CN115341700A - Composite floor slab and construction method thereof - Google Patents

Abstract

A composite floor slab and a construction method thereof relate to the field of buildings. A composite floor slab comprises a concrete bottom plate, a concrete rib plate and a stiffening rib; the stiffening ribs comprise a left rib positioned on the left side and a right rib positioned on the right side, the left rib is provided with a first hole which penetrates through the left rib from left to right, and the right rib is provided with a second hole which penetrates through the right rib from left to right; the part, located between two adjacent first open holes, of the left rib is used as a first connecting column, and the part, located between two adjacent second open holes, of the right rib is used as a second connecting column; the top of the left rib and the right rib are inserted into the concrete rib plate, and the bottom of the left rib and the right rib are inserted into the concrete bottom plate; the distance between the left rib and the right rib gradually increases from the concrete rib plate to the concrete bottom plate; and a gap is formed between the concrete bottom plate and the concrete rib plate, so that the first opening and the second opening are partially or completely leaked. The invention is convenient for the arrangement of pipelines.

Description

Composite floor slab and construction method thereof

technical field

The present invention relates to the field of construction, in particular to construction floors.

Background technique

Stiffener laminated slabs are one of the common slabs on the market, including a concrete base slab located below, a concrete rib slab located above, and stiffeners connecting the concrete base slab and concrete ribs. The concrete floor, concrete ribs, and stiffeners of the existing stiffener laminated floor slabs are mostly prefabricated and connected in the prefabrication yard, and then transported to the construction site for construction. This method can effectively improve the efficiency of on-site construction and reduce the pollution caused by on-site construction. However, since the three parts have been connected in advance, it is inconvenient to insert ventilation pipes, threading pipes and other equipment between the concrete floor and concrete ribs. Moreover, it is prone to bump damage during transportation.

Contents of the invention

The object of the present invention is to provide a composite floor slab and its construction method to solve the above problems.

The technical problem solved by the present invention can adopt following technical scheme to realize:

A composite floor slab, comprising a concrete floor, concrete ribs, and stiffening ribs; characterized in that, the stiffening ribs include a left rib on the left side and a right rib on the right side, and the left rib is provided with a left and right penetrating second rib. an opening, the right rib is provided with a second opening that penetrates left and right;

The part of the left rib located between two adjacent first openings is used as a first connecting column, and the part of the right rib located between two adjacent second openings is used as a second connecting column;

The tops of the left and right ribs are inserted into the concrete ribs, and the bottoms of the left and right ribs are inserted into the concrete floor;

The distance between the left rib and the right rib gradually increases from the concrete rib to the concrete floor;

A gap is provided between the concrete bottom plate and the concrete ribs, so that the first opening and the second opening partially or completely leak outside.

As a preferred solution, the left rib and the right rib are both "U"-shaped light steel keels, and the light steel keel includes a plate-shaped first steel plate, and the top end of the first steel plate is connected with a second Two steel plates, the bottom end of the first steel plate is connected with a third steel plate;

At least the second steel plate is embedded in the concrete rib, and at least two third steel plates are embedded in the concrete floor;

The two light steel keels are set in mirror image, and the first steel plate has left and right through holes, the hole on the left light steel keel is used as the first opening, and the hole on the right light steel keel is used as the first opening. Second opening.

As another preferred solution, both the left rib and the right rib are first steel bars in a triangular wave shape, and the two first steel bars are arranged as mirror images, and the wave crests of the two first steel bars are offset and welded together so as to be located on the left side. The space between the crest and the trough of the first reinforcing bar on the side is used as the first opening, and the space between the crest and the trough of the first reinforcing bar on the right is used as the second opening;

The crests of at least two first steel bars are embedded in the concrete ribs, and the wave troughs of at least two first steel bars are embedded in the concrete bottom plate.

Preferably, the composite floor slab also includes an "L"-shaped angle steel formwork, the angle steel formwork is composed of a vertical plate positioned in the vertical direction and a horizontal plate positioned in the horizontal direction;

There are two angle steel templates, which are respectively a left angle steel template and a right angle steel template;

The horizontal plate of the left angle steel formwork has a first notch for inserting the first connecting column, and the horizontal plate of the right angle steel formwork has a second notch for inserting the second connecting column.

