Construction machinery used for large diameter hollow pile and its construction method and use

Abstract

The invention discloses a construction machine for hollow piles with large diameter and the construction method and usage, which comprises a drilling system, a pile pounding system, a drainage system which are integrated into one part. The pile forming method comprises: a high-spray drilling bit is arranged on a steel tube (a protection cylinder) or on the bottom of an inner hole of a pre-made tube pile for hole drilling and mud making; the mud is drained from a water joint or a drainage pipe; the protection cylinder or tube pile is pressed asynchronously or synchronously along with the drilling bit; during pile-sinking process, water mud is sprayed to the outer soil of the hole to solidify the surrounding soil of the pile and fill the gaps between the pile and surrounding soil of the pile; after the drilling bit reaches certain depth, the water mud is again sprayed to solidify surrounding soil of the pile; lifting the drilling bit; putting down reinforcement cage; casting concrete for piling. The invention is a construction method for foundation piles and drilling with large diameter, super long and high load, which especially provides convenient, labor-saving, rapid and economical equipment and method for marine pile driving.

Description

Technical field [0001] The invention relates to a building construction machine and a construction method thereof, in particular to a construction machine for a large-diameter hollow pile used for a large-diameter foundation pile or a pipe jacking crossing project, and a construction method and application thereof. Background technique [0002] The existing large-diameter and large-load foundation piles mainly include bored piles, precast piles, etc.; bored piles are formed by positive and negative circulation drilling, rotary drilling and spiral drilling, and gyro drilling. Equal pore method. The above methods have the disadvantages of slow hole formation speed and difficulty in wall protection (especially liquefied sand), and the pile diameter and length of the precast piles are limited, and they encounter silt, silt or pebble, weathered rock, etc. It is difficult to sink piles in all stratum, and it is easy to blast the tip of the pile or squeeze the pile body, which results i...

AI Technical Summary

Problems solved by technology

The above-mentioned methods respectively have the disadvantages of slow hole forming speed and difficult wall protection (especially liquefied sandy soil), while the pile diameter and pile length driven into prefabricated piles are very limited, and when encountering silt, silt or pebbles, weathered rocks, etc. It is difficult to sink piles evenly in the ground, and it is easy to blow up the pile tip or squeeze the pile body, which will cause the load capacity of the pile to be very limited

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