为研究输水隧洞内壁涂刷新型材料减糙的技术措施，提高输水能力，以新疆某TBM掘进大埋深长距离输水隧洞工程为依托，结合工程实际情况，针对隧洞内低温、高湿的环境特点，通过现场减糙试验，从外观质量、现场粘结度和耐久性等3方面，对13种减糙材料进行综合对比，选择了水性体系的聚合物无机网络键减糙材料，该材料可以适时固化，表面光滑度、平整度好，具有较好的粘结强度和耐久性，同时减糙后隧洞的过流能力满足规范要求。与常规技术措施相对比，减糙措施具有降低安全隐患、施工便捷、缩短工期和投资小等优点。通过现场试验，对隧洞内壁减糙技术措施从材料的选择及性能指标的检测提出一套完整的创新理念，提出减糙材料外观质量和粘结强度检测标准。目前，现场试验段已全部按规操作完毕，距今4年，外观监测情况良好。
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.
