阅读说明：本技术 一种装配式叠合楼板横向连接方法 (Transverse connection method for assembled composite floor slabs ) 是由 何余良 张曙光 韩坚强 肖景平 于 2019-10-25 设计创作，主要内容包括：本发明公开一种装配式叠合楼板横向连接方法,该方法涉及到一种叠合楼板,其包括预制叠合楼板以及后浇叠合层；后浇叠合层位于预制叠合楼板上方；所述预制叠合楼板包括混凝土层,混凝土层内嵌有底板钢筋、钢筋桁架和型钢连接件；相邻两个预制叠合楼板之间通过设置在型钢连接件上的紧固件进行连接；该方法步骤如下：一、完成预制叠合楼板；二、完成预制叠合楼板的吊装；三、完成预制叠合楼板的拼接；四、后浇叠合层的混凝土浇筑；该方法涉及建筑工程技术领域,该方法没有预制叠合板间的后浇带,即可提高装配式建筑结构的整体性和两块叠合楼板横向接缝处的施工质量,又可以提高施工速度。(The invention discloses a transverse connection method for an assembled composite floor slab, which relates to a composite floor slab, and comprises a prefabricated composite floor slab and a post-cast composite layer; the post-cast laminated layer is positioned above the prefabricated laminated floor slab; the prefabricated composite floor slab comprises a concrete layer, wherein bottom plate steel bars, steel bar trusses and profile steel connecting pieces are embedded in the concrete layer; two adjacent prefabricated composite floor slabs are connected through fasteners arranged on the section steel connecting pieces; the method comprises the following steps: firstly, completing the prefabricated composite floor slab; secondly, completing the hoisting of the prefabricated composite floor slab; thirdly, completing the splicing of the prefabricated composite floor slabs; fourthly, pouring concrete of the post-pouring laminated layer; the method relates to the technical field of building engineering, and the method can improve the integrity of an assembled building structure and the construction quality of a transverse joint of two laminated floor slabs and can also improve the construction speed without a post-pouring belt between the prefabricated laminated floor slabs.)

1. A transverse connection method for an assembled composite floor slab is characterized in that: the composite floor slab comprises a prefabricated composite floor slab and a post-cast composite layer; the post-cast laminated layer is positioned above the prefabricated laminated floor slab; the prefabricated composite floor slab comprises a concrete layer, wherein bottom plate steel bars, steel bar trusses and profile steel connecting pieces are embedded in the concrete layer; two adjacent prefabricated composite floor slabs are connected through fasteners arranged on the section steel connecting pieces;

the method comprises the following steps:

firstly, finishing a prefabricated composite floor slab:

firstly, placing a bottom plate steel bar and a steel bar truss at preset positions, and then embedding a profile steel connecting piece at the connecting position of the side edges of the prefabricated composite floor slab;

secondly, completing the hoisting of the prefabricated composite floor slab:

firstly, arranging a floor slab support according to the weight load of the prefabricated composite floor slab and the post-cast composite layer, hoisting the prefabricated composite floor slab, and horizontally placing the prefabricated composite floor slab on the floor slab support;

thirdly, completing the splicing of the prefabricated composite floor slab:

aligning the positions of two ends of the prefabricated composite floor slab hoisted later and the position of two ends of the prefabricated composite floor slab hoisted earlier, and fastening the section steel connecting pieces of the prefabricated composite floor slab and the prefabricated composite floor slab by using fasteners to connect the two prefabricated composite floor slabs into a whole;

fourthly, pouring concrete of the post-cast laminated layer:

and after the fasteners are connected, performing concrete pouring of the post-cast laminated layer, vibrating and compacting, and maintaining to standard strength.

2. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: one side of the profile steel connecting piece, which is close to the prefabricated composite floor slab, is embedded in the prefabricated composite floor slab, and the other side of the profile steel connecting piece is provided with holes with equal intervals and sizes for assembling fasteners.

3. A transverse connecting method of assembled composite floor slabs according to claim 2, wherein: the fastener includes bolt and nut, and the bolt passes the shaped steel connecting piece on two adjacent prefabricated coincide floorslabs in proper order, and the bolt passes the overlapping hole on the shaped steel connecting piece, and nut and bolt cooperation for two shaped steel connecting piece fastening connection realize the connection of two adjacent prefabricated coincide floorslabs.

