No document
Search & filter
Search for a publication
Search & filter
Papers from WTC and ITA conferences have been made available as PDF documents.
ProceedingsThere are 1984 documents.
List of endorsed conferences
-
WTC
World Tunnelling Congress
-
The use of GFRP reinforcing elements and the mechanized excavation method
Abstract: This article explains the use of GFRP elements in the field of tunnels construction with TBM tunnelling and in particular, the execution of lining with precast segments. In this context, the use of GFRP bars and nets could replace totally the traditional steel reinforcement or constitute strengthening components to overlap steel armature. The use of precast reinforced segments with fiberglass...
0,00 € -
The role of underground transportation inside Milano’s Smart City perspective
Abstract: Making a Smart City out of a city is a complex process involving deep-rooted innovation with regard to: tangible and intangible infrastructures, the lifestyles of citizens; the regeneration and design of public spaces, strategies and tools to develop the economy and the handling of complexities. Public administration on its own cannot transform a city into a smart city, but it does have the...
0,00 € -
The opportunities available by using BIM in Norconsult
Abstract: BIM is a common word in the industry today, this paper will focus on the “I” in BIM. With object information you can connect any information available to the model. The first topic I will address is the linking between the bill of quantities and the BIMmodel. With this link, the quantities are extracted from the model instead of being typed in to the contract. The object information can be...
0,00 € -
The log-spiral torus geometry as shallow tunnel face collapse mechanism: a general-stability safety factor approach
Abstract: During soil tunnel excavation with a TBM, either Slurry-Shield or Earth Pressure Balance type, it is of utmost importance assess the pressure to be exerted on the face to ensure both the stability of the excavation and control surface settlements. In literature, there are reported mostly 2D or even 3D global stability proposals that do not accomplish kinematic constraints, that is, from a...
0,00 € -
The life cycle greenhouse gas emission paths and emission factor database of Chinese tunnels
Abstract: Tunnel is the traffic facility with high-density greenhouse gas (GHG) emission. With the booming development of Chinese tunnelling industry, a large number of energies, building materials and human sources are consumed. Various GHG and wastes are discharged into the natural environment. However, only few GHG emission researches about Chinese tunnels existed. No life cycle GHG emission paths or...
0,00 € -
The key role of underground infrastructures in the recent transformation of the city of Bilbao
Abstract: The urban transformation of Bilbao in the last thirty years has been exemplary, shifting from an industrial city to a friendly city based on culture and services. This internationally recognised success (Bilbao has recently been named European City of the Year at the 2018 Urbanism Awards) can be explained by a coordinated and multidisciplinary collaboration from very diverse spheres that have...
0,00 € -
The influence of over consolidation ratio on the mechanical behavior of conventional shallow over burden tunnel
Abstract: Until the recent past, the open-cut method had usually been applied for excavating shallow overburden tunnels in unconsolidated grounds. The conventional tunneling method [the New Austrian Tunneling Method (NATM)] had been thought to be suitable for excavating tunnels in mountainous terrains. However, recent advancements in construction and measurement techniques have enlarged the range in...
0,00 € -
Test methods for the quality control of fiber reinforced concrete in tunnels and under ground construction
Abstract: Fiber reinforced concrete (FRC) is widely used as temporary support and permanent lining in tunnels and other underground constructions as mining projects around the world. In segmental lining for tunnels, adding structural fibers improves the response of the structure during construction, particularly when subjected to the thrust of the jacks during the placement, and also reduces the global...
0,00 € -
TBM Performance Analysis in Xe-Pian Xe-Namnoy Project
Abstract: This study tries to present the correlation between penetration rate, thrust force and ground conditions with the excavation data from the Xe-Pian Xe-Namnoy hydro power project in Laos. The double shield machine is applied for the excavation of 11.5km length and 5.74m diameter headrace tunnel. The TBM operational performance is analyzed with correlating penetration, thrust force with RMR along...
0,00 € -
Interaction Between Three-Arch Tunnel Construction and Pile Supported Bridge
Abstract: The present study presents the results of laboratory model tests to check the effect of 2-Arch tunnel construction on a pile supported bridge. A series of reduced scale model tests were carried out in the laboratory using a model reduced from a prototype tunnel case. The main focus of the test is to identify fundamental governing interaction mechanism of between the 2-Arch tunnel and the...
0,00 € -
Method for water inflow rate estimation from sample measurements of surface flows on tunnel walls Mexico:...
Abstract: National Institute for Land and Infrastructure Management is carrying out an examination into strategically maintain and renovate in the future of highway structures which are an important social capital. This report summarises the results of periodic inspection of road tunnels that under jurisdiction of the central government which was implemented in fscal years 2014 and 2015 by the ‘The...
0,00 € -
Sulfate resistance and phase composition of modern shotcrete
Abstract: In tunnel applications spraying of concrete is a well-established and economical alternative to con-ventional casting techniques. Shotcrete often is in direct contact with aggressive tunnel water i.e. sulfate-bearing groundwater. The special application technique and material composition with rela-tively small aggregate size, high paste volume as well as the addition of large amounts of...
0,00 € -
Study on the Piston Wind in the Tunnel Generated by a Train with Fire Speeding to a Rescue Station
Abstract: A 3-D dynamic mesh model of a train with fire speeding to a rescue station was built in FLUENT software of CFD series. This paper has researched the change of the piston wind on cross sections in different positions of the tunnel and rescue station when a train runs and stops in the rescue station with different states (uniform motion, decelerated motion and stationary state). The results show,...
0,00 € -
Study on quick excavation and support method of Expressway Tunnel with 8 lanes in limestone formation
Abstract: Jiangshuiquan tunnel, which is 8 lane tunnel with double holes, approximately 3100m in length, 170 to 207 square meters in excavation area, and 80km/h in the design speed, is located in Beijing-shanghai high-speed expressway. In consideration of large scale and tight schedule, a new excavation method named as ”steel-rock wall combined supporting method” is proposed, which is on the basis of CD...
0,00 € -
Study of the evaluation method on tunnel lining clack progress
Abstract: Nippon Expressway Company Limited (NEXCO)’s tunnel lining detailed inspection system carries out desk checking of the image photographing records of lining surfaces from the inspection image acquisition system and is made up of a combination of desk checking extracting important inspection points as well as implementation checks by an engineer. Both inspections evaluate Tunnel-lining Crack...
0,00 € -
Structural design calculation tool of Steel Fiber Reinforced Concrete (SFRC) segmental lining
Abstract: Segmental lining for a tunnel support system, for a shield on a tunnel boring machine (TBM) refers to the precast segments built in a pre-cast concrete manufacturing facility. Although steel fibers have been used in many tunnels worldwide, for most precast tunnel segment designs, rebar is still used for reinforcement mainly. The labor and material costs make up a large part of the manufacturing...
0,00 €
