Implanted and grouted compound pile and construction method

Abstract

The invention relates to an implanted and grouted compound pile which mainly comprises a precast tubular pile, Y-shaped wing plates, solidified backfill soil, pile side grouting reinforcing bodies, high pressure grouting squeezing bodies, a pile bottom precast enlarged head and a pile bottom high pressure grouting enlarged head. The precast tubular pile is formed by combining and connecting a plurality of sections of tubular piles with one or various pile diameters; the bottom of the precast tubular pile is provided with the precast enlarged head; the Y-shaped wing plates are uniformly distributed outside the tubular pile in the ring direction; high pressure grouting tubes pass through cavities between the Y-shaped wing plates and the tubular pile and the positions of grouting tube orifices are adjustable; the high pressure grouting squeezing bodies are formed by continuously grouting at the designed positions at high pressure; and the solidified backfill soil is back filled into a cavity inside the precast tubular pile and the residual solidified soil is paved on the construction site. According to the invention, the enlarged pile head is formed at the bottom of the tubular pile and the grouting reinforcing bodies and the high pressure grouting squeezing bodies are formed outside the tubular pile, so that bearing capacity of the soil in different positions around the pile can be sufficiently played; and a drilling and earth borrowing technology is adopted to form a hole, and a soil compaction effect is small. Moreover, the invention further discloses a construction method of the implanted and grouted compound pile.

Description

technical field [0001] The invention relates to an implanted grouting composite pile and a construction method, in particular to a method that can form various grouting reinforcements on the side of the pile, can fully exert the bearing capacity of the soil at different positions around the pile, and reduce soil extrusion during pile construction. Effect of the new pile structure and its construction method. It belongs to the field of foundation treatment and is suitable for foundation treatment projects of municipal and construction projects with poor geological conditions and adjacent to tall buildings. Background technique [0002] my country has a vast territory and ever-changing geological conditions. Some buildings built on soft soil foundations often have problems such as large settlement, obvious differential settlement, and insufficient bearing capacity, which in turn affects the normal use and safety performance of the buildings. If municipal and high-rise buildin...

AI Technical Summary

Problems solved by technology

[0006] To sum up, the construction of prefabricated tubular piles is convenient, but the lateral frictional resistance of the piles is limited, most of them are end-bearing piles, and the usual pile construction is likely to affect the pile quality of adjacent piles

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