CN115217254A - Demolition-free steel truss floor deck, formwork, and manufacturing method of floor deck - Google Patents

Abstract

The invention relates to the technical field of reinforced truss floor decks, in particular to a method for manufacturing a reinforced truss floor deck and a template without dismantling. A manufacturing method of a reinforced truss floor deck without dismantling. A dismantling-free steel bar truss floor deck comprises a formwork, the formwork comprises a bottom plate and a metal connecting plate fixed on the bottom plate, the connecting plate comprises a connecting part exposing the upper side of the bottom plate and an anchoring part located inside the bottom plate, the The anchoring portion is inserted into the bottom plate when the bottom plate is not hardened, and is fixed to the bottom plate after the bottom plate is hardened, and the connecting portion is welded and connected with several parallel steel bar trusses. The connecting plate and the bottom plate are connected by anchors located inside the bottom plate, which overcomes the existing technical problems and existing technical prejudices of connecting the two through fasteners, so that the two are firmly connected and durable. The reinforcement of the bottom plate increases the toughness, strength and other properties of the bottom plate itself, and does not damage the structure of the bottom plate by drilling additional holes.

Description

Demolition-free steel truss floor deck, formwork, and manufacturing method of floor deck

technical field

The invention relates to the technical field of reinforced truss floor decks, in particular to a dismantling-free reinforced truss floor deck, a template, and a manufacturing method for a floor deck.

Background technique

At present, there are two commonly used production forms of floor slabs in the construction field, one is prefabricated floor slabs, and the other is cast-in-place concrete floor slabs. Prefabricated floor slabs are made in factories or prefabricated sites on construction sites through molds, cured and solidified. Then it is installed by on-site hoisting. Although the manufacturing cost of the prefabricated floor slab is reduced, the installation cost of the prefabricated floor slab is high, and at the same time, it lacks an effective connection with the wall, which is easy to loosen and fall off, and has poor seismic performance. . The cast-in-place concrete floor is now commonly used as a reinforced truss floor slab, which combines the reinforced truss and the floor slab to reduce the support structure. The existing combination of reinforced truss and floor deck includes non-removable and prefabricated. The non-removable reinforced truss floor deck is welded and connected to the profiled galvanized sheet through the web bars of the reinforced truss. , The galvanized sheet is permanently left on the floor slab. Although the use cost of this type of floor deck is low, the tinplate cannot be removed and is easily deformed when pouring concrete, making the decoration at the bottom of the floor more difficult and time-consuming. It is easy to rust, and the decoration industry part is easy to fall off. For this problem, the prefabricated steel truss floor deck is assembled by using wooden boards such as bamboo plywood as the bottom formwork and the steel truss is detachably connected and assembled by fasteners. After the cast-in-place concrete is solidified, the bottom formwork is removed and reused. It is flat and avoids the difficulty of assembling and decorating the floor panel, but it is also time-consuming and laborious to remove the bottom formwork, and the bamboo plywood is easily damaged in the harsh environment of the construction site, and the use cost is high.

Therefore, there is an urgent need in the art for a non-demolition floor deck that can solve the above problems. In this regard, the Chinese Patent Publication No. CN111535488A, titled "Prefabricated prefabricated reinforced truss-free floor deck and cast-in-place support-free truss floor", discloses a demolition-free floor deck, including prefabricated cement fiber boards. Self-tapping screws fix the steel plate member on the surface of the cement fiber board. The upper surface of the steel plate member is welded with several steel support members evenly distributed along its length direction. , and then the upper or lower steel bars are welded to the steel bar truss. This kind of non-demolition floor bearing plate is particularly welded, and it is not on the same level, the manufacturing is relatively complicated, and the amount of steel bars is large, and the weight of the plate per unit area is large, which is inconvenient for installation. In addition, it is time-consuming and laborious to connect the cement limit plate and the steel plate member through the fasteners, and the connection between the fasteners and the cement fiber board is prone to stress concentration, which causes the cracking of the cement fiber board, and even falls off when the concrete is poured.

The Chinese Patent Publication No. CN111663696A, titled "A self-supporting self-supporting prefabricated rib beam concrete hollow composite board without support", discloses a composite board, which includes a prefabricated cement fiber board. The connection plate is connected with the prefabricated rib plate, and a hollow body is arranged between the two prefabricated rib plates. Although the floor deck solves the above-mentioned problem of "there are too many weldings, and they are not on the same level", there is a need for a negative electrode to be installed on each connecting plate when the prefabricated rib plate and the spaced connecting plates are welded, and the welding process is relatively complicated. It is not suitable for automated (high automation cost) production. The connecting plate is connected to the prefabricated cement fiber board through self-tapping screws, which requires a large thickness and rigidity of the laminated board. Therefore, such a laminated board has a large thickness and high cost, and it is not easy to assemble. It is easy to loosen and fall off. The cement fiber board is also stress-concentrated and easily damaged by self-tapping screws.

