Precast slab without rib exposure in grouting connection

Abstract

The utility model relates to a non-rib-out prefabricated slab connected through grouting. The non-rib-out prefabricated slab comprises a prefabricated concrete slab, the multiple load-bearing steel bars are arranged in the length direction and the width direction of the prefabricated concrete slab at certain intervals; one end of the pre-embedded connecting piece is connected with the end of the load-bearing steel bar in a sleeving mode, a cavity is formed in the pre-embedded connecting piece, and a grouting guide pipe is arranged on the pre-embedded connecting piece and communicates with the cavity; the grouting guide pipe extends out of the plate surface of the precast concrete plate; the laminated concrete layer is laid on the surface of the precast concrete slab; one end of the connecting steel bar extends into the embedded connecting piece and is in lap joint with one end of the load-bearing steel bar. The ends of the load-bearing steel bars of the prefabricated plate are wrapped by the cavity pre-buried connecting pieces and do not extend out of the section of the component, and the connecting steel bars are placed for grouting connection during construction, so that the load-bearing steel bars and the connecting steel bars form a reliable steel bar connection whole, and the problem that the steel bars extend out during production of the prefabricated plate is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, in particular to a prefabricated board without reinforcement connected by grouting. Background Art

[0002] Prefabricated concrete structures meet the social requirements of resource conservation and environmental friendliness proposed by my country, and are one of the effective ways to achieve energy conservation and emission reduction in buildings and residential industrialization. Prefabricated horizontal components are an important type of component for prefabricated concrete, including composite slabs and fully prefabricated slabs, among which composite slabs are the most widely used. At present, the main production method of prefabricated slabs is factory steel mold production. Since the production of traditional prefabricated concrete slabs requires extended steel bars, the steel molds cannot be universal, and the production difficulty and production cost of prefabricated concrete slabs have remained high. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a prefabricated plate with no protruding reinforcement that is connected by grouting. The ends of the stress-bearing reinforcement of the prefabricated plate are wrapped with cavity embedded connecting parts so that they no longer protrude out of the component cross section. Additional reinforcement is placed during construction for grouting connection, so that the stress-bearing reinforcement and the connecting reinforcement form a reliable reinforcement connection as a whole, thus solving the problem of protruding reinforcement during the production of prefabricated plates.

[0004] In order to solve the above technical problems, the utility model provides a prefabricated plate without reinforcement connected by grouting, comprising:

[0005] Precast concrete panels;

[0006] The stress-bearing steel bars include a plurality of steel bars, which are arranged at a certain interval along the length direction and the width direction of the precast concrete slab;

[0007] An embedded connector, one end of which is sleeved with the end of the stressed steel bar, a cavity is provided in the embedded connector, a grouting conduit is provided on the embedded connector and communicates with the cavity; the grouting conduit extends out of the board surface of the precast concrete board;

[0008] The laminated concrete layer is laid on the surface of the precast concrete slab to form a complete concrete force-bearing system;

[0009] One end of the connecting steel bar extends into the embedded connecting piece and overlaps with one end of the stress-bearing steel bar; after grouting in the embedded connecting piece, the connecting steel bar, the stress-bearing steel bar and the embedded connecting piece are solidified together.

[0010] In one embodiment of the present invention, one end of the embedded connecting piece away from the stressed steel bar is flush with the end surface of the precast concrete slab.

[0011] In one embodiment of the present invention, the precast concrete slab is a composite slab, and a layer of stress-bearing steel bars is laid in the composite slab.

[0012] In one embodiment of the utility model, the precast concrete slab is a fully precast slab, on which two layers of stress-bearing steel bars are laid, and each layer of stress-bearing steel bars is provided with a layer of embedded connectors.

[0013] In one embodiment of the utility model, the length of the grouting conduit on the embedded connection piece of the upper layer in the fully prefabricated panel is shorter than the length of the grouting conduit on the embedded connection piece of the lower layer.

[0014] In one embodiment of the utility model, the grouting conduits on the embedded connectors of the upper layer in the fully prefabricated panel are staggered with the grouting conduits on the embedded connectors of the lower layer.

[0015] In one embodiment of the utility model, before the connecting steel bar extends into the embedded connecting piece, the embedded connecting piece is temporarily sealed.

[0016] In one embodiment of the utility model, the embedded connecting piece is one of a grouting sleeve, a corrugated pipe, a square steel pipe or a round steel pipe.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The utility model discloses a prefabricated slab with non-extending reinforcement connected by grouting, in which the end of the stressed steel bar extends into the embedded connecting piece and does not extend out of the boundary of the prefabricated concrete slab, that is, does not extend out of the boundary of the template during production. During construction, connecting steel bars are placed in the embedded connecting piece and connected by grouting, so that the stressed steel bars and the connecting steel bars form a reliable steel bar connection as a whole, which solves the problem of protruding steel bars during the production of prefabricated slabs and ensures the reliability and safety of the steel bar connection. The construction is convenient and there is no hidden project, which is of great significance to the development of prefabricated buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0020] Figure 1 It is a structural schematic diagram of a prefabricated plate without reinforcement connected by grouting in the first embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the connection between the prefabricated plate without reinforcement connected by grouting and the support reinforcement in the first embodiment of the present invention.

