Device and method for transversely tensioning prestress of trapezoid sleeper

A transverse tensioning and prestressing technology, applied in ceramic molding machines, manufacturing tools, etc., can solve the problems of no sleeper applying such transverse prestressing, no tooling equipment, etc., and achieve convenient and fast transverse tensioning construction, low cost, Easy-to-use effects

Inactive Publication Date: 2011-06-15
中铁十四局集团房桥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the design and construction technology of trapezoidal sleepers were imported from Japan, there is currently no experience in applying this kind of transverse prestress in sleepers, and there is no corresponding tooling equipment in the domestic market
And the PC steel rods are anchored with M11 nuts, which are non-Chinese standard connecting threads. At present, the tie-rod jacks purchased in the domestic market do not have matching connectors.

Method used

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  • Device and method for transversely tensioning prestress of trapezoid sleeper
  • Device and method for transversely tensioning prestress of trapezoid sleeper
  • Device and method for transversely tensioning prestress of trapezoid sleeper

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Embodiment Construction

[0023] The following combination figure 1 To describe a specific use occasion of an embodiment of the prestressed transverse tensioning device according to the present invention, in figure 1 shows the structure of the tensioned anchor hole of the trapezoidal sleeper 2, the major diameter of the anchor hole is 80mm, the minor diameter is 60mm, and the depth is 65mm, and the anchor nut 2d is installed in the anchor hole protruding from the PC steel On the rod 2a, the PC steel rod protrudes about 30mm, and is 35mm away from the concrete outer side of the trapezoidal sleeper. Each trapezoidal sleeper has 4 PC steel rods 2a. The PC steel rods 2a are high-strength round steel with a diameter of 10mm and a tensile strength of 124KN. 65 threads, wherein the steel rod 2a is covered with a plastic sleeve 2c with an inner diameter of 11mm, so as to be isolated from the concrete. In addition, a support plate 2b is provided at the bottom of the anchor hole to prevent local stress concent...

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Abstract

The invention provides a device for transversely tensioning the prestress of a trapezoid sleeper, which comprises a centre hole jack (1), a supporting member (3), a pull rod (4), a connecting piece (5) and a clamping piece anchoring device (6), wherein the supporting member (3) is arranged between the jack (1) and the trapezoid sleeper (2), the pull rod (4) extends to penetrate through the jack (1) and the supporting member (3), a threaded end (4a) of the pull rod (4) is connected with a PC steel bar of the trapezoid sleeper (2) through the connecting piece (5), and the other end (4b) of the pull rod (4) is locked by the clamping piece anchoring device (6). The invention also provides a method for transversely tensioning the prestress of a trapezoid sleeper.

Description

technical field [0001] The invention relates to the field of concrete sleeper production, in particular to a prestressed stretching device and method for trapezoidal sleepers. Background technique [0002] The currently produced subway trapezoidal sleepers and ballasted bed trapezoidal sleepers are designed with transverse prestressing, and PC steel rods are used as prestressing tendons for such sleepers. Since the design and construction technology of trapezoidal sleepers are imported from Japan, there is currently no experience in applying this kind of transverse prestress to sleepers, and there is no corresponding tooling equipment in the domestic market. Moreover, the PC steel rods are anchored with M11 nuts, which are non-Chinese standard connecting threads. At present, the tie rod jacks purchased in the domestic market do not have matching connectors. In order to save costs, the inventor uses the existing through-hole jack to design a tensioning device for transverse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/04
Inventor 鄂宝生姜忠仁曹凤洁苏华锋魏云翔赵艳玲
Owner 中铁十四局集团房桥有限公司
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