Recently, Zoomlion's ZR180G rotary drilling rig helped kick off construction of the 500kV grid connection system project for Phase II of the Changjiang Nuclear Power Plant in Hainan. The ZR180G's efficient and precise performance and its one-pass hole-forming solution made it the optimal choice for the Hainan construction area. The project manager spoke highly of the equipment, and the tropical scenery of Hainan paired with the beautiful "Aurora Green" attracted local radio and TV reporters to come and film.

△ Zoomlion rotary drilling rig assists construction of the Hainan Changjiang Nuclear Power project

It is understood that the Hainan 500kV main grid project is Hainan's ** 500kV project and a necessary project to ensure the transmission and consumption of nuclear power in Hainan Province. The completion of the project is of great significance for adapting to the needs of Hainan's diversified energy input development and supporting the implementation of the major strategies of building the "One Zone, One Port" and "Three Zones, One Center" across the whole island of Hainan. After the project is completed, the Hainan power grid will officially enter the 500kV ultra-high-voltage era, achieving full coverage of a 500kV provincial digital grid for the first time in the country and becoming a new signature project of Hainan Free Trade Port construction. According to the project manager, Hainan's geological conditions are relatively uniform, mainly granite and basalt; the coastal strip areas are marine sediments consisting mainly of silt and sand layers. The strata are complex and variable, with rock layers at varying heights. Sand and soil layers are highly prone to hole collapse; in moderately weathered granite layers, cutter pick consumption is relatively high; and when moderately weathered rock layers are encountered, because the rock layers are highly intact, core extraction is prone to difficulty. All of this places extremely high demands on the stability and precision of the equipment.‍

△ Zoomlion rotary drilling rig in operation

In this project, 1.2m pile diameters account for 90%, while 1.5m and 1.8m pile diameters are mainly for bridge crossings and account for 10%. The one-pass hole-forming solution uses conditioned mud, raising the mud concentration to above 1.15, with the mud specific gravity greater than the rock pore pressure of 1.07. For moderately weathered rock layers, a 1.8-meter high roller-cone barrel drill is used for drilling to reduce cutter pick consumption. Through improved drilling methods, complete rock cores are extracted, improving construction efficiency.

Zoomlion's ZR180G features high stability, high efficiency, and high precision in construction and is suitable for various working conditions such as medium and large infrastructure and municipal construction. Its luffing mechanism uses dual-cylinder support for more stable rock drilling; it adopts a heavy-duty crawler structure design with lengthened and widened tracks for more stable construction; and its power head combines high torque with high rotation speed, enabling it to drill strongly weathered strata and easily discharge soil. It has won the trust and support of many customers in projects across the country.

According to customer feedback: "At present, the ZR180G is stable in construction and highly efficient in hole forming. Compared with equipment from other manufacturers, its high-efficiency and high-precision performance stands out, and the overall effect is very satisfactory!"

Zoomlion will continue to build efficient, intelligent, and reliable products and will also provide customers with all-round, one-stop, all-weather high-quality after-sales service, fulfilling its commitment to nanny-style service for large models. Adhering to the scientific and technological innovation philosophy of "technology is the root, products are the foundation," Zoomlion will create value for customers and join hands with more customers to walk the path of high-quality green development together!‍