Prestressed anchorage device used based on recyclable anchor cable

Abstract

The invention discloses a prestressed anchorage device used based on a recyclable anchor cable. The prestressed anchorage device comprises an anchor pad cylinder, a rotatable guide plate is arranged at the top end of the anchor pad cylinder, the bottom of the anchor pad cylinder is provided with straight holes allowing steel strands to penetrate into, anchor rings are fixedly connected into the anchor pad cylinder, anchor blocks and steel blocks which are detachably connected are arranged in the anchor rings, the anchor rings and the anchor blocks are spliced in an arc mode to form conical holes allowing the lower end parts of anchorage device clamp pieces to penetrate into and wrapping the anchorage device clamp pieces, and the conical holes correspond to the straight holes in a one-to-one mode; the conical gradient of each conical hole is matched with the gradient of tapers formed by splicing the anchorage device clamp pieces, split joints formed by the anchorage device clamp piecescommunicate with joints of the anchor rings and the anchor blocks to form through joints, and the steel blocks are fixed at the centers of the anchor rings through clamping grooves in the anchor rings. The steel strands are locked and fixed by the anchorage device clamp pieces through the conical holes, and after use, the steel blocks can be separated so that the anchor blocks and the anchorage device clamp pieces can be loosened or fall off, and the steel strands can be recycled conveniently; the structure is simple, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of anchors, in particular to a prestressed anchor based on a recoverable anchor cable. Background technique [0002] The construction of many high-rise buildings and underground projects requires the excavation of deep foundation pits. Due to the restriction of the "red line" of the construction site, most of the foundation pits cannot be excavated by sloping. Deep foundation pit support is often used to ensure that the soil wall is vertical At present, most temporary engineering supports usually use recyclable anchor cables to save construction costs and reduce the pollution of underground space. Therefore, the design and improvement of recyclable anchor cables have gradually become the focus and research of scholars in this field. The hot spot, prestressed anchor is the most critical core component in the retrievable cable anchorage system, and its mechanical properties are related to the safety, reliabili...

AI Technical Summary

Problems solved by technology

Existing recyclable anchor cables usually only apply prestress to single or double steel strands in engineering practice, and clamp, fix, and wedge the rigid strands on the anchor plate. , chemical formula and other methods to realize the recovery of steel strands, due to the limited number of working steel strands or tension errors, it is impossible to ensure sufficient anchoring force, resulting in failure of anchor cable support

After the support is completed, there is a problem that the steel strands cannot be effectively recycled, resulting in a great waste of steel strand resources, and also brings safety hazards to the construction of adjacent buildings (structures) in the later stage. In view of this, for prestressed There is no more effective solution for the design of the anchor. It is particularly important to design and manufacture a prestressed anchor to ensure that the anchor can firmly hold the anchor cable and can reliably recover the steel strand in the later stage.

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