Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum
Abstract Tool wear is a noteworthy problem in the process of shield tunneling, and the degree of wear varies with stratum. The sand‐pebble strata in Beijing are typically mechanically unstable. However, many subways are buried wholly or partially in sand‐pebble strata. Taking the Beijing New Airport...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-09-01
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| Series: | Deep Underground Science and Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/dug2.12010 |
| _version_ | 1797825225055797248 |
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| author | Hua Jiang Jiachen Zhu Xiaoyan Zhang Jinxun Zhang Hongliang Li Lingfeng Meng |
| author_facet | Hua Jiang Jiachen Zhu Xiaoyan Zhang Jinxun Zhang Hongliang Li Lingfeng Meng |
| author_sort | Hua Jiang |
| collection | DOAJ |
| description | Abstract Tool wear is a noteworthy problem in the process of shield tunneling, and the degree of wear varies with stratum. The sand‐pebble strata in Beijing are typically mechanically unstable. However, many subways are buried wholly or partially in sand‐pebble strata. Taking the Beijing New Airport line tunneling project as research background, this study evaluated the wear characteristics of the multiconfiguration rippers of a 9‐m‐diameter spoke‐type shield tunneling machine in a sand‐pebble stratum. The wear values of five ripper teeth and ripper flanks were analyzed based on field‐measured data from the Beijing New Airport line project. As the analytical results show, the wear value generally increases as the installation radius enlarges with the rise of cutting trace length. The wear of the 190‐rippers was divided into five categories: pedestal wear, ripper teeth collapse, uniform wear, ripper teeth falling off and ripper flank wear. Uniform wear of the ripper teeth and ripper flank wear were the two abrasion types of the 190‐rippers. The teeth of the 155‐rippers mostly maintained their cutting capacity under the protection of the 190‐rippers. A wear prediction model of linear fitting field data was developed for a 190‐ripper face to obtain the optimum shield driving distance in the sand‐pebble stratum. The average wear coefficients of the 190‐ripper before and after replacement matched well, being 0.045 and 0.066 mm/km, respectively. The results of this study provide a theoretical reference for tool wear prediction in shield construction under similar geological conditions. |
| first_indexed | 2024-03-13T10:50:53Z |
| format | Article |
| id | doaj.art-102cdd14b2cf40caa953d9f8b10b5094 |
| institution | Directory Open Access Journal |
| issn | 2097-0668 2770-1328 |
| language | English |
| last_indexed | 2024-03-13T10:50:53Z |
| publishDate | 2022-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Deep Underground Science and Engineering |
| spelling | doaj.art-102cdd14b2cf40caa953d9f8b10b50942023-05-17T12:50:28ZengWileyDeep Underground Science and Engineering2097-06682770-13282022-09-0111657610.1002/dug2.12010Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratumHua Jiang0Jiachen Zhu1Xiaoyan Zhang2Jinxun Zhang3Hongliang Li4Lingfeng Meng5Department of Urban Underground Space, School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaDepartment of Urban Underground Space, School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaDepartment of Urban Underground Space, School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaPost‐Doctoral Research Center Beijing Urban Construction Group Co., Ltd. Beijing ChinaDepartment of Urban Underground Space, School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaDepartment of Urban Underground Space, School of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaAbstract Tool wear is a noteworthy problem in the process of shield tunneling, and the degree of wear varies with stratum. The sand‐pebble strata in Beijing are typically mechanically unstable. However, many subways are buried wholly or partially in sand‐pebble strata. Taking the Beijing New Airport line tunneling project as research background, this study evaluated the wear characteristics of the multiconfiguration rippers of a 9‐m‐diameter spoke‐type shield tunneling machine in a sand‐pebble stratum. The wear values of five ripper teeth and ripper flanks were analyzed based on field‐measured data from the Beijing New Airport line project. As the analytical results show, the wear value generally increases as the installation radius enlarges with the rise of cutting trace length. The wear of the 190‐rippers was divided into five categories: pedestal wear, ripper teeth collapse, uniform wear, ripper teeth falling off and ripper flank wear. Uniform wear of the ripper teeth and ripper flank wear were the two abrasion types of the 190‐rippers. The teeth of the 155‐rippers mostly maintained their cutting capacity under the protection of the 190‐rippers. A wear prediction model of linear fitting field data was developed for a 190‐ripper face to obtain the optimum shield driving distance in the sand‐pebble stratum. The average wear coefficients of the 190‐ripper before and after replacement matched well, being 0.045 and 0.066 mm/km, respectively. The results of this study provide a theoretical reference for tool wear prediction in shield construction under similar geological conditions.https://doi.org/10.1002/dug2.120109‐m‐diameter shieldlong‐distance shield drivingoptimum driving distancesand‐pebble stratumtool wearwear prediction model |
| spellingShingle | Hua Jiang Jiachen Zhu Xiaoyan Zhang Jinxun Zhang Hongliang Li Lingfeng Meng Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum Deep Underground Science and Engineering 9‐m‐diameter shield long‐distance shield driving optimum driving distance sand‐pebble stratum tool wear wear prediction model |
| title | Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum |
| title_full | Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum |
| title_fullStr | Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum |
| title_full_unstemmed | Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum |
| title_short | Wear mechanism and life prediction of the ripper in a 9‐m‐diameter shield machine tunneling project of the Beijing new airport line in a sand‐pebble stratum |
| title_sort | wear mechanism and life prediction of the ripper in a 9 m diameter shield machine tunneling project of the beijing new airport line in a sand pebble stratum |
| topic | 9‐m‐diameter shield long‐distance shield driving optimum driving distance sand‐pebble stratum tool wear wear prediction model |
| url | https://doi.org/10.1002/dug2.12010 |
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