Block-assembled two-way laminated slab system and hollow concrete floor slab

Abstract

The utility model provides a bi-directional laminated slab system assembled in blocks and a hollow concrete floor slab. The bi-directional laminated slab system is formed by assembling a plurality of bi-directional laminated slabs in a beam grid area to form a bi-directional force transmission laminated slab system. The bidirectional laminated slab comprises a bottom plate, a first combined structure frame and a second combined structure frame. Furthermore, the bottom of the first combined structure frame is embedded in the bottom plate, and the first combined structure frame is arranged in the length direction of the two-way laminated slab and forms force transmission in the length direction. The bottom of the second combined structure frame is embedded in the bottom plate, and the second combined structure frame is arranged in the width direction of the two-way laminated slab; a splicing connecting part is formed at the end part of the second combined structure frame; wherein the bottom plates of the adjacent two-way laminated slabs are spliced, the splicing connecting parts of the adjacent two-way laminated slabs are fixedly connected, and force transmission in the width direction is formed.

Description

Technical Field

[0001] The utility model relates to the field of assembled buildings, in particular to a two-way composite board system assembled in blocks and a hollow concrete floor slab. Background Art

[0002] In the current hollow slab construction, when the composite slab solution is adopted, due to the large span of the slab (generally greater than 8m) and the low rigidity of the prefabricated part of the composite slab, temporary support needs to be set at the bottom of the prefabricated bottom slab before pouring concrete. If the rigidity is increased by prefabricating the two-way slab in the factory, the large hollow slab cannot achieve the two-way force transmission effect before pouring concrete because the transportation size is generally within 3m. How to improve the rigidity of the prefabricated part of the composite slab and save temporary support is an urgent problem to be solved. Utility Model Content

[0003] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0004] The utility model provides a two-way composite plate system assembled in blocks, characterized in that a two-way composite plate system for transmitting two-way forces is formed by assembling a plurality of two-way composite plates in a beam grid area, and the two-way composite plates include:

[0005] Base plate;

[0006] A first combined structural frame, the bottom of which is buried in the bottom plate, and the first combined structural frame is arranged along the length direction of the bidirectional laminated plate to form a force transmission in the length direction;

[0007] A second combined structural frame, the bottom of which is buried in the bottom plate, and the second combined structural frame is arranged along the width direction of the bidirectional laminated plate; the ends of the second combined structural frame form an assembly connection portion;

[0008] Wherein, the bottom plates of adjacent two-way laminated plates are spliced ​​together, and the assembling connection parts of adjacent two-way laminated plates are fixedly connected to form force transmission in the width direction.

[0009] Preferably, the first combined structural frame at least includes an upper chord concrete rib and a first corrugated web member; the trough of the first corrugated web member is buried in the bottom plate, and the crest of the first corrugated web member is buried in the upper chord concrete rib.

[0010] Preferably, the number of the first combined structural frames is multiple groups, and the multiple groups of the first combined structural frames are arranged at intervals along the width direction of the bidirectional laminated plate.

[0011] Preferably, the second combined structural frame includes an upper chord and a second corrugated web; the crest of the second corrugated web is connected to the upper chord, and the trough of the second corrugated web is buried in the bottom plate; the assembled connection portion is defined as the end of the upper chord.

[0012] Preferably, the upper chord rod is located above the upper chord concrete rib, and the upper chord concrete rib is located on the inner side of the wave crest of the second corrugated web member.

[0013] Preferably, the top of the upper chord concrete rib is a trapezoidal structure, adapted to the inner side of the crest of the second corrugated web member.

[0014] Preferably, the upper chords of adjacent two-way composite plates are connected by welding via connecting ribs.

[0015] Preferably, a filling body is provided between adjacent first combined structural frames; and the upper chord rod is pressed against the filling body via a pressing member.

[0016] Preferably, the first corrugated web member is a steel tube web member, and the second corrugated web member is a steel bar web member; the first corrugated web member is a single-piece plane structure, and the second corrugated web member is a double-row quadrangular pyramid structure.

[0017] Preferably, the bottom plate is a prestressed bottom plate; transverse steel bars are arranged in the bottom plate along the width direction of the bidirectional composite plate, ends of the transverse steel bars are exposed to the outside, and the transverse steel bars at adjacent bidirectional composite plates are welded and connected.

[0018] Preferably, the bottom plates of adjacent two-way composite plates are joined at a position where they are provided with a notch, the transverse reinforcement is exposed in the notch, and the transverse reinforcement in the notch of adjacent two-way composite plates is connected by welding through overlapping short reinforcements.

