Pile extraction construction method

Abstract

The invention discloses a pile extraction construction method. The method is characterized by separating pipe pile which is embedded in ground from surrounding soil mass thereof by pounding of high-pressure jetting with a jetting pore-forming machine so as to greatly reduce or eliminate cohesive force between the pipe pile and the surrounding soil mass thereof, thus facilitating pile extraction construction. The method is characterized by creating pores to remove the cohesive force between the pipe pile and the surrounding soil mass thereof, then extracting a pile by a crane with corresponding tonnage. The method has the advantages of simple operation, safe and reliable property and high operation efficiency, and is applicable to pile extraction in water, dry land and soft ground layers with various diameters and depths.

Description

technical field [0001] The invention belongs to the technical field of civil engineering and water conservancy engineering construction, and in particular relates to a pile pulling construction method. Background technique [0002] With the development of the economy and society, there are more and more old buildings or other civil engineering projects that are demolished, expanded or newly built. Therefore, in the newly developed base, many engineering piles left in the ground by the old buildings have become obstacles to construction and must be removed. Demolition, in order to implement new construction. After the pile is driven into the ground for a long time, the soil around the pile is squeezed by high strength, which not only makes the strength of the soil around the pile higher than that of the original soil, but also connects the pile and the soil around the pile together. The resistance between the soil around the pile is no longer the resistance when it was origi...

AI Technical Summary

Problems solved by technology

After the pile is driven into the ground for a long time, the soil around the pile is squeezed by high strength, which not only makes the strength of the soil around the pile higher than that of the original soil, but also connects the pile and the soil around the pile together. The resistance between 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 exceeds the tensile strength of the pile itself. The multi-section pile cannot be pulled out with existing construction machinery and construction methods.

Some use the method of directly putting steel cables on the piles to be pulled out, and using jacks or cranes to pull them out. This method is suitable for pulling out shallow buried and relatively small piles, but not for larger and thicker piles. ; Some also use special-purpose hydraulic pile extractors, which are mostly imported, expensive, high construction costs, high requirements for construction sites and energy, and high requirements for pile head strength. General pile extraction projects are difficult This pile pulling method is applicable; there are various types of water jet hole forming devices in China, but there is no precedent for using these devices for pile pulling construction

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