Large-span roof prestressed double-T plate and construction method thereof

Abstract

The large-span roof prestress double-T plate comprises a top plate and two rib plates, hidden boxes are embedded in the two flange parts, located outside the two rib plates, of the top plate, and one side face of each hidden box is flush with the side face of the corresponding flange part and is open; a spring is arranged in a cassette at the flange part of the right side of the top plate, the spring stretches out and draws back in the width direction of the top plate, a through hole is formed in the top of the cassette, the upper portion of the through hole is communicated with a vertical concealed pipe, the concealed pipe is also pre-buried in the top plate, a baffle is inserted in the concealed pipe, and the baffle abuts against the spring so that the spring can be in a compressed state. The upper end of the baffle extends to the position above the top of the concealed pipe, an inserting plate is further arranged in the portion, on the flange portion of the right side of the top plate, of the concealed box, and the inserting plate and the spring are separated by the baffle. The problems that in the prior art, formwork hanging construction is needed for filling the double-T-plate splicing seam, mortar caulking is adopted, and due to temperature changes, dry and solid mortar falls off from the splicing seam to hurt people or damage equipment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed double T-plates, and more specifically, to a large-span prestressed double T-plate for roofing and a construction method thereof. Background Art

[0002] Prestressed double T-plate is a prefabricated reinforced concrete load-bearing member combined with plate and beam, which is composed of a wide panel and two narrow and high ribs. Its panel is both a transverse load-bearing structure and a compression zone for the longitudinal load-bearing ribs. The cross section of the compression zone is large, the neutral axis is close to or enters the plate surface, and the tensile main steel bar has a large force arm. Therefore, the prestressed double T-plate has good structural mechanical properties, a clear force transmission level, and a simple geometric shape. It is a load-bearing member that can be made into a large span, a large coverage area, and is relatively economical. However, the prestressed double T-plate also has its disadvantages. The gap between the plates of the double T-plate is difficult to handle. The gap between the plates of the double T-plate is in an inverted V shape. The plate gap is generally handled by a hanging mold, which is cumbersome to construct. At the same time, due to the inconsistent temperature deformation of adjacent plates, it is easy to cause the mortar in the joint to break and break into small pieces to fall and injure people or damage equipment. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these purposes and other advantages according to the present invention, a large-span prestressed double T-plate for roof is provided, comprising: a top plate and two rib plates arranged on the lower plate surface of the top plate, two flanges of the top plate outside the two rib plates are pre-buried with dark boxes, the dark boxes are flat and long and arranged along the length direction of the top plate, and one side of the dark box is flush with the side of the flange and is open;

[0005] A spring is arranged in the dark box at the right flange of the top plate, and the spring is extended and retracted in the width direction of the top plate. A through hole is arranged on the top of the dark box, and a vertical dark tube is connected above the through hole. The dark tube is also pre-buried in the top plate, and the top of the dark tube is flush with the top surface of the top plate. A baffle is inserted in the dark tube, and the baffle presses the spring to compress the spring. The upper end of the baffle extends above the top of the dark tube. An insert plate is also arranged in the dark box at the right flange of the top plate, and the insert plate is in the shape of a long strip and its length matches the length of the dark box. The insert plate and the spring are separated by the baffle.

[0006] When the two large-span prestressed double T-plates for roofing are arranged side by side, the open surface of the dark box on the right side flange of the top plate of one large-span prestressed double T-plate for roofing faces the open surface of the dark box on the left side flange of the top plate of the other large-span prestressed double T-plate for roofing, and after the baffle in the dark box on the right side flange of the top plate of one large-span prestressed double T-plate for roofing is pulled out, the front end of the spring-driven plug plate is inserted into the dark box on the left side flange of the top plate of the other large-span prestressed double T-plate for roofing.

[0007] Preferably, a stop column is provided in the dark box on the left flange of the top plate, and a snap-in corresponding to the position of the stop column is provided at the front end of the plug plate, so that when the front end of the plug plate is inserted into the dark box on the left flange of the top plate of another large-span prestressed double T-plate for roofing, the stop column is stuck in the snap-in.

