Prestressed anchoring system by high tensile steel wire pretension and construction method thereof

Abstract

The invention discloses a kind of pre-tensioned pre-stressing force system for anchoring the high-tensile steel wire and its method for construction. The anchoring system includes n anchoring elements; each anchoring element comprises fixed anchoring plates, tension-anchoring plates; upsetting screw nuts and bundles of steel wire with pre-stressing in toroid form. The bundles of steel wire with pre-stressing force, are constructed with the various steel wire of the fix-length high-tensile steel wire bundles, which are closely fastened by the toroid devices; the ends of these steel wire are anchored to the fixed anchor plate through upsetting method, the other ends are anchored to the screw bolts. Through the upsetting screw bolts and the tension end-anchored plates adjacent to the casing pipes placed in the toroid high-tensile steel wire bundles, m strengthened toroid put in the toroid shape steel wire bundles and the casing pipes; grout mortar in the casing pipes; the said construction method includes manufacture, placement of components of single high-tensile steel wire pre-tensioned pre-stressing anchoring system, grout cement, mobile vaulting pole, the sealing-off processes, etc. The loss of pre-tension force of the anchoring system is less, the deviation of uncertainty is small; the cohesion with the cement mortar is good; the structural components are safe; its construction method is compact, convenient and it improves the property of the construction of structural components.

Description

technical field [0001] The invention relates to a prestressed anchorage system, in particular to a vertical prestressed anchorage system and a construction method thereof. Background technique [0002] In prestressed concrete bridges, due to the need for shear resistance, the vertical prestressing system is usually installed in the bridge web. The existing vertical prestressed anchorage system is generally a post-tensioning prestressed system composed of a finish-rolled threaded steel bar 16, a nut 14 screwed on the finished-rolled threaded steel bar, and an anchor backing plate 15. The steel bar is stretched, and then the nut 14 is tightened, and the retraction of the finished threaded steel bar is prevented through the anchor plate and the concrete foundation, thereby introducing prestress. For the basic structure, see Figure 5 As shown, the technical structure is simple and easy to operate, but it also has the following disadvantages: [0003] 1. The thread of the finis...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in the existing rigid vertical prestressed anchorage system composed of finish-rolled threaded steel bars, nuts screwed on the finished-rolled threaded steel bars, and anchor pads, the retraction of the above-mentioned steel bars is not constant. When the elongation is small, the retraction loss of the anchorage is relatively large, the vertical prestressing effect is poor, the bond with the concrete, the gripping effect is not very good, and the construction management is inconvenient. Provide a low bending stiffness, soft A flexible vertical prestressed anchorage system composed of high-strength steel wires as prestressed tendons—high-strength steel wire pretensioned prestressed anchorage system and its construction method. It has the advantages of good adhesion and grip, good safety performance of components, and its construction method is compact and convenient, and at the same time improves the construction performance of components

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