4. A transverse connecting method of assembled composite floor slabs according to claim 3, wherein: the bolts may alternatively be studs.

5. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: the partial structure of steel bar truss imbeds the concrete layer of prefabricated coincide floor, and the back pouring of partial embedding superposes the layer.

6. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: the prefabricated composite floor slab is provided with a notch at the position where the section steel connecting piece is arranged, and the notch does not penetrate through the whole prefabricated composite floor slab.

7. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: the specific dimensions of the prefabricated laminated floor slab are that the width is 2000 mm, the span length is 3600 mm, and the thickness is 60 mm.

8. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: the section steel connecting piece adopts 5 mm of U-shaped perforated section steel with equal thickness.

9. A transverse connecting method of assembled composite floor slabs according to claim 1, wherein: the concrete thickness of the post-cast laminated layer is 70 mm.

Technical Field

The invention belongs to the technical field of constructional engineering, and particularly relates to a transverse connection method for an assembled composite floor slab.

Background

With the advance of the industrialization process of buildings in China, the assembled buildings are further developed. The large-span floor slab is limited by the hoisting capacity of hoisting equipment, the large-span floor slab is usually formed by splitting the large-span floor slab into a plurality of prefabricated composite floor slabs and then splicing the prefabricated composite floor slabs, the joint of the two composite floor slabs is constructed in a cast-in-place mode, and the strength of the joint is weak due to the existence of construction joints, so that the safety of the whole structure is reduced. In order to improve the overall performance of a composite floor slab, the existing treatment method is to extend the beard ribs from two sides of a prefabricated composite slab, reserve a post-cast strip and pour the post-cast strip together with a cast-in-place layer, the prefabricated composite slab with the beard ribs brings adverse effects to transportation and hoisting, the construction speed is also influenced, and a reasonable connection mode needs to be found for further promoting the application and development of an assembled building structure in building engineering.

In view of the above problems, the present invention provides a method for transverse connection of fabricated composite floor slabs.

Disclosure of Invention

The invention provides a transverse connection method for assembled composite floor slabs, which is characterized in that the prefabricated composite slabs used in the method have no influence of beard ribs in transportation and hoisting and no post-cast strip between the prefabricated composite slabs.

Specifically, the invention is realized by the following technical scheme:

a transverse connection method for an assembled composite floor slab comprises the steps of prefabricating the composite floor slab and post-pouring a laminated layer; the post-cast laminated layer is positioned above the prefabricated laminated floor slab; the prefabricated composite floor slab comprises a concrete layer, wherein bottom plate steel bars, steel bar trusses and profile steel connecting pieces are embedded in the concrete layer; two adjacent prefabricated composite floor slabs are connected through fasteners arranged on the section steel connecting pieces;

the method comprises the following steps:

firstly, finishing a prefabricated composite floor slab:

firstly, placing a bottom plate steel bar and a steel bar truss at preset positions, and then embedding a profile steel connecting piece at the connecting position of the side edges of the prefabricated composite floor slab;

secondly, completing the hoisting of the prefabricated composite floor slab:

firstly, arranging a floor slab support according to the weight load of the prefabricated composite floor slab and the post-cast composite layer, hoisting the prefabricated composite floor slab, and horizontally placing the prefabricated composite floor slab on the floor slab support;

thirdly, completing the splicing of the prefabricated composite floor slab:

aligning the positions of two ends of the prefabricated composite floor slab hoisted later and the position of two ends of the prefabricated composite floor slab hoisted earlier, and fastening the section steel connecting pieces of the prefabricated composite floor slab and the prefabricated composite floor slab by using fasteners to connect the two prefabricated composite floor slabs into a whole;

fourthly, pouring concrete of the post-cast laminated layer:

and after the fasteners are connected, performing concrete pouring of the post-cast laminated layer, vibrating and compacting, and maintaining to standard strength.

Further, be close to prefabricated coincide floor one side pre-buried in prefabricated coincide floor in the shaped steel connecting piece, the opposite side is provided with equidistant, the hole of size for the fastener is connected.

Further, the fastener includes bolt and nut, and the bolt passes the shaped steel connecting piece on two adjacent prefabricated coincide floorslabs in proper order, and the bolt passes the overlapping hole on the shaped steel connecting piece, nut and bolt cooperation for two shaped steel connecting piece fastening connection realize the assembly of two adjacent prefabricated coincide floorslabs.

