Anti-crack precast concrete plate structure

Abstract

The utility model relates to an anti-crack type precast concrete plate structure which comprises a rectangular plate body, the rectangular plate body comprises a concrete base layer, a steel reinforcement framework, a heat preservation layer, a lightweight concrete layer and a mortar anti-crack layer, and the steel reinforcement framework is formed by welding and fixing cross beams and vertical ribs. A plurality of longitudinal connecting ribs are welded to the cross beams of the steel reinforcement framework at intervals, the upper ends of the longitudinal connecting ribs penetrate through the heat preservation layer and are inserted into the lightweight concrete layer to be welded to the steel wire mesh layer, and wavy concave-convex structures are arranged on the left end face and the right end face of the rectangular plate body correspondingly; the rectangular plate body is matched with the adjacent rectangular plate body in an inserted mode through the wave-shaped concave-convex structures, and colloid wrapping bodies are arranged in wave troughs of the wave-shaped concave-convex structures. The structure ensures that splicing construction is convenient and fast, the operation efficiency is remarkably improved, the lightweight design requirement and the use strength requirement are met at the same time, use is flexible, and the anti-cracking effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of building plates, in particular to a crack-resistant prefabricated concrete plate structure. Background Art

[0002] Precast concrete panels are cast elsewhere rather than at the final construction site. Precast concrete panels of different sizes and shapes can use fibers to enhance their reliability and toughness after cracking. In recent years, precast concrete panels have become the new favorite of the construction industry with their low cost and excellent performance. It can be said that precast concrete panels have accelerated the speed of residential industrialization in my country, so their structural performance has also received more and more attention.

[0003] Existing precast concrete panels generally include a concrete base, a steel bar skeleton arranged in the concrete base, a mortar anti-cracking layer arranged on the surface of the concrete base, and a mesh cloth arranged in the mortar anti-cracking layer. In order to achieve thermal insulation and sound insulation functions, a thermal insulation layer and a sound insulation layer are generally arranged between the concrete base and the mortar anti-cracking layer. By setting the mortar anti-cracking layer and the mesh cloth, cracks on the surface of the panel can be avoided. However, this structural form still has the following problems: 1. When two adjacent precast concrete panels are spliced ​​and used, the joint is a weak point and also a location where cracks are prone to occur. Therefore, during construction, anti-cracking glue is usually injected at the edge of the joint to enhance the connection strength, but it also causes construction troubles and low operating efficiency; 2. Due to the requirements of lightweight design, precast concrete panels should also reflect the characteristics of lightweight structures, such as hollow structures, but for some building locations with large bearing pressure, this structural form does not meet the requirements of use strength. Utility Model Content

[0004] The purpose of the utility model is to provide a crack-resistant precast concrete plate structure that solves the above-mentioned problems. The structure is reasonable and reliable to use, which ensures that the splicing construction is convenient and quick, significantly improves the working efficiency, and at the same time meets the lightweight design requirements and the use strength requirements. It is flexible to use and has a good anti-cracking effect.

[0005] The technical solution of the utility model is:

[0006] A crack-resistant precast concrete plate structure comprises a rectangular plate body, the rectangular plate body comprises a concrete base, a steel bar skeleton arranged in the concrete base, an insulation layer arranged on the upper surface of the concrete base, a lightweight concrete layer arranged on the upper surface of the insulation layer, and a mortar crack-resistant layer arranged on the upper surface of the lightweight concrete layer, the steel bar skeleton is formed by welding and fixing a crossbeam and a vertical bar, and its technical key points are: a steel mesh layer is arranged in the lightweight concrete layer, a plurality of longitudinal connecting bars are welded on the crossbeam of the steel bar skeleton at intervals, the upper end of each longitudinal connecting bar passes through the insulation layer and is inserted into the lightweight concrete layer and welded to the steel mesh layer, the left and right end faces of the rectangular plate body are respectively provided with a wavy concave-convex structure, the rectangular plate body is plugged and matched with an adjacent rectangular plate body by utilizing the wavy concave-convex structure, and a colloidal inclusion is arranged in the trough of the wavy concave-convex structure.

[0007] In the above-mentioned crack-resistant prefabricated concrete plate structure, an anti-cracking mesh cloth is provided in the mortar anti-cracking layer to enhance the anti-cracking function.

