Preforming tool for tensioning opening in prestressed plate
By designing the reserved tools for the tensioning port in the prestressed plate, the construction joints and intermittent problems are solved, the construction progress is improved and the cost is reduced.
Patent Information
- Application Number
- CN202421696096.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the construction of post-tension method prestressed garages and factory structural panels, the existing technology requires the reservation of construction joints or post-pouring strips, resulting in construction breaks and affecting construction progress and costs.
Design a reserve tool for the tensioning port in the prestressed plate, including the chute box and the backsplash, which is fixed by hinge hinge and butterfly nuts, ensuring that the tool is installed before pouring the concrete and flipped and removed after solidification, avoiding reserved construction joints and intermittent breaks.
It achieves no need to reserve construction joints and intermittents, improves construction efficiency and reduces construction costs.
Smart Images
Figure CN223151669U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engineering construction, in particular to a tool for reserving a tensioning opening in a prestressed plate. Background Art
[0002] In the construction of structural slabs of post-tensioned garages and factory buildings, due to the large single-layer area, according to the design requirements of prestressed construction tensioning, the construction needs to be divided into multiple construction sections. When the tensioning end of the post-tensioned prestressing is inside the slab, a construction joint or post-cast strip needs to be reserved. If a construction joint is reserved, it is necessary to consider that the concrete strength must reach the design strength before prestressing can be carried out, which causes inevitable construction interruptions. Utility Model Content
[0003] The utility model aims to overcome the above problems existing in the prior art and provide a tool for reserving a tensioning opening in a prestressed plate.
[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:
[0005] A tool for reserving a tensioning opening in a prestressed plate comprises an inclined slot box with an open top and rear side, and an isosceles trapezoidal rear baffle, wherein the bottom of the rear baffle is hinged to the rear bottom of the inclined slot box by a hinge, and a wing plate perpendicular to the rear baffle and extending forward is welded to the left and right sides of the rear baffle respectively, and a hanging slot opening upward is provided on the top of the wing plate, and two studs are welded to the top of the rear side of the inclined slot box, and the studs are located in the hanging slots, and butterfly nuts are screwed on the studs, and the wing plate is clamped between the butterfly nuts and the side walls of the inclined slot box; a through hole for the steel strand to pass through is provided at the lower part of the rear baffle.
[0006] The inclined slot box includes a box bottom plate and two right-angled trapezoidal box side plates, the front of the box bottom plate is inclined toward the upper front side, the two box side plates are symmetrical on the left and right, the box bottom plate is welded between the two box side plates, and the studs are welded to the top of the rear side of the box side plates.
[0007] The box bottom plate is an isosceles trapezoid with a width gradually increasing from back to front, the width of the front of the chute box is greater than the width of the rear of the chute box, and the width of the top of the chute box is greater than the width of the bottom of the chute box.
[0008] Among them, two left and right parallel first reinforcing ribs are welded on the box bottom plate, and first U-shaped handles are welded at the front ends of the two first reinforcing ribs.
[0009] Among them, two left and right parallel second reinforcing ribs are welded to the front side of the rear baffle, and second U-shaped handles are welded to the top ends of the two first reinforcing ribs.
[0010] The beneficial effects of the utility model are as follows: the rear baffle and the chute box are hinged with hinges, and the rear baffle and the chute box are relatively fixed by means of screwed studs and butterfly nuts, the chute box and the rear baffle are installed at the prestressed anchor plate before pouring concrete, and after the concrete is poured and solidified, the butterfly nuts are loosened to loosen the wing plates, and the rear baffle is flipped into the chute box, so that the chute box and the rear baffle are conveniently taken out of the poured concrete; the prestressed plate internal tensioning opening reserved tool solves the problem that the construction joint position does not need to reserve a post-casting strip or a construction interval, thereby speeding up the construction progress and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0012] Figure 1 It is a structural schematic diagram of a tool for reserving a tensioning opening in a prestressed plate in the utility model;
[0013] Figure 2 It is a structural schematic diagram of the chute box in the utility model;
[0014] Figure 3 It is a structural schematic diagram of the rear baffle in the utility model;
[0015] Explanation of the numbers in the figure: inclined slot box 1, box bottom plate 11, box side plate 12, stud 13, butterfly nut 14, first reinforcing rib 15, first U-shaped handle 16, rear baffle 2, wing plate 21, hanging groove 211, through hole 22, second reinforcing rib 23, second U-shaped handle 24, hinge 3. DETAILED DESCRIPTION
[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0017] like Figures 1 to 3 As shown, a tool for reserving a tensioning opening in a prestressed plate comprises an inclined slot box 1 with an open top and rear side, and an isosceles trapezoidal rear baffle plate 2, wherein the bottom of the rear baffle plate 2 is hinged to the rear bottom of the inclined slot box 1 via a hinge 3.