[0022] Figure 3This is a schematic diagram of the connection of the steel bars in the joints between adjacent grouting prefabricated panels without reinforcement in the first embodiment of the present invention;

[0023] Figure 3 (a) is a schematic diagram of the structure of adjacent grouting-connected prefabricated panels that are not spliced ​​into place in Example 1;

[0024] Figure 3 (b) is a schematic diagram of the structure after adjacent grouting-connected prefabricated panels without reinforcement are spliced ​​in place in Example 1;

[0025] Figure 4 It is a structural schematic diagram of a prefabricated plate without reinforcement connected by grouting in the second embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the connection between the prefabricated plate without reinforcement connected by grouting and the support reinforcement in the second embodiment of the present utility model.

[0027] Figure 6 This is a schematic diagram of the connection of the steel bars in the joints between adjacent grouting prefabricated panels without reinforcement in the second embodiment of the present invention;

[0028] Figure 6 (a) A schematic diagram of the structure of adjacent unreinforced prefabricated panels connected by grouting in Example 2 that are not spliced ​​into place;

[0029] Figure 6 (b) A schematic diagram of the structure of adjacent grouting-connected prefabricated panels without reinforcement after they are spliced ​​into place in Example 2;

[0030] Explanation of the reference numerals in the drawings in the specification: 1. Precast concrete slab; 11. Composite slab; 12. Fully precast slab; 2. Embedded connectors; 3. Stress-bearing steel bars; 4. Composite concrete layer; 5. Connecting steel bars; 6. Grouting duct. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0032] Embodiment 1

[0033] Reference Figure 1-3As shown, the utility model discloses a prefabricated slab without reinforcement connected by grouting, comprising: a prefabricated concrete slab 1; a plurality of stress-bearing steel bars 3, which are arranged at a certain interval along the length and width of the prefabricated concrete slab 1; an embedded connector 2, one end of which is sleeved with the end of the stress-bearing steel bar 3, a cavity is provided in the embedded connector 2, a grouting conduit 6 is provided on the embedded connector 2 and is connected with the cavity; the grouting conduit 6 extends out of the slab surface of the prefabricated concrete slab 1; a laminated concrete layer 4 is laid on the surface of the prefabricated concrete slab 1 to form a complete concrete stress-bearing system; a connecting steel bar 5, one end of which extends into the embedded connector 2 and overlaps with one end of the stress-bearing steel bar 3; the connecting steel bar 5 is a steel bar of suitable diameter, which is processed into a certain shape, such as a straight line, a hooked shape, a broken line shape, etc. After grouting in the embedded connector 2, the connecting steel bar 5 is condensed with the stress-bearing steel bar 3 and the embedded connector 2.

[0034] Preferably, one end of the embedded connector 2 away from the stress-bearing steel bar 3 is flush with the end surface of the precast concrete slab 1 .

[0035] The precast concrete slab 1 in this embodiment is a composite slab 11 , in which a layer of stress-bearing steel bars 3 is laid.

[0036] In this embodiment, the embedded connection member 2 can be in the form of a grouting sleeve, a corrugated pipe, a square steel pipe, a round steel pipe, etc.

[0037] During the production of the precast slab without reinforcement connected by grouting, the stress-bearing steel bar 3 passes through the embedded connector 2 from one end and does not extend out of the other end, i.e., the grouting end of the embedded connector 2. The grouting end of the embedded connector 2 is blocked during production to form a grouting cavity; the grouting conduit 6 on the embedded connector 2 extends upward from the surface of the precast concrete slab 1 to facilitate grouting during construction. During factory production, the embedded connector 2 and the stress-bearing steel bar 3 are embedded in the concrete together.

[0038] The construction steps of the prefabricated slab without reinforcement connected by grouting of the above structure are as follows:

[0039] Step 1: produce a precast concrete slab 1, arrange the stressed steel bars 3 at a certain interval, set embedded connectors 2 at the ends of the steel bars, and set a grouting conduit 6 on the embedded connectors 2, extending upward from the surface of the entire precast slab 12 to facilitate grouting during construction; temporarily seal the connection ends of the embedded connectors 2 to prevent concrete from entering, and pour concrete to form a precast concrete slab 1;

[0040] Step 2: hoist the precast concrete slab 1 at the construction site, remove the temporary blocking measures of the embedded connector 2, insert the connecting steel bar 5, and perform grouting. After observing that the grouting is completed, seal the connecting end to complete the steel bar connection; when the precast concrete slab 1 is hoisted at the construction site, the whole slab is supported on the support, or multiple slabs are spliced ​​and supported on the support to form a complete force system.

