en.Wedoany.com Reported - China Railway Construction Heavy Industry's micro pipe jacking machine recently completed the first section breakthrough in the Managua sewage expansion project in Nicaragua. This is the first pipe jacking equipment introduced to Nicaragua and the first time domestically produced pipe jacking equipment has entered the municipal sewage infrastructure sector in Central America. The equipment was custom-designed for the complex working conditions of the project, adopting a highly integrated segmented main engine design with a compact structure and comprehensive functional configuration, suitable for small launching and receiving shaft construction scenarios, effectively reducing the amount of excavation. During the construction of the first section, the equipment operated smoothly and efficiently, achieving an average daily advance rate of 10 meters, completing the jacking task on schedule and laying the foundation for subsequent construction.
On June 22, the first pipe jacking machine exported by China Railway Construction Heavy Industry to Dubai arrived smoothly at the local site. The equipment is designed for construction conditions such as high temperatures, water scarcity, small working shaft launching, and rapid relocation in Dubai. It adopts a highly integrated overall machine design and is equipped with a stepping propulsion system and heat dissipation technology for confined spaces, significantly improving adaptability to working conditions. The equipment will soon be transported to the construction site for use in local municipal pipeline network construction.
On June 21, the pipe jacking machine independently developed by China Railway Construction Heavy Industry assisted in the successful breakthrough of the DN2400 pipe jacking section of the Chaoyangpo Tunnel in the Guangxi Ring Beibu Gulf Water Resources Allocation Project. This section is 1,095 meters long, mainly traversing sandstone interbedded with mudstone and alternating layers of sandstone and mudstone. During construction, it faced geological challenges such as high-pressure groundwater, alternating soft and hard surrounding rock, clay adhering to the cutterhead, and fault fracture zones. The equipment was specifically configured with an efficient rock-breaking system, bentonite automatic grouting system, and long-distance high-precision guidance system, achieving a maximum daily advance rate of 12 meters, providing equipment support for the project's progress on schedule.
In addition, the world's first three-pipe curtain machine "Lucheng Hao," developed by China Railway Construction Heavy Industry, has advanced over 50 meters in the pipe curtain structure project of the Sanya Estuary Channel, successfully overcoming technical challenges posed by complex working conditions such as upper soft and lower hard strata, high-strength rock layers, and clay mud cake formation.
In recent years, China Railway Construction Heavy Industry has deeply cultivated the field of underground pipeline construction equipment, forming a full series product matrix covering hard rock pipe jacking machines, retractable pipe curtain machines, pipe jacking shields, rapid pipe jacking machines, and combined pipe curtain machines, continuously providing equipment support for underground space development and infrastructure construction both domestically and internationally.
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