Construction Method of Stress Dispersion Type Stiffened Pile with Recoverable Anchor Bar

Abstract

The invention provides a stress dispersion reinforced pile with recyclable anchor bars. The reinforced pile comprises an anchorage body, a prestress anchor bar, traction anchor bars and bearing bodies. The anchorage body is a large-diameter swing-injected mixing cement soil or cement slurry, and the bearing bodies are pushed into the anchorage body through a drill pipe. After anchorage body maintenance reaches design strength, prestress anchor bar construction prestress locking is achieved. After anchorage is finished, the traction anchor bars are tensioned to pull a clamp into cavities of the bearing bodies, and the prestress anchor bars are separately connected with the bearing bodies. All the anchor bars are recycled from an anchored stratum by means of a dragger. The invention further provides a construction method of the reinforced pile. Construction maneuverability is high, stress is dispersed, anchorage force generated in soft soil is large, anchorage reliability is high, the anchor bar recycling rate is high, and construction is efficient. The anchor bars and an anchor are recycled, engineering manufacturing cost is reduced, underground obstacles are removed, and environmental friendliness of the anchorage construction technology is achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a support pile used in a deep foundation pit support project. Background technique [0002] In the commonly used slope and deep foundation pit support engineering, the prestressed anchor cable has a high anchoring force, and the formed pile-anchor support structure has been widely used. However, the anchoring of soft soil strata is the bottleneck of anchoring technology, because the frictional resistance of soft soil stratum is low and easy to generate rheology, which limits the application of anchoring technology. In addition, the prestressed anchor bars are made of steel strands, which often remain underground to form obstacles after the slope and foundation pit enclosures complete their missions, which also limits the application of this type of support. Therefore, forming a high anchoring force in the soft soil layer, controlling the deformation of the soft soil, a...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the technical problems and structural defects of existing anchor rods (cables) with low anchoring force, large anchoring deformation, and anchor reinforcement recovery, and provide a method that not only provides higher anchoring force, but also effectively controls deformation. Stress dispersion type stiffened piles with recyclable anchor tendons that can easily recover the anchor cables, and also provide the construction method of the stiffened piles

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