CN207405842U - An integral fully prefabricated floor slab unsupported connection structure - Google Patents

Abstract

The utility model provides an integral type full-prefabricated assembly floor non-support connecting structure, which is characterized in that a floor is split into a plurality of prefabricated floor plates which are prefabricated to the designed thickness at one time, the thickness of the plate is locally reduced around the prefabricated floor plates, and simultaneously, connecting reinforcing steel bars are reserved for connecting the plates and the plates, the plates and stressed supports (beams and walls), and the plates and the non-stressed supports (beams and walls) and then are covered with concrete to form a complete floor, so that the integrity of the joints of the plates and the support and anchoring effects of the supports (beams and walls) on the plates can be fully ensured; compared with the prior laminated slab technology, the novel connecting structure can complete floor prefabrication through one-step forming, does not have a template during installation, does not basically need to support, only needs to adopt a single support to fix the position temporarily, reduces the thickness of the floor thickness and the prefabricated size, is easy to control, high in precision, good in maintenance condition and excellent in quality, only has a small amount of reserved plate edge seams to be cast in situ on site, and the engineering quality is greatly improved and the construction period can be shortened.

Description

An integral fully prefabricated floor slab unsupported connection structure

technical field

The utility model relates to the construction field, in particular to an assembly integral structure floor and floor, floor and beam, floor and wall unsupported rear cover pouring connection structure.

Background technique

The State Council issued the "Guiding Opinions on Vigorously Developing Prefabricated Buildings" (Guo Ban Fa {2016} No. 71), deciding to vigorously develop prefabricated buildings and promote the adjustment and upgrading of the construction industry. In accordance with the requirements of promoting supply-side structural reform and new urbanization development, vigorously develop steel structure prefabricated buildings (PS), concrete prefabricated buildings (PC), etc., which have the potential to develop new energy-saving and environmental protection industries, improve building safety levels, and promote the resolution of excess Production capacity, etc. serve multiple purposes. Prefabricated reinforced concrete structure buildings are the mainstream technology in the current market, with standardized design of parts and components, factory production, assembly or mechanized construction; generally after a full set of architectural drawing design and detailed design of structural construction drawings, they are produced in the factory PC components such as precast concrete beams, columns, walls, slabs, and stairs are transported to the site for assembly construction.

The current prefabricated integral structure floor generally adopts laminated floor slabs according to Article 6.6.1 and Article 6.6.2 of the national industry technical standard JGJ1-2014 "Technical Regulations for Prefabricated Concrete Structures". At least 70mm of pre-embedded pipelines, and the thinnest floor thickness is 130mm. Compared with the minimum thickness of 100mm for the cast-in-place floor, it increases the amount of concrete and the load of the floor; currently, for some 60mm thick prefabricated slabs, the formwork of the prefabricated slab can be cancelled. However, support needs to be increased, and in order to increase the overall rigidity of the prefabricated slab and the shear performance of the horizontal laminated surface when the slab span is greater than 3 meters, truss reinforcement must be installed in the prefabricated slab, which undoubtedly increases the cost; moreover, the cast-in-place surface The first floor needs to bind steel bars and pour concrete to delay the aging effect. After pouring the floor surface layer, it also takes time (construction period) for the concrete to form a certain strength before it can become a stressed structure and the construction of the next floor can be carried out. Therefore, it is different from the cast-in-place structure. Longer than the construction period.

Contents of the invention

In order to overcome the above problems, this new model provides a floor slab that is prefabricated to the designed thickness at one time. The floor slab is spliced with the floor slab in the non-stress direction and the stressed steel bar is protruded from the end of the floor slab in the stress direction and anchored into the beam and wall. The micro-expansion concrete with a higher strength grade is poured on the back cover and the beam surface layer to form the overall floor. To reduce the thickness of the floor slab and cancel the large-area post-cast concrete, it is convenient for production (prefabrication), transportation, installation, and construction of the floor-to-floor, floor-to-beam, floor-to-wall unsupported back-cast connection structure.

In order to achieve the above object, the technical solution provided by the present invention is:

An integral fully prefabricated floor slab unsupported connection structure, including each prefabricated floor slab is provided with two splicing surfaces connected with stressed supports (beams, walls) and two joints connected with prefabricated floors or non-stressed supports The splicing surface, and the splicing place is provided with a concrete back cover pouring surface.

