Recently, the side wall construction site of Section 10 of Shenzhen Metro Line 15 welcomed a new "co-worker" — an intelligent vibrating robot. As automated vibrating equipment, the intelligent vibrating robot achieves precise control of side wall concrete vibration through an automated control system, which not only significantly improves the compactness and impermeability of concrete and enhances production efficiency and quality, but also lays the foundation for advancing rail transit construction toward "intelligent construction."

Achieving a precision revolution.In the forest of rebar in each side wall section, traditional manual vibration was once a "battle fought by feel." Workers had to shoulder 20-kilogram vibrators and bend and shuffle within a working gap only 80 centimeters wide, judging the vibration effect by listening for the muffled sound of concrete and watching for mortar bleeding. Under the "empiricist" construction model, later repairs were time-consuming and labor-intensive. To this end, the project department of Section 10 of Shenzhen Metro Line 15, together with equipment manufacturers, introduced a side wall vibrating robot for trial use, achieving precise operation by manually setting vibration points, frequency, and duration. "The concrete surface after vibration with the intelligent vibrating robot is as flat as a mirror," said Chen Qiang, the project chief engineer, illuminating the freshly poured side wall with a flashlight. "The side wall after demolding has no cracks and few bubbles. The compactness of the concrete after robot operation is stable at over 96%, above the standard requirements, solving the problem of large vibration errors often caused by uneven vibration depth in traditional manual work."

Driving efficiency improvement.Looking back at traditional construction scenarios, a vibration team of 8 workers had to work continuously for 6 hours amid the roar. Now, a 4-person control team can complete the entire process without heavy physical labor: an electrician monitors the stability of the equipment power supply, a commissioning technician previews the vibration path on screen, and two operators simply tap to confirm on the touch screen, and the intelligent vibrating robot starts in sync like a soldier receiving a military order. The efficiency improvement is also reflected in the visibly shortened construction period: in the past, a single pour took 10 hours, and workers had to rotate and rest every 2 hours; now the intelligent vibrating robot can operate continuously, compressing the time per pour to 7 hours, equivalent to completing 2 additional construction sections per month.

Supporting green construction.The construction environment has also improved simultaneously — operating noise is stably controlled below 65 decibels, and dust pollution is significantly reduced, fully meeting the environmental protection standards for nighttime construction in the urban core area. The working environment has also taken on a new look, and operators no longer need to be exposed to harsh construction conditions. This transformation has greatly reduced the labor intensity of workers and fundamentally reduced the harm to workers' health.

Subsequently, the project of Section 10 of Shenzhen Metro Line 15 will, based on this practice, comprehensively promote the standardized application of vibrating robots, continue to explore the integration of intelligent construction technologies, accelerate the transformation and upgrading from "traditional construction" to "digital intelligent manufacturing," and provide a replicable technical template for improving the quality of rail transit construction.