Multidisciplinary design optimization of tunnel boring machine. Shield tunnel boring machine tbm, highlighting the use of detailed geotechnical. The tunneling geological profile was a mixture of soil and bed rock, which required a slurry type of tbm machine equipped with 1200kw cutter head drive power, a first machine of this type in india, to meet such challenge. Below is an example of a tunnel boring machines which is equipped with a back hoe whilst the cutting head has been a breakthrough on soft material the shield with a. They can be designed to bore through anything from hard rock to sand. The paper provides an insight into the design and tender of the more than km long wienerwald railway tunnel in austria. The project comprises a double track tunnel section. Analysis, design, and construction of tunnels and underground.
Contractor, in agreement with the client, to consider the use of a tbm. Tbm tunnel boring machine tunnel boring machine tbm is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. Technical considerations for tbm tunneling for mining projects. Tunnel boring machines advanced design tbms are essential for the construction of hs2. Atunnel boring machine tbm is a machine used to excavate tunnel with a circular cross section under a variety of geologicalconditions.
Recommendations for the design, production and installation of segmental rings 10. Tbm cost and performance, and to provide commentary on existing design guidelines to optimize lining and tbm procurement. Tunnel boring machines tbms have been used for the construction of. A tunnel construction is an underground passage provided beneath earth surface or water. This paper presents comprehensive experimental test results on the behavior of the reinforced concrete rc and the steel fiber reinforced concrete sfrc shield tbm tunnel boring machine tunnel lining segments and the lining rings exposed to a hc hydrocarbon curve. The tbm was built by herrenknecht in germany and is currently. The tunnel costs were estimated using tbm cost estimating software and cost database developed by hatch mott macdonald. Individual tunnel comparisons of six recent urban, tbm bored, rail projects supported the conclusion that tunnelling is. They can bore through anything from hard rock to sand. Risk management associated to design and construction of tbm tunnel linings with precast segments. Pdf considerations of new approaches for tbm tunnel design. Multidisciplinary design optimization of tunnel boring machine 1075. The work described in this document was conducted as part of nchrp project 2068a, the u. Selection of earth pressure balance or slurry pressure balance tunnel boring machines.
Introduction high speed two hs2 is the governments proposal for a new, high speed. It is not necessary to perform mechanical or manual scaling, hence tsc is 0. A tbm exit shaft was constructed on granville south of dunsmuir to extract the tbm. Although this decision involves a longer startup period before construction of the underground tunnel can commence in terms of design, construction, transport and assembly of the.
New design approaches for tbm tunnels, threedimensional finite element analyses of a tbm tunnel, where ed. The assumed rates of progress for tunnel construction are expressed as a long average in metres per week. Tunnel diameters shown are nominal internal or finished diameters. Introduction to tunnel design and construction seminar instructor david g. As a result, along initial 100m section of the uptrack tunnel, only 9 ground settlement points could be installed above tunnel crown. Design and construction of cross passages at the storebcelt. Tunin the tunnelling industry, the prediction of tbm performance and costs is an important issue for planning and risk management at the design stages. Development of the esf may include the excavation of over 15 km 9. Engineering survey system for tbm tunnel boring machine. Figure 1 shows the longitudinal cross section of the lake mead intake tunnel project.
Tunnel boring machine an overview sciencedirect topics. The criteria for rock tunnels are to be determined on a project specific basis, subject to wssc approval. Appendix d contains output from the software for each tbm type and tunnel diameter. Pdf development of new approaches for tbm tunnel design. Tbm is a machine used to excavate tunnel with a circular cross section under a variety of. Selection of shield method depends on ground conditions, surface conditions, dimensions of the tunnel section, boring distance, tunnel. The design, sizing and construction of precast concrete. The bored tunnels were constructed using four earth pressure balance tbms supplied by james howden and company. In the current paragraph, the principles for designing a metro tunnel constructed with tunnel boring shield machine earth pressure balance epbtbm will be discussed, and the main design phases will be explained in detail. The david sugden young engineers writing award 2017 the. Risk management associated to desing and construction of t. As the name suggests, the project aims at the study of the tunnel boring machine and by using its basic idea to design a prototype of tunnel boring machine. This is defined as the total length of tunnel divided by the total estimated period of construction from the start of boring using the tunnel boring machine.