Preferably, the bolt is selected to be a stud bolt.

Furthermore, partial structure of the steel bar truss is embedded into the concrete layer of the prefabricated composite floor slab, and partial structure of the steel bar truss is embedded into the post-cast composite layer.

In order to make shaped steel connecting piece and prefabricated coincide floor better be connected, the notch is reserved at the position that sets up shaped steel connecting piece to prefabricated coincide floor, and the notch does not run through whole prefabricated coincide floor.

Further, the specific dimensions of the prefabricated laminated floor slab are 2000 mm in width, 3600 mm in length and 60 mm in thickness.

Further, the section steel connecting piece adopts 5 mm-thick U-shaped perforated section steel with equal thickness;

further, the concrete thickness of the post-cast laminated layer was 70 mm.

The beneficial effect of above-mentioned scheme lies in:

1. the components are prefabricated in a factory, and the performance and the quality of the components are ensured:

by adopting the invention, as the integral structures of the prefabricated composite floor slabs are all prefabricated by factories, the maintenance environment and the component quality are ensured compared with the traditional cast-in-place reinforced concrete floor slabs.

2. The assembly construction, the efficiency of construction is high, and is little to the surrounding environment influence:

compared with the common cast-in-place reinforced concrete floor, the invention has the advantages that after the integral structure of the prefabricated composite floor is completed in a factory, the prefabricated composite floor is conveyed to a construction site, the temporary floor support is built, the prefabricated composite floor is hoisted in place by adopting hoisting equipment, and the two composite floors are connected in a mechanical connection mode, so that the use amount and the wet operation of templates are reduced, the construction speed is high, and the influence on the surrounding environment is small.

3. The wholeness and the anti-seismic performance are high, and the appearance is not influenced:

compared with the prefabricated composite floor slab with the beard ribs, the prefabricated composite floor slab has no influence of the beard ribs during transportation and hoisting, and has no post-cast strip between the prefabricated composite floor slabs; compared with the mode of directly splicing the splicing seams of the prior composite floor slabs, the integrity and the shock resistance are obviously improved due to the existence of the connecting pieces. In addition, the connecting piece is embedded in the laminated slab, so that the appearance of the laminated slab is not influenced, and the connecting piece can be prevented from being rusted too early.

Drawings

FIG. 1 is a cross-sectional view of a composite floor slab of the present invention;

FIG. 2 is a layout view of two prefabricated composite floor slabs according to the present invention;

FIG. 3 is a layout view of prefabricated composite floor slab connectors according to the present invention;

figure 4 is a three-dimensional view of a profile connector of the present invention.

Wherein: 1. overlapping the floor slabs; 2. prefabricating a composite floor slab; 21. a concrete layer; 22. a bottom plate steel bar; 23. a steel bar truss; 24. a section steel connecting piece; 25. a notch; 3. post-pouring a superposed layer; 4. a fastener; 41. a nut; 42. and (4) bolts.

The specific implementation mode is as follows:

the invention is further described with reference to the following figures and detailed description.

As shown in fig. 1, 2 and 3, the transverse connection method for assembled composite floor slabs provided by the invention relates to a composite floor slab 1, wherein the composite floor slab 1 comprises a prefabricated composite floor slab 2 and a post-cast composite layer 3; the post-cast laminated layer 3 is positioned above the prefabricated laminated floor slab 2 and is tightly combined with the prefabricated laminated floor slab 2; prefabricated coincide floor 2 includes concrete layer 21, and concrete layer 21 is embedded to have bottom plate reinforcing bar 22 and steel bar truss 23, has inlayed shaped steel connecting piece 24 on concrete layer 21, and shaped steel connecting piece 24 is in the one end of prefabricated coincide floor 2 upside, and notch 25 is reserved at shaped steel connecting piece 24 position to prefabricated coincide floor 2, for not influencing prefabricated coincide floor 2's outward appearance, notch 25 does not run through. Two adjacent prefabricated composite floor slabs 2 are connected through a section steel connecting piece 24.

