In order to help relevant personnel understand the relevant contents of rotary excavation pile foundation, Zhong Da Consulting has compiled relevant materials, and the basic contents are as follows:
What is rotary excavation pile foundation?
Engineering terminology 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 drilling pile in engineering. Because of mechanical operation, the number of workers is not high, which can save a lot of labor costs.
Construction technology of rotary excavation pile foundation;
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 rock-soil layer with good cohesiveness, dry drilling or clear water drilling can be used without mud wall protection. 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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