The design of underground works has traditionally followed a deterministic approach, based on indirect. Tunnels constructed with tbm tend to be slightly higher in cost than those constructed with conventional construction. Varying ground conditions and high water pressures can be seen on the sketch and has been a mayor task during the execution of the tunneling works. Our goal was to identify key cost drivers, compare international. Construction of tunnels has much progressed over the last decades regarding methods, technology and materials in both the tbm and the tunnel lining. Tunnel boring machine tbm tunneling the subsequent pages of this constructability study are organized as follows. However, the tunnel boring machine was never put into operation on a real tunnel project. Appendix d tbm tunnel assumptions and cost estimating output. Introduction the conventional project setup for tunnel lining design and the design and manufacture of the tunnel boring machine tbm should be coordinated in a timelier manner. Practical understanding, with some on site experience. With the lowering of tbm costs, and the increase in the inventory of available used machines, however, the actual minimum length of tunnel on which it is economically feasible to use a tbm has decreased over the years. Zublin ag is involved as designer and contractor, are presented in this paper. Tunnels constructed with tbm tend to be slightly higher in cost than those constructed with conventional construction methods. Analysing international tunnel costs an interactive qualifying project nathaniel efron, megan read.
Build contractor is excavating twin tunnels, connecting watson island and dodge island in the city of miami, using a tunnel boring machine tbm specifically designed for the port of miami tunnel s geology. Erik eberhardt tunnel excavation in soft ground conditions. Reporting to the head of section and project manager you will be a key member of the design team for their current largescale metro projects in the middle east and vietnam. A tbm is a system that provides thrust, torque, rotational stability, muck transport, steering, ventilation, and ground support. Da ub recommendations for the design, production and installation of segmental rings 10. Nonetheless it has to be considered that the costefficiency of each construction method depends on the conditions of the ground as well as on project design features. Durability design of tunnel liners tunneling short course. Recommendations for the design, production and installation. Predicting the performance of tunnel boring machines tbm is easy when the forces required in the cutting discs to fragment rock are known. The design involved two vertically stacked tunnels along cambie st. All other tunnel structures of the western part and the double track tunnel of the eastern section of the project will be carried out by conventional tunneling method. Multidisciplinary design optimization of tunnel boring.
Introduction high speed two hs2 is the governments proposal for a new, high speed northsouth railway. Section 2 describes the project sites existing conditions, including the geotechnical findings and information reported in the 2010 deir. Figure shown is a sketch of a typical open or unshielded tbm designed for operation in hard rock. Phase one will connect london with birmingham and the west midlands and phase two will extend the route to manchester, leeds and beyond. Monitoring and analysis of ground settlement induced by. In order to design the tunnel, the method of construction to be adopted for the works execution needs to be defined. Engineering survey system for tbm tunnel boring machine tunnel construction strategic integration of surveying services fig working week 2007 hong kong sar, china 17 may 2007 617 3. Pdf advances in the design and reliability of tunnel boring machines have led to a significant increase in their utilization in recent decades.
Application of tunnel boring machines in underground mine. Chapter 8 addresses the investigation, design, construction and instrumentation concerns and. Behavior of reinforced concrete and steel fiber reinforced. Throughout the world, tunnels vary greatly in design, excavation, and completion resulting in a wide array of prices. The largest tbmepb machine in the world, designed to the. Design and optimization of tunnel boring machines by. Construction methods and activities draft eis and dr aft section 4f evaluation 33 june 2017 surface construction would also be required where the new track surface alignment would be constructed, at the shaft sites from which soil and rock would be excavated, and where ground. Recommendations of selecting and evaluating tunnel boring machines by germany, switzerland and austria 1. The current sentiment in australia and new zealand anz suggests that tunnel delivery is more expensive there than in the rest of the world. Risk control at the design of a km long railway tunnel in.
Long tunnel distances mean greater requirements regarding wear and tbm design for. Different methods of tunnel construction and their details. Risk control at the design of a km long railway tunnel. Cost estimates were crew based and included an allowance for shotcrete lining, waterproofing, tunnel boring machine tbm setup, mine rescue, and various other required support elements. Appendix d tbm tunnel assumptions and cost estimating output discussion. It should be noted that the application of these systems at the design stage is strongly dependant on the quality of the site investigation data available. Appendix d tbm tunnel assumptions and cost estimating. Abstract in order to determine the specification of the machine to offer a tunnel boring machine tbm supplier requires a minimum amount of information. Standardisation needs for the design of underground structures. In most cases, these functions can be accomplished continuously during each mining cycle.