Function: Excavate materials above or below the bearing surface with a bucket, load them into transport vehicles or earth-moving machinery, and unload them into the stockyard.

According to the bucket, excavators can be divided into front shovel excavators, backhoe excavators, pull shovel excavators and grab excavators. The front shovel excavator is mainly used to dig materials above the surface, while the back shovel excavator is mainly used to dig materials below the surface.

Step 2 Bulldozer

Functions: building dump, leveling automobile dump, accumulating scattered ores and rocks, leveling operation site and construction site, etc.

Bulldozers can be divided into crawler type and tire type. Crawler bulldozer has large traction force, small specific grounding pressure (0.04-0. 13MPa), strong climbing ability, but low running speed. Tire bulldozers have the advantages of high speed, flexibility, short operation cycle time, convenient transportation and transfer, but low traction, and are suitable for occasions that need to change sites frequently and work in the field.

3. Drum

Function: The roller relies on the gravity of the machine itself, which is suitable for all kinds of compaction operations, making the compacted layer permanently deformed and dense.

According to the grinding wheel of the invention, the grinding wheel structure comprises smooth grinding, groove grinding and sheep foot grinding. Smoothing is the most common application, mainly used for pavement compaction. It adopts mechanical or hydraulic transmission, which can compact the protruding part centrally and has high compaction flatness, and is suitable for asphalt pavement compaction.

4. Bridge erecting machine

Function: Equipment for placing precast beams on precast piers.

Classification, there are three kinds of bridge erecting machines in China, mostly used for erecting reinforced or prestressed concrete beams in sections, double cantilever bridge erecting machines,

Double-beam bridge erecting machine

5. Loading equipment

Function: Used for shovel, sand, lime, coal and other bulk materials. It can also be used for light shovel operation of ore and hard soil.

In highway construction, it is mainly used for the filling and excavation of subgrade engineering, the loading of aggregate and asphalt and cement concrete yards. Because it has the advantages of fast working speed, good maneuverability and easy operation, it has developed rapidly and become the main machinery in earthwork construction.

6, concrete mixer

Function: a machine that mixes cement, sand aggregate and water to make concrete mixture.

According to the nature of work, it can be divided into intermittent (batch) and continuous; According to the mixing principle, it is divided into self-falling type and forced type; According to the installation method, it is divided into fixed and mobile; According to the unloading method, it is divided into dumping type and non-dumping type; According to the structure of mixing drum, it is divided into pear type, drum type, double cone type, disk vertical shaft type and ring groove horizontal shaft type.

7. Motor grader

Function: Earth-moving machinery that uses scraper to level the ground. Grader is a kind of high-speed, high-efficiency, high-precision and multi-purpose earth-moving machinery. It can complete large-scale ground leveling, ditching, slope scraping, earth pushing, snow removal, soil loosening, compaction, cloth distribution, mixing, loading assistance and land reclamation for roads and farmland.