Hard rock coring! XCMG Rotary Drilling Rig Tamping Bridge Pile Foundation

Under the warm sun in early winter，The Yangtze River is sparkling，Xugong Gold is shining。

In Ezhou City, Hubei Province，On the field about 50 meters from the riverside，3 setsXR580HDThe Rotary Drilling Rig makes a roar，This is the construction site of the main tower on the south bank of Shuangliu Yangtze River Bridge.，XCMG Rotary Drilling Rig Moves to Hard Rock on the Seabed，Use a stable pile foundation chassis.“Drag”Live on the bridge deck。

As the first bridge at the east gate of Wuhan，Shuangliu Yangtze River Bridge is the 40th bridge in Hubei Province.、The 12th Yangtze River Bridge in Wuhan，After completion, it will become an important traffic hard support for the integration of Wuhan metropolitan area and Wuhan, Hubei, Yellow River and Yellow River.。

Shuangliu Yangtze River Bridge is a suspension bridge with a main span of 1430 meters.，In the forefront of the same type of structure。The height of the main tower on the south bank is 212..75 meters，The tower height is in the forefront of the same type of bridges in China.。

On the south bank of Shuangliu Yangtze River Bridge，Three large XCMG Rotary Drilling Rigs are running continuously.，The pile diameter is 3 meters、Pile depth 30-40 meters of bored piles will become“An anchor”，Different from the previous bridge construction, this pile foundation construction is encountered in the drilling.“Tough bones”，Opening into the hard rock layer，Rotary drilling rig must grasp the dry season of the Yangtze River to carry out pile foundation construction。

XCMG rotary drilling rig stepped reaming and continuous drilling，Drill step by step deep into hard rock，Writing a New Record of Hard Rock Difficulty of Bridge Pile Foundation in the Yangtze River Waterway。

XCMG is responsible for the construction of the main pier of the main tower.XR580HDRotary drilling rig，This model belongs to medium and large tonnage drilling rig.，It has strong power、High pore-forming quality、Features of strong rock penetration ability，Its sufficient power reserve can satisfy plateau construction.，The power head can also select different modes according to the soil layer and the rock layer，Achieve in construction performance and cost reduction“Win-win”。

General Manager Li of Shuangliu Yangtze River Bridge Project Department of China Railway Major Bridge Engineering Bureau：

“Pile foundation construction in very hard rock areas is a great challenge。The geology of Ezhou is very hard.，It belongs to extremely hard rock，Equivalent to in“Diamond”Dig a hole in the wall.。The 3-meter bored pile is layered.，Make a small hole first.，Make a slightly larger hole.，Finally, it slowly expands into our pile foundation.。Although it is very tedious，But the rotary drilling rig did a very good job.！”

After the drilling rig enters the rock formation，Daily footage meets established target requirements，The hole forming efficiency of pile foundation in hard rock layer is greatly improved，Pile foundation of main tower of Shuangliu Yangtze River BridgeIt took only 8 days to complete the pouring of the first pile foundation.。

It is understood that，After the completion of the bridge construction，It takes only 20 minutes to speed up from Huarong to Xinzhou from the previous one and a half hours.。The completion of the Shuangliu Yangtze River Bridge will also promote the Wuhan National Aerospace Industry Base.、East Lake High-tech Industrial Development Zone and Gedian National Economic Development Zone are seamlessly connected.，Xugong Rotary Drilling Rig lays a solid foundation for the smooth development of Wuhu-Ehuang-Huanghai integration。

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