Tunnel Segment Bolts for Shenyang Metro Line 4

Jun 04, 2021

Anyang Railway Equipment Co., Ltd(AT). signed a supply contract for Shenyang Metro Line 4, including 98989 sets M24 Tunnel Segment Bolts(Grade:6.8), and 914 sets M24 Tunnel Segment Bolts(Grade:8.8), the total length is 520mm, all the bolts, washers and nuts are hot-dip galvanizing.

Shenyang is a national historical and cultural city in China and the birthplace of the Qing Dynasty. It is known as "the birthplace of one dynasty and the capital of two generations of emperors". Shenyang is the political, economic, cultural center and transportation hub of the Northeast region.
Shenyang Metro refers to the urban rail transit serving Shenyang City, Liaoning Province, China. Its first line opened for trial operation on September 27, 2010, making Shenyang the eleventh city in mainland China that has opened rail transit.
Shenyang Metro Line 4 is the 5th subway line to be opened in Shenyang, Liaoning Province, China. The length of Shenyang Metro Line 4 is about 34.112 km and has 23 stations, all of which are underground.
Shenyang Metro Line 4 held a groundbreaking ceremony on November 18, 2015, and construction started in September 2018. It is expected to start trial operation in December 2022, and the initial operation will be opened in the first half of 2023.

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Curved Tunnel Bolts (Tunnel Segment Bolts)

A tunnel segment bolt is a kind of special fastener used to link and fasten segments of shield tunneling machines during tunnel excavation. Through this kind of bolt connection, severkal arched segments can be connected into a circle, thereby supporting the entire tunnel surface. During excavation, the ground settlement can be effectively controlled, the impact on the ground buildings can be reduced, and the construction underwater can be effectively controlled. When digging, it does not affect the characteristics of water surface traffic. This kind of fastened connection piece designed as a straight line or a certain arc is called a tunnel bolt or segment bolt.

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