A construction method for a composite floor slab, characterized in that,

Step 1. Make a concrete floor with stiffeners: insert the bottom of the stiffeners into the mold for making the concrete floor, pour concrete into the mold, and remove the mold to obtain a concrete floor with stiffeners after the concrete solidifies;

Step 2. Laying pipelines: transport the concrete bottom slab with stiffeners to the construction site and hoist it to the designated position, then place the pipelines between two adjacent troughs of the first steel bar;

Step 3. Make concrete ribs: insert the left angle steel formwork from the left side of the stiffener to the right to the first connecting column, insert the right angle steel formwork from the right side of the stiffener to the left to the second connecting column, and insert When the horizontal plates of the two angle steel formworks are pressed against each other, at this moment, the left angle steel formwork and the right side angle steel formwork form a perfusion groove with an opening facing upwards, pour concrete into the perfusion groove, and after the concrete is solidified, the concrete ribs;

Another construction method of a composite floor slab, characterized in that,

Step 1. Make a concrete floor with stiffeners: insert the bottom of the stiffeners into the mold for making the concrete floor, pour concrete into the mold, and remove the mold to obtain a concrete floor with stiffeners after the concrete solidifies;

Step 2. Make concrete ribs: at the prefabrication site or construction site, insert the left angle steel formwork from the left side of the stiffener to the right to the first connecting column, and insert the right angle steel formwork from the right side of the stiffener to the left The second connecting column is plugged into the horizontal plates of the two angle steel formworks against each other. At this time, the left angle steel formwork and the right angle steel formwork form an upward pouring groove, and pour concrete into the pouring groove. After the concrete is solidified, the concrete ribs are obtained to form composite panels with stiffeners;

Step 3. Laying pipelines: After hoisting the composite slab with stiffeners to the designated position, let the pipelines pass through the gap surrounded by the first steel bar, the concrete floor and the concrete ribs.

Beneficial effect:

1. The present invention optimizes the structure of the stiffener, and adds a first opening and a second opening to facilitate the laying of pipelines by using the first opening and the second opening;

2. The present invention optimizes the construction method, and changes the concrete rib slab poured in the prefabricated site into a concrete rib slab poured on site, which can temporarily close the top of the stiffener, so that the pipeline can be put into the first opening from the gap at the top of the stiffener, inside the second opening, which further facilitates the laying of pipelines;

3. The present invention is additionally equipped with an angle steel formwork, and the concrete ribs can be poured on site by using the angle steel formwork;

4. The present invention selects light steel keel as the material of the stiffener, which has strong deformation resistance and allows reinforcement on one side in the horizontal direction or one side in the longitudinal direction. The difficulty of distance control on the construction site is greatly reduced compared with the existing laminated slabs.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is another kind of structural representation of the present invention;

Fig. 3 is a partial structural representation of the structure in Fig. 1 of the present invention;

Fig. 4 is the structural representation of light steel keel;

Fig. 5 is a kind of structural representation of stiffener;

Fig. 6 is another structural schematic diagram of a stiffener;

Fig. 7 is a kind of structural representation of angle steel formwork;

Fig. 8 is a reference diagram of the use state of the angle steel formwork.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

With reference to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7 and Figure 8,

A Construction Method of Composite Floor Slab

Step 1. Make a concrete floor with stiffeners: insert the bottom of the stiffeners into the mold for making the concrete floor, pour concrete into the mold, and remove the mold to obtain a concrete floor with stiffeners after the concrete solidifies;

Step 2. Laying pipelines: transport the concrete bottom slab with stiffeners to the construction site and hoist it to the designated position, then place the pipelines between two adjacent troughs of the first steel bar;

Step 3. Make concrete rib 3: Insert the left angle steel formwork from the left side of the stiffener to the right to the first connecting column, insert the right angle steel formwork from the right side of the stiffener to the left to the second connecting column, insert The horizontal plates connected to the two angle steel formworks are pressed against each other. At this time, the left angle steel formwork and the right angle steel formwork form a pouring groove with the opening facing upward, and concrete is poured into the pouring groove. After the concrete is solidified, the concrete rib 3 is obtained. ;