The above-mentioned non-demolition floor decks all exist. The welding process of steel trusses and connecting plates (steel plate members) is complicated, and the processing cost is high. After the cement board is hardened, it can only be matched with fasteners through self-tapping screws or through holes. (Steel plate member) fixed connection, the connection processing is time-consuming and labor-intensive, and the stability and durability cannot be guaranteed. At the same time, the connection between the fastener and the cement fiber board is prone to stress concentration, resulting in cracking of the cement fiber board, and even falling off when the concrete is poured. risk.

SUMMARY OF THE INVENTION

In view of at least one of the technical problems existing in the above-mentioned prior art, the present invention provides a dismantling-free steel truss floor deck, which is not only light in weight and can be paved by two workers, but also easy to assemble. The process is simple, the connection between the floor deck and the steel truss is stable, durable, and there is no risk of falling off.

The invention also provides a method for manufacturing a formwork used for a reinforced truss floor deck without dismantling.

The present invention also provides a method for manufacturing a steel truss floor deck without dismantling

The above method makes the manufacturing process of the template and the floor deck simple, and can reduce the manufacturing cost.

According to the present invention, a dismantling-free steel truss floor slab is provided, which includes a formwork, the formwork comprises a base plate and a metal connecting plate fixed on the base plate, the connecting plate includes a connecting portion exposing the upper side of the base plate and a connecting portion located inside the base plate. An anchoring part, the anchoring part is inserted into the bottom plate when the bottom plate is not hardened, and is fixed to the bottom plate after the bottom plate is hardened, and the connecting part is welded and connected with several parallel steel bar trusses. The template of the present invention connects the bottom plate and the connecting plate through the anchors located inside the bottom plate, which overcomes the existing technical problems and existing technical prejudices of connecting the two by means of fasteners, so that the two are firmly connected, durable, and anchored. The part itself can be used as a reinforcement of the bottom plate to increase the toughness, strength and other properties of the bottom plate itself, and it will not damage the structure of the bottom plate by drilling additional holes. The connecting plate is integrally connected to conduct electricity, and is welded and connected to the steel truss in the same welding layer, which is convenient for welding and simple in welding process, and is suitable for automatic welding equipment.

Further, the connecting plates are several strips that are spaced in parallel and run through the length direction of the bottom plate or cover the upper side of the bottom plate as an integral plate.

The connecting plate can be intermittently divided into several strips parallel to the steel truss. The connecting plate can be set more flexibly. Profiles such as C-shaped steel can be used to increase the structural strength of the bottom plate in the length direction, and the welding with the steel truss is also convenient. However, when the connecting plate is a thin plate that is fully and continuously covered on the bottom plate, the bottom plate is laid and pressed as a whole, the process is relatively simple, and the connecting plate can enhance the toughness of the bottom plate and the connection is firm.

Further, the anchoring portion is a portion of the connecting plate that is turned toward the bottom plate or a portion that is bent and extended toward the bottom plate, and is integrally formed with the connecting plate.

The plate-shaped anchoring portion formed by the downward folding of the connecting plate forms the wing plate of the connecting plate on the structure, which enhances the overall bending resistance and greatly improves the structural strength of the formwork. Bending or stamping has low cost and high efficiency.

Further, the anchoring portion is distributed with several holes.

The hole structure is arranged in the anchoring part, the connection plate and the bottom plate are more closely connected, and the bottom plate can flow into the hole structure before hardening, which not only increases the connection strength, but also reduces the possible gap between the connection plate and the bottom plate.

Further, the connecting plate is evenly distributed with anchoring holes, and the periphery of the anchoring hole is the anchoring portion formed by folding the connecting plate downward.

The anchoring part formed by folding down the plate around the anchoring hole can save materials and reduce the processing cost. For the requirements of light and high strength for the floor bearing plate, the connecting plate and the bottom plate are made of thin plates, and the connection is tight. 0.5mm, when the bottom plate thickness is 8mm.

Further, the anchoring portion is fan-shaped with sharp corners, the edges are serrated, and the sharp corners are inserted into the bottom plate. It is convenient for the anchoring part to be inserted into the slab of the bottom plate, and the contact area is increased, so that the connection plate and the bottom plate are connected more firmly.

Further, the anchoring portion is a protruding column formed by welding the lower side of the connecting plate to connect the anchoring steel bars or punching down the connecting plate, and the anchoring portion is bent to form an anchoring foot.

The anchoring part formed by the welding of the anchoring steel bars has high strength and is suitable for large-scale prefabricated bottom plate structures; while the convex columns formed by stamping are more suitable for the connection of thin connecting plates and thin bottom plates, and the connection is tight. For example, the thickness of the connecting plate is 0.5mm and the thickness of the bottom plate When it is 8mm, and the groove formed by stamping is more closely combined with the cast-in-place concrete, there is no delamination of the floor slab after pouring. The anchoring feet can hold the bottom plate firmly, so that the connection between the anchoring part and the bottom plate is firmer.

