High limit rotary excavation: what is the construction know-how of rotary drilling rig?

Rotary excavation: Rotary excavators are also known as rotary drilling rigs and pile drivers. Rotary drilling rig is a kind of comprehensive roadheader, which has the characteristics of using multiple foundations, fast perforation speed, less pollution and high mobility. The short auger bit can be used for dry drilling, or wet drilling with a rotary bit in the case of mud protection. Rotary digging machine can be used with the hammer to dig hard strata, digging holes. The enlargement drill can enlarge the hole at the bottom of the hole. The drilling rig adopts multi-layer telescopic drilling rig, which has less auxiliary drilling time, low labor intensity, no mud circulation and discharge, and cost saving. It is especially suitable for urban construction infrastructure projects. So, high limit rotary excavation: what is the construction know-how of rotary drilling rig?

High limit rotary excavation: what is the construction know-how of rotary drilling rig?

1. Due to the heavy weight of drilling equipment, the construction site should be flat and spacious with certain hardness to avoid equipment sinking.

2. During the construction, check whether the drill bit has worn side teeth. When the drill bit is not closed, please repair it immediately.

3. When grouting for the first time, inject mud vertically into the center of the pile hole to prevent the mud from overflowing the bottom along the retaining wall and loosen the soil at the bottom of the retaining wall.

4. Because the clay layer is dug too deep, it is easy to form a neck. Strict control of drilling depth when drilling.

5. According to different geological conditions, mud management should be strengthened during construction, mud quality should be strictly guaranteed, and mud wall support should be guaranteed.

6. For the formation with particle size less than 100mm, the traditional drill bit can be used for soil excavation. During drilling, please pay attention to the filling after drilling to make the hole soft. The cutting angle must be reduced and the cutting angle must be reduced. In hard formation drilling, the drill bit should be a large cutting angle cone bit; in the local formation containing large pebbles, the drill bit must be a large hole cone bit; you can also use the drill bit to break, and then use the drill bit to drill. When using huge gravel with a diameter of more than 200mm or when there is a large stone prospector in the hole, a cylindrical drill or a ring drill can be used. Cut the cone from the hole wall and take it out.

7. When encountering hard soil, in order to speed up the drilling speed, you can drill a small hole and then drill.

8. Every time drilling, it is best to remove the soil on site to prevent the pit from being dug obliquely.

Pay attention to the civilized construction on site, fill the unused mud pit in time; strengthen the management of mud pit, prevent mud overflow, and clean up the sand collection in time. Every sewer should be marked and lighting facilities should be provided at night to prevent people from stepping on mud. With these skills, you can work more safely and efficiently. In fact, many skills, some senior teachers need to have a more comprehensive understanding and exchange more experiences. After fully mastering the construction skills of the pile foundation of the rotary drilling rig, you will be more satisfied with the rotary drilling rig. After the mechanic is familiar with the operation of the rotary drilling rig, he should also be familiar with various drilling tools, strata, construction technology, site turnover, etc.