Device and method for positioning casing pipe

A casing and positioning technology, which is applied to ceramic molding machines, manufacturing tools, molds, etc., can solve problems such as difficulty in changing casings, limitation of the scope of application of molded concrete components, and damage to the bottom mold of concrete components, and achieve minimal damage. , Eliminate repetition and difficulty, and improve the effect of production efficiency

Inactive Publication Date: 2011-06-22
中铁十四局集团房桥有限公司
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  • Abstract
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Problems solved by technology

Displacement of the casing due to shifting of the concrete element after tensioning, while the patented locating device is still fixed to the bottom form and retained in the casing at this time, which will cause damage to the concrete element, casing and / or bottom form severe injury
As a result, such positioning devices are very limited in their range of applicability for molded concrete elements
In addition, the positioning device is fixed in place in a fixed position of the bottom form and cannot be moved, so it is difficult to change the position of the casing embedded in the concrete member

Method used

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  • Device and method for positioning casing pipe
  • Device and method for positioning casing pipe

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Embodiment Construction

[0016] The term "pretensioning process" as used herein is a method of molding prestressed concrete elements, referring to a construction method in which steel is tensioned on a pedestal and then concrete is poured to form a prestressed concrete element. The process includes stretching the steel bar with a predetermined tension and fixing the two ends of the steel bar on the pedestal or steel mold with clamps; supporting the mold and pouring concrete; after the concrete member reaches the predetermined strength, releasing the prestressed steel bar. The reinforcement and thus the reinforcement shrinks (ie is called tension) so as to create a pre-stress in the concrete member. In particular, the long-line pedestal method (also known as the long-line method) can be used for concrete members produced by the pre-tensioning process, and the length of the long-line pedestal is usually 50-150m. In the pre-tensioning process of the long-line pedestal, steel bars are stretched along the ...

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Abstract

The invention provides a method for positioning a casing pipe in a concrete member, comprising the following steps: selecting a proper rivet; connecting the rivet with a positioning piece, and extending the rivet out of a hole in a bottom die; fastening the rivet so as to fix the positioning piece to the proper position on the bottom die; installing the casing pipe on the positioning piece; stretching at least one reinforcing steel bar with preset stretching force, and fixing the reinforcing steel bar; pouring the concrete member in the bottom die, wherein at least one stretched reinforcing steel bar passes through the concrete member; and when the concrete member reaches the preset strength, releasing at least one stretched and fixed reinforcing steel bar to contract the reinforcing steel bar, wherein the contraction force of at least one reinforcing steel bar is acted on the rivet so as to cut off the rivet. The invention also provides a positioning mechanism for positioning the casing pipe in the concrete member. The invention provides a device for moulding the concrete member embedded with the casing pipe.

Description

technical field [0001] The present invention generally relates to the manufacture of concrete components, in particular to a method and a positioning mechanism for positioning embedded parts, especially sleeves, in prestressed concrete. The invention also relates to a device for the manufacture of casing-embedded concrete elements. Background technique [0002] Many concrete components need to be embedded with embedded parts. Typically, pre-embedded casings are required in concrete sleepers, track slabs and frame slabs used in railway and subway traffic. [0003] Typical casing positioning usually uses casing positioning bolts to pass through the bottom form below the bottom form of the track slab, and then screwed with the embedded casing above the bottom form. In the process of positioning the casing, it is necessary to tighten the casing positioning bolts. Simultaneously, before the demoulding of the concrete member, the casing anchor bolt must be unscrewed from the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/00B28B7/22
Inventor 姜忠仁魏云翔赵艳玲李强李广坤
Owner 中铁十四局集团房桥有限公司
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