Another Construction Method of Composite Floor Slab

Step 1. Make a concrete floor with stiffeners: Insert the bottom of the stiffeners into the mold for making the concrete floor, pour concrete into the mold, and after the concrete solidifies, remove the mold to obtain a concrete floor with stiffeners; Step 2. Make concrete Rib 3: At the prefabrication site or construction site, insert the left angle steel formwork from the left side of the stiffener to the right to the first connecting column, and insert the right angle steel formwork from the right side of the stiffener to the left to the second connecting column , the horizontal plates 8 plugged into the two angle steel formworks are pressed against each other. At this time, the left angle steel formwork and the right angle steel formwork form a pouring groove with the opening facing upward, and pour concrete into the pouring groove. After the concrete is solidified, the concrete Rib 3, thereby forming a composite slab with stiffeners; Step 3. Laying pipelines: After hoisting the composite slab with stiffeners to the designated position, let the pipelines pass through the first steel bar and the concrete bottom slab and concrete ribs 3. in the gap.

The above two construction methods may also include step 4. Filling the bottom joint: filling the gap between two adjacent concrete bottom slabs 2 with a caulking material. The joint filling material is preferably UHPC high-strength concrete. The gap between the concrete base plates 2 is preferably 2 cm. The present invention selects the gap filling material and gap size, and the floor slab obtained after selection is not easy to crack. Preferably, during construction, the side end faces of the concrete bottom slabs 2 are offset, adhesive tapes are pasted on the bottom joints of the two connected concrete bottom slabs 2, and concrete mortar is poured to the joints by using chamfering, and the concrete mortar to be poured is torn off after solidification. Peel off the bottom tape.

In the above two construction methods, the concrete bottom plate 2 can be rice husk concrete or wood fiber concrete, both of which can effectively prevent the bottom plate from cracking, and can also play the role of thermal insulation and sound insulation. Preferably, rice husk concrete. Rice husk concrete allows the floor to be less than 6 cm, which can effectively reduce the structural load.

The above two construction methods can also include step five. Place functional materials: place functional materials between the concrete floor 2 and the concrete ribs 3, such as thermal insulation materials, so as to play the role of thermal insulation, and then such as weight-reducing materials, so that Play a role in reducing the weight of the floor.

In the above two construction methods, detection equipment can be preset in the concrete floor 2, such as fire alarm equipment, fire sprinkler equipment, smoke detection equipment, burglar alarm equipment, etc.

The above two construction methods may also include step 6. Place the concrete roof 1 : connect the concrete roof 1 to the concrete rib 3 . Yes, the lower end surface of the concrete roof 1 is provided with a groove opening downward, and the concrete rib 3 is inserted into the groove. It is also possible that the concrete roof 1 is provided with a stepped structure near the edge, and the concrete roof 1 sits on the concrete rib 3 using the stepped structure. Under this structure, it is convenient to dismantle the concrete roof 1 in the later stage and maintain the pipelines under it. There is a gap between the concrete top plates 1, the gap is preferably 2 cm, and the gap filling material is preferably UHPC high-strength concrete.

In the above two construction methods, the structure of the stiffener may be: including the left rib 4 and the right rib. The left rib 4 and the right rib are both "U"-shaped light steel keels. The light steel keel includes a plate-shaped first steel plate 15, the top of the first steel plate 15 is connected with a second steel plate 13, and the bottom of the first steel plate 15 A third steel plate 14 is connected; at least the second steel plate is buried in the concrete rib 3, and at least two third steel plates are buried in the concrete bottom plate 2; two light steel keels are mirrored, and the first steel plate has left and right through holes , take the hole on the light steel keel on the left as the first opening, and the hole on the light steel keel on the right as the second opening 16 .

In the above two construction methods, the structure of the stiffener may also include: left rib 4 and right rib 5 . Both the left rib 4 and the right rib 5 are the first steel bars in a triangular wave shape, and the two first steel bars are mirrored. The space between them is used as the first opening, and the space between the crest and trough of the first steel bar on the right side is used as the second opening; the peaks of at least two first steel bars are embedded in the concrete rib 3, and at least two The trough of the first steel bar is embedded in the concrete base plate 2 .

In the above two construction methods, the angle steel formwork may or may not be removed. The structure of the angle steel formwork is as follows: the angle steel formwork is composed of a vertical plate 7 in the vertical direction and a horizontal plate 8 in the horizontal direction, in an "L" shape; there are two angle steel formworks, namely the left angle steel formwork 10 and the right Side angle steel formwork 11; the horizontal plate 8 of the left angle steel formwork has a first gap for inserting the first connecting column, and the horizontal plate 8 of the right angle steel formwork 11 has a second gap 12 for inserting the second connecting column .

