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1
Content available Supports Used in Makeshift Reconstruction of Railway Bridges
Zamiar Zenon, Surowiecki Andrzej
Logistics and Transport
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2023
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Vol. 57-58, No. 1-2
55--76
EN
The topic of the article concerns supports (abutments and pillars) used in makeshift reconstruction of railway bridges. The causes determining difficulties in the construction of supports for makeshift bridges are listed. The following supports are discussed in terms of construction and assembly technology: wooden supports (from the so-called cages, piles, frame and frame-pile, flat and flat and frame as well as wooden splines), steel (pile, frame), as well as concrete and reinforced concrete. Attention was drawn to the necessity of making attempts to use the remaining supports, or fragments of permanent supports to the greatest possible extent.
2
Content available Electrofusion Tensometry Applied to the Research of Engineering Structures
Zamiar Zenon, Surowiecki Andrzej
Logistics and Transport
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2022
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Vol. 53-54, No. 1-2
119--131
EN
The subject of the article concerns the problem of estimating the location of a slip line in a massif with a vertical retaining wall made of reinforced soil, in which the limit state of active pressure was induced. The task is solved experimentally, on the basis of measured unit strains in the reinforcement inserts, with the use of electrofusion strain gauges. The inserts are located in horizontal layers. The slip curve is formed by the points where the maximum normal stresses occur in the reinforcement inserts. This curve cuts off the fragment wedge that is being sought from the plane of the retaining wall. The slip line divides the area of the massif into two zones: active (splinter wedge) and passive, in which the reinforcement inserts are anchored. The test stand is presented, the technique of measuring the deformation of the reinforcement and the method of estimating the location of the slip surface are discussed.
3
Content available Effectiveness of road embankment reinforcement in the light of model tests on a laboratory scale
Zamiar Zenon, Surowiecki Andrzej
Logistics and Transport
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2022
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Vol. 55-56, No. 3-4
49--69
EN
The subject of the article concerns road embankments made of reinforced soil. The results of the analysis of the effectiveness of the reinforcement of these structures as a function of selected variable factors concerning the soil medium and the parameters of reinforcement inserts are given. The efficiency analysis was carried out on the basis of measurements of the horizontal unit pressure made on a physical model of a soil massif with a vertical wall of reinforced soil. The large-scale model was constructed on a laboratory scale. The article ends with a summary containing conclusions of a cognitive and practical nature.
4
Content available Research on vertical displacements of an experimental section of a railway track with a spatial mat reinforcement
Zamiar Zenon, Surowiecki Andrzej
Logistics and Transport
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2021
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Vol. 51-52, No. 3-4
179--192
EN
The subject of the article are the layers strengthening the base of the railway track, used in special cases of modernization of the main lines on the Polish State Railways. The construction of a three-dimensional reinforcing mat, also known as a "mattress", is presented. The reinforcing "mattress" is a layer of stone aggregate pre-compressed in an openwork coating made of plastic mesh. The results of the research on vertical displacements of the experimental section established in the railway track with a spatial mat embedded in the substrate are discussed. Vertical displacements were obtained as a function of time in the track subjected to the operation process.
5
Content available Technical aspects of decision-making in communication engineering
Ryczyński Jacek, Saska Piotr, Surowiecki Andrzej, Ksiądzyna Krzysztof
Scientific Journal of the Military University of Land Forces
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2020
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Vol. 52, No. 2(196)
449--467
EN
The subject of the article are problems of safety in the operation of earth structures designed for vehicle traffic in the conditions of threats of loss of stability. In particular, the following issues were discussed: design and construction of embankments on weak, marshy soil, safety of earth structures in floodplains, safety of earth structures in landslide areas, earth structures located in areas of mining damage. Examples of solutions to particular problems are given. The summary contains statements of utilitarian and cognitive significance.
PL
Tematem artykułu są problemy bezpieczeństwa eksploatacji komunikacyjnych budowli ziemnych w warunkach zagrożeń utraty stateczności. W szczególności omówiono następujące zagadnienia dotyczące: projektowania i budowy nasypów na słabym podłożu bagnistym, bezpieczeństwa budowli ziemnych na terenach zalewowych, bezpieczeństwa budowli ziemnych na terenach osuwiskowych, budowli ziemnych zlokalizowanych na terenach szkód górniczych. Podano przykłady rozwiązania poszczególnych problemów. Podsumowanie zawiera stwierdzenia o znaczeniu utylitarnym i poznawczym.
6
Content available Selected safety issues in designing engineering structures
Ryczyński Jacek, Saska Piotr, Surowiecki Andrzej, Ksiądzyna Krzysztof
Scientific Journal of the Military University of Land Forces
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2020
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Vol. 52, No. 1(195)
135--153
EN
The article discusses the safety requirements specified in pertinent standards and recommendations for designing civil engineering objects, with particular emphasis on earth structures intended for vehicle traffic. The focus was on the following issues: the essence of reliability and durability of the structure and ensuring safety at the stage of designing vehicle traffic embankments with a slope supported with the use of a retaining wall and embankments placed on a substrate characterized by insufficient bearing capacity. The procedure for designing traffic embankments on weak ground, reinforcing weak ground and designing retaining structures (on the example of a reinforced soil massif) was carried out in accordance with the calculations pertaining to the field of geo-engineering, applying general analytical dependencies.
