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World Tunnelling Congress
WTCThere are 1984 documents.
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Estimation of geotechnical parameters by comparing monitoring data with numerical results (case study of Arash-...
Abstract: Under passing tunnels are strongly influenced by the soil around. There are some complexities in specification of real soil behaviour, owning the fact that lots of uncertainties exist in soil properties and additionally inappropriate soil constitutive model. Such mentioned factors may cause incompatible settlements in numerical analysis with the obtained values in actual construction. This...
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EPB Shield Tunnelling Through a Volcanic Chain In Mexico
Abstract: The contribution gives insight to the challenges and respective engineering measures in the MexicoToluca Interurban Train tunnel project. Each of the twin tunnels has a length of 4.7 km and is excavated with two EBP shield machines of 8.57 m diameter. The tunnel overburden varies from 1 diameter up to 130 meters and hydrostatic pressures up to approximately 6.0 bar are expected. The geology of...
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Energy Tunnel Segmental Lining: an Experimental Site in Turin Metro
Abstract: Energy geo-structures such as piles, diaphragm walls, tunnel linings and anchors are rapidly spreading in Europe and all around the world. They differ from traditional geotechnical infrastructures because they are equipped with absorber pipes. The working fluid circulating in the pipes extracts or injects heat into the ground depending on the season in order to heat or cool, respectively, the...
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Empirical correlations within TBM operation data. A case study
Abstract: Abu Hamour (Musaimeer) Surface & Ground Water Drainage Tunnel – Phase I is a 9.5km long, 3.7m ID storm water tunnel. The excavation was carried out by two Earth Pressure Balance TBMs. Monitoring of the TBM excavation processes was provided in real-time by Herrenknecht made Operation and Guidance Systems. Results of borehole re-logging and shafts wall mapping have been presented to show how they...
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Elastic surface settlement due to seepage force in tunneling below water-table
Abstract: In order to study elastic surface settlement owing to steady state seepage condition a tunnel subjected to water flow (thorough tunnel face) was considered. The relationship between surface settlement in a block of soil due to seepage force and other parameters such as soil elasticity, permeability, hydraulic head and the tunnel diameter was explored numerically. According to findings and...
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Effects of Cutter Types on Cutter Consumption and TBM Performance in Different and Complex Geological Conditions
Abstract: EPB TBMs are widely utilized for infrastructure and transportation constructions in urban areas as mechanized tunneling is cost effective, safe and rapid when compared to other conventional methods. Today, as a result of technical improvements and increasing demand, design of TBM and cutter head, thus cutter type, cutter size and cutter layout vary in a wide range from manufacturer to...
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Effectiveness of Foam Injection during Mechanized Excavation of Tunnels with TBM-EPB Technology
Abstract: In the mechanized excavation of tunnels with Tunnel Boring Machines, an ever more frequently used technique worldwide is the Earth Pressure Balance (EPB) technology; during the excavation phases this technology requires continuous injection of chemicals under the form of foam to be mixed with the excavated soil. Since the features of the foam influence significantly the excavation performances...
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Effect of Soil Conditioning on Performance of an EPB TBM: from Laboratory to Mahmutbey Mecidiyekoy Metro Tunnels in...
Abstract: The basic purpose of this study supported by the Scientific and Technological Research Council of Turkey (TUBITAK, Project No: 213M487) is to analyze the effects of soil conditioning on the field performance of an EPB TBM used for excavation of the Mahmutbey-Mecidiyekoy metro tunnels having a total length of around 18.5 km (double tube) in Istanbul. Soil samples were obtained during the...
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Saturation Techniques in Support of Pressurized Tunnels
Abstract: Types of Exposures Hyperbaric conditions allow for access to the components of tunnel boring machines which are subjected to pressure from the surrounding soils and groundwater. In relation to saturation diving, there are two distinct types of hyperbaric exposures are bounce and saturation. Bounce mode refers to a hyperbaric exposure followed immediately by decompression. In this mode, the...
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Effect of Operational Parameters on the Performance of Raise Boring Machine During Pilot Drilling
Abstract: Raise Boring Machines (RBMs) are the fast, safe and efficient drilling / boring machines are used for different purposes in mining and tunnelling especially for excavation of vertical and/or inclined shafts and drifts. The optimum raise boring system is designed or selected based on drilling / excavation performance, which depends mainly on mechanical (machine related), geological /...
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E4 Stockholm Bypass, Data Administration During the Construction Phase
Abstract: The project Stockholm Bypass is located west of Stockholm city centre to decrease the north-south road traffic through Stockholm and linking together and develop the external and regional cores. The bypass consists of more than 50 km of rock tunnels which will be constructed by using the method of drill and blast. As well of the means of this large scale and complex project and the overall...
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Development of the New Propulsion Method for Construction of a Small Section Underground Structure While Cutting the...
Abstract: This study proposes a new construction method for constructing a small section structure under railway tracks by non-open cut method.This method has the following 3 characteristics; 1) Ground surface displacement is reduced by a ground cutting wire saw in front of the cutting edge. 2) Attitude control jacks between the cutting edge and precast concrete boxes achieves detailed excavation...
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Development of new underground exploration method
Abstract: Many accidents, including sink-hole, have happened under construction because of unexpected underground utilities, despite of performing the site investigation. To solve these problems, new geophysical exploration method, different form previous ones, is developed. An electric field analysis is performed with underground utilities, the world’s first. After measuring the electrical resistance...
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Development of Deep Drainage Tunnel Systems in China
Abstract: With the rapid urbanization in China in recent years, the existing urban drainage infrastructures can no longer meet the required flood protection standard to safeguard people’s lives and properties. City inundation (termed as “waterlogging” in China) by excessive stormwater while pollution caused by combined sewer overflow (CSO) are threatening and restricting urban transformation. From 2012...
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Design and Construction of Bored Tunnels for Mumbai Metro Line 3
Abstract: This paper discusses the challenges in design and construction of the complete underground Mumbai Metro Line 3 in the city centre of Mumbai, which is the financial capital of India and home to about 22 million people. The Mumbai Metro Line 3, which is a 33.5 kilometre fully underground corridor, is presently under construction. The project scope includes 33.5 kilometre of twin tube tunnelling...
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Design of Primary lining (Diaphragm wall) at Kirtling Street Shaft for Thames Tideway Tunnel, Central Contract
Abstract: Thames Tideway Tunnel project is a new 25 km long combined sewage storage and transfer system beneath the River Thames in Central London currently under design and construction. Three design and build contracts have been awarded. The contract for the central section, the biggest and most challenging one, consists of 12.7 km of tunnel and 8 sites with deep inlet shafts and ancillary...
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