Further, the connecting board is a profiled board, and the bottom plate is a cement board, a cement fiber board, a thermal insulation board or a decorative board.

The profiled board can increase the overall structural strength of the floor deck, while the cement board, cement fiber board, thermal insulation board or decorative board is thinner, and it is integrated with the floor after pouring the concrete, which is very convenient for the decoration of the house floor, even without the need for furnish.

Further, the thickness of the connecting plate is 0.3-1 mm, the connecting portion is 0-5 mm higher than the upper side of the bottom plate, the anchoring portion is 0.5-5 mm from the lower side of the bottom plate, and the anchoring portions are evenly distributed, and each square meter is greater than or equal to 100.

The thickness of the connecting plate is 0.3-1mm, the template is lighter and thinner, and the material is saved, and the plasticity of the metal sheet in this range is stronger, which is convenient for stamping, pressing and other processes, so that the connecting part and the bottom plate are integrated and exposed. On the top of the floor, it is convenient to connect with the steel truss, and the anchoring part is 0.5-5mm away from the lower side of the bottom plate. The bottom plate can not only grasp the anchoring part more firmly, but also protect the anchoring part from the influence of the environment, and the anchoring part is evenly distributed. . When the number of anchoring parts per square meter is greater than or equal to 100, the bottom plate and the connecting plate can have strong connection strength, and the anchoring part can be set smaller, so that the connecting plate can not only increase the overall strength of the bottom plate, but also ensure the connecting strength. The possibility of the bottom plate falling off is avoided, and the manufacturing cost of the small and dense connecting portion is relatively economical.

Further, the truss is a steel bar truss, including upper chord steel bars, lower chord steel bars and web bars connecting the upper chord bars and lower chord bars, and the web bars are welded and connected to the connecting plate.

The web bar is connected to the connecting plate, and the distance between the bottom chord bar and the connecting plate can be controlled and adjusted through the setting of the web bar structure, so that the bottom chord bar can achieve the best effect of being wrapped and grasped by concrete, and the bottom chord bar can be effectively used. In addition, the web bars have multiple connection points that are in contact with the connecting plates. The web bars have low rigidity and high elasticity, which avoids the damage to the welding points by impact, and makes the connection between the steel truss and the connecting plates more stable.

Further, the web bars are connected with the lower chord bars and then folded outward to form connecting legs, and the connecting legs are connected with the connecting portion by welding.

The connection feet make the contact area of the welding connection larger, the connection strength is higher, the action area is large, and the force concentration is avoided. The parallel arrangement of the connecting pin and the connecting part is more suitable for the welding process of resistance spot welding.

Further, the connecting feet are evenly distributed on both sides of the steel bar truss, the connecting feet are substantially parallel to the connecting portion and are connected by resistance spot welding, and the two ends of the steel bar truss respectively protrude from the bottom plate for supporting on the building.

The parallel arrangement of the connecting feet facilitates the automatic welding of the connecting feet, and the resistance spot welding is suitable for the automatic welding of the metal connecting plate attached to the hard bottom plate of this patent, and the welding efficiency is high, and the welding point is stable and less defects.

Further, it also includes support members distributed at intervals on both sides above the formwork, the support members are fixedly connected with the formwork and protrude from the sides of the formwork, and can be in contact with the adjacent formwork.

Arranging a support above the floor deck can avoid or reduce the dislocation of the splicing gap of the cement fiber board. At the same time, the use of the support can also increase the horizontal connection strength of the floor deck, so that the floor deck on the opening is connected into a whole, and the overall stability of the floor deck is increased. Moreover, after the concrete is poured, the cement fiber board and the cast-in-place concrete are combined more closely or even merged together through the setting of the support and the properties of the floor deck itself.

Further, the support piece is a metal plate piece, welded above the edge of the connecting plate, the support piece protrudes from the edge of the connecting board and can abut against the upper surface of the connecting board of the adjacent floor slab, or the support piece abuts or Welded connection, the supports on both sides of the formwork staggered out of the sides of the corresponding formwork.

A support is arranged on the edge of the formwork. For the position where the splicing seam is dislocated, the support can be mutually supported or welded with the adjacent floor slab to reduce the dislocation of the splicing seam. The support can be welded by resistance spot welding, etc. The welding method is connected to the thin plate by welding, and the welding can be completed in the factory, which is convenient for mechanized operation.

The present invention also provides a method for making a template, comprising the following steps:

Step 1: Make the slab of the bottom plate: mix cement, cellulose and water evenly and spread it into a slab;

Step 2 Lay the connecting plate: The connecting plate is punched out or welded to form the anchoring part, and then the connecting plate is laid on the surface of the slab, the connecting part of the connecting plate faces the same side of the slab, the anchoring part is immersed in the slab, and the slab and the connecting plate are connected. Pressed and fixed, and pressed into the required density and thickness of the bottom plate;

Step 3 Forming: After pressing, place the plate so that the plate blank is solidified and hardened into a plate;

Step 4 Assembling: Cut the formed plate into the required size, or lay the slab in a mold of a certain size in step 1 to form a slab of the required size.

