This master thesis deals with the pavement management system as a tool for a management and maintenance of the roads in the Liberec region. The aim is to collect road failures within the network pavement management system level on roads of 2nd and 3rd class. The resulting data will be used for evaluate pavement condition and make plans of pavement maintenance and rehabilitation in variants. Furthermore, the thesis deals with individual variants in the process of data evaluation when evaluating their suitability and accuracy. The theoretical part summarises the information needed to understand the functioning of the road management system, as well as a description of the software used to collect and subsequent work with the data. In the practical part are presented results of the thesis and moreover the questions arising from the goals set are answered.

Master‘s thesis deals with pavement management system applied on roads of 2nd and 3rd class in region of Hradec Králové. Its task is to collect failures of pavement, evaluate pavement condition and make plans of pavement maintenance and rehabilitation in variants. One of tasks is also to evaluate attitude of pavement management system in regional level, but also to evaluate the contributions and weaknesses of systematic steps and attitude of access of stakeholders.

The research described herein is composed of four major areas of practice. It examines the overall performance of runways and provides tools designed to improve current runway operations and management with particular emphasis on contaminated surfaces. Presented in this thesis is an overview of how to design airport pavements in order to achieve optimal friction by specifically focusing on material selection and construction techniques for rigid and flexible pavements. Rubber buildup and the impact rubber accumulation has on decreasing runway friction, particularly in a range of climatic conditions, is discussed. Four commonly used rubber removal techniques are presented and evaluated. Through this research, an analytical hierarchy process (AHP) decision making protocol was developed for incorporation into airport pavement management systems (APMS). Runway surface condition reporting practices used at the Region of Waterloo International Airport are evaluated and recommendations for improving current practices are identified. Runway surface condition reporting can be improved by removing subjectivity, reporting conditions to pilots in real time, standardizing terminology and measurement techniques, and including runway pictures or sketches to identify contaminant locations where possible. Reports should be incorporated and stored in the APMS. Aircraft braking systems and their effects on landing distances under contaminated conditions are discussed. This thesis presents a proposed solution for monitoring and measuring contaminated runway surfaces and identifying the risks associated with aircraft landing through using the Braking Availability Tester (BAT). Also proposed in this thesis is a testing framework for validating the Braking Availability Tester. The proposed BAT measures interaction between aircraft antiskid braking systems and runway contaminants to determine landing distances more accurately. Finally, this thesis includes a discussion explaining how pavement design, contaminant removal, results from friction tests, and results from the BAT can be incorporated into airport pavement management systems. APMS data can be analyzed to economically optimize and prioritize scheduling of pavement maintenance, preservation and rehabilitation treatments to maintain a high level of service, thereby contributing to runway safety and optimization.

The research described herein is composed of four major areas of practice. It examines the overall performance of runways and provides tools designed to improve current runway operations and management with particular emphasis on contaminated surfaces. Presented in this thesis is an overview of how to design airport pavements in order to achieve optimal friction by specifically focusing on material selection and construction techniques for rigid and flexible pavements. Rubber buildup and the impact rubber accumulation has on decreasing runway friction, particularly in a range of climatic conditions, is discussed. Four commonly used rubber removal techniques are presented and evaluated. Through this research, an analytical hierarchy process (AHP) decision making protocol was developed for incorporation into airport pavement management systems (APMS). Runway surface condition reporting practices used at the Region of Waterloo International Airport are evaluated and recommendations for improving current practices are identified. Runway surface condition reporting can be improved by removing subjectivity, reporting conditions to pilots in real time, standardizing terminology and measurement techniques, and including runway pictures or sketches to identify contaminant locations where possible. Reports should be incorporated and stored in the APMS. Aircraft braking systems and their effects on landing distances under contaminated conditions are discussed. This thesis presents a proposed solution for monitoring and measuring contaminated runway surfaces and identifying the risks associated with aircraft landing through using the Braking Availability Tester (BAT). Also proposed in this thesis is a testing framework for validating the Braking Availability Tester. The proposed BAT measures interaction between aircraft antiskid braking systems and runway contaminants to determine landing distances more accurately. Finally, this thesis includes a discussion explaining how pavement design, contaminant removal, results from friction tests, and results from the BAT can be incorporated into airport pavement management systems. APMS data can be analyzed to economically optimize and prioritize scheduling of pavement maintenance, preservation and rehabilitation treatments to maintain a high level of service, thereby contributing to runway safety and optimization.

