No document
Search & filter
Search for a publication
Search & filter
World Tunnelling Congress
WTCThere are 1984 documents.
-
Developmentof AI crack detection system for alertagainst tunnel face collapse
Abstract: Since the collapse time after cracks occur on a shotcrete surface of a tunnel face is very short. The evacuation time from the collapse of the tunnel face is limited. Therefore, to prevent disasters, AI image analysis can be effectively used to quickly recognize cracks and raise alarm. However, it is difficult to detect only on-site cracks. Therefore, we examined an AI model that can avoid...
0,00 € -
Digital construction: Data Management in mechanized tunnelling
Abstract: Tunnel boring machine intelligence and the connectivity of IT systems have increased considerably in recent years. The introduction of BIM and numerous independent construction company platforms have steadily digitalized operations of all project participants, with professional data management now as essential part of successful process management. Whilst quick access to machine operator...
0,00 € -
Digital parametrised ground model in tunnelling - concept and sample application
Abstract: In order to develop a new concept for the future implementation of a digital parametrised ground model in all project phases of tunnel construction to its full extent, the current geotechnical planning process in tunnelling was subject of a basic evaluation. With a sample application, it was possible to show in a first step what can already be done today and valuable experience was gained and...
0,00 € -
Digital Twins for the Validation of Road Tunnel Controllers
Abstract: In the development of road tunnels, the design of a correct and safe supervisory controller is a crucial task. Such a controller is responsible for the proper cooperation between tunnel components, especially during emergencies. An important step in the design of a controller is validating that it functions correctly. One of the most prominent validation methods is simulation. Here, the...
0,00 € -
Digitalization and defects analysis for the maintenance of mechanized tunnels
Abstract: The planning and the management of existing infrastructures (and tunnels) is already a central challenge for industrialized countries in order to manage heritage and strategic infrastructures ensuring a sustainable and resilient asset. In the last years, a larger amount of the tunnel industry follows the lead of the mechanized excavation method and the issue for the management and the...
0,00 € -
Disassembly in Mechanised Headrace Tunnel for the Uma Oya Project, Sri Lanka
Abstract: The breakthrough of the Headrace tunnel in the Uma Oya project done on October 2019, which face a lot of challenges and unforeseeable conditions of 15.4 km. The tunnel excavated by 2 hard rock double shield TBMs which excavated upward & downward without any middle access. One of the TBMs excavated more than 10 km upward and the other one excavated remains parts downward. The plan and location...
0,00 € -
Discussion on Whether It Is All owed to Change Lanes in High way Tunnels
Abstract: Vehicle lane changes are prohibited in highway tunnels in order to reduce traffic safety risks in China. Problems such as slow trucks affect traffic efficiency, the following vehicle forcibly changing lanes, have gradually appeared. On the premise of not increasing the risk of traffic accidents, focused on the ideas, methods and requirements for the demonstration of whether lanes can be changed...
0,00 € -
Dispersion of traffic emissions around tunnel portals
Abstract: The accumulation of vehicle emissions over the length of a tunnel may lead to pollutant concentrations around the portals exceeding the threshold values - especially in an urban environment. This paper will describe how CFD-simulations can be used to give a detailed insight into the dispersion and dilution of traffic-related pollutants accounting for multiple wind directions and speed....
0,00 € -
Driving Multidisciplinary Change in Tunnelling through a BIM Open Standard
Abstract: Tunnelling industry is currently in a phase of deep change of paradigm thanks to widespread use of BIM digital twins, from design to Operations & Maintenance phases. This transition has to be intended as the fundamental step to achieve the complete digital integrated design of infrastructures. Authors propose a structured and coordinated design framework, covering all the involved specialties...
0,00 € -
Dubai’s 10km x 10m Storm Water Tunnel - Durability in an Aggressive Environment
Abstract: Dubai Municipality’s Deep Tunnel Storm Water System is a long-term catchment-wide plan for capturing and conveying storm water and groundwater flows for a service area of about 500 km2. Rising highly saline ground water levels in Dubai is increasingly an area of concern and the tunnel system will relieve groundwater 95 per cent of the year, besides managing the rare storm events. The tunnel at...
0,00 € -
Early Information of Ground Conditions with SSP -E in TBM Tunnelling
Abstract: In order to monitor the ground conditions ahead of a TBM while tunnelling, there is a need for systems that are co-working smoothly with the TBM. Sonic Softground Probing for Earth Pressure Balance Shield machines (SSP-E) is capable of early detecting obstacles relevant for TBM tunnelling and thus enables responsible persons on construction sites to react in a timely and plannable manner to...
0,00 € -
Earth Pressure Balance (EPB) TBM excavation the case of Serravalle tunnel (Terzo
Abstract: Earth Pressure Balance (EPB) TBMs are able to deal with the main issues in urban tunnelling that include surface settlement control, maintaining of the existing structures requirements and stability of the excavation face. Tunnels of several kilometres can also include quite different conditions along the tunnel alignment in terms of rock / soil characteristics, groundwater and overburden. In...
0,00 € -
Economic feasibility study for the use of fire protection boards in road tunnels
Abstract: Fires in a tunnel can cause considerable damage to the structure, resulting in the tunnel being closed for refurbishment works, at times for many months. Such closures always have an additional and sometimes a very negative effect, because tunnels generally have a special role in the surrounding transport infrastructure (bottleneck). As a result, diversion routes are overloaded with unplanned...
0,00 € -
Effect of cutterhead on performance of EPBM in mixed face condition
Abstract: The type of cutting tools installed on the cutterhead, the position and ratio of openings have a significant effect on the performance and efficiency of EPBM machines. A 5.4 km length of the first line of Isfahan metro project was excavated using two EPBMs over a four-year period. After completion of the tunnels, an assessment was carried out of the performance of the machine when excavating in...
0,00 € -
Effectiveness of Countermeasures against Earth Pressure of Mountain Railway
Abstract: ABSTRACT: Mountain tunnels are sometimes subject to deformation caused by post-construction earth pressure. Defects such as cracks, or deformation of tunnel lining may occur depending on the structural properties of the tunnel or surrounding geological characteristics. In such cases, countermeasures for tunnels in service need to be carried out against earth pressure. This paper outlines the...
0,00 € -
Effects of Soil Conditioning on Ground Control and Performance of EPB Shield
Abstract: Earth pressure balance (EPB) machines are designed for the construction of tunnels in soft grounds. These machines use the excavated soil in a pressurised chamber to apply a support pressure to the tunnel face. If the support pressure is not constant, the varying pressure inevitably leads to collapse of the ground. Effective soil conditioning significantly improves ground control and machine...
0,00 €
