A kind of construction method of PCC pile in hard soil site

Abstract

The invention discloses a construction method of a PCC pile in a hard soil site. A movable valve pile shoe is arranged in the pile mold inner tube; the length of the pile mold outer tube is increased, and after the pile driver is in place, the pile mold is taken from the center of the pile position Soil of equal cross-section. The length of the outer tube exceeds the length of the closed spud can, and the pile tip formed by the spud can is inwardly inclined. During the vibration sinking process, the pile form mainly produces an inward horizontal component force on the pile core soil, so that the pile core soil Internal deformation, filling the reserved cavity, little disturbance to the pile side soil, and at the same time reducing the extrusion stress of the pile core soil on the inner pipe during the pile formwork driving process, reducing the difficulty of mold sinking; and reducing the pile formwork lifting During the process, the side frictional resistance of the pile core soil to the inner pipe reduces the rising force of the pile core soil. The invention is simple in structure, easy to realize, easy to operate, low in cost, can effectively reduce the difficulty of sinking molds in the hardened soil layer and the rise of pile core soil, and is an efficient and practical method in 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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