[0019] The above technical solutions alone or in combination show the following beneficial effects:

[0020] After the two-way composite slab is transported to the construction site for connection, the two-way effect is realized within the entire axis network, the bending stiffness is greatly improved, and formwork and support are eliminated; and the width of the two-way composite slab is small during transportation, which is convenient for transportation;

[0021] The prefabricated part of the two-way composite plate is reinforced by the second combined structural frame due to its width direction rigidity, so that the two-way composite plate is not prone to cracks during transportation and hoisting.

[0022] The utility model also provides a hollow concrete floor, which at least includes a two-way composite board system assembled in blocks and a concrete layer, and is characterized in that after a plurality of the two-way composite boards are assembled and installed, the concrete layer is poured on the base plate and buries the first combined structural frame, the second combined structural frame and the filling body to form the hollow concrete floor.

[0023] The above technical solutions alone or in combination show the following beneficial effects:

[0024] After the two-way composite slab is transported to the construction site for connection, the two-way effect is achieved within the entire axis network, the bending stiffness is greatly improved, and formwork and support are eliminated, which can speed up the construction progress of the hollow slab. Because traditional full-floor support is not required, multiple floors can be constructed at the same time, and there is no need to wait until the next floor is completed before starting the construction of the previous floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the installation of the bidirectional composite panel system assembled in blocks in the utility model.

[0026] Figure 2 It is a structural schematic diagram of the bidirectional laminated plate in the utility model.

[0027] Figure 3 It is a longitudinal and transverse arrangement diagram of the first combined structural frame and the second combined structural frame in the utility model.

[0028] Figure 4 It is a front view of the bidirectional composite plate in the utility model.

[0029] Figure 5 It is a disassembly diagram of the bidirectional composite plate in the utility model.

[0030] Figure 6 It is a schematic diagram of the assembly structure of the bottom plate of the utility model.

[0031] Figure 7 for Figure 6 A partially enlarged schematic diagram of . DETAILED DESCRIPTION

[0032] The following description is given to enable those skilled in the art to implement and use the utility model and incorporate it into specific application contexts. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the utility model is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0033] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.

[0034] The reader is reminded of all documents and literature filed simultaneously with this specification and open to public inspection, and the contents of all such documents and literature are incorporated herein by reference. Unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) can be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features.

[0035] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] See also Figure 1 to Figure 7 , this embodiment provides a two-way composite plate system assembled in blocks, which is a composite plate system with two-way force transmission formed by assembling multiple two-way composite plates 1 in a beam grid area. Among them, the two-way composite plate 1 includes a base plate 11, a first combined structural frame 12 and a second combined structural frame 13. Further, the bottom of the first combined structural frame 12 is buried in the base plate 11, and the first combined structural frame 12 is arranged along the length direction of the two-way composite plate 1, and forms a force transmission in the length direction; the bottom of the second combined structural frame 13 is buried in the base plate 11, and the second combined structural frame 13 is arranged along the width direction of the two-way composite plate 1; the end of the second combined structural frame 13 forms an assembly connection portion 1310; wherein, the base plates 11 of adjacent two-way composite plates 1 are assembled, and the assembly connection portions 1310 of adjacent two-way composite plates 1 are fixedly connected, and form a force transmission in the width direction.

[0041] The “beam grillage area” in this embodiment is an installation area of ​​a two-way composite plate system, which is formed by columns 2 and beams 3. In this embodiment, four columns 2 and four beams 3 enclose the beam grillage area.

[0042] See also Figure 1 , Figure 2 and Figure 3 , the first combined structural frame 12 is arranged in the length direction of the bidirectional composite plate 1. Specifically, the first combined structural frame 12 at least includes an upper chord concrete rib 121 and a first corrugated web member 122, wherein the trough of the first corrugated web member 122 is buried in the bottom plate 11, and the crest of the first corrugated web member 122 is buried in the upper chord concrete rib 121. Further, the first combined structural frame 12 may include a lower chord member or may not include a lower chord member.

[0043] The first combined structural frame 12 and the bottom plate 11 are prefabricated parts of the bidirectional composite plate 1, wherein the number of the first combined structural frames 12 is multiple groups, and the multiple groups of first combined structural frames 12 are arranged at intervals along the width direction of the bidirectional composite plate 1. A filler 14 is also provided between adjacent first combined structural frames 12, and the filler 14 serves as the hollow part after concrete pouring to form a hollow plate. Preferably, the filler 14 is a foam material or other resin material. When the concrete is formed and reaches the designed strength, the filler 14 as an inner mold has completed its "work mission". The cast-in-place concrete hollow floor slab has reduced its own weight, reduced the amount of concrete, increased the span, reduced the floor height, and has good sound insulation and heat insulation effects due to the placement of the inner mold.

