Novel structure inclined inserting digging hole pile foundation

Abstract

The present invention relates to a novel structure inclined inserted excavation pile foundation which is composed of a vertical foundation pile (1) and an oblique cylinder (2) which is arranged at the top of the foundation pile. The invention is characterized in that the foundation pile (1) is established under the foundation (A1) to form a base supporting force-bearing point. The oblique cylinder (2) is obliquely inserted into the top of the foundation pile (1) and forms an angle alpha 1 with the top of the foundation pile (1). The top of the oblique cylinder (2) is extended with a tower legconnecting structure (3) which is exposed from the earth singly or with the top of the oblique cylinder (2). The top of the tower leg connecting structure (3) is provided with a plurality of bolt holes (3-1). The invention has the advantages of reducing the bending moment of pile shaft at the ground, improving the force bearing state of the foundation pile, facilitating the stability of the foundation pile and the whole pile body, and the invention also has the advantages of reducing the work capacity for digging the pile, saving concrete, economizing cost, increasing the working efficiency. The invention is suitable for the pile foundation of the high voltage power transmission circuit at the massif area.

Description

technical field [0001] The invention relates to a novel structure obliquely inserted and excavated pile foundation, which is an engineering pile foundation for an iron tower of a high-voltage power transmission line. The invention belongs to the field of iron tower foundation technology of power transmission line engineering technology. Background technique [0002] At present, in mountainous areas with relatively steep terrain, hole-digging pile foundations are generally used. Traditional high-voltage power transmission line projects mainly use straight column excavated piles, such as figure 1 As shown, the straight column digging pile in the prior art is mainly formed by a reinforced concrete cylindrical pile, and its cylindrical pile is composed of two parts, the buried underground section and the exposed ground section. The main defect of such a structural form is: the straight column digging For hole pile foundation, since the pile body is exposed to the ground, the h...

AI Technical Summary

Problems solved by technology

Traditional high-voltage power transmission line projects mainly use straight column excavated piles, such as figure 1 As shown, the straight column digging pile in the prior art is mainly formed by a reinforced concrete cylindrical pile, and its cylindrical pile is composed of two parts, the buried underground section and the exposed ground section. The main defect of such a structural form is: the straight column digging For hole pile foundation, since the pile body is exposed to the ground, the horizontal force at the top of the pile has a large bending moment on the pile. Therefore, such a straight column digging pile is not conducive to force transmission, and the diameter and length of the pile required for calculation are relatively large. On the one hand, the excavation requires a large amount of earth and damage to vegetation, and on the other hand, the amount of concrete used is large, which is not only uneconomical, but also requires a relatively large workload.

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