In the above two construction methods, the horizontal plates 8 of the two angle steel formworks are pressed together, and the end surfaces of the horizontal plates 8 away from the vertical plates 7 may be pressed together. It can also be that the lower end surface of the transverse plate 8 of one of the angle steel formworks is against the upper end surface of the transverse plate 8 of the other angle iron formwork. At this time, the lower end faces of the angle steel formwork are partially overlapped. In addition to supporting the concrete that forms the concrete rib 3, the angle steel formwork also functions to limit the position of the reinforcing rib, so the present invention allows a gap between the tops of the left rib 4 and the right rib 5 to facilitate pipelines Put it into the first opening and the second opening from the top of the reinforcing rib. At this time, it is preferable that there are gaps communicating with the outside world above the first opening and the second opening. At this time, when the stiffener is a light steel keel, the gap runs through the second steel plate. When the stiffener is the first steel bar, as long as the two crests are not connected, a gap will naturally be formed. Of course, because of the existence of the first opening and the second opening, it is also possible to use the way that the pipeline passes through the opening from one side. At this time, the top of the two first steel bars can be provided with a straight steel bar, that is, the first steel bar The crests of each wave are connected to a third steel bar in a straight line. During construction, the third steel bar is preferably welded to the first steel bar during the step of making the concrete rib 3 . As for whether to weld the third steel bar first or place the angle steel formwork first, this is not required, because the optimized angle steel formwork of the present invention is not affected by whether there is a third steel bar at the peak of the first steel bar.

In the above two construction methods, the present invention limits the distance between the left rib 4 and the right rib 5 to gradually increase from the concrete rib 3 to the concrete floor 2, so it is allowed to control the insertion of the stiffener into the angle steel formwork through the depth of the gap 9 The depth inside can also be connected with the support leg at the bottom of the horizontal plate 8 of the angle steel formwork, and adjust the depth that the first steel bar is inserted into the angle steel formwork by adjusting the height of the support leg. In the case that the end faces of the horizontal plates 8 of the two angle steel formworks are abutted against the vertical plate 7 , it is preferable that the bottoms of the horizontal plates 8 of the two angle steel formworks are respectively connected with supporting legs. When the lower end face of the cross plate 8 of one of the angle steel formworks is against the upper end face of the cross plate 8 of the other angle steel formwork, the lower end face of the cross plate 8 of the angle steel formwork above can not be provided with supporting legs, only at the Support legs are established on the lower end surface of the transverse plate 8 of that angle steel formwork below. Further preferably, the width of the transverse plate 8 of one of the angle steel formworks is not less than the width of the concrete rib 3, with this angle steel formwork as the lower formwork, the width of the transverse plate 8 of another angle steel formwork is not greater than two times the width of the concrete rib 3 One-third, with the angle steel formwork as the upper formwork, at least four corners of the horizontal plate 8 of the lower formwork are respectively provided with a supporting leg extending downward. The cross plate 8 of the upper formwork sits on the cross plate 8 of the lower formwork. The upper formwork may be provided with a strip-shaped guide protrusion extending downward at a position facing the notch, and the strip-shaped guide protrusion is inserted into the notch of the lower formwork. In this way, the upper formwork is guided to move on the lower formwork, so that the gap alignment of the two angle steel formworks is more accurate.

The structure of the composite floor slab obtained by the above two construction methods is:

The composite floor slab includes a concrete base plate 2, a concrete rib 3, and stiffeners; the stiffeners include a left rib 4 on the left side and a right rib 5 on the right side. The rib 5 is provided with a left and right second opening; the part between the two adjacent first openings of the left rib 4 is used as the first connecting column, and the right rib 5 is located between the adjacent two second openings. The part between the holes is used as the second connecting column; the tops of the left rib 4 and the right rib 5 are inserted into the concrete rib 3, and the bottoms of the left rib 4 and the right rib 5 are inserted into the concrete bottom plate 2; the left rib 4 and the right rib The distance between 5 gradually increases from the concrete rib 3 to the concrete floor 2; there is a gap between the concrete floor 2 and the concrete rib 3, so that the first opening and the second opening are partially or completely leaked . The shape of the leakage part of the first opening and the second opening is preferably a triangle, an isosceles trapezoid, or the like.