As shown in fig. 4, a specific way of connecting two adjacent prefabricated composite floor slabs 2 is as follows: the section steel connecting piece 24 is made of U-shaped section steel, one side close to the prefabricated composite floor slab 2 is embedded in the U-shaped section steel, and the other side is provided with holes with equal intervals and sizes so as to be convenient for the connection of the fastening pieces 4; the profiled bar connecting pieces 24 on two adjacent prefabricated composite floor slabs 2 are overlapped, holes in the two profiled bar connecting pieces 24 are overlapped, the two profiled bar connecting pieces are connected through the fastening pieces 4, namely the bolts 42 penetrate through the overlapped holes in the profiled bar connecting pieces 24, the nuts 41 are matched with the bolts 42, the two profiled bar connecting pieces 24 are fastened and connected, and therefore the connection of the two adjacent prefabricated composite floor slabs 2 is achieved.

The holes of the section steel connecting piece 24 are in an approximately elliptical shape consisting of a rectangle and two semicircles, so that the problem that the hole alignment cannot be assembled due to errors in field splicing can be prevented.

The steel bar truss 23 is embedded between the prefabricated composite floor slab 2 and the post-cast laminated layer 3, namely, part of the structure of the steel bar truss 23 is embedded in the concrete layer 21 of the prefabricated composite floor slab 2, and part of the structure is embedded in the post-cast laminated layer 3.

In the invention, the strength of concrete and steel bars in the actual composite floor slab 1 is determined by calculation according to the magnitude of the dead load and live load of the actual prefabricated composite floor slab 2 through the existing standard.

In the invention, the strength, the hole size and the space of the section steel connecting piece 24 are determined by the existing standard calculation according to the size of the dead load and live load of the actual composite floor slab 1.

In the invention, the connection between the two section steel connecting pieces 24 adopts the mechanical connection between the bolt 42 and the nut 41 of the fastener 4.

In the invention, the size, the number and the arrangement of the bolts 42 and the nuts 41 of the fastener 4 are determined by calculation according to the existing specifications according to the constant load and the live load of the actual laminated floor slab 1.

The bolts 42 are preferably studs.

The invention provides a transverse connection method of an assembled composite floor slab, which comprises the following specific implementation steps:

firstly, finishing the prefabricated composite floor slab 2:

firstly, placing a bottom plate steel bar 22 and a steel bar truss 23 at preset positions, and then pre-burying a section steel connecting piece 24 at the connecting position of the side edge of the bottom plate of the prefabricated composite floor slab 2;

secondly, the hoisting of the prefabricated composite floor slab 2 is completed:

firstly, arranging a floor slab support according to the weight load of the prefabricated composite floor slab 2 and the post-cast composite layer 3, hoisting the prefabricated composite floor slab 2, and horizontally placing the prefabricated composite floor slab on the floor slab support;

thirdly, splicing the prefabricated composite floor slab 2:

aligning the positions of two ends of the prefabricated composite floor slab 2 hoisted later and the prefabricated composite floor slab 2 hoisted earlier, penetrating the stud through the profile steel connecting piece 24 and compacting by using the nut 41, and connecting the two prefabricated composite floor slabs 2 into a whole;

fourthly, pouring concrete of the post-cast laminated layer 3:

and after the fasteners 4 are connected, pouring concrete of the post-cast laminated layer 3, vibrating and compacting, and maintaining to standard strength.

This kind of assembled coincide floor 1 comprises prefabricated coincide floor 2, shaped steel connecting piece 24, fastener 4, and fastener 4 comprises bolt 42 and nut 41, and this kind of connected form is prefabricated in the mill, the completion is assembled on the spot, and the wholeness and the intensity of prefabricated coincide floor 2 can obtain improving, and prefabricated coincide floor 2 can directly regard as the template of post-cast laminated layer 3 concrete placement, has improved the efficiency of construction for the construction progress.

The size of the prefabricated composite floor slab 2 refers to the relevant parameters of the reinforced concrete composite slab of the steel bar truss 23 in the national building standard design drawing set 15G 366-1.

In the invention, the concrete dimensions of a prefabricated composite floor slab 2 are as follows: the width of the unidirectional plate is 2000 mm, the span length of the unidirectional plate is 3600 mm, and the thickness of the unidirectional plate is 60 mm;

the section steel connecting piece 24 can adopt 5 mm-thick U-shaped perforated section steel;

the concrete thickness of the post-cast laminated layer 3 may be 70 mm.

The above is the preferred embodiment of the present invention, and several other simple substitutions and modifications made on the premise of the inventive concept should be considered as falling into the protection scope of the present invention.