1.北京住总市政道桥工程有限责任公司;2.School of Civil Engineering and Architecture,Anhui University of Science and Technology
In order to enhance the safety of underground pressurized water tunnel operation, tunnel expansion joint tightness detection had become an indispensable means.In this paper, based on the Beijing South-to-North Water Diversion Project, a set of large-diameter tunnel expansion joint detection device with integrity and strong mobility was studied through repeated field tests. The device included the integrated support system of ‘portal frame + screw + steel arch’ and the natural rubber ring sealing cavity system of ‘hollow arc convex groove type’ section .The results showed that the integrated support system was easy to operate, reusable, and had a short detection cycle.The natural rubber ring with ‘hollow arc convex groove’ section not only increased the compression of rubber, but also improved the adhesion to the surface of concrete. Combined with the integrated support system, the tightness of the sealing cavity was improved, and the goal of tightness detection was achieved.At the same time, on the basis of field test application, further optimization suggestions were put forward for the support system of the detection device, which provided reference for the subsequent faster detection of the sealing of the expansion joint of the pressurized water conveyance tunnel.
施笋,杨富强,姚韦靖. 大直径有压输水隧洞伸缩缝密闭性试验[J]. 科学技术与工程, , ():复制