[0008] Preferably, a plurality of the springs are evenly spaced in the length direction of the dark box, the dark tube and the baffle corresponding to one spring are set as a group, and the dark tube and the baffle are also correspondingly provided in multiple groups.

[0009] Preferably, a plurality of the blocking posts are evenly spaced in the length direction of the dark box, and a plurality of bayonet holes are respectively arranged on the plug plate corresponding to the plurality of the blocking posts.

[0010] Preferably, a distance is left between the end of the dark box and the end of the top plate, and slide grooves are provided at both ends of the lower plate surface of the plug plate along the length direction of the plug plate, and a slide plate is slidably connected in the slide groove. The width of the slide plate is adapted to the joint seam produced by the side-by-side arrangement of two large-span prestressed double T-plates for the roof, and the slide plate can be flush with the end surface of the top plate after extending from the slide groove.

[0011] Preferably, a hoisting groove is provided on the top surface of the top plate, and a hoisting ring is pre-embedded in the hoisting groove.

[0012] The present invention also provides a construction method of the large-span roof prestressed double T-plate, comprising the following steps:

[0013] Step 1, hoisting the large-span prestressed double T-plate on the load-bearing beam, and aligning the large-span prestressed double T-plate on the load-bearing beam with the large-span prestressed double T-plate on the load-bearing beam, so that the open surface of the dark box on the left flange of the top plate of the large-span prestressed double T-plate on the load-bearing beam is aligned with the open surface of the dark box on the right flange of the top plate of the large-span prestressed double T-plate on the load-bearing beam;

[0014] Step 2: Pull out the baffle plate on the large-span prestressed double T-plate for roofing previously hoisted on the load-bearing beam from the concealed pipe, so that the front end of the spring-driven plug-in plate on the large-span prestressed double T-plate for roofing previously hoisted on the load-bearing beam is inserted into the concealed box on the left flange portion of the top plate of the large-span prestressed double T-plate for roofing;

[0015] Step three, pouring polyurethane foam on the plug plate to fill the joint between the large-span roof prestressed double T-board previously hoisted to the load-bearing beam and the large-span roof prestressed double T-board hoisting, so that the polyurethane foam is flush with the top surface of the large-span roof prestressed double T-board.

[0016] The present invention includes at least the following beneficial effects: by pre-embedding a dark box provided with components such as a spring, a baffle, and a plug plate on a large-span prestressed double T-plate for a roof, during the construction of the large-span prestressed double T-plate for a roof, it is only necessary to pull out the baffle plate to connect the plug plate between the joints of the two large-span prestressed double T-plates for a roof, thereby forming a support plate for carrying the caulking material, thereby avoiding the problem in the prior art that a hanging form is required for filling the joints of the double T-plates, and the construction process is cumbersome and inefficient. At the same time, due to the support of the plug plate, the problem in the prior art that mortar caulking is used, and the dry mortar falls from the joints due to temperature changes to injure people or damage equipment, can be avoided.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the large-span prestressed double T-plate for roofing in the width direction according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of adjacent two large span roof prestressed double T-plates constructed in step 1 in the construction method according to an embodiment of the present invention in the width direction;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the adjacent two-span roof prestressed double T-plates in the width direction constructed in step 2 of the construction method according to the embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the top view of the structure of the adjacent two-span roof prestressed double T-plates constructed in step 1 in the construction method according to the embodiment of the present invention in a horizontal plane;

[0022] Figure 5 It is a schematic diagram of the top view of the structure of the adjacent two large span roof prestressed double T-plates constructed in step 2 of the construction method described in the embodiment of the present invention in the horizontal plane. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0024] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 5 As shown, the present invention provides a large-span prestressed double T-plate for roof, comprising: a top plate 1 and two rib plates 2 arranged on the lower plate surface of the top plate 1, two flanges of the top plate 1 outside the two rib plates 2 are pre-buried with dark boxes 3, the dark boxes 3 are flat and long and are arranged along the length direction of the top plate 1, and one side of the dark box 3 is flush with the side of the flange and is open;

[0026] The dark box 3 is fixed on the steel mesh of the large-span prestressed double T-plate for roofing, and the steel mesh is placed in a mold for casting the large-span prestressed double T-plate for roofing, and then concrete is poured in the mold, and the dark box 3 can be embedded in the large-span prestressed double T-plate for roofing after the concrete solidifies. The open surface of the dark box 3 can be pre-blocked with a wooden board, and the wooden board can be removed after the concrete solidifies.

