical, and mechanical properties of SCHPFRC were determined. The obtained results indicated that the morphology of the grains of coarse aggregate has an impact on the strength and stiffness properties of SCHPFRC. Moreover, significant differences in the transverse strain of concretes were observed. The morphology of the coarse aggregate also has an impact on the rheological parameters of a fresh concrete mixture. To better understand this phenomenon, the hypothesized mechanism of the formation of SCHPFRC caused by different morphology of coarse aggregate was proposed at the end of the article.
Krzysztof Ostrowski; Łukasz Sadowski; Damian Stefaniuk; Daniel Wałach; Tomasz Gawenda; Konrad Oleksik; Ireneusz Usydus. The Effect of the Morphology of Coarse Aggregate on the Properties of Self-Compacting High-Performance Fibre-Reinforced Concrete. Materials 2018, 11, 1372 .
AMA StyleKrzysztof Ostrowski, Łukasz Sadowski, Damian Stefaniuk, Daniel Wałach, Tomasz Gawenda, Konrad Oleksik, Ireneusz Usydus. The Effect of the Morphology of Coarse Aggregate on the Properties of Self-Compacting High-Performance Fibre-Reinforced Concrete. Materials. 2018; 11 (8):1372.
Chicago/Turabian StyleKrzysztof Ostrowski; Łukasz Sadowski; Damian Stefaniuk; Daniel Wałach; Tomasz Gawenda; Konrad Oleksik; Ireneusz Usydus. 2018. "The Effect of the Morphology of Coarse Aggregate on the Properties of Self-Compacting High-Performance Fibre-Reinforced Concrete." Materials 11, no. 8: 1372.
An investigation of the steel-to-concrete bond in high-performance self-compacting concrete (HPSCC) is presented based on direct pull-out tests. The investigation was performed on specimens made of three different HPSCC mixes with varying contents of silica fume (without, 5 and 10% by mass of cement). Specifically, the top-bar effect in specimens with a single casting point at one edge was examined. Horizontal specimens with transverse rebars distributed over their heights (480 mm) and lengths (1600 mm) were cast. The bond capacity of the HPSCC was decreased across the length up to the measured rebar distance from the casting point. The reduction occurred with the same magnitude in both the lower and upper section of the horizontal specimens. It was found that the top-bar effect did not change significantly with an increasing distance of the rebars from the casting point of the concrete mixture. It was demonstrated that the modification of the HPSCC using the silica fume significantly improved the quality of the bond conditions.
Piotr Dybeł; Daniel Wałach; Krzysztof Ostrowski. The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete. Journal of Advanced Concrete Technology 2018, 16, 282 -292.
AMA StylePiotr Dybeł, Daniel Wałach, Krzysztof Ostrowski. The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete. Journal of Advanced Concrete Technology. 2018; 16 (7):282-292.
Chicago/Turabian StylePiotr Dybeł; Daniel Wałach; Krzysztof Ostrowski. 2018. "The Top-Bar Effect in Specimens with a Single Casting Point at One Edge in High-Performance Self-Compacting Concrete." Journal of Advanced Concrete Technology 16, no. 7: 282-292.
This paper provides an analysis of the development of bond strength in composite members of the concrete-to-concrete type. The experimental study was performed to evaluate the development of the bond strength between two concrete layers. In the study, two different types of concrete were used – normal concrete (NC) and high-performance concrete (HPC). Composite specimens of the substrate and overlay were of the NC-HPC and HPC-HPC types and reference NC-NC specimens were also made. The analysis of the bond strength was performed on composite cubes of size 150x150x150 mm which were subjected to splitting tension tests after 3, 7, 14 and 28 days of curing of the concrete overlay. The results of the study show that the basic phenomenon which affects bond strength is adhesion between concrete layers which develops with curing of the concrete overlay. The highest increase in the value of tensile bond strength was observed in the first 3 days of curing of the composite specimens. In this period the NC-NC composite reaches 53% of its 28-day tensile bond strength, the NC-HPC specimen – 67% and the HPC-HPC – 74%. The experiments showed different modes of interface failure depending on the configuration type of concrete in composite specimens. In the case of composite specimens NC-NC and HPC-HPC the observed dominant interface failure mode occurred within the overlay transition zone. For the NC-HPC specimens, the interface failure mode was observed both in the overlay transition zone and in substrate made of NC. No changes in the modes of bond mechanism failure were observed during curing of the composite specimens. The results obtained were compared with the existing studies in the literature on bond strength in composite concrete members.
