Completion of Concrete Construction of Main Pier Pile Foundation of Hongqili Waterway Railway Bridge on Shenjiang Railway

of May 24, the pile foundation pouring of the main pier on Zhongshan side of Hongqili Waterway Highway and Railway Bridge on Shenjiang Railway was completed by the construction management of Jiangmen Engineering Construction Command of China Railway Guangzhou Bureau Group, the design of the Fourth Institute of China Railway and the construction of China Railway Bridge Bureau. So far, the concrete construction of the pile foundation of the two main piers of the bridge has been completed, sounding the "assembly number" of the project.

Shenjiang Railway is an important part of the coastal corridor of the national "eight vertical and eight horizontal" high-speed railway network, and also a major transportation infrastructure to support the construction of Guangdong-Hong Kong-Macao Greater Bay Area and Guangdong Free Trade Zone in China. According to Zhou Ping, deputy commander of Jiangmen Engineering Construction Command, the main line of the new Shenzhen-Jiangmen Railway is about 116 kilometers long, and the main bridge of Hongqili Waterway Highway and Railway Joint Construction Section is the control project of the whole line and the most difficult bridge to construct. The bridge is 1.41 kilometers long, with a main tower height of 258 meters and a main span of 808 meters, which is the largest asymmetric composite cable-stayed bridge with ultra-short side spans in China.

Hongqili Waterway Highway and Railway Bridge has eight piers, two of which are located in Nansha District of Guangzhou City and Minzhong Town of Zhongshan City. There are 70 pile foundations in the main pier, all of which are super-long bored piles with a diameter of 4 meters and a maximum drilling depth of 85 meters, which is the largest diameter bored pile in Guangdong-Hong Kong-Macao Greater Bay Area bridge engineering at present. Chen Shanting, the project manager of Shenjiang Railway Bid 8 of China Railway Bridge Bureau, introduced that the project team implemented "standardization, informatization, intellectualization and digitalization" management in the construction process, and adopted a number of advanced scientific technologies to effectively ensure the construction efficiency in the face of the characteristics of high groundwater level, thick silt and sand layer at the bridge site and high mobility affected by tides. In view of the difficult problems of 4-meter large-diameter bored pile hole cleaning and underwater concrete pouring, the technical team has formulated a feasible technical scheme for each construction process, and has taken many measures to ensure the quality of pile foundation.