The present invention also provides a method for manufacturing a reinforced truss floor deck without dismantling, comprising the following steps:

16. a method for manufacturing a reinforced truss floor deck without dismantling, is characterized in that,

Step 1: Make the slab of the bottom plate: mix cement, cellulose and water evenly and spread it into a slab;

Step 2 Lay the connecting plate: Lay the connecting plate on the surface of the slab, the connecting plate is provided with an anchoring part and a connecting part, the connecting part faces the same side of the slab, the anchoring part sinks into the slab, and the slab and the connecting plate are pressed and fixed, And pressed into the required density and thickness of the bottom plate;

Step 3 Forming: After pressing, place the plate so that the plate blank is solidified and hardened into a plate;

Step 4 Assembly: Cut the formed plate to the required size, lay the steel truss parallel on one side of the connecting plate, and fix the steel truss and connecting plate by welding;

The cutting of the plate in step 5 into the required size can also be completed in step 1, that is, the slab is laid in a mold of a certain size to form a slab of the required size; in step 2, when the connecting plate is fixed, the connecting part is exposed on the surface of the slab , or the connecting portion is buried in the slab, the upper surface of the plate formed in step 3 is partially removed by machining, so that the connecting portion is exposed. The connecting plate is connected with the blank of the bottom plate, so after the bottom plate is solidified, the connection between the bottom plate and the connecting plate is very firm, even integrated, avoiding the process of connecting by fasteners such as screws, reducing the possibility of damage to the bottom plate, and the cost of processing and assembling Low.

Although the welding and fixing method of the steel truss and the connecting plate is basically the same as the welding method of the existing steel truss floor deck, but the hard cement fiber board is welded and connected to the steel truss by setting metal connectors, and the fast state matching is achieved. Some cement fiber boards have never tried fixing methods, breaking the technical prejudice that cement fiber boards and steel trusses can only be connected by screws, fasteners, etc. This patent greatly improves the application of mechanized assembly, and has high assembly efficiency and assembly stability. sex.

Description of drawings

Figure 1 is a top view of a template structure;

Fig. 2 is the sectional view of the A-A direction in Fig. 1;

Fig. 3 is a kind of top-view structural schematic diagram of a reinforced truss floor deck without dismantling;

Fig. 4 is the sectional view of the B-B direction in Fig. 3;

Fig. 5 is another top-view structural schematic diagram of a reinforced truss floor deck without dismantling;

Fig. 6 is the sectional view of the D-D direction in Fig. 5;

Fig. 7 is another kind of template structure top view;

Fig. 8 is the sectional view of the C-C direction in Fig. 7;

Fig. 9 is the sectional view of the C-C direction of another kind of template structure of Fig. 7;

Fig. 10 is another kind of top-view structural schematic diagram of a reinforced truss floor deck without dismantling;

Fig. 11 is a sectional structural schematic diagram of a kind of dismantling-free steel truss floor deck shown in Fig. 10;

Figure 12 is a schematic diagram of the structure of a connecting plate;

FIG. 13 is a schematic diagram of another connecting plate structure.

The figure is marked as:

10-template, 1-bottom plate, 2-connecting plate (originally a connector), 21-connecting part, 22-anchoring part, 221-anchoring foot, 23-hole, 24-anchoring hole, 31-reinforced truss, 311- Top chord bar, 312-web bar bar, 3121-connecting foot, 313-bottom chord bar, 314-support bar, 322-wing plate, 5-support.

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and not for limiting.

As shown in Figures 3, 5, and 10, the present invention provides a dismantling-free steel truss floor deck, including a template 10. The template 10 includes a bottom plate 1 and a connecting plate 2, and the template 10 and the steel truss 31 are welded and connected. The bottom plate 1 can be a cement board, a cement fiber board, a thermal insulation board or a decorative board, which is a fluid or volatile building material before molding, and becomes hard and shaped after curing. Of course, including wood panels formed by powder processing. Taking cement fiber board as an example, cement fiber board is also called fiber cement board. It is a kind of building material made of siliceous and calcareous materials as main raw materials and adding plant fibers, which is the prior art. It can be "a kind of cement fiber board" disclosed by Chinese patent publication number CN111320426A, "a kind of high toughness wear-resistant cement fiber board" disclosed by publication number CN109704692A, and "a new type of coating cement fiber board" disclosed by CN103480554A, etc.

