Steady progress was made in the Pearl River Estuary tunnel project of the Shenzhen-Jiang Railway

Deep river railway tunnel project is steady progress of pearl river mouth, shield has been rolled out in late August, shortly "deep river () in the bay area size 2" will set out from guangzhou nansha of shield machine, and from dongguan humen "deep river" 1 shield machine in the pearl river estuary waters underwater tunneling, violent end respectively with mine section for the connection of underwater precision in the middle. Upon completion, the Shenzhen-River Railway will further open up high-speed rail links along the coast, help build a half-hour living and economic circle in the Guangdong-Hong Kong-Macao Greater Bay Area, and promote the coordinated development of eastern And Western Guangdong and the Pearl River Delta.

Shenjiang Railway is an important part of the coastal corridor of the "eight vertical and eight horizontal" high-speed railway, and a major transportation infrastructure supporting the construction of the Guangdong-Hong Kong-Macao Greater Bay Area. The main line is 116 kilometers long, passing through shenzhen, Guangzhou, Dongguan, Zhongshan, jiangmen five cities. Because the line needs to cross the pearl River estuary between Guangzhou and Dongguan, the geology is very complicated, the design scheme was selected several times, and finally changed from rail-highway bridge to tunnel. The pearl River Mouth tunnel is 13.69 kilometers long, with a design speed of 250 kilometers per hour and a maximum buried depth of 115 meters underwater. It is the deepest underwater tunnel record in China. The maximum water pressure is 1.06 mpa, equivalent to bearing 10.6 kilograms of pressure per square centimeter, and the strength is more than 10 standard atmospheric pressure, which is the world's largest.