Wear Characteristics of TBM Disc Cutter Ring Sliding against Different Types of Rock
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2208-2
Tunnel Engineering
Wear Characteristics of TBM Disc Cutter Ring Sliding against Different Types of Rock Laikuang Lin
a
, Yimin Xia
a
, and Xuhui Zhang
a
a
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
ARTICLE HISTORY
ABSTRACT
Received 3 December 2019 Revised 9 April 2020 Accepted 24 May 2020 Published Online 5 August 2020
To investigate wear characteristics of tunnel boring machine (TBM) disc cutter rings interacting with types of rock, a range of wear tests were performed on a TBM cutter test rig, and laboratory-scale disc cutters were used in the experiments. The mass loss, vertical load, temperature field, wear mechanism and change rule of cutter tip for the disc cutter rings were obtained during the tests. The results indicate that the rock types and properties of rock exhibit great influences on the cutter wear. The variation of the weight loss testing with different types of rock is partially explained by the discrepancies of vertical load, cutting temperature, and the transition of wear mechanisms. In addition, the test results show that the wear characteristics of cutter rings are mainly affected by uniaxial compressive strength (UCS) rather than equivalent quartz content (EQC) for types of rock. This study will benefit the design of cutter rings with enhanced wear resistance.
KEYWORDS Tunnel boring machine Disc cutter Abrasive wear Rock abrasiveness
1. Introduction Tunnel boring machine (TBM) is widely used in tunnel engineering due to its excellent tunneling performance and high safety (Geng et al., 2016; Zhang et al., 2018). Disc cutter is the key rock breaking component, which is installed on the cutterhead (Rostami, 2013; Choi and Lee, 2016). When breaking hard rocks, the cutter rings suffer from strong impact load, and severe wear, resulting in a high wastage of disc cutters and enormous economic loss. In a TBM project, the pecuniary loss associated with the cutter wear is about 1/5 of the excavation cost while the cutter replacement time accounts for nearly 1/3 of the total construction time (Zhang, 2010). Therefore, to develop the disc cutters performance, it is significantly necessary and attractive to reveal the wear characteristics of disc cutters on complicated geological conditions. The wear characteristics of TBM disc cutters are influenced by a lot of factors, for instance the cutter properties, cutting parameters, rock types and rock properties (Rostami et al., 2014; Macias et al., 2016; Zhou et al., 2019). The rock types and rock properties are the key factors to affect the cutter wear characteristics during the cutting process (Li et al., 2020). To reveal the rock abrasiveness and the influences of rock properties on the abrasive wear of cutter rings, several test methods and indices were proposed, including the laboratoire central des ponts et chaussées CORRESPONDENCE Laikuang Lin
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ⓒ 2020 Korean Society of Civil
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