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Shield Tunnel Bolts, Tunnel Segment Bolts for Xiamen Metro Line 4

In 2019, Anyang Railway Equipment Co., Ltd. provided 10,100 sets of 10,100 shield tunnel bolts to Xiamen Metro Line 4

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Xiamen Metro Line 4 is a subway line under construction by Xiamen Metro, the total length of Xiamen Metro Line 4 is 71.23 km, which has 19 stations.

In 2019, Anyang Railway Equipment Co., Ltd. provided 10,100 sets of 10,100 shield tunnel bolts to Xiamen Metro Line 4.

  1. The segment connection bolts are made of 45#steel, and the surface of the bolts is treated with zinc chrome coating to prevent rust. The zinc chrome coating meets the requirements of “Specifications ofZinc/Chromate Coatings” (GB/T18684-2002), and the protection level is not lower than 9 after the 480h neutral salt spray test. The mechanical properties of the ring tunnel bolts are grade 6.8 and 8.8
  2. The mechanical properties of the circumferential bolts and nuts and the longitudinal bolts and nuts are both grade 5and 6.
  3. The flat washer and nut are made of 45# steel, and the chemical composition and mechanical properties of the material meet the requirements of GB/T 699.

 

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