Piotr Dybeł; Daniel Wałach. Evaluation of the Development of Bond Strength between Two Concrete Layers. IOP Conference Series: Materials Science and Engineering 2017, 245, 32056 .
AMA StylePiotr Dybeł, Daniel Wałach. Evaluation of the Development of Bond Strength between Two Concrete Layers. IOP Conference Series: Materials Science and Engineering. 2017; 245 (3):32056.
Chicago/Turabian StylePiotr Dybeł; Daniel Wałach. 2017. "Evaluation of the Development of Bond Strength between Two Concrete Layers." IOP Conference Series: Materials Science and Engineering 245, no. 3: 32056.
The paper presents an environmental and economic analysis of the material solutions of multi-level garage. The construction project approach considered reinforced concrete structure under conditions of use of ordinary concrete and high-performance concrete (HPC). Using of HPC allowed to significant reduction of reinforcement steel, mainly in compression elements (columns) in the construction of the object. The analysis includes elements of the methodology of integrated lice cycle design (ILCD). By making multi-criteria analysis based on established weight of the economic and environmental parameters, three solutions have been evaluated and compared within phase of material production (information modules A1-A3).
Daniel Wałach; Joanna Sagan; Magdalena Gicala. Assessment of Material Solutions of Multi-level Garage Structure Within Integrated Life Cycle Design Process. IOP Conference Series: Materials Science and Engineering 2017, 245, 072027 .
AMA StyleDaniel Wałach, Joanna Sagan, Magdalena Gicala. Assessment of Material Solutions of Multi-level Garage Structure Within Integrated Life Cycle Design Process. IOP Conference Series: Materials Science and Engineering. 2017; 245 (7):072027.
Chicago/Turabian StyleDaniel Wałach; Joanna Sagan; Magdalena Gicala. 2017. "Assessment of Material Solutions of Multi-level Garage Structure Within Integrated Life Cycle Design Process." IOP Conference Series: Materials Science and Engineering 245, no. 7: 072027.
Daniel Wałach; Marek Cała; Krzysztof Ostrowski; Justyna Jaskowska-Lemańska; Wydział Górnictwa i Geoinżynierii AGH Akademia Górniczo-Hutnicza. Analiza wpływu separowanych popiołów dennych na mrozoodporność betonu. Budownictwo o Zoptymalizowanym Potencjale Energetycznym 2017, 19, 47 -54.
AMA StyleDaniel Wałach, Marek Cała, Krzysztof Ostrowski, Justyna Jaskowska-Lemańska, Wydział Górnictwa i Geoinżynierii AGH Akademia Górniczo-Hutnicza. Analiza wpływu separowanych popiołów dennych na mrozoodporność betonu. Budownictwo o Zoptymalizowanym Potencjale Energetycznym. 2017; 19 (1):47-54.
Chicago/Turabian StyleDaniel Wałach; Marek Cała; Krzysztof Ostrowski; Justyna Jaskowska-Lemańska; Wydział Górnictwa i Geoinżynierii AGH Akademia Górniczo-Hutnicza. 2017. "Analiza wpływu separowanych popiołów dennych na mrozoodporność betonu." Budownictwo o Zoptymalizowanym Potencjale Energetycznym 19, no. 1: 47-54.
Marek Cała; Katarzyna Cyran; Marek Kawa; Malwina Kolano; Dariusz Łydżba; Michał Pachnicz; Magdalena Rajczakowska; Adrian Różański; Maciej Sobótka; Damian Stefaniuk; Agnieszka Stopkowicz; Daniel Wałach. Identification of Microstructural Properties of Shale by Combined Use of X-Ray Micro-CT and Nanoindentation Tests. Procedia Engineering 2017, 191, 735 -743.
AMA StyleMarek Cała, Katarzyna Cyran, Marek Kawa, Malwina Kolano, Dariusz Łydżba, Michał Pachnicz, Magdalena Rajczakowska, Adrian Różański, Maciej Sobótka, Damian Stefaniuk, Agnieszka Stopkowicz, Daniel Wałach. Identification of Microstructural Properties of Shale by Combined Use of X-Ray Micro-CT and Nanoindentation Tests. Procedia Engineering. 2017; 191 ():735-743.
