To improve the water
conveyance capacity, the technical measures to reduce the roughness of the
inner wall of the water conveyance tunnel are studied, and the technical
measures to increase the flow section are replaced by brushing novel roughening
material on inner wall. Based on a tunnel boring machine-bored long-distance water conveyance tunnel
project in Xinjiang, China, 13 kinds of rough reduction materials are
comprehensively compared from the aspects of appearance quality, on-site adhesion, and durability based on the environmental
characteristics of low temperature and high humidity in the tunnel. The polymer
inorganic network bond reduction material of the water-based
system is finally selected, which can be cured in a timely manner, has good
surface smoothness and flatness, as well as good bond strength and durability.
The overflow capacity of the tunnel after roughening meets the requirements of
the specification. Compared with conventional technical measures, rough
reduction materials have the advantages of reducing potential safety hazards,
convenient construction, shortening the construction period, and small
investment. Through field tests, a complete set of innovative concepts are put
forward for the technical measures of roughening the inner wall of the tunnel
from the selection of materials and the detection of performance indicators,
and the testing standards for the appearance quality and bond strength of
roughening materials are put forward for the first time. The field test section
has been fully operated according to regulations, and the appearance monitoring
is good. In the later stage, it will be continuously monitored in combination
with the water operation.
WANG Hongshuai
,
ZHOU Yingxiang
,
WANG Kaisheng
,
NIU Wenjuan
.
Roughness Reduction Measures of Inner Wall of Long-Distance Free-Flow Water Conveyance Tunnel
[J]. Tunnel Construction, 2024
, 44(S2)
: 399
-405
.
DOI: 10.3973/j.issn.2096-4498.2024.S2.040
