130,000 sets of M27 Tunnel Segment Bolts for Qingdao Metro Line 6

The second phase of Qingdao Metro Line 6 starts from Qingxi Station in the west and ends at Xintun Road Station, the starting point of the first phase of Line 6 in the east. It is mainly located in the old town of Jiaonan on the west coast of Qingdao. The line is planned along the green axis of the business district of Qingxi Station and Zhushan Road. , Shuangzhu Road and Binhai Avenue laying. The second phase of Line 6 has a total length of 13.85km, all are underground lines, and has 10 stations. Among them, the civil engineering work of Qingxi Station and some sections before and after has been completed simultaneously with the Qingxi High-speed Railway Station. The average station spacing is 1376.74m, and the largest station The spacing is 1871.740m, located between Mangrove Station and Xintun Road Station. The minimum spacing between stations is 1018.81m, located between Shuangzhu Road Station and Fenghuangshan Road Station.
In 2023, Anyang Railway Equipment Co., Ltd.(AT) provided 130,000 sets of M27*545mm tunnel segment bolts to the second phase of Qingdao Metro Line 6, with hot-dip galvanized high-strength bolts grade 8.8.
Acceptance standards: Segment bolts "Technical Conditions for High-Strength Large Hexagon Head Bolts, Large Hexagon Nuts and Washers for Steel Structures" (GB/T 1231-2006) and "Mechanical Properties of Fasteners Bolts, Screws and Studs" (GB- T 3098.1-2010), "Mechanical Properties of Fasteners Nuts" (GB/T 3098.2-2015).