Pile extractor and construction method for pile extraction

Abstract

Disclosed is a pile driver which is composed of five parts, including a high pressure pump system, an air compressor system, a sleeve system, a vibratory sink piling system and a hoist system. A four-way joint(28)is arranged on one side of the water storage tank of the high pressure pump system and each tie-in is connected with a flush pipe; the flush pipes are respectively connected to flush pipes at the top parts of the four protecting jackets on the external wall of the sleeve through hollow bolts. A four-way joint is also arranged at one side of the air compressor and four inflation tubes drawn out are respectively connected with the inflation tubes at the top parts of the four protecting jackets. The bottom of each protecting jacket is provided with a water-gas mixture injector and is welded on the external wall of the sleeve. The top parts of the injectors are connected with the flush pipes and the inflation tubes inside the protecting jackets and each injector is provided with three spouts which align with the three tiny holes on the wall of the sleeve. The injectors eject high-pressure water-gas current to incise the soil around the pile to be pulled out, thus reducing the resistance between the pile to be pulled out and the surrounding soil. The pile driver will not break the pile to be drawn out and makes large-scale pile pulling possible.

Description

technical field [0001] The invention relates to a building foundation engineering construction machine—a pile extractor and a pile-extracting construction technology thereof, in particular to an I-type pile-extractor and a pile-extracting construction method thereof. Background technique [0002] With the rapid development of urban construction, many industrial and civil buildings with piles will be demolished, and then new buildings will be built on the site. At this time, the piles under the original buildings have become obstacles to construction and must be removed; , During the construction of the subway, the piles of the original buildings in the area where the line passes will also become obstacles to the construction and must be removed. Therefore, the extraction work of piles is increasing. [0003] So far, there are also a group of experts at home and abroad trying to design construction machinery for pulling out existing piles in the ground. If someone directly ...

AI Technical Summary

Problems solved by technology

[0004] However, after the pile has been driven into the ground for a long time, the soil around the pile has been squeezed with high strength, which not only makes the strength of the soil around the pile higher than that of the original soil, but also the pile and the soil around the pile have been integrated. The resistance between the pile and the soil around the pile is no longer the resistance at the time of the original design. It not only exceeds the compressive strength of the concrete of the pile itself, but also far exceeds the tensile strength of the pile itself. Therefore, using existing construction machinery and its construction methods It will cause the pile to be pulled out when it is pulled up

At present, only shallow piles or small piles of a few meters can be pulled out. As for multi-section deep piles of nine meters or more, there is no special pile extractor equipment at present.

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