Research on safety control of rigid interface pipelines under subway tunnel excavation

doi:10.16265/j.cnki.issn1003-3033.2021.08.014

Abstract

Abstract: In order to reduce possible pipeline leakage and damage caused by excavation of adjacent metro tunnels, based on soil excavation deformation, pipe-soil relative stiffness and material strength criterion, a method of allowable maximum settlement for rigid interface pipelines was established through analytical derivation for single-track tunnels and double-track ones respectively. Then, design charts of settlement control for pipelines of different materials were proposed. The results show that control standards of large-scale pipelines is relatively stricter, and the order of pipeline risk sources considering settlement control is like reinforced concrete pipeline > centrifugal cast iron pipeline > steel pipeline > nodular cast iron pipeline. Moreover, the modified standards with consideration to pipe-soil relative stiffness is more reasonable, and when pipe-tunnel is vertical and relative stiffness is small, standards will be stricter, which should be paid close attention to.

Key words: metro tunnel excavation, rigid interface pipeline, safety control, pipe-soil relative stiffness, allowable settlement

CLC Number:

X948

WANG Yu, WANG Kaixuan. Research on safety control of rigid interface pipelines under subway tunnel excavation[J]. China Safety Science Journal, 2021, 31(8): 97-103.

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