To improve the necessity,
feasibility, and safety of gravity-flow
sewage pipelines in utility tunnels, a case study is conducted on a completed
utility tunnel project of Jinding-Hengqin express line
in Zhuhai National High-tech Industrial Zone, key
design points about gravity-flow sewage pipeline in
utility tunnel are summarized and analyzed, and the cross-section, vertical, auxiliary, and structural designs are
highlighted. Some key design points are concluded as follows: (1) When
requirements for pipeline operation and maintenance are high and there is
enough budget, gravity-flow pipeline can be
incorporated into utility tunnel. (2) It is suggested that gravity-flow sewage pipeline can be arranged in a separated cabin to improve
implementation and operation safety of utility tunnel when construction
conditions allow. (3) Auxiliary design of sewage pipeline can adopt the
combination of straight-through inspection well and
cleanout opening for better structural integrity and pipe cleaning. (4) Wavy
vertical design can be used and the main structure of utility tunnel can be
connected to intersecting structure with one wall plate, thus to make full use
of vertical conditions and avoid a large increase of project cost caused by the
increasing buried depth of utility tunnel.
GE Xiaoguang, CHEN Yingqing, XIE Pu, ZHANG Jianliang, YUAN Bingxiang
. Key Design Points for
Gravity-Flow Sewage Pipelines in
Utility Tunnel[J]. Tunnel Construction, 2024
, 44(S1)
: 327
-333
.
DOI: 10.3973/j.issn.2096-4498.2024.S1.036