As shown in Figures 1 and 7, the connecting plate 2 and the cement fiber board are connected and fixed during or after the manufacture of the cement fiber board, including integral casting, pressing or fitting and fixing. Fixed connection with cement fiberboard. At least a part of the connecting board 2 is recessed inside the cement fiber board so that the connecting board 2 and the cement fiber board are fixedly connected. The connecting board 2 has a connecting portion 21 exposed on one side of the cement fiber board. The connecting plate 2 and the cement fiber board are anchored by pre-embedding. The fixation is formed in the manufacturing process of the cement fiber board. This kind of fixation is very firm and stable. Even if it encounters a harsh environment, it will not be damaged. Reduced, high rigidity, and strong stability and durability. At the same time, by exposing the connecting portion 21 on the surface of the cement fiber board, the welding connection with the steel truss, profiles, etc. can be very convenient, and it is convenient to manufacture the steel truss floor deck.

In the prior art, a cement fiber board method, such as the manufacturing method of the cement fiber board disclosed in publication number CN109704692A. The connecting plate 2 and the cement fiber board can be integrally pressed and formed, and the connecting plate 2 is made of metal. The connecting piece 2 and the cement fiber board are formed by pressing, with tight texture and high rigidity, and can be used as a permanent structure of the floor slab. The connecting plate 2 is parallel to one side of the cement fiber board, as shown in FIG. In this way, one side of the formwork 10 is covered with a metal connecting plate 1, and one side is exposed as a base plate 1. One side of the formwork 10 is covered with the cast-in-place concrete structure, and the other side is the bottom surface of the floor slab. Therefore, the decoration of the bottom surface of the floor is very convenient, and even no further decoration is required. As shown in FIG. 5 , the connecting plates 2 are arranged at intervals on the template 10 , and this arrangement can reduce the deflection and deformation of the template 10 in the longitudinal direction. Of course, as shown in FIG. 9, an embodiment of the connecting plate 2, the connecting plate 2 is a profiled plate or a specially-made plate, and only the plate at the connection with the steel truss is provided with a profiled protrusion or thickening, so that both The material of the connecting plate 2 can be saved, and the welding process requirements can be reduced when the anchoring part 22 is arranged and the web steel bar 312 is connected, and the overall rigidity of the laid floor deck can be enhanced in cooperation with the steel truss, and the deformation can be reduced.

As shown in Figs. 2, 8-9, 11-12, the connecting plate 2 includes an anchoring portion 22 extending in the opposite direction to the connecting portion 21 and located inside the cement fiber board. The anchoring portion 22 may be a portion of the connecting plate 2 that is punched and turned toward the bottom plate 1 or a portion that is bent and extended toward the bottom plate 1 , and is integrally formed with the connecting plate 2 . In some embodiments, the anchoring portion 22 can also be the lower side of the connecting plate 2 welded to connect the anchoring steel bars or the protruding column 222 protruding from the lower side of the connecting plate 2 . When the connecting plate is punched downward, a convex column is formed, and an anchor portion can be formed without forming a through hole by punching.

The anchor portion 22 is most simply formed by mechanical punching to form a punched edge folded down, and at the same time, a punched groove or an anchoring hole 24 is formed. The plate around the anchor hole 24 is folded downward to form the anchor portion 22 , which can save material and reduce the processing cost. The anchoring portion 22 is fan-shaped with sharp corners, the edges are serrated, and the sharp corners are inserted into the bottom plate 1 . The anchoring portion 22 has sharp corners to make it easier to insert the anchoring portion 22 into the slab of the bottom plate, and the serrated structure further facilitates the insertion of the anchoring portion 22, and also increases the contact area with the bottom plate and increases the firmness of the connection. Of course, another embodiment is that only through holes are formed by punching, and another anchoring portion 22 is provided, such as a cylindrical barrel with an outward flange at the end, etc., the connecting plate 2 and the bottom plate 1 can be inserted into the anchoring hole 24. The connection strength is greater. Of course, the structure and shape of the anchoring portion 22 are more flexible, and the laying of the connecting plate is also more convenient. At the same time, the problem of connection strength between the anchoring portion and the connecting plate can be solved.

When the anchoring portion 22 is a plate-like structure, it can be used as wings on both sides of the connecting piece 2 to increase the bending resistance of the connecting piece structurally. When the anchoring portion 22 has a plate-like structure, the flow of the material of the bottom plate can be reduced by disposing a plurality of holes 23 evenly distributed.

The anchoring portion 22 includes an anchoring leg 221 that is bent to the left or/and to the right in the length direction of the connecting plate 2 . The connecting portion 21 is 1-5 mm higher than the side surface of the cement fiber board, and the anchoring feet 221 are 1-5 mm away from the lower side surface of the fiber cement board 1 . The anchoring part 22 can be connected with the connecting plate 2 by welding, fastener connection, riveting, etc. Of course, it can also be an integrally formed part, which is the downward punching part of the connecting plate 2, etc. The function of the anchoring part 22 is to increase the connecting part 2 and the cement fiber board. The contact area or coefficient of friction can make the connection between the connector 2 and the cement fiber board more firm, and setting the bent anchoring feet 221 can increase the anchoring area with the cement fiber board.

