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141,900 sets of M30 Tunnnel Shield Segment Bolts With Steel Washers for Shenzhen Metro

Jun 24, 2023
Guangdong-Hong Kong-Macao Greater Bay Area Shenzhen Metropolitan Area Railway Shenzhen Airport to Daya Bay Intercity Shenzhen Airport to Pingshan Section 1 Bid (T4-Wuhe) The main project has been approved by the Shenzhen Development and Reform Commission with Shenzhen Development and Reform Commission [2021] No. 340 The Shenzhen-University Intercity Railway Shenzhen Section is located in the northern part of Shenzhen City. The overall direction is east-west. The line starts from the T4 terminal of Shenzhen Bao'an Airport, passes through the four districts of Bao'an, Longhua, Longgang and Pingshan in Shenzhen, and ends at Julong Station.
Shenzhen-University Intercity 1 Bid Section China Railway Construction South Construction Investment Co., Ltd. undertakes the construction tasks in the second, fourth and fifth construction areas. The length of the section is 13.433km; there are 6 stations, including 2 hub stations and transfer stations, respectively Longsheng, The people govern the north. 1 ordinary station, which is the jute station; all are underground lines and underground stations.
In 2023, Anyang Railway Equipment Co., Ltd. will provide 141,900 sets of M30 tunnnel shield segment bolts (grade 8.8; zinc-chromium anti-corrosion coating thickness ≥ 8.6um), including steel washers (outer diameter 70mm, inner diameter 32mm, thickness 10mm, hardness grade Hv ≥ 200; zinc chrome anti-corrosion coating thickness ≥ 8.6um). The specific technical requirements are as follows
1. The longitudinal and circumferential bolts are all made of M30 tunnel segment bolts, the product grade is C grade, the mechanical performance grade is not lower than 8.8 grade, and the processing quantity is: 33 pcs/ring;
2. The bolt sleeve is made of polyamide material, and the pull-out force is not less than 470 KN;
3. The bolt ring adopts steel washer, the processing quantity is 33 pcs/ring, and the hardness level is Hv=200;
4. The durability of bolts, nuts and washers is 100 years, and can meet the environmental requirements under various working conditions;
5. When bolts are processed into threads, attention must be paid to the proper looseness of the bolt sleeves;
6. The bolts and washers are all made of zinc complex anti-corrosion coating, and the coating thickness is not less than 8.6μm
7. The bolt pre-tightening force should comply with the relevant regulations of "Metric Bolt Tightening Torque" Q/STB 12.521.5-2000. For grade 8.8, the pre-tightening force should be 952~1269N*m, and for grade 10.9, the pre-tightening force should be 400~650N*m.
M30 Tunnnel Segment Bolts With Steel Washers for Shenzhen Metro - Anyang Railway Equipment M30 Tunnnel Segment Connection Bolts With Steel Washers for Shenzhen Metro - Anyang Railway Equipment