Chicago/Turabian StyleMarek Cała; Katarzyna Cyran; Marek Kawa; Malwina Kolano; Dariusz Łydżba; Michał Pachnicz; Magdalena Rajczakowska; Adrian Różański; Maciej Sobótka; Damian Stefaniuk; Agnieszka Stopkowicz; Daniel Wałach. 2017. "Identification of Microstructural Properties of Shale by Combined Use of X-Ray Micro-CT and Nanoindentation Tests." Procedia Engineering 191, no. : 735-743.
The article presents research results of the strength parameters of HPC achieved in various research conditions. The research was carried out on substantially different samples, both as to the size as the slenderness ratio. Moreover, the assessment of the effect of speed of a load on strength parameters as well as other factors which in a significant way show the difference in the strength values was made. For comparison, the results were also applied to the relations known in ordinary concrete.
Daniel Wałach. Impact of the Research Conditions on the Accuracy of the Designation of High Performance Concrete Strength Parameters. Archives of Civil Engineering 2016, 62, 139 -152.
AMA StyleDaniel Wałach. Impact of the Research Conditions on the Accuracy of the Designation of High Performance Concrete Strength Parameters. Archives of Civil Engineering. 2016; 62 (4):139-152.
Chicago/Turabian StyleDaniel Wałach. 2016. "Impact of the Research Conditions on the Accuracy of the Designation of High Performance Concrete Strength Parameters." Archives of Civil Engineering 62, no. 4: 139-152.
E3S Web of Conferences, open access proceedings in environment, energy and earth sciences
Daniel Wałach; M. Filipowicz; M. Dudek; T. Olkuski; K. Styszko. Impact of separated bottom ashes on the parameters of concrete mix and hardened concrete. E3S Web of Conferences 2016, 10, 00099 .
AMA StyleDaniel Wałach, M. Filipowicz, M. Dudek, T. Olkuski, K. Styszko. Impact of separated bottom ashes on the parameters of concrete mix and hardened concrete. E3S Web of Conferences. 2016; 10 ():00099.
Chicago/Turabian StyleDaniel Wałach; M. Filipowicz; M. Dudek; T. Olkuski; K. Styszko. 2016. "Impact of separated bottom ashes on the parameters of concrete mix and hardened concrete." E3S Web of Conferences 10, no. : 00099.
Justyna Jaskowska-Lemańska; Daniel Wałach. Impact of the Direction of Non-destructive Test with Respect to the Annual Growth Rings of Pine Wood. Procedia Engineering 2016, 161, 925 -930.
AMA StyleJustyna Jaskowska-Lemańska, Daniel Wałach. Impact of the Direction of Non-destructive Test with Respect to the Annual Growth Rings of Pine Wood. Procedia Engineering. 2016; 161 ():925-930.
Chicago/Turabian StyleJustyna Jaskowska-Lemańska; Daniel Wałach. 2016. "Impact of the Direction of Non-destructive Test with Respect to the Annual Growth Rings of Pine Wood." Procedia Engineering 161, no. : 925-930.
Daniel Wałach. Impact of Delays During Concreting of Reinforced High-performance Concrete Beams. Procedia Engineering 2016, 161, 356 -361.
AMA StyleDaniel Wałach. Impact of Delays During Concreting of Reinforced High-performance Concrete Beams. Procedia Engineering. 2016; 161 ():356-361.
Chicago/Turabian StyleDaniel Wałach. 2016. "Impact of Delays During Concreting of Reinforced High-performance Concrete Beams." Procedia Engineering 161, no. : 356-361.
The article presents a geotechnical hazard neutralisation technology for shaft structures. The diagnosis of problems with uncontrolled subsidence of the ventilation duct provided by the authors enabled the development of a schedule of works required for the protection and reinforcement of foundation soil in the shaft area. The technology of protection works was selected after the analysis of the technical condition of shaft structures as well as hydrological and geomechanical conditions. Due to the closeness of the shaft lining, it was necessary to form grout columns using jet grouting and low-pressure grouting technologies. The article presents the issues related to the selected technology and its application to the neutralisation of the emergent geotechnical hazard. The method of performance of recommended works was also described together with their impact on the technical condition of structures discussed as well as their functionality and usage.
Piotr Dybeł; Daniel Wałach; Justyna Jaskowska-Lemańska. Technical Note: Example of the Application of Jet Grouting to the Neutralisation of Geotechnical Hazard in Shaft Structures. Studia Geotechnica et Mechanica 2015, 37, 95 -99.