In order to increase the fluidity of the blank when pressing the cement fiber board blank and avoid problems such as uncompacted compaction and voids, several holes 23 are arranged in the connecting part and/or the anchoring part, and the arrangement of the through holes minimizes the impact on the structural strength. Impact. Generally, the thickness of the connecting board is 0.3-1 mm, and the thickness of the cement fiber board is 5-15 mm, preferably 6-8 mm. The width of the floor deck is 1100mm~1300mm, and the length is 2200-2600mm. The commonly used width is 1200mm and the length is 2400mm. Every two connecting boards with an interval of 100-80mm is a combination, and the distance between each combination is 150-100mm, or the connecting boards are laid as a whole and fully cover the bottom plate. If it is not laid, it is a normal process requirement.

As shown in Figures 3-6 and 10-11, the connection between the bottom plate 1 and the steel bar truss 31 is realized by the welded connection between the steel bar truss 31 and the connecting plate 2. The steel bar truss 31 can also be replaced by other trusses, such as H-section bar, channel steel and the like. Each steel bar truss 31 includes an upper chord steel bar 311 , a web bar steel bar 312 and two lower chord bars 313 . The lower chord bar 313 or the web bar steel bar 312 is welded to the connecting portion 21 . The web bars 312 are connected with the lower chord bars 313 and then extend and fold outwards to form connecting legs 3121 , and the connecting legs 3121 are connected to the connecting portion 21 by welding. The arrangement of the connection pins 3121 increases the connection area, avoids stress concentration, and the outward turn of the connection pins also leaves room for soldering connections for the soldering equipment. The connecting feet 3121 are evenly spaced on both sides of the steel bar truss 3, and the connecting feet 3121 are substantially parallel to the connecting portion 21 and are connected by resistance spot welding.

Through resistance spot welding, multiple welding spots can be quickly welded, the welding is firm, automation can be realized, and labor costs are low.

The connecting feet 3121 are evenly distributed on both sides of the steel truss 3 at intervals. The connecting feet 3121 are basically parallel to the connecting portion 21 and are connected by spot welding. .

In a dismantling-free reinforced truss floor deck, the bottom plate 1 and the reinforced truss 31 are connected by welding connection, and the hard cement fiber board with a metal surface is welded and connected with the reinforced truss, so as to achieve a fast state-of-the-art configuration. The fixed method of the cement fiber board has not been tried before, breaking the technical prejudice that the cement fiber board and the steel truss can only be connected by screws, fasteners, etc. after drilling holes in the cement fiber board, this patent greatly improves the application of mechanized assembly, and has high assembly efficiency and structural stability. In the case of processing cement fiber board without drilling, etc., the setting shape, performance and required thickness of cement fiber board have more flexible options, and while reducing material costs, it can also reduce processing costs.

For some thinner non-detachable reinforced truss floor slabs, in order to avoid problems such as dislocation at the splicing or weak connection, supports 5 distributed at intervals in the length direction of the floor slab are fixedly connected to the formwork. and stick out to one side of the template. Further, the support member 5 is a metal plate member, welded above the edge of the connecting plate 2, and the support member 5 protrudes from the edge of the connecting plate and can be in contact with the upper surface of the connecting plate of the adjacent floor slab, or support pieces against each other, or welded connections. The connection plate 2 can be pre-welded metal thick plates by resistance spot welding, and can be connected by manual welding when laying the floor deck. The welding connection arrangement of the support piece is more convenient and flexible, and the adjacent floor decks are connected as a whole, which can not only reduce the upper and lower dislocations, but also reduce the gap between the adjacent floor decks.

For the support of adjacent sides of the truss floor deck during splicing, the following scheme can also be implemented for the support structure: including grooves and bosses alternately distributed in the length direction of both sides of the floor deck, the bosses are Compatible with the groove structure; slots are distributed at intervals along the length direction of both sides of the floor deck, and a pin is also included, a part of the pin is inserted into the slot to be fixed, and a part of the pin is exposed to the slot of the other floor deck. cooperate and so on.

During the installation and use of the dismantling-free steel truss floor slab of this patent, as shown in Figure 3-6, support bars 314 are arranged at the ends of the steel truss. The part protrudes from the bottom plate, and the support bars are lapped and welded on the steel structural beam. When the free-to-remove reinforced truss floor slab is used in the concrete structure, the end of the reinforced truss can be flush with the end of the bottom plate. The support rib 314 supports the bottom plate of the member, and the bottom plate is placed on the formwork of the wall or beam or on the hardened wall or beam.

In the construction of floor slabs, a reinforced truss floor deck is commonly used. Taking this as an example, a dismantling-free reinforced truss floor deck of the present invention is further introduced.