[0044] Please combine Figure 3 and Figure 4, the second combined structural frame 13 is arranged along the width direction of the two-way composite plate 1. Specifically, the second combined structural frame 13 includes an upper chord 131 and a second corrugated web 132. The crest of the second corrugated web 132 is connected to the upper chord 131, and the trough of the second corrugated web 132 is buried in the bottom plate 11. Further, the above-mentioned assembly connection portion 1310 can be defined as the end of the upper chord 131. The upper chords 131 of adjacent two-way composite plates 1 are connected by Figure 7 The connecting ribs 133 shown in FIG. 1 are connected by welding.

[0045] In order to facilitate the arrangement of the first combined structural frame 12 and the second combined structural frame 13 in the longitudinal and transverse directions, the upper chord rod 131 of the second combined structural frame 13 is located above the upper chord concrete rib 121 of the first combined structural frame 12. Furthermore, the upper chord concrete rib 121 is located on the inner side of the wave crest of the second corrugated web member 132. Preferably, as Figure 4 and Figure 5 As shown, the top of the upper chord concrete rib 121 is a trapezoidal structure, which is adapted to the inner side of the wave crest of the second corrugated web member 132 to ensure continuous force transmission of the web member of the second combined structural frame 13 .

[0046] In this embodiment, as a preferred implementation, the first corrugated web member 122 is a steel tube web member, and the second corrugated web member 132 is a steel bar web member. Among them, the first corrugated web member 122 is a single-piece planar structure, and the second corrugated web member 132 is a double-row quadrangular pyramid structure. When the second corrugated web member 132 is a double-row quadrangular pyramid structure, there is no need to set a lower chord, and it is only necessary to bend the trough outward to hook the steel bars in the bottom plate. It should be noted that the structure of the first corrugated web member 122 and the second corrugated web member 132 is only a preferred embodiment of this embodiment and is not limited to this. For example, the second corrugated web member 132 can also be a single-piece planar structure, and the first corrugated web member 122 can also be a double-row quadrangular pyramid structure. It is only necessary to complete the vertical and horizontal arrangement of the first combined structural frame 12 and the second combined structural frame 13 in the spatial structure.

[0047] Further, please combine Figure 6 and Figure 7 , the bottom plate 11 is a prestressed bottom plate. Among them, transverse steel bars 111 are arranged in the bottom plate 11 along the width direction of the two-way composite plate 1, and the ends of the transverse steel bars 111 are exposed to the outside. The transverse steel bars 111 at the joints of adjacent two-way composite plates 1 are welded and connected. At this time, the transverse steel bars 111 are defined as the assembly connection part 1310, which completes the connection of the two-way composite plate 1 together with the upper chord 131 mentioned above.

[0048] Furthermore, the bottom plates 11 of adjacent two-way composite plates 1 are provided with notches 110 at the jointed positions, and the transverse reinforcements 111 are exposed in the notches 110. The transverse reinforcements 111 in the notches 110 of adjacent two-way composite plates 1 are welded and connected by overlapping short reinforcements 112. Alternatively, the second corrugated web members 132 in the second combined structural frame 13 are welded to the transverse reinforcements 111 in the notches 110 of the adjacent bottom plates 11, so as to realize the stable connection of the second combined structural frame.

[0049] The above technical solutions alone or in combination show the following beneficial effects:

[0050] After the bidirectional composite plate 1 is transported to the construction site for connection, a bidirectional effect is achieved within the entire axis network (beam grid area), the bending stiffness is greatly improved, and formwork and support can be eliminated; and the width of the bidirectional composite plate 1 is small during transportation, which is convenient for transportation;

[0051] The prefabricated part of the bidirectional composite plate 1 is reinforced by the second combined structural frame 13 due to its width direction rigidity, so that the bidirectional composite plate 1 is not prone to cracks during transportation and hoisting.

[0052] Embodiment 2:

[0053] See also Figure 1 to Figure 7 The utility model also provides a hollow concrete floor, which at least includes a two-way composite board system assembled in blocks and a concrete layer, wherein after a plurality of two-way composite boards 1 are assembled and installed, the concrete layer is poured on the bottom plate 11 and buries the first combined structural frame 12, the second combined structural frame 13 and the filling body 14 to form a hollow concrete floor. Figure 1 This is a schematic diagram of the installation of a two-way composite slab system assembled in blocks, and after pouring the concrete layer, it becomes a hollow concrete floor slab. However, in order to clearly express the structural improvement of this embodiment, the concrete layer is not shown, but those skilled in the art should know that the concrete layer, as the floor slab concrete, is also the on-site operation part of the composite slab, and conventional on-site pouring can be performed.

