Comparative Analysis of Arrangement Modes of Tearing
Cutters for&nbsp;Earth
Pressure Balance Shield Tunneling in Cobble Stratum

CAO Wufu; SHAO Xiaokang; LIU Zhe; YING Sheng; DONG Lipeng; JIANG Yusheng; YANG Zhiyong

doi:10.3973/j.issn.2096-4498.2023.10.015

2023 , Vol. 43 >Issue 10: 1788 - 1794

DOI: https://doi.org/10.3973/j.issn.2096-4498.2023.10.015

Comparative Analysis of Arrangement Modes of Tearing Cutters for Earth Pressure Balance Shield Tunneling in Cobble Stratum

CAO Wufu ,
SHAO Xiaokang ,
LIU Zhe ,
YING Sheng ,
DONG Lipeng ,
JIANG Yusheng ,
YANG Zhiyong

Expand

(1. Beijing MTR Construction Administration Corporation, Beijing 100068, China; 2. School of Mechanics and Civil Engineering, China University of Mining and TechnologyBeijing, Beijing 100083, China; 3. China Railway 18th Bureau Group Co., Ltd., Tianjin 300222, China; 4. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China)

Online published: 2023-11-08

Fold

Abstract

To investigate the influence of tearing cutter arrangement modes on the wear of tearing cutters during earth pressure balance shield tunneling in cobble strata, a case study is conducted on shield tunneling projects of the Ping′anliJishuitan and NiujieJinrongjie sections of Beijing metro line 19. Using mathematical regression analysis, the wear coefficients of tearing cutters under two arrangement modes: large height difference and distance and small height difference and distance, are investigated and compared. The findings are as follows. (1) Under identical geological conditions, excavation parameters, and soil improvement techniques, the wear is significantly higher with the small height difference and spacing arrangement mode compared to the large height difference and spacing arrangement mode. Furthermore, the wear coefficients for high tearing cutters, low tearing cutters, and scrape cutters are 1.5, 3.2, and 2 times greater, respectively, under the small height difference and spacing arrangement mode. (2) The high and low tearing cutters, when placed with a large height difference and spacing, effectively contribute to layering and loosening, thus reducing tearing cutter wear. (3) Scrape wear coefficients under the large height difference and spacing arrangement modes are 42.7% and 36.1% lower compared to the small height difference and spacing arrangement modes, respectively.

Key words： metro; cobble stratum; earth pressure balance shield; tearing cutter; cutter height difference; cutter spacing; wear coefficient

Cite this article

CAO Wufu , SHAO Xiaokang , LIU Zhe , YING Sheng , DONG Lipeng , JIANG Yusheng , YANG Zhiyong .

Comparative Analysis of Arrangement Modes of Tearing Cutters for Earth Pressure Balance Shield Tunneling in Cobble Stratum

[J]. Tunnel Construction, 2023 , 43(10) : 1788 -1794 . DOI: 10.3973/j.issn.2096-4498.2023.10.015

Options

Outlines

〈

〉

模态框（Modal）标题

Abstract

Cite this article