Bridge over the Vistula river in Toruń (Poland)

2019 ◽  
Author(s):  
Krzysztof Wachalski
Keyword(s):  
Horizontal Force ◽  
Original Solution ◽  
River Bank ◽  
Arch Bridge ◽  
Vistula River ◽  
Bridge Crossing ◽  
Slide Material ◽  
Structural Scale ◽  
Engineering Projects ◽  
The Eu

<p>The construction of the arch bridge in Toruń was one of the greatest and more spectacular engineering projects implemented during the recent years. In December 2013 the Poland’s largest arch bridge was completed and opened. The bridge has two spans, 270m long each, and is used as a bridge crossing over the Vistula river (Fig.1). The bridge is over 1.9 km long counting the access overbridges (viaducts). The erection procedure of the bridge was unique and individual, as the structural scale suggests. Generally, the assembly covered junction of arch elements on the assembly site near the Vistula river bank and the pontoon water transport of arch girders, which were settled on the arch abutments. A unique affordable structural solution deals with the support footing of a great number of small concrete pre-cast piles transferring a giant horizontal force into the subsoil. The steel-arch is modeled by a hingeless system without a tie, transferring horizontal force into supports. A original solution of assembly geometry control system and monitoring system was applicate to floating erection. Innovation was done of introducing material for the pot bearings, whose durability was 5-times longer than the ordinary ones. A novel slide material PTFE was used, the so-called grey teflon of improved abrasion ability. The new PTFE solutions were recently applied for the spherical bearings, but never they have been for the pot bearings. The bearings worked out an individual product specification, based on experiments conducted in the EU laboratory. The world's pioneering enterprise is application of a hundred pot bearings for the bridge and viaducts.</p>

Study on the Reinforcement and Reconstruction of through Pre-Stressed Truss Arch Bridge

2011 ◽  
Vol 90-93 ◽  
pp. 1044-1048
Author(s):  
Jun Tao Kang ◽  
Yang Liu
Keyword(s):  
Carbon Fiber ◽  
Carrying Capacity ◽  
Structure Calculation ◽  
Arch Bridge ◽  
Common Diseases ◽  
Fiber Sheet ◽  
The Common ◽  
Good For ◽  
Engineering Projects ◽  
Calculation Software

This paper takes Huzhou Baimitang Bridge as an engineering example, expounds the common diseases of through pre-stressed truss arch bridge and their causes. It uses structure calculation software to optimize the reinforcement methods of components, such as arch rib, diagonal brace, tie beam, etc. The results show that pasting steel for arch rib, diagonal brace and pasting carbon fiber sheet for tie beam can effectively enhance the stiffness and the carrying capacity of Baimitang Bridge. The reinforcing methods are good for reference of other similar engineering projects.

scholarly journals New Ashton Arch – functional assessment of direct and indirect construction costs and evaluation of service life with respect to flooding risk.

2018 ◽  
Vol 199 ◽  
pp. 06003
Author(s):  
Philip Ronné ◽  
Abe Newmark ◽  
Nadri du Toit ◽  
Heinrich van Wijk
Keyword(s):  
Service Life ◽  
Flood Damage ◽  
Local Economy ◽  
Functional Evaluation ◽  
Structural Form ◽  
Construction Costs ◽  
Improvement Project ◽  
Arch Bridge ◽  
Flooding Risk ◽  
Bridge Crossing

The bridge crossing the Cogmanskloof River in the town of Ashton, South Africa, had a history of over-topping due to severe flood events. The poor flood resilience of the bridge was aggravated by the generally hydraulically inefficient openings, the number of substructure supports in the river course, and a high debris load during flooding. The strategically important tourist route had to be closed, while localized flood damage repairs were undertaken, with resultant adverse effects on the local economy. As part of a road safety improvement project between the towns of Ashton and Montagu, improvement of the flooding resistance at the Ashton river bridge was required. This paper documents the functional evaluation of economicand technical-assessments of the flooding risks for the existing retro-fitted bridge. A new tied-arch bridge was the selected structural form of the replacement structure – based on the assessment of the key service life and constructability criteria. The structural form of the Ashton Arch paid careful regard to the scenic location and historic character of the previous multiple arch bridge form.

scholarly journals Risk Diagnosis and Management with BBN for Civil Engineering Projects during Construction and Operation

2018 ◽  
Vol 63 ◽  
pp. 00004
Author(s):  
Marian W. Kembłowski ◽  
Beata Grzyl ◽  
Agata Siemaszko ◽  
Adam Kristowski
Keyword(s):  
Civil Engineering ◽  
Expert Knowledge ◽  
Bayesian Belief Networks ◽  
Background Information ◽  
Road Tunnel ◽  
Diagnosis And Management ◽  
The Road ◽  
Vistula River ◽  
Construction Operation ◽  
Engineering Projects

The authors demonstrate how expert knowledge about the construction and operation phases combined with monitoring data can be utilized for the diagnosis and management of risks typical to large civil engineering projects. The methodology chosen for estimating the probabilities of risk elements is known as Bayesian Belief Networks (BBN). Using a BBN model one can keep on updating the risk event probabilities as the new evidence (monitoring information) becomes available. Furthermore, the updated probabilities estimated using the available data for the construction phase serve as background information for the subsequent phase. The integrated two-object model of construction-operation may be then used to optimize the decision making, thus minimizing the risks. To better show how the proposed approach works the authors use the example of the road tunnel constructed and operated under the Dead Vistula River in Gdansk.

