📋 Tender Overview
A bridge flies over the Hongqimen of the Pearl River and Guangzhou and Zhongshan cities realize cross-river holding hands. On the morning of May 5 the Hongqimente Bridge of the South Central Expressway was successfully closed. The project is invested and constructed by Guangzhou Communications Investment Group and undertaken by China Railway Bridge Bureau and the interconnection of the Guangdong-Hong Kong-Macao Greater Bay Area has once again pressed the accelerator button.Create a new landmark in the Bay AreaLocated in the south of Nansha District and the northeast of Zhongshan City the Nanzhong Expressway is a 32.4-kilometer-long mega-bridge project connecting Guangzhou Zhongshan and Shenzhen which is an important part of the national expressway network G2518 and the Guangdong expressway network S78 and is also a major transportation infrastructure project in the Guangdong-Hong Kong-Macao Greater Bay Area. The main line of the project is 21.6 kilometers long starting from the Nansha Port Expressway Xinken Interconnection and ending at the Zhongjiang and Guangzhou-Macao Expressways the branch line is 10.7 kilometers long starting from the main line of the project and ending at the Lingding Ocean to connect to the Shenzhen-Zhong Channel.The Hongqimente Bridge in Helong has a total length of 1126520 meters and is a double-tower double-cable-faced steel box girder cable-stayed bridge with a main span of 178 meters which is a key control project of the South-China Expressway project. The height of the east and west towers of the bridge is 5.176 meters and meters respectively and the shape design of the main tower is inspired by the unique Lingnan characteristics of South China Sea drops and kapok bloom and the flowers of Guangzhou are moistened with the water of the Bay Area and the overall shape is light and lively tall and beautiful which is expected to become a new landmark in the Greater Bay Area.Intelligent manufacturing empowers productionIn the process of pile foundation construction the KTY4000 rotary drilling rig developed independently developed and the imported rotary drilling rig are used to drill holes supplemented by a series of intelligent control equipment such as black cyclone sediment separator pile worry-free ultrasonic hole detector worry-free concrete overfilling controller etc. the proportion of piles of one type reaches 100 overcoming the technical problems of ultra-thick soft foundation ultra-long pile construction.In the construction stage of the tower column Guangzhou Investment Group and China Railway Bridge Bureau optimized the construction plan and developed the assembly design automatic cutting factory production rapid installation variable section inclined tower steel skeleton section prefabrication installation quality rapid construction technology which transformed a large number of aerial work into ground operations reduced the amount of aerial work by more than 60 and effectively controlled construction safety and project quality. Faced with the heavyweight challenge of the total weight of the steel box girder of the Hongqimente Bridge of about 26 tons and the maximum lifting weight of a single section of about 460 tons Guangzhou Investment Group and China Railway Bridge Bureau have built a four-line and one system with the intelligent cutting production line of plate cutting intelligent welding production line of plate unit intelligent assembly production line of segment intelligent coating production line of steel box girder and intelligent control system of workshop manufacturing as the core so as to realize the intelligent manufacturing of steel box girder in the whole process.Achieve both quality and efficiency improvementThe bridge construction process has always adhered to innovation and empowerment and strived to create a century-old quality project of Ping An. The innovative use of built-in threaded tie rod climbing system successfully solves the force problem of the tower column formwork system with large camber angle and does not affect the removal of the formwork providing strong technical support for the smooth implementation of the project. Optimize the construction process of step top push and tower beam synchronization carry out the erection of side-span steel box girder at the same time as the main tower construction realize synchronous jacking longitudinal jacking and lateral correction during the erection process ensure the quality and safety of jacking construction and effectively save the construction period of about 3 months and realize the smooth closing of the Hongqimente Bridge. In order to solve the problems of fire resistance and anti-corrosion performance requirements of cables the management team has innovatively developed a new cable-stayed system that is fire-resistant waterproof and vibration-damping. Through standardized production factory production and fast installation the system greatly improves the comprehensive disaster prevention and mitigation capacity and service life of cable-stayed bridges on the basis of ensuring the bearing capacity of existing cables.
