M27 Shield Tunnel Segment Bolts for Chuhe Canal
In 2021, Anyang Railway Equipment Co., Ltd. provided 25,000 sets of M27 shield tunnel segment bolts to the trunk canal of Chuhe Grade 4 Station.
The trunk canal of Chuhe fourth-level station is an important supporting project for Jiangxiang Reservoir and Simashan Irrigation Area. After completion, it can supply 220 million cubic meters of water to Dingyuan annually, which is of great significance for further consolidating the achievements of poverty alleviation in the Jianghuai watershed area and laying a solid foundation for rural revitalization. major. The project is included in the 150 major water conservancy projects that the State Council will focus on promoting construction from 2020 to 2022, with a total construction period of 30 months and is scheduled to be completed in May 2023. The project is the first water conservancy project constructed by shield tunneling method in Anhui Province. It is suitable for the large geological changes and the characteristics of soft upper and lower rock layers. It is a 400-meter small-radius shield operation. Each shield interval is 3.75 kilometers. The length is rare in the country.
In 2021, Anyang Railway Equipment Co., Ltd. provided 25,000 sets of M27 shield tunnel segment bolts to the trunk canal of Chuhe.
Circumferential seam connecting bolts and their connecting pairs 16 sets/ring, longitudinal seam connecting bolts and their connecting pairs 12 sets/ring, 1 connecting bolt + 1 nut + 2 washers = 1 set; the mechanical property level of the bolt is 6.8, The mechanical performance grade of the nut is 6.0, and the minimum mechanical performance grade of the washer is Hv=200; the bolts, nuts and washers are all made of zinc-based chromate anti-corrosion coating with a thickness of 6μm.
