What is the difference between rotary drilling rig pile and bored pile?

Rotary excavation pile generally refers to the pile type constructed by rotary drilling rig, which is the full name of rotary drilling cast-in-place pile, and is referred to as rotary excavation pile in engineering. Because of mechanical operation, the number of workers is not high, which can save a lot of labor costs.

Bored piles are divided into bored piles and dug piles, which are mainly used in engineering construction.

Piles can be divided into two types according to hole-forming methods: bored piles and dug piles. Digging piles are dug manually, and drilling piles are drilled mechanically, depending on different machines. Bored piles are made of underwater concrete and can be divided into the following categories.

1, hole formation by impact drilling machine: suitable for soft stratum.

2. Rotary drilling rig drilling: suitable for hard stratum or gravel stratum, backfill soil and other complex geological conditions.

3. Borehole formation by casing drilling machine: it is suitable for the stratum with flowing sand and groundwater.

4, rotary drilling rig hole.

5. Drilling under karst geological conditions

6, reinforcing cage, concrete

7. Deep-water bored pile fixed platform

The construction methods of mechanical bored pile and rotary bored pile are different.

The construction of bored pile is divided into two types: mud wall protection method and full pipe construction method.

The rotary drilling rig firstly breaks the rock and soil through a cylindrical drill bit with a valve at the bottom, and directly loads it into the drill bucket, and then the drill bucket is hoisted out of the hole by the lifting device and telescopic drill pipe of the drilling rig to unload the soil, so as to repeatedly borrow and unload the soil until the drilling reaches the design depth. For the geotechnical layer with good adhesion, dry drilling or clean water drilling can be used, and mud is not needed to protect the wall. For loose and easy-to-collapse stratum, or stratum with groundwater distribution and unstable hole wall, static mud wall protection drilling technology must be adopted, and wall protection mud or stable liquid must be injected into the hole to protect the wall.

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