In areas with complex terrain and high demand for road construction, asphalt distributors are essential equipment for pavement construction. The compliance of their implementation directly impacts the final pavement quality. This article details the key aspects of the asphalt distributor project process in complex terrain, from preliminary preparation, on-site construction, to final completion. This will help construction personnel master key operational details and improve project efficiency and quality.
Preliminary Preparation Phase: Scientific Planning is the Foundation of the Project

In areas with complex terrain, especially mountainous areas with varied terrain, asphalt distributors require multi-faceted preparation before construction. First, technicians survey the construction site based on the design drawings to determine the distribution range, thickness, and treatment plans for special sections (such as curves, ramps, and bridge expansion joints). A comprehensive inspection of the distributor, including core components such as the asphalt pump, spreader width adjustment device, and heating system, ensures stable operation in high-altitude conditions. At the same time, asphalt materials were purchased and stored in advance, with modified asphalt suitable for Yunnan's climate being selected. The temperature was maintained at 160-180°C in constant temperature storage tanks to prevent low temperatures from affecting even spreading.
On-site construction phase: Precise operation ensures spreading quality.
During the construction phase, the principle of "trial spraying before formal operation" must be strictly adhered to. Before formal spreading, a 100-200 meter section of road was selected for trial spraying. By adjusting the spreader's speed, nozzle angle, and asphalt pump pressure, the spreader was tested to ensure that the spread rate met the design requirements. For example, on sections with slopes greater than 15%, the speed should be reduced to 1.5-2 meters per second to prevent asphalt accumulation due to gravity. On curves, the spreader width should be appropriately reduced to prevent overflow from the edges. During operation, the driver must maintain real-time communication with the controller, adjusting the spreader's position through hand gestures or the intercom to ensure a 10-15 cm horizontal overlap, ensuring a continuous and seamless spread layer. Furthermore, after every 500 meters of construction, the spread thickness is sampled and tested using a measuring instrument. Any deviations are promptly adjusted.
Post-Construction Finishing and Quality Inspection: Detailed Control Enhances Project Standards
After construction is complete, the spreader must be thoroughly cleaned to prevent residual asphalt from solidifying and clogging the pipes. Specific steps include: flushing the spreader box and pipes with diesel fuel, activating the heating system to melt any residual asphalt and then discharging it; inspecting the nozzles for integrity, and promptly replacing any clogged or worn parts. During the quality inspection phase, the supervisor will assess the uniformity, adhesion, and thickness of the spread layer through core sampling and non-nuclear density testing. Any areas found to be too thin or too thick require additional spreading or milling and resurfacing. Furthermore, construction documentation, including spreading records, equipment operating parameters, and test reports, must be compiled to provide documentation for subsequent projects. Through meticulous management throughout the entire process, the Yunnan Asphalt Spreader Project will achieve the goal of "high-standard construction and high-quality delivery," laying a solid foundation for local highway construction.