Construction Site

Recently, after more than three months of construction work, earthwork excavation at the No. 3-1 shield launching shaft of the east section of the Shenzhen-Dongguan Tunnel, a controlling project of the Shenzhen-Jiangmen High-Speed Railway, has reached 80%, providing strong support for the shield machine to enter the site by the end of this year.

At the 123-meter-long working shaft, large excavators are busy operating, and workers are carrying out earth and rock excavation and steel support erection. According to reports, the No. 3-1 working shaft is constructed using the open-cut method; excavation is more than halfway complete and is expected to be finished in the fourth quarter of this year. To ensure construction progress, the site operates in 24-hour shifts.

The walls of the No. 3-1 working shaft are inserted into moderately weathered granite, facing difficulties such as limited construction space and high rock strength. As the excavation depth continues to increase, construction difficulty keeps escalating. "The rock strength in the working shaft exceeds 90 MPa, and high-power breakers are currently used for excavation," the on-site manager said. During peak construction periods, various types of large machinery and equipment were arranged around the working shaft, with dozens of workers operating simultaneously. Due to the narrow construction workface, the contractor precisely scheduled construction points and working hours to ensure construction progress.

In addition, key projects such as the No. 3-2 working shaft of the east section of the Shenzhen-Dongguan Tunnel, the Nansha Shipping Support Building section, and the west section of the Shenzhen-Dongguan Tunnel are all continuing to advance. The retaining structure of the No. 3 working shaft has been completed, and construction has now shifted to earth and rock excavation and support erection.

It is reported that the Shenzhen-Jiangmen High-Speed Railway connects five cities—Shenzhen, Dongguan, Guangzhou, Zhongshan, and Jiangmen—with a total length of about 136 kilometers. Once the project is completed, it will be of great significance for improving the construction of high-speed railways in the eastern and western wings of Guangdong Province, building a half-hour living circle and economic circle in the Guangdong-Hong Kong-Macao Greater Bay Area, accelerating the establishment of the "one core, one belt, one region" regional development pattern, and radiating and driving the coordinated regional development of eastern Guangdong, western Guangdong, and the Pearl River Delta.