Dry type pneumatic rock drilling pile-driving machine and working method thereof

Abstract

The invention relates to a dry type pneumatic rock drilling pile-driving machine and a working method thereof. The pile-driving machine is characterized in that the pile-driving machine consists of a pile frame, an upper power head, a screw drill rod, a lower power head, a steel pile casing, a pneumatic down-the-hole hammer, a 30-60 m<3> air compressor and a high-pressure gas transmission pipe. The working method is characterized by comprising the steps of: firstly, installing equipment; secondly, crushing the rock by the pneumatic down-the-hole hammer, and discharging the crushed soil mass and rock ballast out of a pile hole from a slag outlet by using a helical blade; and thirdly, protecting the walls of a construction soil layer, a sand layer and a cobble and gravel layer by using the steel pile casing. Compared with the prior art, the invention has the advantages of high rock drilling speed, dry type and environment-protection construction, clean construction site, and no mud pollution in rock drilling and pile pouring construction.

Description

[0001] Technology area [0002] The invention relates to the field of construction machinery, in particular to a dry-type pneumatic rock drilling pile driver suitable for construction of building foundation engineering and a construction method thereof. Background technique [0003] At present, the construction of rock-socketed bored piles in China, regardless of the use of roller cone bits or percussion drills, uses mud operations. The silt and clay in the pile holes are mixed into mud by the drill bit, and the mud is discharged out of the hole while pouring concrete. One cubic meter of mud is produced. For two cubic meters of mud, thousands to tens of thousands of cubic meters of mud needs to be shipped out for each foundation project, which not only increases the burden on urban traffic, but also often causes blockages in urban sewers, and it is still possible to drill into strongly weathered bedrock with roller cone bits or percussion bits. , For weathered-fresh bedrock, o...

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Problems solved by technology

[0003] At present, the construction of rock-socketed bored piles in China, regardless of the use of roller cone bits or percussion drills, uses mud operations. The silt and clay in the pile holes are mixed into mud by the drill bit, and the mud is discharged out of the hole while pouring concrete. One cubic meter of mud is produced. For two cubic meters of mud, thousands to tens of thousands of cubic meters of mud needs to be shipped out for each foundation project, which not only increases the burden on urban traffic, but also often causes blockages in urban sewers, and it is still possible to drill into strongly weathered bedrock with roller cone bits or percussion bits. , For weathered-fresh bedrock, one shift drills several to ten centimeters. For those with large diameters and inclined rock faces, the construction is more difficult, and it is easy to cause the drill bit to tilt with the rock face to form oblique holes.

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