Construction method of hard soil field PCC pile

Abstract

The invention discloses a construction method of a hard soil field PCC pile. A valve pile shoe is arranged in a pile mold inner pipe; the length of a pile mold outer pipe is increased; and after a pile machine is in place, soil having the same section with a pile mold is taken in the center of a pile position. The outer pipe is longer than the closed valve pile shoe; a pile tip formed by the valve pile shoe is inwards inclined; in the vibration mold sinking process, the pile mold mainly generates inward horizontal component force on pile core soil, so that the pile core soil is inwards deformed to fill a reserved cavity, and the disturbance on pile side soil is little; meanwhile, the extrusion stress of the pile core soil on the inner pipe is reduced, and the mold sinking difficulty is reduced in the pile mold driving process; and in the pile mold hoisting process, the side friction resistance of the pile core soil on the inner pipe is reduced, that is, the ascending force of the pile core soil is reduced. The construction method is simple in structure, easy to realize, convenient for operation and low in cost, can effectively reduce the mold dipping difficulty on the hard soil layer and the ascending force of the pile core soil, and is an efficient and practical method in the PCC pile construction.

Description

technical field [0001] The invention relates to a pile foundation construction method, in particular to a PCC pile construction method on a hard soil site. Background technique [0002] Pile foundation refers to a deep foundation composed of piles and pile caps (referred to as caps) connected to the top of the piles or a single pile foundation connected by columns and pile foundations. The classification of eucalyptus construction methods mainly includes prefabricated piles and cast-in-place piles. Prefabricated piles are various materials and various forms of piles (such as wooden piles, concrete square piles, prestressed concrete pipe piles, steel piles, etc.) made in factories or construction sites. into or vibrate into the soil. Cast-in-situ piles are also called cast-in-place piles, which refer to forming holes directly on the foundation of the designed pile position, placing steel cages or no steel bars in the holes, and then pouring concrete into the holes to form p...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of mold sinking difficulty and pile core soil rising due to soil compaction in the construction process of PCC piles on hard soil sites, and overcome the above-mentioned defects caused by mold sinking difficulties and pile core soil rising , providing a construction method for PCC piles in hard soil layers

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