China News Service, Zhanjiang, October 1 (Reporter Guo Jun) On October 1, the construction of the new Hepu-Zhanjiang Railway (Guangdong Section), managed and constructed by Xiamen-Shenzhen Railway Guangdong Co., Ltd. and constructed by China Railway Bridge Bureau Group Co., Ltd., reported another success. The first cast-in-place continuous beam of the Maizao River Bridge successfully completed the first phase of concrete pouring, achieving an important breakthrough in the construction of the bridge superstructure in the Guangdong section, laying a solid foundation for subsequent continuous beam closures, girder passages, and project progress on schedule.
The Hezhan-Zhan Railway is an important part of the national high-speed railway network covering the sea and coastal corridors, and is a key railway trunk line connecting Guangdong and Guangxi. The Guangdong section passes through Lianjiang and Suixi and connects to Zhanjiang West Station, with a design speed of 350 kilometers per hour. After the project is completed, it will further improve the layout of the high-speed rail in western Guangdong, open up the coastal transportation arteries of Guangdong and Guangxi, and empower the coordinated and high-quality development of the regional economy.
The continuous beams of the Maizao River Bridge under construction this time are among the most important and difficult projects along the entire line. They are the first continuous beams in the girder erection channel in the bidding section. They are only 5.8km away from the starting point of prefabricated box girder erection, and span oil pipelines. The pipeline protection and control standards are high and safety risks are prominent. After multi-party communication and repeated comparison and selection to optimize the protection plan, the project department finally decided to adopt the cover culvert protection type, and implemented on-site monitoring by dedicated personnel during the entire construction process to ensure the safety of oil pipeline operations in an all-round way. The continuous beams are cast-in-situ construction using the bracket method, and the pumping one-time pouring forming process is used, which places extremely high requirements on construction organization and technical support.
The continuous beam has a total length of 177.5 meters and is poured in three stages. The first stage of concrete pouring has a concrete volume of 1,200 cubic meters and requires 15 hours of continuous construction. In the early stage of construction, the project department completed various pre-processes such as bracket erection, foundation hardening and preloading, steel bar tying, and formwork installation, and carried out multiple rounds of special acceptance inspections. Based on the hot and rainy climate in the south, special construction and emergency plans were formulated in advance. The entire pouring process is monitored by shifts and side stations to accurately control key links such as concrete proportioning, transportation, pouring, and vibration. The pouring speed and layer thickness are strictly controlled. Support settlement and beam deformation data are monitored throughout the process to ensure that every process is in compliance with standards and every construction detail is accurately controllable.
It is reported that the project department will anchor the overall construction goal, seize the construction window period, orderly promote the subsequent processes of the continuous beam and the construction of the main project of the entire line, strictly implement safety management and control, strictly control the project quality, promote the project construction with high standards, and strive to open the entire line to traffic as soon as possible, injecting strong momentum into the improvement of transportation quality, industrial upgrading, and people's livelihood development in western Guangdong.
