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Simple device for controlling distance between cross beams in pre-tensioning pre-stress construction and using method of simple device

A technology of prestressing and pretensioning, which is applied in the direction of manufacturing tools, ceramic molding machines, auxiliary molding equipment, etc., can solve the problems of uniform tensioning and inability to prestress tendons, and achieve uniform tensioning, avoid interference, and simple structure Effect

Pending Publication Date: 2022-05-06
中建七局交通建设有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the above-mentioned background technology, the present invention proposes a simple device for controlling the distance between pretensioned prestressed construction beams, which solves the problem that the prestressed tendons cannot be stretched evenly during pretensioned prestressed construction in the prior art

Method used

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  • Simple device for controlling distance between cross beams in pre-tensioning pre-stress construction and using method of simple device
  • Simple device for controlling distance between cross beams in pre-tensioning pre-stress construction and using method of simple device
  • Simple device for controlling distance between cross beams in pre-tensioning pre-stress construction and using method of simple device

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Experimental program
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Embodiment 5

[0039] Embodiment 5, a simple device for controlling the distance between pretensioned and prestressed construction beams. The difference between it and Embodiment 4 is that the fixed beam 2 is provided with a guide assembly 10 that cooperates with the traction rope 3, and the guide assembly 10 is arranged symmetrically. On the left and right sides of rangefinder ruler 9. The guide assembly 10 includes a guide wheel I10-1 and a guide wheel II10-2, the guide wheel I10-1 is arranged on one side of the pulley block II13, the guide wheel II10-2 is arranged on the side close to the distance measuring ruler 9, and the guide wheel I10- 1 and the guide wheel II 10-2 are connected with the fixed beam 2 through the connecting plate II 10-3. One end of the first fixed pulley 4-1 traction rope 3 that walks around the movable crossbeam 5 connects from the bottom after bypassing the guide wheel I 10-1, then bypasses the top of the guide wheel II 10-2, and finally connects with the distance ...

Embodiment 6

[0040] Embodiment 6 is a simple device for controlling the spacing of pretensioned prestressed construction beams. The difference between it and Embodiment 5 is that the lifting supports 8 are symmetrically arranged jacks, and the jacks are used to lift up the movable beams 5 . The connecting rib 6 includes a first connecting rib 6-1 and a second connecting rib 6-2, the first connecting rib 6-1 is arranged on the prefabricated beam 12, and the second connecting rib 6-2 is connected with the movable beam 5 through the connector II11 , and the connector II11 is arranged on the upper part of the movable beam 5, and the first connecting rib 6-1 is connected to the second connecting rib 6-2 through the connector I7. Connector Ⅰ7 and connector Ⅱ11 are finish-rolled rebar connectors or steel strand connectors. The first connecting bar 6-1 is a connecting bar 6 used repeatedly, and the second connecting bar 6-2 is a prestressed bar used when pouring concrete. The first connecting bar ...

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Abstract

The invention discloses a simple device for controlling the distance between cross beams in pre-tensioning method pre-stress construction, relates to the technical field of concrete manufacturing, and solves the problem that in the prior art, during pre-tensioning method pre-stress construction, pre-stress ribs cannot be tensioned uniformly. The device comprises at least one fixed cross beam, the lower portion of the fixed cross beam is connected with two symmetrically-arranged force bearing supports, the upper portion of the fixed cross beam is connected with a movable cross beam through a lifting supporting piece, symmetrically-arranged distance measuring mechanisms are connected between the fixed cross beam and the movable cross beam, and the movable cross beam is connected with a plurality of connecting ribs. And the connecting rib is connected with a connector. The prestressed tendon tensioning device is simple in structure, convenient to operate and capable of guaranteeing uniform tensioning of prestressed tendons during pre-tensioning method prestressed construction. The distance measuring mechanism is matched with the lifting piece to measure whether the movable cross beam is parallel or not during ascending. The pulley block I and the pulley block II are adopted to save the pulling force of the pulling rope and enable the moving distance of the pulling rope to be displayed on the ranging rod more obviously.

Description

technical field [0001] The invention relates to the technical field of concrete manufacture, in particular to a simple device and a use method for controlling the spacing of pretensioned prestressed construction beams. Background technique [0002] Prestressed concrete refers to a method of pre-stressing concrete members in the prefabrication process to improve the performance of members in order to improve the crack resistance of reinforced concrete members and avoid premature cracks in reinforced concrete members. The method of making steel bars that are stretched before the concrete is poured is called pretensioning. The pre-tensioning method is to stretch the prestressed tendons before pouring concrete, and temporarily anchor the stretched prestressed tendons on the pedestal or steel form, and then pour the concrete until the concrete curing reaches no less than 75% of the design strength value of the concrete. When the prestressed tendons are guaranteed to have suffici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/04B28B17/00
CPCB28B23/04B28B23/043B28B17/00
Inventor 马腾李峰王亚东曹传国张钊井维东景玉婷张永尹贺军袁金波李航
Owner 中建七局交通建设有限公司