Prieš rengiant kelių investicinius projektus surenkami ir detaliai analizuojami esami kelių eksploatacinių rodiklių duomenys ir jų reglamentuotų norminių reikšmių atitiktis. Baigiamajame darbe išanalizuoti automobilių kelių asfaltbetonio dangos būklės, patikimumo bei šių rodiklių gavimo ir apdorojimo metodai. Pateikiamas automobilių kelių asfaltbetonio dangos reikiamų eksploatacinių rodiklių teorinis pagrindimas, reglamentuotos norminės reikšmės bei eksploatacinių rodiklių gerinimo svarba. Naudojantis tyrimų, atliktų Lietuvos svarbiausiuose magistraliniuose keliuose A1 Vilnius – Kaunas - Klaipėda ir A5 Kaunas – Marijampolė - Suvalkai, duomenimis, atlikta pagrindinių eksploatacinių rodiklių - dangos lygumo, rato su danga sukibimo koeficiento, dangos suirimo masto rodiklio, konstrukcijos deformacijos modulio bei provėžų gylio analizė ir šių rodiklių kitimas laiko atžvilgiu. Nustatyta dangos būklę apibūdinančių rodiklių sietis. Analizės pagrindu pateikti rekomenduojami leistinieji dangos lygumo rodikliai. Pateiktos išvados ir rekomendacijos. Baigiamojo darbo aprašomojo skyriaus apimtis – 89 psl., 17 lentelių, 90 paveikslų, 44 bibliografiniai šaltiniai. / Before the preparation of highway investment projects, the available data of highway maintenance indices are collected and analysed and their conformity with the standard values is established. The thesis deals with the analysis of reliability of the condition of highway asphalt concrete pavement and the indices collection and procession methods. The thesis includes the theoretical grounding of the necessary maintenance indices of the highway asphalt concrete pavement, standard values and the importance of improvement of the maintenance indices. Using the data of the testing performed in the main Lithuanian highways A1 Vilnius – Kaunas - Klaipėda and A5 Kaunas – Marijampolė - Suvalkai, the analysis of the basic maintenance indices, i.e. pavement smoothness, wheel adherence coefficient, pavement breakup degree index, construction deformation module and furrow depth, and the change of such indices in the terms of time has been carried out. The link between the indices characterising the condition of the pavement has been determined. Basing on the analysis, the recommended permitted pavement smoothness indices are presented. The conclusions and recommendations of the thesis are introduced. Theses consist of: 89 p. text without appendixes, 90 pictures, 17 tables, 44 bibliographical entries.

Disertacijos tikslas – parengti magistralinių automobilių kelių asfaltbetoninės dangos eksploatacinių rodiklių prognozės matematinius modelius, atsižvelgiant į tampriosios dangos konstrukcijos savybes ir transporto priemonių (TP) eismo intensyvumą (EI). Darbe iškelti šie svarbiausieji uždaviniai: išanalizuoti automobilių kelių asfaltbetoninės (AB) dangos eksploatacinius rodiklius lemiančius svarbiausius veiksnius ir atskleisti šių rodiklių blogėjimo priežastis; atlikti magistralinių kelių dangos konstrukcijų (KDK) sluoksniams naudojamų medžiagų kokybės rodiklių tyrimus; nustatyti AB dangos komponentinės sudėties, fizinių bei mechaninių rodiklių ir AB mišiniams naudojamų medžiagų kokybės rodiklių sietį; ištirti AB dangos lygumo ir provėžų gylio kitėjimo dėsningumus; nustatyti AB dangos, kitų (KDK) sluoksnių medžiagų kokybės rodiklių sietį; parinkti dvi racionalias magistralinių kelių tampriosios dangos konstrukcijas (skirtingam TP eismui). Disertaciją sudaro įvadas, keturi skyriai, rezultatų apibendrinimas, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašai ir priedai. Įvade aptarta tiriamoji problema, darbo aktualumas, tyrimų objektas, darbo tikslas ir uždaviniai, tyrimų metodika, darbo mokslinis naujumas, darbo rezultatų praktinė vertė ir ginamieji teiginiai. Pirmajame skyriuje išnagrinėti įvairių šalių mokslininkų atlikti automobilių kelių asfaltinės dangos bei jos konstrukcijos eksploatacinių rodiklių ir jų funkcionavimo trukmės tyrimai. Antrajame... [toliau žr. visą tekstą] / The aim of the dissertation is based on the properties of flexible road pavement structures to develop a mathematical models for predicting the performance of wearing courses used in the pavements of the main roads. The main tasks of the dissertation are as follows: to analyze the main factors influencing the service indices of asphalt concrete pavements and to determine their reasons; to investigate the quality of materials and mixtures used in pavement structural layers of the main roads; to determine the interaction between asphalt concrete pavement composition and the quality indices of mixture materials; to study regularities of the change in pavement roughness and rut depth; to determine the interaction between the quality indices of materials used in pavement structural layers; to select two rational flexible pavement structures for the main roads (for the different traffic volume). The dissertation consists of introduction, four chapters, general conclusions, the list of references and the list of author’s publications on the topic of the dissertation, addenda. Introduction describes the studied problem, topicality of the problem, the object of research, also the aim and tasks, research methodology, scientific novelty, practical value of the results and the defended propositions. Chapter 1 gives the analysis of scientific researches made by different countries in the field of the performance of asphalt concrete pavements and their structures, duration of their... [to full text]

