Recently，China's First 500 KV Provincial Digital Power Grid Project——Hainan 500 KV main grid project has been fully constructed.。At the construction site of Changjiang County in the west of Hainan Island，Full operation of Zoomlion rotary drilling rig，Overcome difficulties such as complex geological conditions，And realize efficient pore-forming，Lay a solid foundation for the construction of this major project。

▲Zoomlion Rotary Drilling Rig Helps Build China's First 500 KV Provincial Digital Power Grid Project（Image source：CCTV News）

Hainan 500 KV main grid project is a national project.“Fourteen five”Power Development Planning Project，It is also a necessary project to ensure the transmission and absorption of nuclear power and offshore wind power in Hainan Province.，After completion，China's Mainland Will Achieve Full Coverage of 500 KV and Above EHV Power Grid。In one of its key sub-projects, Hainan Changjiang Nuclear Power Phase II Access System Project，Two sets of ZoomlionZR180GThe rotary drilling rig is responsible for the hole formation of the pile foundation on site.。

According to the project manager,，The local strata in Hainan are complex and changeable.，The rock formation varies in height，Difficulties in the construction of ordinary rotary drilling rig equipment，Hole collapse is easy to occur in sandy soil layer，Intermediately weathered granite encountered，The consumption of cutting pick is large.，It is also prone to the problem of difficulty in taking cores.。ZR180GRotary drilling rig with high stability、High efficiency、High-precision construction features，Can realize one-time hole for，Highly in line with the needs of the project，Compared with similar products, the construction performance is better.。

▲Zoomlion rotary drilling rig is in operation

“Site 1.Holes of 2m pile diameter account for 90%，1.5 m and 1.8m pile diameter is mainly across the bridge，Account for 10%，Disposable pore-forming scheme adopts modulated mud。Facing moderately weathered rock formation，We use 1 instead.Drilling with 8m high roller barrel drill，And that consumption of the pick is reduce，Take out the complete rock core，Improve construction efficiency by improving construction method。

ZR180GRotary drilling rig with luffing，Supported by double oil cylinder，Rock entry is more stable，Heavy duty track lengthening、Widening，Make construction more stable，Power head with high torque and high speed，Strong weathered stratum can be drilled，Throw the soil easily，The customer is very satisfied with the hole forming efficiency and the overall effect.。”Zoomlion rotary drilling rig field service engineer said.。

In recent years，All parts of China actively and steadily promote carbon peak and carbon neutralization,Speed up the construction of clean and low carbon、Safe and efficient energy system。Face high standards、High demand，Zoomlion Equipment is performing with excellence in performance and construction.，Take on wind power、Nuclear Power、Electricity、The main force of project construction in petrochemical and other fields。