PL
Tematem artykułu są wymogi bezpieczeństwa podane w normach i zaleceniach projektowania obiektów inżynierii lądowej, ze szczególnym uwzględnieniem komunikacyjnych budowli ziemnych. Uwagę skupiono na zagadnieniach dotyczących: istoty niezawodności i trwałości konstrukcji oraz zapewnienia bezpieczeństwa na etapie projektowania nasypów komunikacyjnych ze skarpą podpartą z zastosowaniem ściany oporowej, a także nasypów posadowionych na podłożu o niedostatecznej nośności. Procedurę postępowania dotyczącą projektowania nasypów komunikacyjnych na słabym podłożu, wzmacniania słabego podłoża oraz projektowania konstrukcji oporowych (na przykładzie masywu z gruntu zbrojonego) przeprowadzono zgodnie z obowiązującymi w geoinżynierii obliczeniami, z wykorzystaniem ogólnych zależnościach analitycznych.
7
Content available Traffic infrastructure in mining areas (selected problems)
Surowiecki Andrzej, Saska Piotr, Ksiadzyna Krzysztof, Ryczynski Jacek
Scientific Journal of the Military University of Land Forces
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2019
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Vol. 51, No. 3(193)
558--578
EN
The article discusses the issues of safety of operation of road and rail transport infrastructure objects in mining areas. In particular, the following issues were discussed: the general characteristics of the mining deformations of the rock mass and the terrain surface, the impact of continuous and discontinuous deformations on the safety of the operation of land transport infrastructure facilities and reinforcements of land transport infrastructure structures in mining areas. Examples of land transport structure reinforcements situated within the reach of mining influences are given.
PL
Tematem artykułu są problemy bezpieczeństwa eksploatacji obiektów infrastruktury transportu drogowego i kolejowego na terenach górniczych. W szczególności omówiono zagadnienia dotyczące: ogólnej charakterystyki górniczych deformacji górotworu i powierzchni terenu, wpływu deformacji ciągłych i nieciągłych na zagrożenie bezpieczeństwa funkcjonowania obiektów infrastruktury transportu lądowego oraz wzmocnienia budowli infrastruktury transportu lądowego na terenach górniczych. Podano przykłady wzmocnienia budowli transportu lądowego, znajdujących się w zasięgu wpływów górniczych.
8
Content available Ways of Eliminating the Road Effect in Transition Zones from the Railway Track to Bridge Structures
Zamiar Zenon, Surowiecki Andrzej, Saska Piotr
Logistics and Transport
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2019
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Vol. 44, No. 4
85--94
EN
Selected methods of constructing special inserts in the transition zones between the embankment of the railway track and the engineering object (bridge, viaduct, or culvert) were discussed. The purpose of mounting the designed inserts is to eliminate the so-called threshold effect, i.e. continuously creating a mild change in the stiffness of the ground under the track. In addition to the solutions presented in practice, attention was also paid to projects developed by the authors of this article. The results of experimental research constituting the basis for the development of some solutions are also given.
9
Content available The Analysis of the Stability of the Communication Support Stabilized by Gabion Wall with Variable Configuration
Zamiar Zenon, Surowiecki Andrzej, Saska Piotr, Balawejder Adam
Logistics and Transport
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2019
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Vol. 42, No. 2
109--116
EN
The subject of the article concerns the stabilization of communication earthworks using the so-called lightweight retaining structures. The stability of the embankment with the embankment built with the gabion wall is analysed, assuming a uniformly distributed load on the crown and a case of unilateral water pressure in the event of a flood. Final results of stability calculations made with the Fellenius and Bishop method in the form of slip surface with the smallest value of the coefficient were presented.Then, assuming the case of damming up of flood water, discretization of the filtration area, velocity distribution and hydrodynamic grating and slip surfaces were developed. The variable parameter is the wall configuration.
10
Content available Parameter of Cooperation of Composite Components in Views about Vertical Wall from Reinforced Soil
Zamiar Zenon, Surowiecki Andrzej, Saska Piotr
Logistics and Transport
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2019
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Vol. 44, No. 4
77--84
EN
The publication considers reinforced soil in relation to the construction of retaining walls in communication construction. The basic elements determining the cooperation of reinforcement inserts with the ground centre are discussed, depending on the features characterizing the components of the composite. The method and selected results of tests performed on a massif model with a vertical wall made of non-cohesive ground have been presented. A calculation example is given concerning the internal dimensioning of the reinforcement of the considered massif model, assuming the work of inserts without slipping in the ground centre. The concept of reinforcement co-operation indicator with the ground centre was introduced and a dependence to calculate its value was developed. The values of co-operation indicators: general and partial, concerning individual measurement levels of the model have been presented appropriately.
11
Content available Model Studies of Distortion Condition Resistance Wall from Gabionic Elements
Zamiar Zenon, Surowiecki Andrzej, Saska Piotr
Logistics and Transport
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2019
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Vol. 43, No. 3
47--55
EN
Retaining walls have been classified and characterized as structures protecting road or railway embankments against landslides. Particular attention was focused on retaining structures classified as light [1-3, 5-12, 14-24], which include, among others, walls made of gabions. Physical models of the gabion retaining wall, prepared on a laboratory scale, test stand and how to perform spatial deformation tests are presented. The models differed in the number and dimensions of gabions. On the basis of measured horizontal deformations of embankment models with a gabion wall, which were subjected to vertical static pressure at the level of the embankment ceiling, the values of basic strength parameters were determined. In particular, the value calculated: horizontal pressure coefficient, shear strength and modulus of deformation. The variability of the values of these parameters was estimated as a function of variable factors related to the gabion wall configuration (determined by the number and dimensions of gabions) and the value of the external load test.
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