In this study, the critical structural designs of pipe
jacking machine with spokeplate cutterhead and faceplate cutterhead used in the Chao′er riverWest Liaohe river water diversion project are investigated. The
stress distribution laws are derived using finite element method, and the
mechanical properties of the cutter arrangement are characterized using
numerical calculations. The results reveal the following findings: (1) The
opening rate of the spokeplate cutterhead, especially
the opening in the central area, is larger than that of the faceplate cutterhead. The possibility of mud cake(e.g., clay and gravel)
to be present in the composite stratum is less. (2) Two kinds of cutterhead
structural forms satisfy the structural strength requirements, wherein the faceplate cutterhead exhibits higher structural strength. (3) According
to the analyzed mechanical properties, the unbalanced radial force and
overturning moment generated by the doublecross disccutter arrangement of the spokeplate
cutterhead are smaller than those of the faceplate
cutterhead, and both cutterheads fulfill the design requirements. (4)
Considering the geological conditions, structural form, strength analysis,
cutter layout, and mechanical properties, the spokeplate
cutterhead structure is selected as the primary structure in this project.
Through project application, the adopted cutterhead operates stably with
appropriate geological adaptability.
XUE Jing
. Key Technologies of Pipe Jacking Machine′ Cutterhead in Chao′er RiverWest Liaohe River Water Diversion Project[J]. Tunnel Construction, 2022
, 42(12)
: 2157
-2165
.
DOI: 10.3973/j.issn.2096-4498.2022.12.018
