The influence of middle partition wall structure
and crosssection
type of the parallel pilot tunnel on the ventilation effect is investigated by using the FLUENT numerical
simulation software to comparatively analyze the ventilation effects of the
semicircular arch, threecentered
circular, and straightwall crosssections on the ventilation effect under concrete, uncorrugated
steel plate, and corrugated plate middle partition walls, respectively. The
results show that, (1) under the same crosssection
type, the new types of uncorrugated steel plate and corrugated plate middle
wall effectively reduce the ventilation resistance coefficient by 10%~17%
compared with the traditional concrete middle partition wall. The uncorrugated
steel plate middle wall illustrates an excellent reduction effect of the
ventilation resistance along the path, followed by the corrugated plate middle
wall. (2) Under the same middle partition wall, the tunnel crosssection with a large equivalent diameter effectively reduces the
ventilation resistance coefficient and the friction resistance because the
parallel pilot tunnel crosssection area and the
absolute rough height are the same. (3) The threecentered
circular crosssection depicts the best performance.
LONG Kaitian
,
ZHAO Jianhua
,
GUO Chun
. Influence of Middle Partition Wall Structure and CrossSection
Type of Parallel Pilot Tunnel on Ventilation Effect[J]. Tunnel Construction, 2023
, 43(4)
: 658
-664
.
DOI: 10.3973/j.issn.2096-4498.2023.04.012