The aim of the dissertation is based on the properties of flexible road pavement structures to develop a mathematical models for predicting the performance of wearing courses used in the pavements of the main roads. The main tasks of the dissertation are as follows: to analyze the main factors influencing the service indices of asphalt concrete pavements and to determine their reasons; to investigate the quality of materials and mixtures used in pavement structural layers of the main roads; to determine the interaction between asphalt concrete pavement composition and the quality indices of mixture materials; to study regularities of the change in pavement roughness and rut depth; to determine the interaction between the quality indices of materials used in pavement structural layers; to select two rational flexible pavement structures for the main roads (for the different traffic volume). The dissertation consists of introduction, four chapters, general conclusions, the list of references and the list of author’s publications on the topic of the dissertation, addenda. Introduction describes the studied problem, topicality of the problem, the object of research, also the aim and tasks, research methodology, scientific novelty, practical value of the results and the defended propositions. Chapter 1 gives the analysis of scientific researches made by different countries in the field of the performance of asphalt concrete pavements and their structures, duration of their... [to full text] / Disertacijos tikslas – parengti magistralinių automobilių kelių asfaltbetoninės dangos eksploatacinių rodiklių prognozės matematinius modelius, atsižvelgiant į tampriosios dangos konstrukcijos savybes ir transporto priemonių (TP) eismo intensyvumą (EI). Darbe iškelti šie svarbiausieji uždaviniai: išanalizuoti automobilių kelių asfaltbetoninės (AB) dangos eksploatacinius rodiklius lemiančius svarbiausius veiksnius ir atskleisti šių rodiklių blogėjimo priežastis; atlikti magistralinių kelių dangos konstrukcijų (KDK) sluoksniams naudojamų medžiagų kokybės rodiklių tyrimus; nustatyti AB dangos komponentinės sudėties, fizinių bei mechaninių rodiklių ir AB mišiniams naudojamų medžiagų kokybės rodiklių sietį; ištirti AB dangos lygumo ir provėžų gylio kitėjimo dėsningumus; nustatyti AB dangos, kitų (KDK) sluoksnių medžiagų kokybės rodiklių sietį; parinkti dvi racionalias magistralinių kelių tampriosios dangos konstrukcijas (skirtingam TP eismui). Disertaciją sudaro įvadas, keturi skyriai, rezultatų apibendrinimas, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašai ir priedai. Įvade aptarta tiriamoji problema, darbo aktualumas, tyrimų objektas, darbo tikslas ir uždaviniai, tyrimų metodika, darbo mokslinis naujumas, darbo rezultatų praktinė vertė ir ginamieji teiginiai. Pirmajame skyriuje išnagrinėti įvairių šalių mokslininkų atlikti automobilių kelių asfaltinės dangos bei jos konstrukcijos eksploatacinių rodiklių ir jų funkcionavimo trukmės tyrimai. Antrajame... [toliau žr. visą tekstą]

Please read the abstract in the section, 00front, of this document / Thesis (DPhil)--University of Pretoria, 2008. / Civil Engineering / unrestricted

The master thesis is focused on sorting collected primary data, their subsequent analysis and further comparison in the field of road defects. The collection of pavement failures was done by visual inspection with its recording to a computer for the pavement management system. The data later underwent detailed analysis with the aim to find a potential link between the road defect and the location of the damaged section. The study took place on 2nd and 3rd class roads in the Liberec Region, with special focus on those located near forests. The data collection itself took place in the Liberec Region in 2021. The processing and subsequent evaluation of collected data was done thanks to the availability of comparable data sets from 2014 and 2019 to 2021, so the development of road defects of the selected road network in relation to the surrounding afforestation could be assessed. The last part of this master thesis compares results in different classification levels, time periods and levels of afforestation.

No description available.