Prestressed anti-corrosion anti-floating anchor rod and construction method

Abstract

The invention discloses a prestressed anti-corrosion anti-floating anchor rod and a construction method. The construction method comprises the steps that a plurality of retard-bonded prestressed steelstrands, the lower ends of the retard-bonded prestressed steel strands, a first water stop plate and a lower bearing plate are integrally formed through pre-grouting pouring to form a first column body, a part of the first water stop plate is exposed out of the first column body, the outer side of the exposed part of the first water stop plate is continuously poured to form a second column body to form a prefabricated anchor rod, the second column body warps the exposed part of the first water stop plate, the upper part of the retard-bonded prestressed steel strand is sleeved with a second water stop plate, a post-pouring column body is formed between the interior of the second water stop plate and the retard-bonded prestressed steel strands through supplementary pouring, and the post-cast column body is connected with the second column body. In this way, according to the prestressed anti-corrosion anti-floating anchor rod and the construction method thereof, the retard-bonded prestressed steel strands are adopted, the whole anchor rod is prevented from being corroded by water through the novel waterproof structure and the construction method, and the problem that the anti-floating anchor rod loses efficacy is avoided.

Description

technical field [0001] The invention relates to the field of prestressed anti-floating anchor rods, in particular to a prestressed anti-corrosion anti-floating anchor rod and a construction method. Background technique [0002] Anti-floating anchor is an anti-floating technology used by underground structures to resist water buoyancy. It is widely used at home and abroad, especially in China in recent years. The buried depth of hydraulic construction and other underground projects is getting deeper and deeper, and anti-floating anchors are increasingly playing an irreplaceable important role. [0003] Anti-floating anchors are generally permanent structures, which are divided into two categories: prestressed anchors and fully bonded anchors (non-prestressed anchors). The construction process of using prestressed anchor rods is relatively complicated, the construction management is inconvenient, and the casing needs to be installed when the anchor head passes through the und...

AI Technical Summary

Problems solved by technology

The construction technology of prestressed anchor rods is relatively complicated, the construction management is inconvenient, and the casing needs to be installed when the anchor head passes through the underground structure. Waterproof measures must be taken inside and outside the casing, and it is difficult to waterproof

Therefore, the steel strands in the anti-floating anchor will be eroded by groundwater, gradually corroded, and the tensile bearing capacity will be reduced. In severe cases, the stressed steel bars may be broken and the anti-floating components will fail.

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