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September 04, 2023

Water-rich sand geology with soft upper part and hard lower part

Traditional slotting machines are at their wits' end?

XCMG Complete Piling Machinery in Qingdao Metro Line 9

“Running water”Homework

Not only perfectly grooved,It also advanced the construction period by half a month.

The other day,Bid Section 1 of Phase I of Qingdao Metro Line 9 Completed the First Super-dangerous Project of Zhengyang Middle Road Station 16 Days Ahead of Schedule——Construction of underground continuous wall。

The total length of Zhengyang Middle Road Station is 155 meters.,The depth of foundation pit is about 31.5 meters,Standard section width 23.5 meters,It is an underground four-storey double-column three-span frame structure.,It is the only four-storey station on Line 9.,The average depth of the diaphragm wall is about 36.5 meters,It is the deepest diaphragm wall since the construction of Qingdao Metro.。

Face to water-rich sand geology with soft upper part and hard lower part,The construction party needs to overcome the high permeability of the formation.、Poor self-stability、Strong mobility,It is easy to collapse in the process of trench formation.、Piping and other problems。For this reason,Innovative adoption by the Project Department“Rotary drill+Grooving machine+Double Wheel Milling”Grooving process。

XCMG technicians and project personnel conduct comprehensive research and analysis,Provide suggestions for project selection,Dynamically adjust the construction process,Finally, XCMG is adoptedXR420ERotary Drilling Rig、XG700EUnderground continuous wall Hydraulic Grab bucket、XTCJoint attack of 120 double-wheel slot Milling Machines,Cooperate with rotary drilling to guide hol+Grab grab+Method for milling rock stratum by slot-Milling Machine,Three XCMG piling machines“Running water”Homework。

XR420EThe Rotary Drilling Rig takes the lead in construction and drilling to guide the hole,XCMG diaphragm wall Hydraulic Grab grab a certain depth,Hard rock formation is milled by XCMG Double Wheel Milling,Maximize the efficiency of complete construction!

Drill into hard rock、Grasp and mill into a wall。 XCMG completed the construction of diaphragm wall in only 75 days with a complete set of Piling Machinery,15 days ahead of schedule,It has effectively ensured the smooth progress of the follow-up construction tasks.。

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