Field performance of concrete pipes during jacking in cemented sandy silt

Q.-L. Cui, Y.-S. Xu, S.-L. Shen, Zhenyu Yin, S. Horpibulsuk

Research output: Journal article publicationJournal articleAcademic researchpeer-review

43 Citations (Scopus)

Abstract

© 2015 Elsevier Ltd.Although many field investigations into pipe-jacking installation have been reported within the literature, there are few reports on the rebar stress in jacking pipes. This paper presents the field performance of concrete pipes during the jacking carried out under the Guan River in Jiangsu, China. Rebar stresses at two wings (the left and right side), the top crest, and the base in the longitudinal and circumferential directions for four different pipes were monitored. The maximum rebar stresses during the jacking were 37.1. MPa in the longitudinal direction and 36.6. MPa in the circumferential direction. However, the maximum rebar stresses after construction were only 18.5. MPa in the longitudinal direction and 20.3. MPa in the circumferential direction. A normalized jacking force ". ?" is proposed to evaluate the additional rebar stress in jacking pipes. The range of ? is from 0.04 to 0.25. The relationship between the rebar stress and the construction procedure is presented and discussed. An excessive jacking force, an alignment deviation or an increased penetration rate would generate a large incremental rebar stress.
Original languageEnglish
Pages (from-to)336-344
Number of pages9
JournalTunnelling and Underground Space Technology
Volume49
DOIs
Publication statusPublished - 1 Jun 2015
Externally publishedYes

Keywords

  • Field behavior
  • Jacking force
  • Jacking pipe
  • Rebar stress
  • Tunnel Boring Machine (TBM) moving

ASJC Scopus subject areas

  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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