Escape through the river and build a thoroughfare! Sany SDC120 double-wheel milling assisted in the construction of Dongguan's first underwater cross-river tunnel

Recently, the high-profile Dongguan first cross-river underwater tunnel - Hongfu West Road-Yinlong Road cross-river channel project has officially entered the construction stage of dry dock envelope structure, a total of more than 800 pieces of thickness of about 0.8m to 1m, depth of about 28.4m to 42m of the ground wall is in full swing into the groove construction, and for this "deep dragon" rock breaking is the Sany heavy weapon - SDC120Double-wheel groove milling machine。

Heavy weapons go into battle to forge a hidden dragon at the bottom of the abyss

According to the project personnel, the project is the first immersed tunnel project in Dongguan City, with a total length of 1.87 kilometers, of which the tunnel is about 1.54 kilometers long, composed of 3 pipe sections, prefabricated by the axis expansion dry dock method;

During the construction process, the project team needs to overcome a number of major difficulties, such as the large amount of rock excavation in the foundation groove, the narrow construction waters, the mixed and changeable mudstone at the bottom of the groove, and the tight construction period. The quality of the wall of the main enclosure structure is directly related to the safety and progress of the subsequent dry dock construction and immersed tube prefabrication project, and there is no room for sloppiness.

And this vast and arduous project has now become the best stage for Sany SDC120 double-wheel groove milling machine to "show its talents". Two Sany SDC120 double-wheel groove milling machines have worked together and fired on the north and south sides of the project, and have performed well in the operation mode of grasping, drilling and milling.

Force speed and create Seiko templates

"Fast, accurate and smarter" is the biggest evaluation of the performance of the SDC120 double-wheel groove milling machine by the front-line construction personnel. In the face of complex formations with different degrees of mudstone mixing and weathering, SDC120 double-wheel groove milling machine effectively realizes the precise control of milling, pumping and feeding by virtue of its advantages in intelligent control technology, micro feed and slag discharge efficiency; It can adapt to the needs of milling of rock formations of different hardness, and can achieve efficient slag discharge in different formations and different groove depths, so as to maximize the effective utilization rate of operating power. At the same time, the equipment is equipped with 12 sets of correction devices to support real-time correction, and can record and draw the data into groove curves in real time, which effectively ensures the quality and accuracy of groove formation, and has both the strength of rock breaking and the fineness of "threading needles".

In the 41m groove section data recorded by the on-site operator, it can be seen that in the rock formations staggered by medium and strong weathering, the average footage of the SDC120 double-wheel groove milling machine can reach up to 4m/hour, ensuring the stable progress of the construction with efficient construction. "Sany double-wheel milling not only has strong power, fast into the rock, but also a good hand at doing fine work, which has improved a lot of speed for our project construction!" The on-site operator was full of praise for the performance of Sany equipment.

Conclusion

Through the river and the earth, the moat becomes a thoroughfare! The performance of Sany SDC120 double-wheel groove milling machine in Dongguan cross-river channel project can be described as outstanding. On the road of helping the construction of major transportation projects and promoting the coordinated development of urban areas, Sany Pile Engineering will continue to make efforts to help build more benchmark projects with excellent quality, safety and reliability with high-quality equipment.