[0054] Specifically, the block-assembled bidirectional composite plate system is composed of multiple bidirectional composite plates 1 assembled in a beam grid area to form a bidirectional force-transmitting composite plate system. Among them, the bidirectional composite plate 1 includes a base plate 11, a first combined structural frame 12 and a second combined structural frame 13. Further, the bottom of the first combined structural frame 12 is buried in the base plate 11, and the first combined structural frame 12 is arranged along the length direction of the bidirectional composite plate 1, and forms a force transmission in the length direction; the bottom of the second combined structural frame 13 is buried in the base plate 11, and the second combined structural frame 13 is arranged along the width direction of the bidirectional composite plate 1; the end of the second combined structural frame 13 forms an assembled connection portion 1310; wherein, the base plates 11 of adjacent bidirectional composite plates 1 are assembled, and the assembled connection portions 1310 of adjacent bidirectional composite plates 1 are fixedly connected, and form a force transmission in the width direction.

[0055] The “beam grillage area” in this embodiment is an installation area of ​​a two-way composite plate system, which is formed by columns 2 and beams 3. In this embodiment, four columns 2 and four beams 3 enclose the beam grillage area.

[0056] The first combined structural frame 12 is arranged in the length direction of the bidirectional composite plate 1. Specifically, the first combined structural frame 12 at least includes an upper chord concrete rib 121 and a first corrugated web member 122, wherein the trough of the first corrugated web member 122 is buried in the bottom plate 11, and the crest of the first corrugated web member 122 is buried in the upper chord concrete rib 121. Further, the first combined structural frame 12 may include a lower chord member or may not include a lower chord member.

[0057] The first combined structural frame 12 and the bottom plate 11 are prefabricated parts of the bidirectional composite plate 1, wherein the number of the first combined structural frames 12 is multiple groups, and the multiple groups of first combined structural frames 12 are arranged at intervals along the width direction of the bidirectional composite plate 1. A filler 14 is also provided between adjacent first combined structural frames 12, and the filler 14 serves as the hollow part after concrete pouring to form a hollow plate. Preferably, the filler 14 is a foam material or other resin material. When the concrete is formed and reaches the designed strength, the filler 14 as an inner mold has completed its "work mission". The cast-in-place concrete hollow floor slab has reduced its own weight, reduced the amount of concrete, increased the span, reduced the floor height, and has good sound insulation and heat insulation effects due to the placement of the inner mold.

[0058] The second combined structural frame 13 is arranged along the width direction of the bidirectional composite plate 1. Specifically, the second combined structural frame 13 includes an upper chord 131 and a second corrugated web 132. The crest of the second corrugated web 132 is connected to the upper chord 131, and the trough of the second corrugated web 132 is buried in the bottom plate 11. Further, the above-mentioned assembly connection portion 1310 can be defined as the end of the upper chord 131. The upper chords 131 of adjacent bidirectional composite plates 1 are connected to each other by the upper chord 131. Figure 7 The connecting ribs 133 shown in FIG. 1 are connected by welding.

[0059] In order to facilitate the arrangement of the first combined structural frame 12 and the second combined structural frame 13 in the longitudinal and transverse directions, the upper chord rod 131 of the second combined structural frame 13 is located above the upper chord concrete rib 121 of the first combined structural frame 12. Furthermore, the upper chord concrete rib 121 is located on the inner side of the wave crest of the second corrugated web member 132. Preferably, as Figure 4 and Figure 5 As shown, the top of the upper chord concrete rib 121 is a trapezoidal structure, which is adapted to the inner side of the wave crest of the second corrugated web member 132 to ensure continuous force transmission of the web member of the second combined structure frame.

[0060] In this embodiment, as a preferred implementation, the first corrugated web member 122 is a steel tube web member, and the second corrugated web member 132 is a steel bar web member. Among them, the first corrugated web member 122 is a single-piece planar structure, and the second corrugated web member 132 is a double-row quadrangular pyramid structure. When the second corrugated web member 132 is a double-row quadrangular pyramid structure, there is no need to set a lower chord, and it is only necessary to bend the trough outward to hook the steel bars in the bottom plate. It should be noted that the structure of the first corrugated web member 122 and the second corrugated web member 132 is only a preferred embodiment of this embodiment and is not limited to this. For example, the second corrugated web member 132 can also be a single-piece planar structure, and the first corrugated web member 122 can also be a double-row quadrangular pyramid structure. It is only necessary to complete the vertical and horizontal arrangement of the first combined structural frame 12 and the second combined structural frame 13 in the spatial structure.