The present invention also provides a method for making a template, which is specifically as follows:

A method for making a formwork, step 1: making a slab of a bottom plate: stirring cement, cellulose, and water to evenly spread the slab into a slab;

Step 2 Lay the connecting plate: The connecting plate is punched out or welded to form the anchoring part, and then the connecting plate is laid on the surface of the slab, the connecting part of the connecting plate faces the same side of the slab, the anchoring part is immersed in the slab, and the slab and the connecting plate are connected. Pressed and fixed, and pressed into the required density and thickness of the bottom plate;

Step 3 Forming: After pressing, place the plate so that the plate blank is solidified and hardened into a plate;

Step 4 Assembling: Cut the formed plate into the required size, or lay the slab in a mold of a certain size in step 1 to form a slab of the required size.

The present invention also provides a method for manufacturing a reinforced truss floor deck without dismantling, which is specifically as follows:

A method for manufacturing a reinforced truss floor deck without dismantling, the step 1 is to make a slab of a bottom plate: mix cement, cellulose and water to evenly spread the slab into a slab;

Step 2 Lay the connecting plate: Lay the connecting plate on the surface of the slab, the connecting plate is provided with an anchoring part and a connecting part, the connecting part faces the same side of the slab, the anchoring part sinks into the slab, and the slab and the connecting plate are pressed and fixed, And pressed into the required density and thickness of the bottom plate;

Step 3 Forming: After pressing, place the plate so that the plate blank is solidified and hardened into a plate;

Step 4 Assembly: Cut the formed plate to the required size, lay the steel truss parallel on one side of the connecting plate, and fix the steel truss and connecting plate by welding;

The cutting of the plate in step 5 into the required size can also be completed in step 1, that is, the slab is laid in a mold of a certain size to form a slab of the required size; in step 2, when the connecting plate is fixed, the connecting part is exposed on the surface of the slab , or the connecting portion is buried in the slab, the upper surface of the plate formed in step 3 is partially removed by machining, so that the connecting portion is exposed.

The connecting plate can be buried in the bottom plate as a whole, and the connecting part is exposed by machining, which can reduce the uneven deformation of the connecting plate when it is connected with the blank, slip or the connecting plate is torn and other problems, and also avoid the connection. Connection problem between slab and cast-in-place concrete.

The connecting plate and the bottom plate are connected when the bottom plate is a blank, so after the bottom plate is solidified, the connection between the bottom plate and the connecting plate is very firm, even integrated, which avoids the process of connecting by fasteners such as screws, and reduces the possibility of damage to the bottom plate. Low processing and assembly costs. The welding and fixing method of the steel truss and the connecting plate breaks the technical prejudice of the existing technology that the cement fiber board and the steel truss can only be connected by screws, fasteners, etc. This patent greatly improves the application of mechanized assembly, and has high assembly efficiency and Assembly stability.

The setting directions "longitudinal" and "horizontal" in the present invention are two mutually perpendicular directions on the horizontal plane. When a direction extending horizontally is defined as "longitudinal", the corresponding "longitudinal" treatment in the horizontal plane and "longitudinal" is defined. It is "horizontal"; the orientation words "upper" and "lower" described in this application are the "above" and "below" of the product after the product is used and laid in an embodiment of the present invention.

The present invention and its embodiments are described above schematically, and the description is not restrictive. What is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, which shall belong to the protection scope of the present invention. .

Claims (16)

1. The utility model provides a exempt from to tear open steel bar truss floor carrier plate, includes template (10), template (10) include bottom plate (1) and fix metal connecting plate (2) on bottom plate (1), its characterized in that, connecting plate (2) are including exposing connecting portion (21) of bottom plate (1) upper flank and the inside anchor portion (22) that is located bottom plate (1), insert in bottom plate (1) when bottom plate (1) is unhardened anchor portion (22) to it is fixed mutually with bottom plate (1) after bottom plate (1) sclerosis, connecting portion (21) and a plurality of parallel steel bar truss (3) welded connection.

2. The disassembly-free steel bar truss floor deck according to claim 1, wherein the connecting plates (2) are a plurality of strips which are parallel at intervals and penetrate through the length direction of the bottom plate or are integrated plates covering the upper side of the bottom plate (1).

3. The non-dismantling steel bar truss floor deck according to claim 2, wherein the anchoring part (22) is a part of the connecting plate (2) which is punched and turned towards the bottom plate (1) or a part which is bent and extended towards the bottom plate (1) and is integrally formed with the connecting plate (2).

4. Floor deck according to claim 3, characterized in that said anchoring part (22) is distributed with a number of holes (23).

5. The non-dismantling steel bar truss floor deck according to any one of claims 1 to 4, wherein anchor holes (24) are uniformly distributed in the connecting plates (2), and the anchor parts (22) of the connecting plates (2) which are turned downwards are arranged on the peripheries of the anchor holes (24).