[0018] A wing plate 21 perpendicular to the rear baffle 2 and extending forward is welded to the left and right sides of the rear baffle 2 respectively, and a hanging groove 211 opening upward is provided on the top of the wing plate 21. Two studs 13 are welded to the top of the rear side of the chute box 1, and the studs 13 are located in the hanging grooves 211. Butterfly nuts 14 are screwed on the studs 13, and the wing plate 21 is clamped between the butterfly nuts 14 and the side wall of the chute box 1.
[0019] The chute box 1 includes a box bottom plate 11 and two right trapezoidal box side plates 12. The front part of the box bottom plate 11 slopes upward to the front side. The two box side plates 12 are symmetric left and right. The box bottom plate 11 is welded between the two box side plates, and the stud 13 is welded to the top of the rear side of the box side plate.
[0020] The box bottom plate 11 is an isosceles trapezoid with a gradually increasing width from the rear to the front. The width of the front part of the chute box 1 is greater than the width of the rear part of the chute box, and the width of the top of the chute box 1 is greater than the width of the bottom of the chute box 1, so as to facilitate the demolding of the chute box.
[0021] Two first reinforcing ribs 15 parallel to each other left and right are welded on the box bottom plate 11, and the first reinforcing ribs 15 improve the strength of the box bottom plate; the front ends of the two first reinforcing ribs 15 are welded with a first U-shaped handle 16, and the first U-shaped handle 16 facilitates pulling the chute box 1 during demolding.
[0022] A through hole 22 for the steel strand to pass through is opened in the lower part of the rear baffle 2. Two second reinforcing ribs 23 parallel to each other left and right are welded on the front side of the rear baffle 2, and the second reinforcing ribs 23 improve the strength of the rear baffle; the top ends of the two first reinforcing ribs 23 are welded with a second U-shaped handle 24, and the second U-shaped handle 24 facilitates pulling the rear baffle 2 during demolding.
[0023] Specific construction process:
[0024] Adjust the relative position between the rear baffle and the chute box, tighten the wing nut to make the position between the rear baffle and the chute box relatively fixed, and apply the release agent on the outer sides of the rear baffle and the chute box;
[0025] Pass the post-tensioned steel strand through the hole on the rear baffle, bond the prestressed anchorage plate and the rear baffle with sponge tape, and finally fix the reserved tool at the inner tensioning port of the prestressed plate, the tensioning and anchoring end and the surrounding steel bars with iron wire;
[0026] After the concrete is poured and has finally set, loosen the wing nut, cut the iron wire, push the rear baffle into the chute box to separate the rear baffle from the prestressed anchorage plate and the concrete structure, and finally remove the embedded box from the plate through the first U-shaped handle on the chute box and the second U-shaped handle on the rear baffle.
[0027] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.
Claims
1. A tool for reserving internal tension openings in prestressed slabs, characterized in that: It includes an inclined chute box with an open top and rear side, and an isosceles trapezoidal rear baffle. The bottom of the rear baffle is hinged to the rear bottom of the inclined chute box through a hinge. A wing plate perpendicular to the rear baffle and extending forward is welded to each of the left and right sides of the rear baffle. An upward-opening hanging groove is formed at the top of the wing plate. Two studs are welded to the top of the rear side of the inclined chute box, and the studs are located in the hanging grooves. A wing nut is screwed onto the studs, and the wing plate is clamped between the wing nut and the side wall of the inclined chute box; a through hole for the steel strand to pass through is formed in the lower part of the rear baffle.
2. The prestressed slab internal tensioning port reserved tool according to claim 1, characterized in that: The inclined chute box includes a box bottom plate and two right trapezoidal box side plates. The front part of the box bottom plate slopes upward to the front side. The two box side plates are symmetric left and right. The box bottom plate is welded between the two box side plates, and the studs are welded to the top of the rear side of the box side plates.
3. The prestressed slab internal tensioning opening reserved tool according to claim 2, characterized in that: The box bottom plate is an isosceles trapezoid with a gradually increasing width from the rear to the front. The width of the front part of the inclined chute box is greater than the width of the rear part of the inclined chute box, and the width of the top of the inclined chute box is greater than the width of the bottom of the inclined chute box.
4. The prestressed slab internal tensioning opening reserved tool according to claim 2, characterized in that: Two left-and-right parallel first reinforcing ribs are welded to the box bottom plate, and a first U-shaped handle is welded to the front ends of the two first reinforcing ribs.
5. The prestressed slab internal tensioning port reserved tool according to claim 1, characterized in that: Two left-and-right parallel second reinforcing ribs are welded to the front side of the rear baffle, and a second U-shaped handle is welded to the top ends of the two first reinforcing ribs.