March 26，CCTV《Morning News》Construction of Chizhou Yangtze River Rail-cum-Road Bridge Based on XCMG Large Tonnage Rotary Drilling Rig。

Chizhou Yangtze River Railway Bridge is a control project of Hefei-Chizhou Intercity Railway, which is about to start construction.，After the completion and operation of the bridge，Will becomeThe sixth highway and railway bridge across the Yangtze River in Anhui Province。

In the Chizhou section of the Yangtze River, the construction site in the river is about 380 meters away from the South Bank embankment.，With a XCMGXR800HDRumbling start of large-tonnage rotary drilling rig，Successful drilling of the first main pier of Chizhou Yangtze River Rail-cum-Road Bridge，It marks the full start of the main project of the bridge.。

It is reported that，On March 24, the No.4 main pier of the bridge was drilled.，Foundation to be 77 PCs, dia. 2.8 m bored pile，Pile foundation shall be designed as per friction pile.，Weakly weathered silty mudstone is used as bearing stratum，The design pile length is 112m.，Design concrete volume of single pile: 689 cubic meters。Special geological and hydrological conditions and overlength、Construction features of ultra-deep bored pile，It brings some difficulties to the construction of pile foundation。

The XCMG rotary drilling rig needs to drill each pile foundation to a depth of 138 below the working platform.5 meters，The average completion time of each borehole is about one week.，High standards、Efficiently meet project needs。

And before that.，The large-tonnage rotary drilling rig of XCMG has been used in the river-crossing project in Anhui“Great military exploits”，Successful participation in the constructionMaanshan Yangtze River Rail-cum-Road Bridge、Tongling Yangtze River Rail-cum-Road BridgeAnd other super bridge pile foundation operation，XCMG Rotary Drilling Rig with Super Torque、Super large aperture、Pile-forming advantages of ultra-deep drilling，Pile foundation laid to the bottom of the river，Let the bridge stay on the river for a long time.。

South cable tower of Chizhou Yangtze River Rail-cum-Road Bridge is 274 in height..5 meters，The north cable tower is 282 high.5 meters，They are all space diamond-shaped reinforced concrete bridge towers with beautiful shape.，Have“Bridge in the sky”A good reputation。Downward drilling depth of XCMG large-tonnage rotary drilling rig，For this one“Sky Bridge”Ramming base platform、Erect columns and beams，Let the natural moat become a thoroughfare，Promoting the High Quality Development of the Yangtze River Delta Economic Belt！