Water leakage in railway
tunnels signifies a decline in the performance of tunnel waterproofing and
drainage systems, which compromises their safe operation. To mitigate such
water leakage issues, the authors identify existing challenges in tunnel waterproofing
and drainage systems at various stages through a literature review, on-site investigations, model testing, and field testing. Subsequently,
measures to ensure effective waterproofing and drainage are discussed,
including design optimization, construction quality control, material
performance specifications, and drainage system maintenance. The research
findings are summarized as follows: (1) During the design phase, measures such
as constructing waterproof drainage boards, drainage-type
self-adhesive back-adhesive
waterstops, and inverted arch drainage systems enhance drainage capacity and
prevent the lining from being compromised by buried waterstops. (2) During the
construction phase, promoting the adhesive laying and hanging process minimizes
the risk of hot welding penetration of waterproof boards. Additionally,
implementing precise construction practices, such as strengthening drainage
system joints and securely fixing waterstop clamps, improves the overall
construction quality of waterproofing and drainage systems. (3) During the
material stage, distinctly outlining key performance requirements, including
flame retardancy of waterproof boards, anti-degradation
properties of geotextiles, anti-crystallization
properties of drainage blind pipes, and high-temperature
resistance, helps meet the demands of complex tunnel engineering environments.
(4) During the operational phase, using U-shaped anti-crystallization seals and micro-mechanical
dredging equipment helps maintain smooth and functional drainage systems.
GUO Xiaoxiong
,
MA Weibin
,
LUO Chi
,
AN Zheli
,
CHANG Kai
,
ZHENG Zefu
,
XU Tianyuan
. Key Issues and Performance
Assurance Measures of Waterproofing and Drainage
Systems in Railway Tunnels[J]. Tunnel Construction, 2024
, 44(12)
: 2424
-2441
.
DOI: 10.3973/j.issn.2096-4498.2024.12.012