AMA StylePiotr Dybeł, Daniel Wałach, Justyna Jaskowska-Lemańska. Technical Note: Example of the Application of Jet Grouting to the Neutralisation of Geotechnical Hazard in Shaft Structures. Studia Geotechnica et Mechanica. 2015; 37 (3):95-99.
Chicago/Turabian StylePiotr Dybeł; Daniel Wałach; Justyna Jaskowska-Lemańska. 2015. "Technical Note: Example of the Application of Jet Grouting to the Neutralisation of Geotechnical Hazard in Shaft Structures." Studia Geotechnica et Mechanica 37, no. 3: 95-99.
The article presents an evaluation of the technical conditions of the shaft collar as well as its load capacity in which the consequences of uncontrolled displacement of part of the ventilation drift could have caused additional stress to occur. On the basis of comprehensive diagnostic examination undertaken by the authors, a comprehensive analysis of the static resistance of the shaft collar, which takes into consideration the exceptional unintended load. Examinations as well as calculations carried out have allowed for the evaluation of the practical degree of danger for shaft objects (constructions) as well as their infrastructure.
Daniel Wałach; Piotr Dybeł; Marek Cała; Justyna Jaskowska-Lemańska. Evaluation Of Load Capacity Of Shaft Collar Subject To Unintended Exceptional Loads. Archives of Mining Sciences 2015, 60, 613 -624.
AMA StyleDaniel Wałach, Piotr Dybeł, Marek Cała, Justyna Jaskowska-Lemańska. Evaluation Of Load Capacity Of Shaft Collar Subject To Unintended Exceptional Loads. Archives of Mining Sciences. 2015; 60 (2):613-624.
Chicago/Turabian StyleDaniel Wałach; Piotr Dybeł; Marek Cała; Justyna Jaskowska-Lemańska. 2015. "Evaluation Of Load Capacity Of Shaft Collar Subject To Unintended Exceptional Loads." Archives of Mining Sciences 60, no. 2: 613-624.
The paper presents geomechanical properties of rock mass occurring in the initial section of shaft lining during its execution. The shaft being sunk is surrounded with cohesive soils, mainly clays with sand layers and silts. Such lithology causes that in various levels some parts of strata are saturated with water. This results in a considerable changeability of soil properties in time. With high water content, the soil is washed away leading to local loss of contact between shaft lining and surrounding soils. This, in turn, results in lack of proper support for curbs and shaft lining fracture in some sections. Engineering activity in such a case should embrace sealing injections in selected parts of the shaft in order to resume proper reinforcement in the lining-rock mass system. The studies of the soils surrounding shaft lining were supposed to help design curbs with increased bearing capacity. The tests of soils indicated that the angle of internal friction and cohesion do change not only at different depths but also at the same depth in different points of perimeter. It was also observed during the study that the mechanical parameters of the analyzed soils improve as the distance from the shaft lining increases, which clearly indicates change of soil properties in the direct neighborhood of the shaft. Considerable number of tests carried out in the study allowed to determine the relationship between water content and angle of internal friction or soil cohesion. The determined relationships can help to estimate change of soil properties under the influence of water with considerable precision. The reinforcement of curbs executed with the use of ground anchors allowed for further shaft sinking. The tests of concrete used in the shaft carried out in the analyzed section produced results similar to the values assumed in the project.
Tadeusz Majcherczyk; Zbigniew Niedbalski; Daniel Wałach. Variations in Mechanical Parameters of Rock Mass Affecting Shaft Lining / Zmiany Parametrów Mechanicznych Górotworu I Ich Wpływ Na Obudowę Szybową. Archives of Mining Sciences 2013, 58, 629 -642.
AMA StyleTadeusz Majcherczyk, Zbigniew Niedbalski, Daniel Wałach. Variations in Mechanical Parameters of Rock Mass Affecting Shaft Lining / Zmiany Parametrów Mechanicznych Górotworu I Ich Wpływ Na Obudowę Szybową. Archives of Mining Sciences. 2013; 58 (3):629-642.
Chicago/Turabian StyleTadeusz Majcherczyk; Zbigniew Niedbalski; Daniel Wałach. 2013. "Variations in Mechanical Parameters of Rock Mass Affecting Shaft Lining / Zmiany Parametrów Mechanicznych Górotworu I Ich Wpływ Na Obudowę Szybową." Archives of Mining Sciences 58, no. 3: 629-642.