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    Wyświetlanie 1-6 z 6
    Tytuł:
    Nośności żużlowych i żwirowych nawierzchni dróg leśnych
    Carrying capacity of slag and gravel forest road pavements
    Autorzy:
    Trzciński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1016190.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    nosnosc
    nawierzchnie zuzlowe
    nawierzchnie zwirowe
    lesnictwo
    drogi lesne
    podloza
    forest road
    road carrying capacity
    pavement deflection
    gravel pavement
    slag pavement
    Opis:
    The objective of the study was to estimate the carrying capacity of forest roads with slag and gravel pavements. Deformation module and elastic deflection were used as characteristic parameters of road carrying capacity. There were established 12 tested sections divided in groups. All investigated sections were measured using VSS plate (38 measurements) and deflectometer (65 measurements). Averaged results of the measurements from the particular pavements were introduced in analysis. The present study proved that carrying capacity of slag and gravel pavements defined according to mean module ME is insufficient. The largest (145.48 MPa) mean deformation module was detained for slag pavement.
    Źródło:
    Sylwan; 2007, 151, 07; 49-57
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie opisów glebowych zawartych w operacie urządzenia lasu w planowaniu sieci dróg leśnych
    Using soil descriptions from the forest management plans in forest road network planning
    Autorzy:
    Gołąb, J.
    Plewniak, J.
    Słowik-Opoka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/989808.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drogi lesne
    siec drogowa
    planowanie
    tereny lesne
    badania gleboznawcze
    operat urzadzeniowy
    wykorzystanie
    forest road network
    forest management plan
    soil characteristics
    suitability for building
    Opis:
    The paper analyses the possibilities of using the forest soil descriptions included in the forest management plan to draw up an initial characterization of the area in terms of their usefulness for the forest road building. That kind of data may be used in the planning of forest road network in preliminary location concept of road sections. Knowledge in the subject of the spatial distribution of ground with specific physical properties enables us to offer such options, that are likely to ensure the stability of built facilities and also lower costs of implementation and operating as well as reduce the environmental costs of the investment. The paper shows the possibilities and ways to determine the basic characteristics of the ground, such as: the type of ground, filtration coefficient and vulnerability to frost heave. Forest soil descriptions based on macroscopic studies should be regarded as insufficient. Use of the soil data is possible and gives the desired effect only when the results of the grain size analysis can be used. On the basis of these data, classification of the ground can be performed and one can determine the basic indicators of the suitability of the tested materials. We used twelve soil samples with the diverse texture (10−89% sand, 7−83% silt and 4−29% clay). On the basis of complete pedological data collected in accordance with the recommendations of the Forest Management Instruction, it was possible to classify the material in terms of engineering and calculation of relevant indicators and characteristics. It should be noted that this is the initial characteristics of the soil and as such it is not a substitute for detailed research required for the execution stage of the project of specific road sections.
    Źródło:
    Sylwan; 2015, 159, 06; 461-468
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena stanu nawierzchni leśnej drogi tłuczniowej w Puszczy Noteckiej po dwuletnim okresie eksploatacji
    Assessment of the state of the macadam forest road in the Notecka Forest after two years of exploitation
    Autorzy:
    Kamiński, B.
    Czerniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026439.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    inzynieria lesna
    nosnosc
    nawierzchnie drogowe
    Puszcza Notecka
    lesnictwo
    drogi lesne
    drogi tluczniowe
    forest road
    macadam pavement
    bearing capacity
    pavement deflection
    Opis:
    The objective of the studies was to assess the bearing capacity of macadam forest roads made from ungraded crushed stone and two−layered macadam depending on earth−water conditions of the subgrade. The effect of the synthetic reinforcement of natural subgrade on the bearing capacity was also examined. Deflection in the road pavement after a two−year period of exploitation was assessed. The size of deflection was compared with the deflection module and the type of the subgrade and materials used for road construction were analysed
    Źródło:
    Sylwan; 2003, 147, 06; 14-21
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Funkcjonalność połączeń dróg leśnych z drogami publicznymi i innymi drogami wewnętrznymi
    Functionality of the connections of forest roads with public and other internal roads
    Autorzy:
    Trzciński, G.
    Młynarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/979571.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    nadlesnictwa
    uklad komunikacyjny
    drogi lesne
    drogi publiczne
    drogi wewnetrzne
    polaczenia drog
    funkcjonalnosc
    public roads
    forest area
    internal road
    roads exit
    roads junction
    Opis:
    The forestry communication system is included in larger transport areas through forest roads connections mainly with public roads, but also with internal ones. The possibility of realization of these connections and defining their technical parameters is very important, as it concerns the cooperation of various property owners as well as interference of the State Forest units into other land (road lane). The aim of the research was to analyse the exits, i.e. connections of forest roads with public or other internal roads, necessary to ensure the functioning of the communication system of the forest district. We investigated existing as well as the planned to be built exits. The research was carried out based on the developed information sheet regarding the scale and scope of issues related to the operation of the exits. We received back 412 information sheets and analysed the data according to the category of the road and the regional directorates of the State Forests (RDSFs). The total number of functioning exits the State Forests equals 108,239. The exits number varies from 2505 in RDSF Piła to 12,341 in RDSF Olsztyn and depends on the number of forest districts and their area, which is confirmed by the high number of exits in RDSF Bialystok, Szczecin and Wroclaw (tab. 1). The highest number of exits (53,455) was found for junctions with commune roads, and then district roads (31,190). A large number of exits (8111) was recorded for roads that do not have the status of a public road. More than a half of the surveyed forest districts (262) demonstrated the need to build 9072 new exits from various road categories, indicating primarily exits from communal roads and district roads (tab. 2). No need of building the exits to national roads was exhibited by 320 forest districts, and by 253 units for regional, 183 for district and 211 for communal roads.
    Źródło:
    Sylwan; 2019, 163, 10; 862-871
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioindykacja leśnych stref ekotonowych w zasięgu oddziaływania dróg cementowo-gruntowych na podstawie cech fizycznych igieł sosny zwyczajnej (Pinus sylvestris L.)
    Bioindication of forest ecotonal zones within the impact of cement-ground roads on the basis physical properties of Scots pine [Pinus sylvestris L.] needles
    Autorzy:
    Czerniak, A.
    Kayzer, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018549.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drogi cementowo-gruntowe
    oddzialywanie na srodowisko
    wlasciwosci fizyczne
    lesnictwo
    drogi lesne
    bioindykacja
    zawartosc metali ciezkich
    Pinus sylvestris
    igly sosny
    sosna zwyczajna
    ekotony
    bioindykatory
    drzewa lesne
    forest
    road
    heavy metals
    leaching
    assimilatory apparatus
    Opis:
    The obtained results allow, with high degree of likelihood, to state that chemical compounds leached from the cement−soil road did not affect the length and mass of pine needles sampled from trees growing in the neighbourhood of road sections stabilised by different cement types. The analysed physical parameters of needles collected from trees growing in the neighbourhood of cement−stabilised road sections did not significantly differ from the physical parameters collected from trees growing in the neighbourhood of the non−stabilised control section.
    Źródło:
    Sylwan; 2006, 150, 05; 59-67
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ efektu brzegowego drogi na cechy drzewostanów sosnowych Puszczy Noteckiej
    Edge-effect of the road on the Scots pine stands characteristics in the Notecka Forest
    Autorzy:
    Grajewski, S.M.
    Mizera, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989417.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Notecka
    drogi publiczne
    drogi o malym natezeniu ruchu
    oddzialywanie na srodowisko
    efekt brzegowy
    drzewostany sosnowe
    cechy taksacyjne
    zasobnosc drzewostanu
    miazszosc drzew
    road−edge effect
    diameter at breast height
    growing stock
    forest stand value
    very low−volume roads
    Opis:
    The development of the transportation network brings both benefits and threats. Much attention is paid to soil contamination with trace elements, difficulties in animal migration, noise propagation or synanthropisation of the vegetation cover. This paper deals with the effect of provincial road No. 150 on inventory characteristics of neighboring Scots pine stands in the Notecka Forest (western Poland) – one of the larger forest complexes in Europe. Twelve rectangular experimental sites were established perpendicular to the road axis, called belt transects. Each transect consisted of 3−4 plots located at different distances from the pavement edge (fig.). Measurements and estimations were recorded for the plots. Values from all belt transects were approximated within plots at the same distance from the road and then compared using statistical methods. Observations were conducted in Scots pine stands growing on fresh coniferous forest (Bśw) and fresh mixed coniferous forest (BMśw) sites. Reduced stand density that resulted in decreased basal area, volume and growth rates were observed in the immediate vicinity of the road compared to the forest interior. Individual trees were thicker, but more often burdened with defects decreasing timber value. Any considerable effect of the road on tree height wasn't observed. The above mentioned changes were more evident in poorer habitat conditions, while the location in relation to the road had no significant effect. Modified lighting conditions are probably the main cause of these changes. At the edge of Scots pine stands in the Notecka Forest, a unique ecotone has formed under the influence of the provincial road.
    Źródło:
    Sylwan; 2016, 160, 11; 915-922
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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