Construction method of excavated pile with pile top elevation below natural ground

Abstract

The invention discloses a construction method for a digging pile with the pile top elevation below the natural ground. The method comprises the steps that a digging pile hole is dug in the natural ground; a pile reinforcement cage is mounted in the dug digging pile hole; an embedment column leg is mounted in the digging pile hole in a positioned mode; pile concrete is poured into the digging pile hole till the pile top elevation; and earth above the pile top elevation of the digging pile is dug. Through the modes that construction of the digging pile is conducted at first instead of excavating the earth, and a construction person performs positioning mounting of the embedment column leg in the pile top before pouring of the pile concrete, on the one hand, the project period can be shortened, road maintenance is avoided, and cost is reduced; on the other hand, the mounting precision of the embedment column leg can be accurately mastered, and the embedment column leg is prevented from shifting in the pouring vibration process of the pile concrete, so that accurate positioning of a supporting steel column of an upper main building structure mounted based on the embedment column leg is ensured.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for constructing hole-digging piles whose pile top elevation is below the natural ground. Background technique [0002] Manual digging pile refers to the pile that is made by manual excavation, and then the steel cage is placed, and the concrete is poured. Manual hole-digging piles are generally thicker in diameter, and the thinnest is more than 800 mm. They can bear structural bodies with fewer floors and higher pressure, and are currently widely used. Set caps on the top of the piles, and then use the caps to tie and connect them. The top of the piles is equipped with steel column embedded parts, which are used to locate and install the load-bearing steel columns of the superstructure, so that the force of each pile is evenly distributed. , to support the entire building. Therefore, the installation accuracy of the steel column embedded parts directly affects the...

AI Technical Summary

Problems solved by technology

However, when the pile top elevation is below the natural ground, especially when it is 2 meters or less below the natural ground, it is impossible to accurately embed the steel column embedded parts directly on the natural ground.

[0004] At present, when the elevation of the pile top of the artificially excavated pile is 2 meters below the natural ground, the soil layer is first excavated to the elevation of the cap cap, and then the manual excavation pile is carried out. The construction is convenient and the positioning is simple. The disadvantages are: the earth excavation takes a long time, and the site needs secondary road repairs.

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