Xihoumen Rail-cum-Road Bridge

“The world's first diamond”XugongXR1600ERotary drilling rig

Less than half a year

Take the lead in completing 8 main piers 6.3m super-large diameter drilling task

The construction efficiency is far ahead！

December 9，Good news from the construction site of Xihoumen Rail-cum-Road Bridge，XugongXR1600ERotary drilling rig takes the lead in completing the main pier 6 of the bridge.3m super-large diameter bored pile，Much earlier than the planned construction period。

Xihoumen Railway Bridge is the control project of Yongzhou Railway.，The total length of the bridge is 3118 meters.，The bridge is a cable-stayed suspension cooperative system bridge with a main span of 1488 meters.，It is the largest highway and railway bridge in the world.。It is not only the construction risk caused by the complex marine environment.，The technical challenges faced by the project construction are far more than those of other bridge projects built or under construction in China.。

The main pier foundation of the bridge adopts 18 pieces of 6.3m super-large diameter bored pile，This isThe largest diameter bored pile foundation in China at present。Its pile depth is 106 meters.，The water depth is 66 meters，40m into the rock，Partial pile foundationThe deepest is 116 meters.。XugongXR1600ERotary drilling rig needs to pass through strongly weathered granite layer by layer，Weakly weathered broken granite、Cataclastic rock、Complex strata such as slightly weathered and broken rhyolite，Tamp the foundation of the bridge in the depths of the sea。

XR1600ERock drilled by rotary drilling rig

XugongXR1600EThe stratum of the construction platform where the rotary drilling rig is located is relatively hard.，And that subsea formation is plagioclase.，Adopted by the project partyHob type bit is reamed in four stages.，Ensure the verticality of the pile foundation。And that conventional stage reaming proces is broken.，And that grade times are reduce.，Take the lead in adopting 2 meters、3 meters、4.5 meters、6.Four-stage reaming process of 3m，Breakthrough step reaming 1.8 meter differential。

XugongXR1600ERotary drilling rig completes one pile in 10 days on average，Be on duty with almost full attendance，Complete the construction task of 8 piles in the project department with high quality。This is a challenge of machine and nature.，It is also an arena for equipment in the same industry.，Feedback according to site construction data，XCMG equipment efficiency is nearly 15% ahead%，Take the lead in completing the tasks assigned by the project department。

CCTV focusXR1600ERotary drilling rig construction

XugongXR1600ERotary drilling rig is the largest tonnage rotary drilling rig in the world at present.，Maximum drilling diameter 7.5 meters，Maximum drilling depth 190m，Split design of equipment，Quick assembly，Convenient transportation，The equipment performance is stable。

The first show is amazing！

XugongXR1600EThe proud achievements of the rotary drilling rig

It marks a new step in the global pile foundation construction equipment.

Provide technical support for more super projects from drawings to reality！