Post-insertion unbonded steel strand U-shaped pipe pressure-bearing type uplift pile and construction method thereof

Abstract

The invention relates to a post-insertion unbonded steel strand U-shaped pipe pressure-bearing type uplift pile and a construction method thereof. A drilling machine hole forming and concrete pouring pile forming process is adopted in uplift pile construction, before initial setting of pile body concrete, a hammer pipe is adopted to insert an unbonded steel strand and U-shaped pipe pressure-bearing component combined body into a specified elevation position in a concrete pile body, and finally the unbonded steel strand is tensioned and locked at the top of the pile, the interior of a foundation or the upper portion of the foundation through an anchor plate and an anchorage device. The post-insertion technology is adopted, the construction speed is high, the U-shaped pipe pressure-bearing component is easy and convenient to install, an anchor head and the anchorage device do not need to be installed at the lower end, the construction quality is good, and the pile body uplift bearing capacity is high. Compared with a common uplift pile, the problem of pile body cracks does not need to be considered, the using amount of main materials is small, and the manufacturing cost is low; and compared with an anti-floating anchor rod, the pile body is made of concrete, the quality is more reliable than that of cement paste or mortar adopted by the anti-floating anchor rod, and a main material protection layer is large in thickness, higher in bearing capacity and better in durability.

Description

technical field [0001] The application relates to a buoyancy-resistant and pull-resistant component of buildings, municipal engineering, underground engineering and high-rise structures in construction engineering, in particular to an unbonded steel strand U-shaped tube pressure-bearing type pull-out pile. Background technique [0002] In recent years, with the development of the national economy, urban construction is changing with each passing day, high-rise and super high-rise buildings are constantly emerging, and the foundation is buried deeper and deeper. At the same time, the pure basement part, podium or relatively independent underground The development and utilization of structures (such as sunken squares, underground garages, underground structures, etc.) are becoming more and more extensive. Because there is a large amount of groundwater in the gaps in the underground soil and the cracks in the rock mass, or the surface water in the construction process enters th...

AI Technical Summary

Problems solved by technology

[0005] This application provides a post-inserted unbonded steel strand U-tube pressure-bearing uplift pile and its construction method, which can overcome the technical problems of low bearing capacity and high reinforcement ratio of existing ordinary uplift piles, and can also overcome There are technical problems such as insufficient protective layer due to the small diameter of the cohesive anti-floating anchor rod, and the difficulty in guaranteeing the strength of the grouting body.

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