Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite
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 investig...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-05-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/10/9/3231 |
| _version_ | 1797568703930302464 |
|---|---|
| author | Tae Young Ko Sean Seungwon Lee |
| author_facet | Tae Young Ko Sean Seungwon Lee |
| author_sort | Tae Young Ko |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T20:00:42Z |
| format | Article |
| id | doaj.art-d020ffe1985f48e6a2711aa6cc66f560 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T20:00:42Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d020ffe1985f48e6a2711aa6cc66f5602023-11-19T23:37:13ZengMDPI AGApplied Sciences2076-34172020-05-01109323110.3390/app10093231Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah GraniteTae Young Ko0Sean Seungwon Lee1TBM Team, SK E&C, Seoul 03149, KoreaDepartment of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, KoreaThe 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.https://www.mdpi.com/2076-3417/10/9/3231abrasiveness<i>CAI</i>weardisc cutterslurry pipewear coefficient |
| spellingShingle | Tae Young Ko Sean Seungwon Lee Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite Applied Sciences abrasiveness <i>CAI</i> wear disc cutter slurry pipe wear coefficient |
| title | Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite |
| title_full | Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite |
| title_fullStr | Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite |
| title_full_unstemmed | Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite |
| title_short | Effect of Rock Abrasiveness on Wear of Shield Tunnelling in Bukit Timah Granite |
| title_sort | effect of rock abrasiveness on wear of shield tunnelling in bukit timah granite |
| topic | abrasiveness <i>CAI</i> wear disc cutter slurry pipe wear coefficient |
| url | https://www.mdpi.com/2076-3417/10/9/3231 |
| work_keys_str_mv | AT taeyoungko effectofrockabrasivenessonwearofshieldtunnellinginbukittimahgranite AT seanseungwonlee effectofrockabrasivenessonwearofshieldtunnellinginbukittimahgranite |