[0041] Step 3: Cast the superimposed concrete layer 4 on site to complete the construction.

[0042] Embodiment 2

[0043] Reference Figure 4-6 As shown, the utility model describes a grouting-connected precast slab without reinforcement, comprising: a precast concrete slab 1; a plurality of stress-bearing steel bars 3, which are arranged at a certain interval along the length and width directions of the precast concrete slab 1; an embedded connector 2, one end of which is sleeved with the end of the stress-bearing steel bar, a cavity is provided in the embedded connector 2, a grouting conduit 6 is provided on the embedded connector 2 and is connected with the cavity; the grouting conduit 6 extends out of the slab surface of the precast concrete slab 1; an overlay concrete layer 4 is laid on the surface of the precast concrete slab 1 to form a complete concrete stress-bearing system; a connecting steel bar 5, one end of which extends into the embedded connector 2 and overlaps with one end of the stress-bearing steel bar 3; after grouting in the embedded connector 2, the connecting steel bar 5 is solidified with the stress-bearing steel bar 3 and the embedded connector 2.

[0044] Preferably, one end of the embedded connector 2 away from the stress-bearing steel bar 3 is flush with the end surface of the precast concrete slab 1 .

[0045] In this embodiment, the grouting conduit 6 is vertically arranged to the embedded connecting piece 2 .

[0046] Preferably, the grouting end of the grouting conduit 6 is bent.

[0047] The precast concrete slab 1 in this embodiment is a fully precast slab 12 , on which two layers of stress-bearing steel bars 3 are laid, and each layer of stress-bearing steel bars 3 is provided with a corresponding layer of embedded connectors 2 .

[0048] Preferably, the length of the grouting conduit 6 on the embedded connector 2 of the upper layer in the fully prefabricated panel 12 is shorter than the length of the grouting conduit 6 on the embedded connector 2 of the lower layer.

[0049] Preferably, the grouting conduit 6 on the embedded connector 2 of the upper layer in the fully prefabricated panel 12 is staggered with the grouting conduit 6 on the embedded connector 2 of the lower layer.

[0050] In this embodiment, before the connecting steel bar 5 extends into the embedded connecting member 2, the connecting end of the embedded connecting member 2 is temporarily blocked.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A prefabricated board without reinforcement connected by grouting, characterized in that: include: Precast concrete panels; The stress-bearing steel bars include a plurality of steel bars, which are arranged at a certain interval along the length direction and the width direction of the precast concrete slab; An embedded connector, one end of which is sleeved with the end of the stressed steel bar, a cavity is provided in the embedded connector, a grouting conduit is provided on the embedded connector and communicates with the cavity; the grouting conduit extends out of the board surface of the precast concrete board; The laminated concrete layer is laid on the surface of the precast concrete slab to form a complete concrete force-bearing system; One end of the connecting steel bar extends into the embedded connecting piece and overlaps with one end of the stress-bearing steel bar; after grouting in the embedded connecting piece, the connecting steel bar, the stress-bearing steel bar and the embedded connecting piece are solidified together.

2. The prefabricated board without reinforcement connected by grouting according to claim 1, characterized in that: One end of the embedded connecting piece away from the stressed steel bar is flush with the end surface of the precast concrete slab.

3. The prefabricated board without reinforcement connected by grouting according to claim 1, characterized in that: The precast concrete slab is a composite slab, in which a layer of stress-bearing steel bars is laid.

4. The prefabricated board without reinforcement connected by grouting according to claim 1, characterized in that: The precast concrete slab is a fully precast slab, on which two layers of stress-bearing steel bars are laid, and each layer of stress-bearing steel bars is provided with a layer of embedded connectors correspondingly.

5. The prefabricated board without reinforcement connected by grouting according to claim 4, characterized in that: The length of the grouting conduit on the embedded connector of the upper layer in the fully prefabricated panel is shorter than the length of the grouting conduit on the embedded connector of the lower layer.

6. The prefabricated board without reinforcement connected by grouting according to claim 5, characterized in that: The grouting conduits on the embedded connectors of the upper layer in the fully prefabricated panel are staggered with the grouting conduits on the embedded connectors of the lower layer.

7. The prefabricated board without reinforcement connected by grouting according to claim 1, characterized in that: Before the connecting steel bar extends into the embedded connecting piece, the embedded connecting piece is temporarily blocked.

8. The prefabricated board without reinforcement connected by grouting according to claim 1, characterized in that: The embedded connecting piece is one of a grouting sleeve, a corrugated pipe, a square steel pipe or a round steel pipe.

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