[0008] In the above-mentioned crack-resistant prefabricated concrete plate structure, a plurality of mutually parallel through holes are arranged in the concrete base layer, and the through holes extend from the front end surface of the concrete base layer to the rear end surface of the concrete base layer.

[0009] In the above-mentioned crack-resistant prefabricated concrete plate structure, compressive steel bars are inserted into the through holes of the concrete base.

[0010] In the above-mentioned crack-resistant prefabricated concrete plate structure, the end of the through hole of the concrete base layer is plugged with a connecting rod for hoisting.

[0011] The above-mentioned crack-resistant precast concrete plate structure has a notch at one end of the mortar anti-cracking layer of the rectangular plate body and a boss matching the notch size at the other end, and the boss of the mortar anti-cracking layer of the rectangular plate body overlaps the notch of the mortar anti-cracking layer of the adjacent rectangular plate body.

[0012] In the above-mentioned crack-resistant prefabricated concrete plate structure, a glass magnesium bottom plate is bonded to the lower surface of the concrete base.

[0013] The beneficial effects of the utility model are:

[0014] 1. The left and right end faces of the rectangular plate body are respectively provided with a wave-shaped concave-convex structure, and a colloidal inclusion is provided in the trough of the wave-shaped concave-convex structure. When the rectangular plate body is plugged and matched with the adjacent rectangular plate body by using the wave-shaped concave-convex structure, the wave crest of the wave-shaped concave-convex structure squeezes the colloidal inclusion in the corresponding trough, and the outer film of the colloidal inclusion is damaged to cause the colloidal to overflow, so that the two adjacent rectangular plate bodies are bonded together, which is simple to operate, convenient and fast during splicing construction, and significantly improves the work efficiency. At the same time, the colloidal bonding surface at the joint of the two adjacent rectangular plate bodies is larger, the connection is more firm, and the crack resistance is better.

[0015] 2. A wire mesh layer is provided in the lightweight concrete layer, and the wire mesh layer is connected and fixed to the crossbeam of the steel skeleton by a number of longitudinal connecting ribs, thereby enhancing the service strength of the lightweight concrete layer and further avoiding the crack resistance of the plate surface.

[0016] 3. Multiple parallel through holes are arranged in the concrete base to meet the requirements of lightweight design. When used in construction locations with large bearing pressure, compressive steel bars can be inserted into the through holes. This meets the requirements of use strength, is flexible to use, and has good anti-cracking effect.

[0017] 4. During hoisting, connecting rods can be inserted at both ends of some through holes to connect with the hoisting tools, which is beneficial to hoisting and convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the butt joint of two rectangular plate bodies;

[0020] Figure 3 It is a schematic diagram of two rectangular plate bodies butted together into one;

[0021] Figure 4 It is a schematic diagram of the assembly of the rectangular plate body and the compressive reinforcement.

[0022] In the figure: 1. mortar anti-cracking layer, 2. anti-cracking mesh cloth, 3. lightweight concrete layer, 4. wire mesh layer, 5. longitudinal connecting ribs, 6. thermal insulation layer, 7. concrete base, 8. steel skeleton, 801. beam, 802. vertical ribs, 9. through holes, 10. glass magnesium bottom plate, 11. wavy concave-convex structure, 12. colloidal inclusions, 13. bosses, 14. notches, 15. compressive steel bars. DETAILED DESCRIPTION

[0023] The utility model is described in detail according to the accompanying drawings of the specification.

[0024] like Figure 1 to Figure 4As shown, the anti-cracking prefabricated concrete plate structure includes a rectangular plate body, the rectangular plate body includes a concrete base 7, a steel skeleton 8 arranged in the concrete base 7, an insulation layer 6 arranged on the upper surface of the concrete base 7, a lightweight concrete layer 3 arranged on the upper surface of the insulation layer 6, and a mortar anti-cracking layer 1 arranged on the upper surface of the lightweight concrete layer 3. The steel skeleton 8 is welded and fixed by a cross beam 801 and a vertical rib 802. An anti-cracking mesh cloth 2 is arranged in the mortar anti-cracking layer 1 to enhance the anti-cracking function. The mortar anti-cracking layer 1 is formed by mechanically mixing cement, quartz sand, polymer binder and additives. A glass magnesium base plate 10 is bonded to the lower surface of the concrete base 7.

[0025] Among them, a wire mesh layer 4 is provided in the lightweight concrete layer 3, and a plurality of longitudinal connecting ribs 5 are welded at intervals on the crossbeam 801 of the steel skeleton 8. The upper end of each longitudinal connecting rib 5 passes through the insulation layer 6 and is inserted into the lightweight concrete layer 3 and welded to the wire mesh layer 4.

[0026] The left and right end faces of the rectangular plate body are respectively provided with a wavy concave-convex structure 11, and the rectangular plate body is plugged and matched with the adjacent rectangular plate body by using the wavy concave-convex structure 11, and a colloidal inclusion 12 is provided in the trough of the wavy concave-convex structure 11. The mortar anti-cracking layer 1 of the rectangular plate body is provided with a notch 14 at one end, and a boss 13 matching the size of the notch 14 at the other end, and the boss 13 of the mortar anti-cracking layer 1 of the rectangular plate body is overlapped at the notch 14 of the mortar anti-cracking layer 1 of the adjacent rectangular plate body.

[0027] The concrete base layer 7 is provided with a plurality of mutually parallel through holes 9 at intervals, and the through holes 9 extend from the front end surface of the concrete base layer 7 to the rear end surface of the concrete base layer 7. Compression steel bars 15 are inserted into the through holes 9 of the concrete base layer 7. During hoisting, a connecting rod (omitted in the figure) for hoisting is inserted into the end of one or more through holes 9 of the concrete base layer 7.

[0028] Working principle:

[0029] During construction, the left and right end faces of the rectangular plate body are plugged and bonded with the adjacent rectangular plate body by using the wave-shaped concave-convex structure 11 and the colloid inclusion 12. According to the strength requirements of on-site use, compressive steel bars 15 are inserted into the multiple through holes 9 of the rectangular plate body.

[0030] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A crack-resistant prefabricated concrete plate structure, comprising a rectangular plate body, the rectangular plate body comprising a concrete base, a steel skeleton arranged in the concrete base, an insulation layer arranged on the upper surface of the concrete base, a lightweight concrete layer arranged on the upper surface of the insulation layer, and a mortar crack-resistant layer arranged on the upper surface of the lightweight concrete layer, the steel skeleton being welded and fixed by a crossbeam and a vertical rib, characterized in that: A wire mesh layer is provided in the lightweight concrete layer, and a plurality of longitudinal connecting ribs are welded at intervals on the crossbeam of the steel skeleton. The upper end of each longitudinal connecting rib passes through the insulation layer and is inserted into the lightweight concrete layer and welded to the wire mesh layer. The left and right end faces of the rectangular plate body are respectively provided with a wavy concave-convex structure. The rectangular plate body is plugged and matched with an adjacent rectangular plate body by utilizing the wavy concave-convex structure, and a colloidal inclusion is provided in the trough of the wavy concave-convex structure.

2. The anti-cracking precast concrete plate structure according to claim 1 is characterized in that: An anti-cracking mesh cloth is arranged in the mortar anti-cracking layer.

3. The anti-cracking precast concrete plate structure according to claim 1, characterized in that: A plurality of mutually parallel through holes are arranged in the concrete base layer, and the through holes extend from the front end surface of the concrete base layer to the rear end surface of the concrete base layer.

4. The anti-cracking precast concrete plate structure according to claim 1, characterized in that: Compression steel bars are inserted into the through holes of the concrete base.

5. The anti-cracking precast concrete plate structure according to claim 1, characterized in that: A connecting rod for hoisting is inserted into the end of the through hole of the concrete base.

6. The anti-cracking precast concrete plate structure according to claim 1, characterized in that: The mortar anti-cracking layer of the rectangular plate body has a notch at one end and a boss matching the notch size at the other end. The boss of the mortar anti-cracking layer of the rectangular plate body overlaps the notch of the mortar anti-cracking layer of the adjacent rectangular plate body.

7. The anti-cracking precast concrete plate structure according to claim 1, characterized in that: A glass magnesium bottom plate is bonded to the lower surface of the concrete base.

Images