No document
Search & filter
Search for a publication
Search & filter
World Tunnelling Congress
WTCThere are 1984 documents.
-
Assessment on Tunnel Lining Due To Jack Forces Effects to Ensure Stability in Soft Ground Tunnelling
Abstract: Soft ground tunnelling is a complex problem. Ground only has little to no time gap to be left without any support, hence, tunnel lining is use to support the ground. A thick tunnel lining usually used to support the ground convergence but lead to heavy lifting and slow the construction progress. Reduction of tunnel lining thickness would shorten the time of lining installation (due to...
0,00 € -
Minimization of Compensation Measures Based on a Probabilistic Risk Simulation Concept
Abstract: Tunneling induced settlements in soft soils are almost impossible to avoid and can lead to building damages in the vicinity of such. To reduce the damage risks, cost-intensive prevention methods like jet grouting are commonly applied in practice. To reduce these measures to the essential minimum along the tunnel alignment, this paper presents a novel probabilistic risk simulation concept which...
0,00 € -
Identification of a Fine "Tuff" Lamination in the Rouse Hill Siltstone Member of the Ashfield Shale, Sydney Basin,...
Abstract: The Sydney Metro is Australia’s largest public transport project, and historical and recent ground data is being collected and used at an unprecedented scale to create robust rock models for the proposed tunnel alignments. Geotechnical investigations target the Triassic Wianamatta Group, Mittagong Formation and Hawkesbury Sandstone of the Sydney Basin. Despite these geological units being well...
0,00 € -
Criteria for Describing the Arch Effect of Weak Surrounding Rock in Super-large-section Tunnels
Abstract: A custom-made wooden excavating device with pull-out and jacking functions achieved precise control of the excavating contour and simulation of the support. In the model tests, the progressive development of the arched collapse area in the weak surrounding rock was obtained with this device when excavating a super-large-section tunnel with the double-side pilot method. In previous studies the...
0,00 € -
Potential of the newly developed High Density Support Medium (HDSM) for the application of Variable Density (VD)-TBM...
Abstract: On their first application for the Klang Valley MRT-Project in Kuala Lumpur, the Variable Density (VD)-TBMs had to bore through very karstic limestone in mixed face conditions with hard rock and soft ground. This type of TBM technology was also applied for other tunnelling projects with highly heterogeneous, very coarse and permeable ground in some instances under a high ground water level....
0,00 € -
A Case Study on Construction Technology of Large Section Horseshoe-Shaped EPB-TBM Tunnel
Abstract: Previously, mining method is usually used to construct mountain tunnel in loess strata, and shield method has no precedent. Baicheng tunnel of Menghua railway is a mountain tunnel located in loess area. Through contrastive analysis, the proposal of using a large section horseshoe-shaped EPB-TBM with multi-cutterhead to construct Baicheng tunnel was adopted. Afterwards, the TBM was developed by...
0,00 € -
Design of a Tunnel Supervisory Controller using Synthesis-Based Engineering
Abstract: Nowadays, each tunnel is equipped with a supervisory controller that ensures correct cooperation between the tunnel subsystems, such as lighting, ventilation, and emergency detection sensors. Practice has shown that traditional design methods require a lot of manual effort, which is error-prone, time consuming, and costly. Therefore, an alternative design method is explored. In this paper,...
0,00 € -
Monitoring and Characterization of Water Leakage Behavior for Aged Concrete Lining of Urban Metro Lines by Using...
Abstract: A series of laboratory tests and field measurement were conducted to monitor water leakage behaviour from cracked concrete wall for an aged subway tunnel. Tokyo Metro, operating a total of 195km of urban rail networks of which 167km is underground, regards important that water leakage behaviour be appropriately grasped over time such that periodical manual investigation and the following...
0,00 € -
Research on Vibration Characteristics of TBM Disc Cutters Based on DEM
Abstract: As a large-scale machine for rapid excavation of tunnels with complicated rock conditions and construction techniques, the tunnel boring machine (TBM) often encounters evident vibration phenomenon. This vibration is generally irregular and has many adverse effects on cutter life, advancing speed and tunneling efficiency. To study the vibration problem of TBM in excavation, the rock cutting...
0,00 € -
A Current State of Defects due to Material Degradation on Road Tunnels in Japan
Abstract: For road tunnels in Japan, the New Austrian Tunneling Method (NATM) was introduced in 1989 as a technical standard. Since then, defects on permanent lining due to external force have considerably decreased in newly-constructed tunnels. However, flaking and cracks due to material degradation are still common defects, while new-devised techniques in order to improve quality of permanent lining...
0,00 € -
Discussion on Engineering Treatment Consideration for Encountering Gas in New Wu-shan-ling Divert Water Tunnel
Abstract: Wu-shan-ling tunnel has operated more than 80 years. The state of tunnel lining deterioration could affect the original function. For maintaining the steady water supply in southern plain area, it is necessary to build New Wu-shan-ling divert water tunnel. The Wu-shan-ling tunnel is located in Nanxi District, Tainan City, between the No. 2 Zengwen Bridge and the No. 3 Zengwen Bridge on the...
0,00 € -
KOINOR - Development of a Sprayable Geopolymer Concrete for Fire Protection Improvement and Upgrading of Underground...
Abstract: The existing tunnel structures in Germany are characterised by progressive ageing, which is particularly evident in the tunnels’ inner lining. In addition, under the influence of incisive events and new research results over several years, the government has reviewed and updated some of the guidelines under which these buildings were designed and constructed. If deterioration now requires the...
0,00 € -
Risk Level Control by Geotechnical Monitoring on Different Tunnel Projects Stages
Abstract: Geotechnical risks make the most significant contribution to the level of uncertainty in making design and constructive decisions due to their nonlinear variability both in terms of area and depth, and in time. For the purposes of geotechnical risk control in time can be successfully applied tools of digital geomechanics, mathematical modelling, deep learning methods based on neural networks,...
0,00 € -
Geomechanical and Geophysical Investigations in Repaired Underground Structures
Abstract: A new approach provides increased economic efficiency of the design decisions and their subsequent implementation in repaired underground structures. The key element of the approach is the geomechanical and geophysical investigations during geological survey in the period of the design works on underground structures’ reconstruction. In particular, geomechanical and geophysical investigations...
0,00 € -
Design of a Tunnel Face Reinforcement for Underground Structures in Geological Condition of SaintPetersburg
Abstract: Tunnel face reinforcement is an effective way to ensure its stability during the construction of underground structures and in some cases to minimize deformations of soil mass. Such temporary support is used to reduce the negative impact on buildings and other engineering structures due to construction of underground subway station in St. Petersburg. The paper focuses on assessing the...
0,00 € -
Definition of Confining Pressure for Large Diameter EPB Tunnels in the Parisian Basin
Abstract: Mechanized tunnelling in dense urban environments using earth pressure balance (EPB) machines requires the application of a confining pressure at the cutter head and around the machine’s shield. This pressure is necessary to not only ensure the stability of the tunnel face but also to limit surface settlements and mitigate the impact of tunnelling on nearby buildings and infrastructure. The...
0,00 €