The composite floor slab can also be a concrete top slab 1, and the concrete top slab 1 is connected to the concrete rib 3. Yes, the lower end surface of the concrete roof 1 is provided with a groove opening downward, and the concrete rib 3 is inserted into the groove. It is also possible that the concrete roof 1 is provided with a stepped structure near the edge, and the concrete roof 1 sits on the concrete rib 3 using the stepped structure. Under this structure, it is convenient to dismantle the concrete roof 1 in the later stage and maintain the pipelines under it.

The composite floor slab may also include a functional layer, and the functional material is filled between the concrete top slab 1 and the concrete bottom slab 2, and the layer where the functional material is located is used as the functional layer. Pipelines are embedded in the functional layer, and the pipelines pass through at least one first opening or one second opening.

There is a first angle between the second steel plate and the first steel plate, and the first angle is not 180 degrees; there is a second angle between the third steel plate and the first steel plate, and the second angle is not 180 degrees. Preferably, both the first included angle and the second included angle are 90 degrees. Yes, both the second steel plate and the third steel plate are located inside the stiffener. It is also possible that both the second steel plate and the third steel plate are located on the outer side of the stiffener. Regardless of whether it is inside or outside, preferably, the upper end surface of the second steel plate is flush with the upper end surface of the concrete rib, and the lower end surface of the second steel plate is flush with the lower end surface of the concrete rib. The upper end surface of the third steel plate is flush with the upper end surface of the concrete bottom plate 2 , and the lower end surface of the third steel plate is flush with the lower end surface of the concrete bottom plate 2 .

The junction of the third steel plate and the first steel plate is preferably provided with an opening for suspension, and the second steel bar 6 is also preferably provided with an opening for suspension. Suspension bolts are inserted into the openings for suspension, and the tops of the suspension bolts leak outside the concrete base plate 2 . Thereby utilize suspension bolt, the present invention is hoisted to designated position.

There is a third included angle between the first steel bar, the first steel plate and the concrete floor 2, and the third included angle is preferably 60 degrees.

The concrete base plate 2 may be a base plate formed by prefabricated concrete, especially a UHPC base plate made of UHPC ultra-high performance concrete. When it is a UHPC bottom plate, the strength of the bottom plate is relatively high, and no steel bars can be placed in the bottom plate, and only steel wire mesh is laid. The thicknesses of the concrete top plate 1 and the concrete bottom plate 2 are both preferably 15-50mm. Both sides of the concrete base plate 2 are provided with chamfers. The chamfer is located at the intersection of the upper end surface and the side end surface of the concrete bottom plate 2 . The side end faces here are two side end faces parallel to the extending direction of the concrete stiffener.

A steel wire mesh panel can be embedded in the concrete base plate 2, and the steel wire mesh panel is preferably located under the stiffener, and the stiffener can be connected to the steel wire mesh panel by binding steel bars.

The concrete bottom slab 2 can be embedded with transverse reinforcement and longitudinal reinforcement, the longitudinal reinforcement is preferably located below the stiffener, and the stiffener is welded on the longitudinal reinforcement. For the first steel bar, under this structure, the second steel bar 6 can be replaced by a longitudinal steel bar, so that there is no need to set up another second steel bar.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A composite floor slab comprises a concrete bottom plate, a concrete rib plate and a stiffening rib; the stiffening rib comprises a left rib positioned on the left side and a right rib positioned on the right side, wherein a first opening penetrating through the left rib from side to side is formed in the left rib, and a second opening penetrating through the right rib from side to side is formed in the right rib;

the part of the left rib between two adjacent first openings is used as a first connecting column, and the part of the right rib between two adjacent second openings is used as a second connecting column;

the top of the left rib and the right rib are inserted into the concrete rib plate, and the bottom of the left rib and the right rib are inserted into the concrete bottom plate;

the distance between the left rib and the right rib is gradually increased from the concrete rib plate to the concrete bottom plate;

and a gap is formed between the concrete bottom plate and the concrete rib plate, so that the first opening and the second opening are partially or completely leaked.