Each splicing surface includes a No. 1 step and a No. 2 step; at the bottom of the No. 1 step on the force-bearing surface of each prefabricated plate, several stressed steel bars are arranged, and the two ends of the stressed steel bars extend out of the No. 1 step. The length is the anchorage length; the top of the No. 2 step of each prefabricated plate is provided with a number of connecting steel bars, and the two ends of the connecting bars protrude from the No. 2 step until the outer edge of the No. 1 step is flush with the No. 1 step; the adjacent When the two prefabricated slabs are spliced on the non-stressed surface, the No. 1 step is in contact, and the overhanging steel bars on the top of the No. 2 step are respectively welded to the two ends of the additional short bars, and concrete is poured from the No. 1 step to the No. 2 step. Make the two prefabricated panels form a whole; when the two adjacent prefabricated panels are spliced with the non-stressed surface of the support, the No. 1 step is in contact with the support (beam, wall), and the protruding steel bars at the top of the No. 2 step are respectively connected to the additional After the two ends of the short ribs are welded, concrete is poured on the No. 1 step surface to the No. 2 step surface, so that the two prefabricated slabs and the support form a continuous integral floor; The No. 1 step is in contact with the support (beam, wall), the stressed steel bar at the bottom of the No. 1 step is anchored into the support (beam, wall), and the protruding steel bar at the top of the No. From the No. 1 step surface to the No. 2 step surface, the concrete cover is used to make the two prefabricated panels form a continuous stressed overall floor; when the prefabricated panels are connected to the non-stressed support, the No. In contact with each other, the overhanging steel bar at the top of the No. 2 step is extended to the outside of the support by welding and meets the anchorage length. The concrete is poured from the surface of the No. 1 step to the No. 2 step, so that the prefabricated slab and the support form a complete structural exterior. Edge; when the prefabricated slab is connected to the bearing support, the No. 1 step is in contact with the support (beam, wall), the steel bar at the bottom of the No. Welding is extended to the outside of the support and meets the anchorage length, and concrete is poured from the No. 1 step surface to the No. 2 step surface, so that the prefabricated slab and the support form a complete stressed outer edge.

The width of the No. 1 step is ≤1000mm.

Preferably, the width of the No. 1 step is 200mm.

The two ends of the connecting steel bar at the top of the second step protrude from the second step until the outer edge of the first step is flush with the first step.

The bottom of the No. 1 step of each prefabricated floor slab is provided with stress bars at the bottom of the slab, and the length of the two ends of the stress bars protruding from the No. 1 step is the anchorage length.

Additional reinforcing bars are provided at the welds of any two connecting reinforcing bars of the two prefabricated floor slabs.

The benefits of the above technical solution are:

The new model provides an integral fully prefabricated floor slab unsupported connection structure, which prefabricates the floor to the designed thickness at one time, and the floor slab is spliced with the floor in the non-stress direction and the force that protrudes from the bottom of the floor in the force direction After the steel bars are anchored into the support (beams, walls), the micro-expansion concrete with a higher strength grade is used to cover the pouring plate and the beam surface layer to form an integral floor. The floor construction is completed in one step. A single bracket can be used for temporary positioning and fixing. Due to the one-time prefabrication to the designed thickness, the thickness of the floor slab is reduced and the floor load is reduced. The prefabricated size is easy to control, the precision is high, the maintenance conditions are good, and the quality is excellent. The construction period can be shortened.

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Description of drawings

Fig. 1 is a top view schematic diagram of a single prefabricated floor slab in Embodiment 1 of the present invention;

Fig. 2 is A-A sectional view among Fig. 1;

Fig. 3 is B-B sectional view among Fig. 1;

Fig. 4 is a schematic diagram of splicing non-stressed surfaces of two prefabricated panels in Embodiment 1 of the present invention;

Fig. 5 is a schematic diagram of splicing of two prefabricated panels with supports and non-stressed surfaces in Embodiment 1 of the present invention;

Fig. 6 is the schematic diagram one of concrete cover pouring of embodiment 1 of the present invention;

Fig. 7 is the schematic diagram 2 of the pouring of concrete in embodiment 1 of the present invention;

Fig. 8 is a schematic diagram of splicing of two prefabricated panels with support bearing surfaces in Embodiment 2 of the present invention;

Fig. 9 is a schematic diagram of the splicing of the prefabricated plate and the stressed support in Embodiment 3 of the present invention;

Fig. 10 is a schematic diagram of the splicing of the prefabricated plate and the non-stressed support of the third embodiment of the present invention;

Fig. 11 is a schematic diagram of pouring concrete in Embodiment 3 of the present invention.

Detailed ways

Example 1

An integral fully prefabricated assembly floor unsupported connection structure as shown in Figure 1-7, including at least two prefabricated floors 1; each prefabricated floor 1 is provided with at least one set of non-stress splicing surfaces corresponding to each other 10. The splicing surface 10 includes a No. 1 step 101 and a No. 2 step 102; the width of the No. 1 step is A; several connecting reinforcement bars 2 are arranged on the top of the No. 2 step 102 of each prefabricated floor slab. The two ends of 2 extend out No. 2 step 102, and the connecting steel bar 2 stretches out No. 2 step 102 to the outer edge of No. 1 step. Concrete B is poured between one No. 1 step 101 and two No. 2 steps 102, so that the two prefabricated slabs form a whole.

In this embodiment, as shown in Figures 4 and 6, the No. 1 steps of the two adjacent prefabricated floor slabs 1 are in contact, and the No. 2 steps 102 are welded with connecting steel bars 2 and additional short bars and poured with concrete. Setting, realizing the splicing of the non-stressed surfaces of two prefabricated slabs without setting templates and supports.

