Drilling and milling double male | Fill the "progress bar" of subway construction!

Break the ground to show your strength, and show your strength in the rock! Walking into the construction site of Xixiang Park Station of Shenzhen Urban Rail Transit Line 15, the most eye-catching of the busy scene is the two "Sany Red" that towers into the sky - Sany SDC120 double-wheel groove milling machine and SR415R rotary drilling drill. This pair of Sany drilling and milling "golden combination" has been fighting day after day and has become the main force in the construction of the underground diaphragm wall of the project, and has refreshed the construction "progress bar" with outstanding performance.

Milling rocks and breaking stones, Sany dares to show the sword

Xixiang Park Station, which coordinates Shenzhen Line 15, has entered the construction stage of the enclosure structure, with about 200 underground diaphragm walls in the main body, with a groove section and wall thickness of 6 meters and 1 meter respectively, a depth of 28.4 meters, and a depth of about 10 meters.

According to the construction personnel, the project stratum contains a variety of soil qualities such as plain fill, silty clay and sandy clayey soil, and at the same time, fully weathered granite, soil-like strongly weathered granite and massive weathered granite are alternately distributed, and the natural compressive strength of the rock is up to more than 100 megapascals and unevenly distributed, and there are local faults. The complex geology has caused a lot of obstacles to the construction of the connecting wall of the project site, and also put forward a difficult test for the slotting accuracy and milling speed of the equipment. At the same time, a series of unfavorable factors such as dense pipelines, large excavation amounts, and complex and busy surrounding environments have become a "big mountain" on the construction party.

"In order to ensure the progress and final quality of the construction of the project site, we finally chose Sany Equipment after many considerations." In the face of such an arduous battle, the project team finally chose Sany SR415RRotary drilling rigsPilot hole, SDC120 double-wheel groove milling machine slotting construction, the facts also prove that this "golden combination" of drilling and milling has not failed the customer's trust in the Sany brand.

The golden combination ensures the construction efficiency

Since entering the site, Sany has been working hard day after day, using a variety of drilling and milling combination processes for construction, pressing the "acceleration button" for the construction of the project site. SR415 is a classic large triangular structure drilling rig, which is more stable in the construction of large hole deep pile hard rock formation. SR415 rotary drilling rig gives full play to the advantages of "stability + high efficiency" of Sany equipment, and effectively ensures the stability of the hole wall and the quality of hole formation during the drilling process by virtue of the strong and continuous power output and the intelligent adjustment system of the verticality of the drill mast.

The slotting performance of Sany SDC120 double-wheel groove milling machine is also outstanding. In the multi-day continuous construction, the advantages of Sany SDC120 double-wheel groove milling machine with high rock entry efficiency, high slag discharge efficiency, stable microfeed and high degree of intelligence effectively ensured the quality and efficiency of groove formation, and won high recognition from the project team. According to the data of a 28.4-meter groove section recorded by the on-site operator, in the rock with a strength of about 100 megapascals, the average comprehensive milling efficiency of the equipment reaches 50mm-60mm/hour, and a 6-meter groove section can be guaranteed to be completed in 4-5 days, and the construction of 8 groove sections has been completed with high quality as of mid-June, ensuring that the project progress is progressing as scheduled.

Conclusion

With its strong rock-breaking properties and efficient construction capabilities, Sany underground engineering equipment has been "frequently seen" in Shenzhen metro projects, and has contributed indispensable equipment assistance in the underground diaphragm wall projects of major stations. In the future, Sany Pile Engineering will continue to work side by side with construction customers around the world, and inject strong new quality momentum into China's transportation infrastructure with world-class hard-core equipment.