Pre-stressed anchor cable manual hole digging uplift pile and construction method thereof

Abstract

The invention discloses a manual hole digging uplift pile structure. The manual hole digging uplift pile structure comprises a pile body and one or more pre-stressed anchor cables used for increasing axial uplift resistance of the pile body. The axial pre-stressed anchor cables are arranged in the pile body, the upper ends of the axial pre-stressed anchor cables are anchored to the pile head of the pile body, and the lower ends of the pre-stressed anchor cables radially penetrate through the side wall of the pile body and are anchored to the formation around the pile body. Concrete is poured to the pile body of a manual hole digging pile, after the strength reaches the design strength, the uplift resistance of the manual hole digging pile is increased by stretching the pre-stressed anchor cables, and the pile body durability and the uplift bearing capacity can be greatly improved. The structure is easy to construct, construction is conducted in a sectioned mode, and the quality is controllable; when the manual hole digging pile bears upward uplift resistance, especially the manual hole digging pile of a montanic socketed pile with low side friction, through the structure and a construction method thereof, the uplift resistance of the manual hole digging pile can be effectively improved, and the durability of the manual hole digging pile body is greatly improved.

Description

technical field [0001] The invention relates to a manual hole digging pile, in particular to a prestressed anchor cable manual digging hole uplift pile and a construction method thereof. Background technique [0002] Manual hole-digging piles are widely used in pile foundation holes in bridge engineering, railway engineering, highway engineering, electric power engineering, water conservancy engineering and geological engineering. The pile foundation of artificially excavated piles generally bears compressive loads. However, in some special stress situations, artificially excavated piles bear upward pulling forces, such as anchor piles in suspension bridges, and partial tension transmission tower pile foundations. In clay strata and some rock strata, the side resistance of the artificial excavated pile is low, and the pile body is easily pulled out under the action of the upward pulling force, resulting in huge engineering accidents. In order to increase the pullout resista...

AI Technical Summary

Problems solved by technology

In clay strata and some rock strata, the side resistance of artificial excavated piles is low, and the pile body is easily pulled out under the action of the upward pulling force, resulting in huge engineering accidents

In order to increase the pullout resistance of manual excavated piles, in engineering practice, the side wall of the pile body is generally reinforced, or the method of pile top pressure is used. However, these methods increase the pullout resistance to a limited extent, and the pullout effect is not ideal.

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