2. The composite floor slab according to claim 1, wherein the left rib and the right rib are both "U" -shaped light steel joists, each light steel joists comprises a first steel plate in a plate shape, the top end of the first steel plate is connected with a second steel plate, and the bottom end of the first steel plate is connected with a third steel plate;

at least the second steel plate is embedded in the concrete rib plate, and at least two third steel plates are embedded in the concrete bottom plate;

two light gauge steel mirror image settings, open the hole that runs through about having on the first steel sheet to the hole that is located left light gauge steel is as first trompil, regards as the second trompil with the hole that is located the light gauge steel on right side.

3. The composite floor slab as claimed in claim 1, wherein the left rib and the right rib are first reinforcing bars in a triangular wave shape, the two first reinforcing bars are arranged in a mirror image manner, peaks of the two first reinforcing bars are butted and then welded together, a space between the peak and the trough of the first reinforcing bar on the left side is used as a first opening, and a space between the peak and the trough of the first reinforcing bar on the right side is used as a second opening;

wave crests of at least two first reinforcing steel bars are embedded in the concrete rib plate, and wave troughs of at least two first reinforcing steel bars are embedded in the concrete bottom plate.

4. The composite floor slab according to claim 1, further comprising an angle iron formwork in an "L" shape, the angle iron formwork being composed of a vertical plate in a vertical direction and a horizontal plate in a horizontal direction;

the two angle steel templates are respectively a left side angle steel template and a right side angle steel template;

the cross plate of the left side angle iron template is provided with a first notch for inserting the first connecting column, and the cross plate of the right side angle iron template is provided with a second notch for inserting the second connecting column.

5. A composite floor slab as claimed in claim 1, further comprising a concrete top slab connected to the concrete rib slab.

6. The composite floor slab according to claim 5, further comprising a functional layer, wherein a functional material is filled between the concrete top slab and the concrete bottom slab, and the layer where the functional material is located is used as the functional layer;

and a pipeline is embedded in the functional layer and penetrates through at least one first opening or one second opening.

7. A construction method of a composite floor slab is characterized in that,

manufacturing a concrete bottom plate with stiffening ribs: inserting the bottom of the stiffening rib into a mould for manufacturing a concrete bottom plate, pouring concrete into the mould, and removing the mould after the concrete is solidified to obtain the concrete bottom plate with the stiffening rib;

step two, laying pipelines: transporting the concrete bottom plate with the stiffening ribs to a construction site, hoisting the concrete bottom plate to a specified position, and placing the pipeline between two adjacent wave troughs of the first reinforcing steel bars;

step three, manufacturing a concrete rib plate: inserting a first connecting column from the left side of stiffening rib to the right with left side angle steel template, inserting a second connecting column from the right side of stiffening rib to the left with right side angle steel template, inserting to the diaphragm of two angle steel templates and offset together, at this moment, left side angle steel template with right side angle steel template forms the filling tank that the opening is up, and to pouring concrete in the filling tank, treat that the concrete solidifies the back, obtain the concrete rib board.

8. Another construction method of the composite floor slab is characterized in that,

manufacturing a concrete bottom plate with stiffening ribs: inserting the bottom of the stiffening rib into a mould for manufacturing the concrete bottom plate, pouring concrete into the mould, and removing the mould after the concrete is solidified to obtain the concrete bottom plate with the stiffening rib;

step two, manufacturing a concrete rib plate: in a precast yard or a construction site, inserting a first connecting column into a left angle steel template from the left side of a stiffening rib to the right, inserting a second connecting column into a right angle steel template from the right side of the stiffening rib to the left, and abutting against transverse plates of two angle steel templates, wherein at the moment, the left angle steel template and the right angle steel template form a pouring groove with an upward opening, pouring concrete into the pouring groove, and obtaining a concrete rib plate after the concrete is solidified, thereby forming a composite plate with the stiffening rib;

step three, laying a pipeline: after the composite board with the stiffening ribs is hoisted to the designated position, the pipeline is arranged in a gap formed by the first reinforcing steel bars, the concrete bottom plate and the concrete rib plate in a penetrating mode.

9. The construction method of a composite floor slab as claimed in claim 7 or 8, further comprising the fourth step of filling the bottom seams: the gap between two adjacent concrete floors is filled with a caulking material.

10. The method of constructing a composite floor slab as claimed in claim 9, further comprising the steps of placing a concrete top slab: the concrete top plate is attached to the concrete rib plate.

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