Tunnel boring machines with single or
dualmodes often face challenges adapting to complex
geological conditions. Therefore, the modeselection
and conversion technology for threemode tunnel boring machines using the Luogang stationShuixi station section of the Guangzhou metro line 7 as a case
study. This project section encompasses soft soil, waterrich sand, and hard rock strata. The tunnel boring machine′s geological characteristics, tunneling risk, and mode adaptability
are comprehensively examined, providing guidance for modeselection and conversion technology for
threemode tunnel boring machines. The results
demonstrate the following: (1) The open and hard rock mode is suitable for long
hard rock formations with high strength,
the slurry balance mode is effective in waterrich
sandy strata with high settlement requirement, and the earth pressure balance
mode is effective in soft soil layer with boulders. (2) The threemode tunnel boring machine exhibits adaptability to various
geological strata, facilitating functional integration and ease of operation.
(3) The modeconversion capability of the tunnel boring
machine is rapid, enabling fast construction. The screw and slurry mucking
modes efficiently handle mucking operations and prevent slurry gushing under
hard rock and waterrich challenging conditions,
respectively.
GUO Junping
,
MA Jingzhe
,
TANG Yongmao
,
YIN Fubin
,
LUO Jie
. ModeSelection and Conversion Technology for ThreeMode Tunnel
Boring Machine: A Case Study of Guangzhou Metro Line 7[J]. Tunnel Construction, 2024
, 44(3)
: 586
-595
.
DOI: 10.3973/j.issn.2096-4498.2024.03.016