[0027] A spring 4 is arranged in the dark box 3 at the right flange of the top plate 1, and the spring 4 is extended and retracted along the width direction of the top plate 1. A through hole is arranged at the top of the dark box 3, and a vertical dark tube 5 is connected above the through hole. The dark tube 5 is also pre-buried in the top plate 1 and the top of the dark tube 5 is flush with the top surface of the top plate 1. A baffle 6 is inserted in the dark tube 5, and the baffle 6 presses the spring 4 to make the spring 4 in a compressed state. The upper end of the baffle 6 extends above the top of the dark tube 5. An insert plate 7 is also arranged in the dark box 3 at the right flange of the top plate 1. The insert plate 7 is in the shape of a long strip and its length matches the length of the dark box 3. The insert plate 7 and the spring 4 are separated by the baffle 6;

[0028] When the two large-span prestressed double T-plates for roofing are arranged side by side, the open surface of the dark box 3 on the right side flange of the top plate 1 of one large-span prestressed double T-plate for roofing is opposite to the open surface of the dark box 3 on the left side flange of the top plate 1 of the other large-span prestressed double T-plate for roofing, and after the baffle 6 in the dark box 3 on the right side flange of the top plate 1 of one large-span prestressed double T-plate for roofing is pulled out, the spring 4 drives the front end of the plug plate 7 to be inserted into the dark box 3 on the left side flange of the top plate 1 of the other large-span prestressed double T-plate for roofing.

[0029] The construction method of the large-span prestressed double T-plate for roofing described in the above embodiment comprises the following steps:

[0030] Step 1, hoisting the large-span prestressed double T-plate on the load-bearing beam, and aligning the large-span prestressed double T-plate on the load-bearing beam with the large-span prestressed double T-plate on the load-bearing beam, so that the open surface of the dark box 3 on the left flange of the top plate 1 of the large-span prestressed double T-plate hoisted is aligned with the open surface of the dark box 3 on the right flange of the top plate 1 of the large-span prestressed double T-plate on the load-bearing beam;

[0031] Step 2: Pull out the baffle plate 6 on the large-span prestressed double T-plate previously hoisted on the load-bearing beam from the concealed pipe 5, so that the front end of the spring 4 driving the plug plate 7 on the large-span prestressed double T-plate previously hoisted on the load-bearing beam is inserted into the concealed box 3 on the left flange of the top plate 1 of the large-span prestressed double T-plate;

[0032] Step three, pouring polyurethane foam on the plug plate 7 to fill the joint between the large-span roof prestressed double T-board previously hoisted to the load-bearing beam and the large-span roof prestressed double T-board hoisting, so that the polyurethane foam is flush with the top surface of the large-span roof prestressed double T-board.

[0033] In the above embodiment, by pre-embedding the dark box 3 with components such as the spring 4, the baffle 6, the plug plate 7, etc. on the large-span prestressed double T-plate for roof, when the large-span prestressed double T-plate for roof is constructed, it is only necessary to pull out the baffle 6 to connect the plug plate 7 between the joints of the two large-span prestressed double T-plates for roof, so as to form a support plate for carrying the caulking material, thereby avoiding the problem of the need for hanging formwork construction to fill the joints of the double T-plates in the prior art, and the cumbersome and inefficient construction process. At the same time, due to the support of the plug plate 7, the problem of using mortar to caulking in the prior art, and the problem of dry mortar falling from the joints due to temperature changes to injure people or damage equipment, can be avoided.

[0034] In another embodiment, a stop column 8 is provided in the dark box 3 on the left flange portion of the top plate 1, and a bayonet 9 corresponding to the position of the stop column 8 is provided at the front end of the plug plate 7, so that when the front end of the plug plate 7 is inserted into the dark box 3 on the left flange portion of the top plate 1 of another large-span prestressed double T-plate for roofing, the stop column 8 is stuck in the bayonet 9.