6. The demolition-free steel-bar truss floor deck according to claim 5, wherein the anchoring part (22) has a fan shape with a sharp corner, and the side part has a saw-tooth shape with the sharp corner inserted into the bottom plate (1).

7. The non-dismantling steel bar truss floor deck as claimed in any one of claims 1-2, wherein the anchoring part (22) is a welding anchoring steel bar connected to the lower side of the connecting plate (2) or a protruding pillar (222) protruding from the lower side of the connecting plate (2), and the anchoring part (22) is bent to form an anchoring foot (221).

8. The disassembly-free steel bar truss floor deck according to claim 1, wherein the connecting plate (2) is a contour plate, and the bottom plate (1) is a cement plate, a cement fiberboard, a heat insulation plate or a decorative plate.

9. The non-dismantling steel bar truss floor deck according to claim 1, wherein the thickness of the connecting plate is 0.3-1mm, the connecting portion (21) is 0-5mm higher than the upper side of the bottom plate (1), the distance between the anchoring portions (22) and the lower side of the formwork (10) is 0.5-5mm, and the number of the anchoring portions (22) is 100 or more per square meter.

10. The disassembly-free steel bar truss floor deck according to any one of claims 1 to 4,7 to 9, wherein the truss is a steel bar truss (31) which comprises an upper chord steel bar (311), a lower chord steel bar (313) and a web member steel bar (312) connecting the upper chord steel bar (311) and the lower chord steel bar (312), and the web member steel bar (312) is connected with the connecting plate (2) in a welding way.

11. The non-dismantling steel bar truss floor deck as claimed in claim 10, wherein the web member steel bars (312) are connected with the lower chord steel bars (313) and then turned outwards to form connecting feet (3121), and the connecting feet (3121) are welded to the connecting parts (21).

12. The non-dismantling steel bar truss floor deck according to claim 11, wherein the connecting feet (3121) are evenly spaced at both sides of the steel bar truss (3), the connecting feet (3121) are substantially parallel to the connecting portion (21) and are welded by spot welding, and both ends of the steel bar truss (3) respectively protrude from the bottom plate (1) for supporting on a building.

13. The demolition-free steel bar truss floor deck according to any one of claims 1-4,7-8, further comprising support members (5) spaced apart on both sides above the formwork (10), wherein the support members (5) are fixedly connected to the formwork (10) and extend beyond the sides of the formwork (10) to be able to contact with an adjacent formwork.

14. The disassembly-free steel bar truss floor deck according to claim 13, wherein the supporting members (5) are metal plates welded above the edges of the connecting plates (2), the supporting members (5) extend out of the edges of the connecting plates (2) and can abut against the upper surfaces of the connecting plates (2) of the adjacent floor decks, or the supporting members abut against or are welded to the upper surfaces of the connecting plates (2), and the supporting members (5) on the two sides of each formwork (10) extend out of the side edges of the corresponding formwork (10) in a staggered manner.

15. The template manufacturing method is characterized by comprising the following steps:

step 1, manufacturing a slab of a bottom plate: uniformly stirring cement, cellulose and water and paving the mixture into a plate blank;

step 2, laying a connecting plate: punching or welding a connecting plate to form an anchoring part, then paving the connecting plate on the surface of the plate blank, leading the connecting part of the connecting plate to face the same side of the plate blank, sinking the anchoring part into the plate blank, pressing and fixing the plate blank and the connecting plate, and pressing into a plate with the required density and thickness of the bottom plate;

step 3, forming: after pressing, placing the plate, and solidifying and hardening the plate blank into the plate;

step 4, assembling: and (3) cutting the formed plate into the required size, or paving the plate blank in a mould with the required size in the step 1 to form the plate blank with the required size.

16. A method for manufacturing a non-dismantling steel bar truss floor support plate, which is characterized in that,

step 1, manufacturing a slab of a bottom plate: uniformly stirring cement, cellulose and water and paving the mixture into a plate blank;

step 2, laying a connecting plate: laying a connecting plate in the surface of the plate blank, wherein the connecting plate is provided with an anchoring part and a connecting part, the connecting part faces the same side of the plate blank, the anchoring part is sunk into the plate blank, the plate blank and the connecting plate are pressed and fixed, and a plate with the density and the thickness required by the bottom plate is pressed;

step 3, forming: after pressing, the plate is placed, so that the plate blank is solidified and hardened into the plate;

step 4, assembling: cutting the formed plate into a required size, paving a steel bar truss on one side of a connecting plate in parallel, and welding and fixing the steel bar truss and the connecting plate;

the plate material of the step 5 is cut into the required size and can also be finished in the step 1, namely, the plate blank is laid in a mould with a certain size to form a plate blank with the required size; and (3) when the connecting plate is fixed in the step (2), the connecting part is exposed out of the surface of the plate blank, or the connecting part is buried in the plate blank, and the upper surface part of the plate formed in the step (3) is partially removed through machining so that the connecting part is exposed.

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