Large diameter steel strand extrusion sleeve
A technology for extruding sleeves and steel strands, which is applied to structural elements, building components, buildings, etc., can solve the problems of large amount of extruded sleeves at fixed ends, large amount of anchors at tension ends, and complicated construction processes, and achieves guaranteed The effect of extrusion and construction quality, reduced construction cost, and simple construction operation
Inactive Publication Date: 2011-12-21
柳州市威尔姆预应力有限公司
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Problems solved by technology
The current anchoring method of these large-diameter steel strands is mainly to use clip anchors for anchoring. The construction process is relatively complicated and the construction cost is relatively high. According to the development of domestic prestressing technology, large-diameter steel strands will also be used in large-scale infrastructure construction. In engineering, not only the amount of anchors at the tension end is large, but also the amount of extrusion sleeves at the fixed end will increase.
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[0019] The present invention includes an extrusion sleeve 1 and an extrusion sheet 2 embedded in the inner hole of the extrusion sleeve. The extrusion sleeve 1 is a cylindrical hollow sleeve, and the extrusion sheet 2 is embedded in the sleeve; The pressing tablet 2 is cylindrical in wall thickness of 1-5mm, and has 1-6 grooves on each side of its axial two ends.
[0020] The inner diameter of one end of the extruding sheet 2 is threaded, and the outer wall of one end of the extruding sheet 2 is threaded, forming a structure with internal and external threads of the extruding sheet.
[0021] The grooves at both axial ends of the extrusion piece 2 are staggered at both ends.
[0022] The following is a specific example of using a special extrusion sleeve that can anchor a prestressed steel strand with a nominal diameter of φ22mm as a fixed end anchor in a prestressed anchor.
[0023] as attached figure 1 As shown, the extruded sleeve 1 has a length of 60-80 mm, and a taper ch...
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Abstract
A large-diameter steel strand extrusion sleeve is characterized in that it includes an extrusion sleeve and an extrusion sheet embedded in the inner hole of the extrusion sleeve. The extrusion sleeve is a cylindrical hollow sleeve, and the sleeve is embedded with Extruded sheet; said extruded sheet has a cylindrical wall thickness of 1-5mm, and 1-6 grooves are opened at both ends of the axial direction; Simple; because the extrusion piece is tightly embedded in the extrusion sleeve, it is not as easy to break as the extrusion spring, which ensures the anchoring length of the extrusion piece to the maximum extent and ensures the extrusion and construction quality; the extrusion sleeve anchor is used Compared with the construction of clip anchors, the equipment required for construction is simpler; compared with the construction of clip anchors, the use of extrusion sleeves can reduce construction costs.
Description
technical field [0001] The invention relates to a large-diameter steel strand extruding sleeve for a fixed-end anchor specially used for prestressed steel strands with a nominal diameter above φ15mm. Background technique [0002] Now the whole world is vigorously developing infrastructure, and our country is no exception. Prestressed steel strands are more and more commonly used in engineering. The diameters of steel strands currently used in China are generally φ12.7mm and φ15.2mm, and are generally used in houses and bridges. In the late 1990s, steel strands of φ17.8mm and φ21.6mm were developed abroad. my country's steel strand manufacturers have also developed these large-diameter steel strands in recent years. They are mainly used for bolt support in mine roadways, and are rarely used in bridge construction. The current anchoring method of these large-diameter steel strands is mainly to use clip anchors for anchoring. The construction process is relatively complicated ...
Claims
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Login to View More IPC IPC(8): E04C5/12E04C5/08E01D19/14E01D101/32
Inventor 尹海宜林居章钟华谭江涛黄志
Owner 柳州市威尔姆预应力有限公司