[0035] Here, the bayonet 9 can be formed by attaching an elastic rubber layer to the inner wall. The shape of the bayonet 9 can be as follows: Figure 4 As shown, the distance at the entrance is slightly smaller than the diameter of the blocking column 8. Of course, the elastic force of the spring 4 is sufficient to deform the rubber layer so that the blocking column 8 slides into the bayonet 9, and the inner arc of the bayonet 9 can be adapted to the outer wall of the blocking column 8. When the blocking column 8 is stuck in the bayonet 9, the plug plate 7 can establish a connection relationship with a certain connection strength with the blocking column 8, preventing the plug plate 7 from easily falling out of the dark box 3 on the left flange of the top plate 1 of the other large-span prestressed double T-plate for roofing.

[0036] In another embodiment, a plurality of the springs 4 are evenly spaced in the length direction of the dark box 3, and the concealed tube 5 and the baffle 6 corresponding to one spring 4 are set as a group, and the concealed tube 5 and the baffle 6 are also correspondingly provided in multiple groups.

[0037] Here, the multiple springs 4 can be of the same specification and have substantially the same elastic coefficient. The compression degree of the multiple springs 4 in the dark box 3 is substantially the same. When the baffle 6 is pulled out, the multiple springs 4 can press against the inner side of the plug plate 7 to maintain substantially the same thrust and moving speed, thereby preventing the plug plate 7 from being slightly tilted and stuck in the dark box 3 due to different thrusts. The use of multiple springs 4 can evenly push the plug plate 7 forward. At the same time, under the same compression degree, the multiple springs 4 generate a greater thrust than a single spring 4, and the push effect on the plug plate 7 is better.

[0038] In another embodiment, a plurality of the retaining columns 8 are evenly spaced in the length direction of the dark box 3, and a plurality of bayonet holes 9 are respectively provided on the plug plate 7 corresponding to the plurality of the retaining columns 8. This enables the plug plate 7 on one of the two adjacent large-span roof prestressed double T-boards to be connected to the plurality of retaining columns 8 on the other large-span roof prestressed double T-board, thereby enhancing the connection strength and reducing the risk of the plug plate 7 on the one large-span roof prestressed double T-board escaping from the dark box 3 on the other large-span roof prestressed double T-board.

[0039] In another embodiment, a distance is left between the end of the dark box 3 and the end of the top plate 1, and sliding grooves are provided at both ends of the lower plate surface of the plug plate 7 along the length direction of the plug plate 7, and a slide plate 10 is slidably connected in the slide groove. The width of the slide plate 10 is adapted to the joint seam produced by the side-by-side arrangement of the two large-span prestressed double T-plates of the roof, and the slide plate 10 can be flush with the end surface of the top plate 1 after extending from the slide groove.

[0040] In the above embodiment, since there is a distance between the end of the dark box 3 and the end of the top plate 1, the plug plate 7 cannot completely cover the joint seam between the adjacent two large span prestressed double T-plates. The slide plate 10 can just make up for this defect. When the front end of the plug plate 7 on the large span prestressed double T-plate hoisted on the load-bearing beam is inserted into the dark box 3 on the left flange of the top plate 1 of the large span prestressed double T-plate hoisted later, the slide plates 10 at both ends of the plug plate 7 can slide out from the slide groove, thereby filling the gap between the end of the plug plate 7 and the end of the top plate 1, providing a supporting basis for the caulking material.

[0041] In another embodiment, a hoisting groove is provided on the top surface of the top plate 1, and a lifting ring is pre-embedded in the hoisting groove, and the hoisting of the large-span prestressed double T-plate for roof can be facilitated by providing the lifting ring. Here, the hoisting groove can be arranged above the rib plate 2, and the lifting ring can be fixed on the steel mesh of the large-span prestressed double T-plate for roof. After the large-span prestressed double T-plate for roof is hoisted onto the load-bearing beam, the hoisting groove can be filled with mortar to make the top surface of the large-span prestressed double T-plate for roof flat.

