Next Article in Journal
MHD Natural Convection of a Fe3O4–Water Nanofluid within an Inside Round Diagonal Corner Square Cavity with Existence of Magnetic Source
Next Article in Special Issue
Effects of Soil Conditioning on Characteristics of a Clay-Sand-Gravel Mixed Soil Based on Laboratory Test
Previous Article in Journal
COTS-Based Architectural Framework for Reliable Real-Time Control Applications in Manufacturing
Previous Article in Special Issue
Analysis of Undrained Seismic Behavior of Shallow Tunnels in Soft Clay Using Nonlinear Kinematic Hardening Model
Open AccessArticle

Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite

1
TBM Team, SK E&C, Seoul 03149, Korea
2
Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Korea
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(9), 3231; https://doi.org/10.3390/app10093231
Received: 17 April 2020 / Revised: 1 May 2020 / Accepted: 4 May 2020 / Published: 6 May 2020
(This article belongs to the Special Issue Advances in Geotechnical Engineering)
The abrasiveness of rocks significantly influences the wear endured by excavation tools in tunnel boring machines (TBMs). In slurry shield TBMs, wear occurs not only in excavation tools but also in discharge pipes and pumps of slurry transport systems. To explore this phenomenon, this study investigated the effect of rock abrasiveness on the wear of both disc cutters and slurry discharge pipes in slurry shield TBMs. The radial wear of disc cutters and the thickness of slurry discharge pipes were measured and monitored at a TBM site in Singapore. The relationship between the weathering grade of Bukit Timah granite and the wear coefficient of disc cutters was analysed, and a correlation between the Cerchar Abrasivity Index values and the wear coefficient of 19 inch disc cutters was suggested. Additionally, the average wear rates of slurry discharge pipes used for Bukit Timah granite were determined based on the pipe thickness measurements. The wear rates of weathering grades G(I) to G(IV) of Bukit Timah granite were observed to be highly similar to each other, whereas the wear rates of G(V) grade and mixed ground were 1.55 times higher than those of the G(I) to G(IV) grades. The correlation between the slurry discharge velocity and the wear rate in slurry discharge pipes was thus derived. The accurate assessment of the effect of rock abrasiveness on both the wear of disc cutters and the wear rate in slurry discharge pipes, investigated in this paper, will highlight the need for efficient maintenance of the excavation tools in TBMs and encourage the development of various equipment wear prevention measures in order to minimize overall construction costs and time. View Full-Text
Keywords: abrasiveness; CAI; wear; disc cutter; slurry pipe; wear coefficient; Bukit Timah granite abrasiveness; CAI; wear; disc cutter; slurry pipe; wear coefficient; Bukit Timah granite
Show Figures

Figure 1

MDPI and ACS Style

Ko, T.Y.; Lee, S.S. Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite. Appl. Sci. 2020, 10, 3231. https://doi.org/10.3390/app10093231

AMA Style

Ko TY, Lee SS. Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite. Applied Sciences. 2020; 10(9):3231. https://doi.org/10.3390/app10093231

Chicago/Turabian Style

Ko, Tae Y.; Lee, Sean S. 2020. "Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite" Appl. Sci. 10, no. 9: 3231. https://doi.org/10.3390/app10093231

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop