hard rock tunnel boring advance rate and cutter wear

  • TBM performance and disc cutter wear prediction based on ...

    TBM performance and disc cutter wear prediction based on ...

    TBM performance and disc cutter wear prediction based on ten years experience of TBM tunnnelling in Iran. Accurate estimation of rate of penetration (ROP), daily rate of advance (AR), and cutter cost/life is necessary for the justification and successful use of a TBM on any tunneling project.

  • Advances in Mechanical Engineering 2018, Vol. 10(1) 1–12 ...

    Advances in Mechanical Engineering 2018, Vol. 10(1) 1–12 ...

    hard rock tunnel boring machine using collaborative optimization Wei Sun 1, Xiaobang Wang1,MaolinShi1, Zhuqing Wang2 and Xueguan Song1 Abstract A multidisciplinary design optimization model is developed in this article to optimize the performance of the hard rock tunnel boring machine using the collaborative optimization architecture.

  • TBM Design for Long Distance Tunnels Norsk Forening .

    TBM Design for Long Distance Tunnels Norsk Forening .

    TBM Design for Long Distance Tunnels: How to Keep Hard Rock TBMs boring for 15 km or More. LONG DISTANCE TBMs TBMs for 15 km or More INTRODUCTION + Challenges of Tunneling at Long ... tunnel) + High cutter wear required the switch to Robbins robust cutters at several tunnel sites

  • Estimation of Cutter Wear Concerning Secondary ...

    Estimation of Cutter Wear Concerning Secondary ...

    In hard rock TBM tunneling, disc cutter wear is caused not only by initial fragmentation of a rock face but also by fragmentation of residual rock pieces and blocks between a cutterhead and a rock face. These phenomena are considered as primary fragmentation and the secondary one, respectively.

  • NIAGARA TUNNEL PROJECT Technical Facts

    NIAGARA TUNNEL PROJECT Technical Facts

    Nov 21, 2012· The tunnelboring machine is 2,000 tons, cost more than 30 million, is powered by 15 electric motors that generate 6,375 horsepower, and is able to .

  • TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND .

    TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND .

    TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE CHALLENGES ZHAO Jian ... made 5 m/day advance rate. Gotthard tunnel (), the longest (15 km) ... de Mécanique des Roches −LMR Start of rock TBM (1951), at the Oahe Dam (shale) and later at the Humber Sewer (hard rock) tunnels. Seikan tunnel (197288), 54 km long with undersea ...

  • Tunnel boring machine performance in sedimentary rock ...

    Tunnel boring machine performance in sedimentary rock ...

    Fullface tunnel boring machine (TBM) performance during the excavation of six tunnels is considered in terms of utilization, penetration rate, and cutter wear. Construction records for over 75,000 ft (22,860m) of tunnel in sedimentary rock are analyzed, and the results are used to investigate factors affecting TBM performance.

  • Factors influencing performance of hard rock tunnel boring ...

    Factors influencing performance of hard rock tunnel boring ...

    of energy transfer to the rock and the attainable rate of penetration. Single disc cutters are the most commonly used roller cutters for hard rock TBMs. The cut spacing and the depth of penetration per cutter head revolution define the efficiency of rock cutting by disc cutters. As would be expected, the

  • The Mechanism of TBM Cutter Wear in Mixed Ground

    The Mechanism of TBM Cutter Wear in Mixed Ground

    The TBM cutter wear causes not only low performance of tunneling but also the additional cost of cutter discs and potential safety hazard in construction. Excessive cutter wear and replacement were observed in tunneling with a TBM through sandy cobble stratum in Chengdu metro Line 1. Comparison with other geological layer, the ground has leaded to more cutter wear.

  • Elon Musk has been pitching cheap tunnels from The Boring ...

    Elon Musk has been pitching cheap tunnels from The Boring ...

    Jan 23, 2019· The 48 to 82 MPa UCS rock, with a high abrasivity and quartz content, did cause some wear to the cutterhead, though cutter consumption for the whole tunnel was less than predicted.

  • Tunnelling underground design (Topic5hard weak rock ...

    Tunnelling underground design (Topic5hard weak rock ...

    Jun 13, 2015· Tunnelling underground design (Topic5hard weak rock tunnelling) 1. 1 1 of 59 Tunnelling Grad Class (2015) Dr. Erik Eberhardt EOSC 547: Tunnelling Underground Design Topic 5: Hard Weak Rock Tunnelling 2 of 59 Tunnelling Grad Class (2015) Dr. Erik Eberhardt Tunnel Excavation in Rock It is instructive to consider the fundamental objective of the excavation process .

  • THE CERCHAR ABRASIVITY INDEX'S APPLICABILITY TO .

    THE CERCHAR ABRASIVITY INDEX'S APPLICABILITY TO .

    THE CERCHAR ABRASIVITY INDEX'S APPLICABILITY TO DREDGING ROCK L. A. Prieto1 ABSTRACT This paper proposes the application of one of the most useful rock testing procedures, the Cerchar abrasivity test to predict the rate of wear of cutterhead and excavator bucket teeth in dredging, especially in rock. These predictions

  • Disc Cutter Wear Prediction Method of Hard Rock TBM Based ...

    Disc Cutter Wear Prediction Method of Hard Rock TBM Based ...

    And cutter consumption due to wear accounts for 30% of the total construction cost (Tan el al., 2015). The ratios listed above are higher when driving in hard rock. In order to reduce disc cutter costs and improve the driving efficiency, scholars have carried out a lot of researches on wear mechanism and wear rate prediction of disc cutter.

  • Failure Mechanisms in Cutter Tools for Tunnel Boring CORE

    Failure Mechanisms in Cutter Tools for Tunnel Boring CORE

    Tunnel boring machines (TBM) utilize cutter discs as a primary tool for cutting through hard rock. The discs are mounted on a rotating, circular cutter head which is pressed against the rock. A microscopical examination of worn cutter discs has been carried out.

  • New Rock Abrasivity Test Method for Tool Life Assessments ...

    New Rock Abrasivity Test Method for Tool Life Assessments ...

    The goal of the new test design and procedure is to reproduce wear behaviour on hard rock tunnel boring in a more realistic way than the traditionally used methods. Wear by rolling contact on intact rock samples is introduced and several rock types, covering a .

  • MasterRoc ABR 5  ...

    MasterRoc ABR 5 ...

    MasterRoc ABR 5 is a liquid antiabrasion agent designed to reduce the abrasive wear to the cutting tools, substantially reduce dust formation during excavation and cutterhead clogging in hard rock and earth pressure balance (EPB) tunnel boring machines (TBM).