Construction method of bituminous coating pile in sandy foundation

Abstract

The invention discloses a construction method of a bituminous coating pile in a sandy foundation. The construction method is characterized in that the bituminous coating pile is hammered and driven under the protection action of a steel sleeve. The construction method specially comprises the construction steps that the steel sleeve penetrates through a backfill sandy soil layer and is driven into a soft soil layer laid at the bottom of the sandy soil layer; the bituminous coating pile in the steel sleeve is driven into a bearing stratum, and the steel sleeve is clamped, pulled and taken out through a vibratory hammer. Compared with the prior art, the construction method has the advantages that a bituminous coating is completely protected, the effect that negative friction is reduced through the bituminous coating is fully achieved, operation is easy, the project quality is reliable, the adaptability is high, the construction method is particularly applicable to a pile foundation project with the soft soil layer at the bottom and a thick backfill sandy foundation on the top in a covering mode, the problem of the negative friction can be effectively solved, and the construction quality of the pile foundation project is improved.

Description

technical field [0001] The invention relates to the technical field of pile foundation engineering, in particular to a construction method of asphalt-coated piles in sandy foundations. Background technique [0002] At present, the use of asphalt-coated piles in pile foundation engineering to reduce the impact of negative friction is a very mature technology. However, conventional asphalt-coated piles are used in soft soil foundations such as muddy soil or clay soil. When the asphalt-coated piles are directly beaten, the soil layer will cause relatively little damage to the asphalt coating due to the weakness of the soil that penetrates the soil layer. And has been ignored. With the needs of social development, land reclamation projects are gradually increasing, and the geological conditions are becoming more and more complex. It is often encountered that the upper part is thicker backfilled coarse sand or gravel soil layer and the lower part is the original sea mud layer. I...

AI Technical Summary

Problems solved by technology

With the needs of social development, land reclamation projects are gradually increasing, and the geological conditions are becoming more and more complex. It is often encountered that the upper part is thicker backfilled coarse sand or gravel soil layer and the lower part is the original sea mud layer. In this case When directly hammering the asphalt-coated pile, the damage of the upper backfill layer to the asphalt coating cannot be ignored, which will affect the reduction of negative frictional resistance

[0003] The asphalt-coated piles in the prior art are not suitable for the pile foundation project in which the underlying soft soil layer is covered with a thick backfill sandy soil layer, and cannot effectively solve the negative friction resistance, which affects the construction quality of the pile foundation project

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