scholarly journals Ukraine and the Republic of Moldova – Unused Potential

2018 ◽  
pp. 393-400
Author(s):  
Ivan Hnatyshyn
Keyword(s):  
Foreign Policy ◽  
Territorial Integrity ◽  
Republic Of Moldova ◽  
Bilateral Relations ◽  
National Minorities ◽  
The Status ◽  
The Republic ◽  
Bridge Crossing ◽  
Proactive Measures ◽  
The Eu

The article is dedicated to relations between Ukraine and Moldova, taking pride of place in the foreign policy of Ukraine. This is due to a shared border, large ethnic community of Ukrainians in Moldova, similarity of foreign policy priorities, and development of mutually beneficial economic cooperation. Ukraine is an active stakeholder in the negotiations on the Transnistrian conflict and has the status of a mediator. Ukraine seeks to develop mutually beneficial relations with the Republic of Moldova based upon respect for the sovereignty and territorial integrity of both states. The bilateral cooperation of the two countries can be found in the spheres of environment, transport, energy, infrastructure, implementation of domestic reforms, and efficient struggle against corruption. An opening of a border bridge crossing for vehicles and prospective construction of a bridge are the steps enabling Ukraine and Moldova to enter the European transport network. An important upshot of the diplomatic activities is the consistent support of the sovereignty and territorial integrity of Ukraine by the Republic of Moldova. The external aggression notwithstanding, Ukraine continues to take proactive measures in the negotiations on the Transnistrian conflict. The common origins of the latter and of the Russian-Ukrainian confrontation bring about the necessity to combine forces and form common approaches for their settlement as well as jointly counter regional threats and challenges. The protection of rights of national minorities is yet another important aspect of bilateral relations. Ukraine has an interest in a socially and politically stable Moldova with a prosperous economy able to follow its policy of integration to the EU. Keywords: The Republic of Moldova, policy on integration to the EU, territorial integrity, domestic reforms, corruption.

2D simulation of transport and degradation in the River Rhine

2002 ◽  
Vol 46 (6-7) ◽  
pp. 99-104
Author(s):  
L. Teichmann ◽  
P. Reuschenbach ◽  
B. Müller ◽  
H. Horn
Keyword(s):  
Mass Transport ◽  
Flow Direction ◽  
River Rhine ◽  
Exchange Coefficient ◽  
River Bank ◽  
Environmental Concentration ◽  
First Order ◽  
2D Simulation ◽  
Degradation Term ◽  
The Eu

A simple 2D model has been developed for the simulation of mass transport and degradation of substances in the river Rhine. The model describes mass transport in the flow direction with a convective and a dispersive term. Transversal transport is described by segmenting the river and formulating a transversal exchange coefficient between the segments. Degradation can be formulated with any kinetics from first order to complex enzyme kinetics. The model was verified with monitoring data from the river Rhine. The hydrodynamic parameters such as dispersion coefficients and exchange coefficients were fitted to the conductivity, which was assumed to be non-degradable. The degradation term was fitted to ammonia values. The model was used to simulate measured concentrations of a readily (Aniline) and a poorly biodegradable substance (1,4-Dioxan) 10 m from the left river bank. It was the objective of this research program to develop a model which allows a realistic estimation of the locally and regionally predicted environmental concentration of chemical substances in the EU risk assessment scheme.

scholarly journals Changes in the Standard of Living in Rural Population of Poland in the Period of the Eu Membership

2018 ◽  
Vol 10 (2) ◽  
pp. 263-279 ◽  
Author(s):  
Patryk Brambert ◽  
Iwona Kiniorska
Keyword(s):  
Rural Areas ◽  
Social Economic ◽  
Standard Of Living ◽  
Vistula River ◽  
Eu Membership ◽  
Standards Of Living ◽  
Synthetic Index ◽  
Ecological Problems ◽  
Spatial Diversification ◽  
The Eu

Abstract Polish rural areas face various social, economic and ecological problems. These processes greatly affect diversification of the standard of living in rural areas. The goal of the study was to assess spatial diversification of the standard of living in rural areas in Poland. It focused on all rural gminas as well as rural parts of rural-urban gminas. In the analysis, the standard of living was evaluated with Perkal’s synthetic index, with 12 variables concerning demographic and economic issues. The time span for the analysis was the period of 2003-2013. The highest standard of living was reported for rural areas located in the vicinity of urban agglomerations. The lowest standards of living were in typical rural gminas with poorly developed service functions. These were mainly depopulated areas from the outskirts of voivodeships. The Vistula River marked the dividing line in the standards of living in rural areas of Poland.

Swan Street Bridge Upgrade – Widening a 70-year old bridge

2021 ◽  
Author(s):  
Alistair Watson ◽  
Scott Paton ◽  
Andrew Cowell
Keyword(s):  
Reinforced Concrete ◽  
Structural Design ◽  
Central Business District ◽  
Arch Bridge ◽  
Traffic Volumes ◽  
Design Competition ◽  
Bridge Crossing ◽  
Business District ◽  
Technical Solutions ◽  
Yarra River

<p>The Swan Street Bridge is a reinforced concrete five-span arch bridge crossing the Yarra River in Melbourne, Australia. Constructed circa 1950, it provided four lanes of traffic and narrow pedestrian footpaths on both sides. The bridge forms part of a key route for vehicular access into the Central Business District, as well as pedestrian thoroughfare to the sporting and events precinct.</p><p>Substantial increases in traffic volumes meant the bridge had become a significant bottleneck and was hazardous for pedestrians. In response to this, a scheme was developed to widen the bridge – providing an additional lane of traffic and four-metre-wide Shared User Paths on both sides – all guided by an overlaying architectural vision created by the winner of a design competition.</p><p>This paper presents the structural technical solutions adopted for the strengthening and widening, which considered the original structural design, as well as the architectural intent for the widening.</p>

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