[0042] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A large-span prestressed double T-plate for roofing, comprising: A top plate and two ribs arranged on the lower surface of the top plate, characterized in that two flanges of the top plate outside the two ribs are pre-buried with dark boxes, the dark boxes are flat and long and arranged along the length direction of the top plate, and one side of the dark box is flush with the side of the flange and is open; A spring is arranged in the dark box at the right flange of the top plate, and the spring is extended and retracted in the width direction of the top plate. A through hole is arranged on the top of the dark box, and a vertical dark tube is connected above the through hole. The dark tube is also pre-buried in the top plate, and the top of the dark tube is flush with the top surface of the top plate. A baffle is inserted in the dark tube, and the baffle presses the spring to compress the spring. The upper end of the baffle extends above the top of the dark tube. An insert plate is also arranged in the dark box at the right flange of the top plate, and the insert plate is in the shape of a long strip and its length matches the length of the dark box. The insert plate and the spring are separated by the baffle. When the two large-span prestressed double T-plates for roofing are arranged side by side, the open surface of the dark box on the right side flange of the top plate of one large-span prestressed double T-plate for roofing faces the open surface of the dark box on the left side flange of the top plate of the other large-span prestressed double T-plate for roofing, and after the baffle in the dark box on the right side flange of the top plate of one large-span prestressed double T-plate for roofing is pulled out, the front end of the spring-driven plug plate is inserted into the dark box on the left side flange of the top plate of the other large-span prestressed double T-plate for roofing.

2. The large-span prestressed double T-plate for roofing according to claim 1, characterized in that: A stop column is arranged in the dark box on the left flange of the top plate, and a bayonet corresponding to the position of the stop column is arranged at the front end of the plug plate, so that when the front end of the plug plate is inserted into the dark box on the left flange of the top plate of another large-span prestressed double T-plate for roofing, the stop column is stuck in the bayonet.

3. The large-span prestressed double T-plate for roofing according to claim 1, characterized in that: A plurality of springs are evenly spaced in the length direction of the dark box, and the dark tube and the baffle corresponding to one spring are set as a group, and the dark tube and the baffle are also correspondingly provided in a plurality of groups.

4. The large-span prestressed double T-plate for roofing according to claim 1, characterized in that: A plurality of blocking posts are evenly spaced in the length direction of the dark box, and a plurality of bayonet holes are respectively arranged on the plug plate corresponding to the plurality of blocking posts.

5. The large-span prestressed double T-plate for roofing according to claim 1, characterized in that: A distance is left between the end of the dark box and the end of the top plate, and slide grooves are provided at both ends of the lower plate surface of the plug plate along the length direction of the plug plate. A slide plate is slidably connected in the slide groove, and the width of the slide plate is adapted to the joint seam produced by the side-by-side arrangement of two large-span prestressed double T-plates for the roof, and the slide plate can be flush with the end surface of the top plate after extending from the slide groove.

6. The large-span prestressed double T-plate for roofing according to claim 1, characterized in that: The top surface of the top plate is provided with a hoisting groove, and a hoisting ring is pre-buried in the hoisting groove.

7. The construction method of the large-span prestressed double T-plate for roofing according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, hoisting the large-span prestressed double T-plate on the load-bearing beam, and aligning the large-span prestressed double T-plate on the load-bearing beam with the large-span prestressed double T-plate on the load-bearing beam, so that the open surface of the dark box on the left flange of the top plate of the large-span prestressed double T-plate on the load-bearing beam is aligned with the open surface of the dark box on the right flange of the top plate of the large-span prestressed double T-plate on the load-bearing beam; Step 2: Pull out the baffle plate on the large-span prestressed double T-plate for roofing previously hoisted on the load-bearing beam from the concealed pipe, so that the front end of the spring-driven plug-in plate on the large-span prestressed double T-plate for roofing previously hoisted on the load-bearing beam is inserted into the concealed box on the left flange portion of the top plate of the large-span prestressed double T-plate for roofing; Step three, pouring polyurethane foam on the plug plate to fill the joint between the large-span roof prestressed double T-board previously hoisted to the load-bearing beam and the large-span roof prestressed double T-board hoisting, so that the polyurethane foam is flush with the top surface of the large-span roof prestressed double T-board.

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