Of course, in this embodiment, the splicing of non-stressed surfaces is not limited to the splicing of plates, as shown in Figures 5 and 7, the splicing of plates and supports is also possible, that is, the No. 1 step and support In contact with each other, the overhanging steel bar 2 at the top of the No. 2 step is welded to the two ends of the additional short bar 20 respectively, and concrete C is poured between the two No. 1 steps 101 and the two No. 2 steps 102 and the support to make the two prefabricated The slab and the support form a whole, so that the splicing of two prefabricated slabs with the non-stressed surface of the support does not need to be set up with templates and supports.

In this embodiment, the non-forced support may be a beam or a wall.

Example 2

The above is an embodiment of the new model, but it is not limited thereto. As shown in Figures 7 and 8, this embodiment is the connection of two prefabricated panels 1 with support bearing surfaces to form a continuous force-bearing whole of the board span Prefabricated floor; and the difference between this embodiment and Embodiment 1 is: as shown in Figure 8, the No. 1 step 101 of its two prefabricated floor slabs is connected and set by the support, can make No. 1 step 101 bottom stressed steel bar like this 103 is anchored into the support, and after the reinforced steel bar 2 at the top of the second step is welded with both ends of the additional steel bar, concrete C is poured between the two first steps 101 and the two second steps 102 to make the prefabricated plate and the support To form a whole, the lower reinforced steel bar 103 in the prefabricated slab is anchored into the support, and the upper reinforced bar 2 becomes the stressed support negative bar to form a stressed structure, realizing the connection of the prefabricated slab on the stressed support.

In this embodiment, during the installation of each component, it is only necessary to set a single support at the lower part of the prefabricated plate near the support for temporary positioning and fixing, and the support can be removed when the pouring concrete reaches the strength.

In this embodiment, the stressed support may be a beam or a wall.

Example 3

As shown in Figures 9 and 11, an integral fully prefabricated floor slab unsupported connection structure as described in Example 1 has only one prefabricated panel 1, and the No. 1 step 101 of the prefabricated panel is spliced with the support. The reinforced steel bar 103 at the bottom of the No. 1 step 101 is anchored into the support, and the extended steel bar 2 at the top of the No. 2 step is extended to the outside of the support by welding and meets the anchorage length. Concrete D; the difference between this embodiment and embodiment 2 is that the embodiment 2 is applied to the middle plate of the prefabricated floor, and the embodiment of this embodiment is applied to the outer edge plate of the prefabricated floor. During implementation, only It is necessary to set formwork locally on the outer side of the precast floor slab, and set up a single support for temporary positioning and fixing at the lower part of the precast slab near the support. The formwork and support can be removed after the poured concrete reaches the strength.

Of course, in this embodiment, it is not limited to the splicing with the stressed support, as shown in Figure 10, it can also be the spliced with the non-stressed support, that is, the No. 1 step 101 of the prefabricated plate is spliced with the support, and the No. 2 step The protruding steel bar 2 at the top of the step is extended to the outside of the support by welding and meets the anchorage length, and the concrete D is poured between the No. 1 step 101 and No. 2 step 102 and the support; the plate and the stressed support are spliced in this embodiment The difference between the plate and the non-stressed support is that when the plate is spliced with the stressed support, the stressed steel bar 103 at the bottom of the first step 101 is anchored into the support, and when the plate is spliced with the non-stressed support, only No. 1 is needed. It is sufficient that the step 101 is in contact with the support.

Claims (6)

1. a kind of full prefabricated slab of monoblock type is without support connection structure, it is characterised in that：Including at least one block of precast floor slab； Each precast floor slab is both provided with two Mosaic faces being connected with stress bearing or non-stress bearing or other precast floor slabs, And stitching portion is provided with Chinese-style Spaghetti after concrete.

2. a kind of full prefabricated slab of monoblock type as described in claim 1 is without support connection structure, it is characterised in that：Every piece Each Mosaic face of prefabricated chunk includes No.1 step and No. two steps；In the No.1 platform of every piece of prefabricated chunk stress surface Rank bottom is both provided with several steel bar stresses, and the length of No.1 step is stretched out for anchorage length in the both ends of steel bar stress；It is described Several connection reinforcing bars are both provided at the top of No. two steps of every piece of prefabricated chunk, No. two steps are stretched out to one in connection reinforcing bar both ends Number step outer edge is concordant with No.1 step.

3. a kind of full prefabricated slab of monoblock type as claimed in claim 2 is without support connection structure, it is characterised in that：It is described No.1 step width≤1000mm.

4. a kind of full prefabricated slab of monoblock type as claimed in claim 2 is without support connection structure, it is characterised in that：It is described No. two steps at the top of to stretch out No. two steps concordant with No.1 step to No.1 step outer edge at connection reinforcing bar both ends.

5. a kind of full prefabricated slab of monoblock type as described in claim 1 is without support connection structure, it is characterised in that：Institute It states and plate bottom steel bar stress is both provided in the No.1 the bottom of the steps of every block of precast floor slab, No.1 step is stretched out at the both ends of steel bar stress Length be anchorage length.

6. a kind of full prefabricated slab of monoblock type as described in claim 1 is without support connection structure, it is characterised in that：Institute The weld for stating the arbitrary two connections reinforcing bar of two precast floor slabs is both provided with additional bar.