The expressway from Lin'an to Jinhua in Zhejiang Province, known as the Lin'an-Jinhua Expressway, starts at Qianqiuguan at the border of Zhejiang and Anhui. This major road connects the two provinces, passing through Lin'an, Tonglu, and Jiande, and finally reaching Jiande in Hangzhou. The total length of this segment is 85.5 kilometers, with a designed speed of 100 kilometers per hour. Once completed, it will significantly shorten the distance from central and western Zhejiang to Hangzhou and will become a new route for the northern part of Lanxi.
Due to the mountainous terrain, the Lin'an-Jinhua Expressway includes 70 bridges and 30 tunnels. Among these, the Yinggong Tunnel is the longest mountain expressway tunnel in Hangzhou, with the right section measuring 4412 meters and the left section 4452 meters. It is also the longest tunnel on the Lin'an-Jinhua Expressway. Given the tunnel's length and its passage through mountainous terrain, ventilation, drainage, and dust reduction during construction pose significant challenges.
To ensure the smooth progress of the project, the Hangzhou transportation authorities made advanced plans, overseeing and guiding the project team to develop a scientific construction plan. Meanwhile, the workers on the Yinggong Tunnel actively responded to the call of the Lin'an-Jinhua Expressway by introducing advanced machinery such as double-arm rock drilling rigs, waterproof board laying trolleys, and invert bridges. They created a mechanized construction line from excavation to support completion, thus improving construction efficiency.
LANHI's LCG312A multifunctional arch trolley is a device that integrates functions such as steel arch installation, mesh welding, rebar connection, and excavation face measurement. This equipment uses a truck chassis, which allows for flexible movement and transfer, efficiently addressing various situations. Its three-arm system features a middle arm with remote control and side arms with local control, allowing simultaneous operation. This not only reduces labor costs and construction risks but also achieves standardization and industrialization of tunnel arch installation.
On January 17, 2022, a significant part of the Lin'an-Jinhua Expressway—the Yinggong Tunnel—was successfully completed, marking the breakthrough of the main line of the Lin'an-Jinhua Expressway.