长距离无压输水隧洞内壁减糙措施研究  

Roughness Reduction Measures of Inner Wall of Long-Distance Free-Flow Water Conveyance Tunnel

作　　者：王红帅[1] 周应祥[1] 王凯生 牛文娟[1] WANG Hongshuai;ZHOU Yingxiang;WANG Kaisheng;NIU Wenjuan(Xinjiang Water Conservancy and Hydropower Survey and Design Institute,Urumqi 830000,Xinjiang,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《隧道建设(中英文)》2024年第S2期399-405,共7页Tunnel Construction

摘　　要：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.

关 键 词：TBM隧洞 无压隧洞 净空余幅 内壁减糙 减糙材料 

分 类 号：U45[建筑科学—桥梁与隧道工程]