Long-Distance Shield Tunneling Through Flexible Casings and Atmospheric Pressure Chamber Opening for Obstacle Removal in Urban Central Areas

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Architectural Engineering

Architectural Engineering is an international comprehensive professional academic journal of Ivy Publisher, concerning the development of architectural theory and architectural design development on the combination of architectural theory and modern industrial technology. The main focus of the journal is the academic papers and comments of latest architectural research improvement in the fields of nature science, engineering technology, economy a... [More] Architectural Engineering is an international comprehensive professional academic journal of Ivy Publisher, concerning the development of architectural theory and architectural design development on the combination of architectural theory and modern industrial technology. The main focus of the journal is the academic papers and comments of latest architectural research improvement in the fields of nature science, engineering technology, economy and science, report of latest research result, aiming at providing a good communication platform to transfer, share and discuss the theoretical and technical development of architectural theory development for professionals, scholars and researchers in this field, reflecting the academic front level, promote academic change and foster the development of architectural theory and design method.

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Long-Distance Shield Tunneling Through Flexible Casings and Atmospheric Pressure Chamber Opening for Obstacle Removal in Urban Central Areas

Full Text(PDF, 1942KB)

Author: Yuwei Su

Abstract: In shield tunneling projects within urban central areas, shield machines increasingly encounter abandoned underground trenchless pipelines, posing a persistent and challenging obstacle to smooth construction progress. To address this issue, this paper proposes three core countermeasures: equipment modification, pre-grouting of casings, and forward-reverse flushing circulation technology. Additionally, to accommodate stoppage conditions during long-distance tunneling, intermediate reinforcement zones have been established to facilitate atmospheric-pressure chamber opening for obstacle removal. These measures have been successfully implemented and validated in the Section 2#–5# (a 3-km-long DN3500 shield tunnel) of the Longhua Wastewater Treatment Plant’s Initial Rainfall Storage Project in Xuhui District, Shanghai, demonstrating their feasibility and effectiveness, thereby offering valuable reference for similar engineering projects.

Keywords: Slurry Pressure Balance Shield; Obstacle Removal; HDPE Flexible Trenchless Pipeline; Chamber Opening

References:

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[3] 郁进峰.管道顶进中的全气压清障施工技术[J].建筑施工, 2011, 33(3):3.DOI:CNKI:SUN:JZSG.0.2011-03-025.