[0061] Further, please combine Figure 6 and Figure 7 , the bottom plate 11 is a prestressed bottom plate. Among them, transverse steel bars 111 are arranged in the bottom plate 11 along the width direction of the two-way composite plate 1, and the ends of the transverse steel bars 111 are exposed to the outside. The transverse steel bars 111 at the joints of adjacent two-way composite plates 1 are welded and connected. At this time, the transverse steel bars 111 are defined as the assembly connection part 1310, which completes the connection of the two-way composite plate 1 together with the upper chord 131 mentioned above.

[0062] Furthermore, the bottom plates 11 of adjacent two-way composite plates 1 are provided with notches 110 at the jointed positions, and the transverse reinforcements 111 are exposed in the notches 110. The transverse reinforcements 111 in the notches 110 of adjacent two-way composite plates 1 are welded and connected by overlapping short reinforcements 112. Alternatively, the second corrugated web members 132 in the second combined structural frame 13 are welded to the transverse reinforcements 111 in the notches 110 of the adjacent bottom plates 11, so as to realize the stable connection of the second combined structural frame.

[0063] The above technical solutions alone or in combination show the following beneficial effects:

[0064] After the two-way composite slab 1 is transported to the construction site for connection, the two-way effect is achieved within the entire axis network, the bending stiffness is greatly improved, formwork and support are eliminated, and the construction progress of the hollow slab can be accelerated. Because traditional full-floor support is not required, multiple floors can be constructed at the same time, and there is no need to wait until the next floor is completed before starting the construction of the previous floor.

[0065] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the scope of protection of the utility model shall be defined by the scope of the attached claims.

Claims

1. A two-way laminated plate system assembled in blocks, characterized in that: A bidirectional force-transmitting composite plate system is formed by assembling a plurality of bidirectional composite plates in a beam grid area, wherein the bidirectional composite plate comprises: Base plate; A first combined structural frame, the bottom of which is buried in the bottom plate, and the first combined structural frame is arranged along the length direction of the bidirectional laminated plate to form a force transmission in the length direction; A second combined structural frame, the bottom of which is buried in the bottom plate, and the second combined structural frame is arranged along the width direction of the bidirectional laminated plate; the ends of the second combined structural frame form an assembly connection portion; Wherein, the bottom plates of adjacent two-way laminated plates are spliced ​​together, and the assembling connection parts of adjacent two-way laminated plates are fixedly connected to form force transmission in the width direction.

2. The two-way laminated board system assembled in blocks as claimed in claim 1, characterized in that: The first combined structural frame at least includes an upper chord concrete rib and a first corrugated web member; the trough of the first corrugated web member is buried in the bottom plate, and the crest of the first corrugated web member is buried in the upper chord concrete rib.

3. The two-way laminated board system assembled in blocks as claimed in claim 2, characterized in that: The number of the first combined structural frames is multiple, and the multiple groups of the first combined structural frames are arranged at intervals along the width direction of the bidirectional laminated plate.

4. The two-way laminated board system assembled in blocks as claimed in claim 2, characterized in that: The second combined structural frame includes an upper chord and a second corrugated web member; the crest of the second corrugated web member is connected to the upper chord, and the trough of the second corrugated web member is buried in the bottom plate; the assembled connection portion is defined as the end of the upper chord.

5. The two-way laminated board system assembled in blocks as claimed in claim 4, characterized in that: The upper chord rod is located above the upper chord concrete rib, and the upper chord concrete rib is located on the inner side of the wave crest of the second corrugated web member.

6. The two-way laminated board system assembled in blocks as claimed in claim 5, characterized in that: The top of the upper chord concrete rib is in a trapezoidal structure and is adapted to the inner side of the wave crest of the second corrugated web member.

7. The two-way laminated board system assembled in blocks as claimed in claim 5, characterized in that: The upper chords of adjacent two-way laminated plates are connected by welding via connecting ribs.

8. The two-way laminated board system assembled in blocks as claimed in claim 7, characterized in that: A filling body is provided between adjacent first combined structural frames; and the upper chord rod is pressed against the filling body through a pressing member.

9. The two-way laminated board system assembled in blocks as claimed in claim 4, characterized in that: The first corrugated web member is a steel tube web member, and the second corrugated web member is a steel bar web member; the first corrugated web member is a single-piece plane structure, and the second corrugated web member is a double-row quadrangular pyramid structure.

10. The block-assembled two-way laminated board system according to claim 1, characterized in that: The bottom plate is a prestressed bottom plate; transverse steel bars are arranged in the bottom plate along the width direction of the bidirectional composite plate, the ends of the transverse steel bars are exposed to the outside, and the transverse steel bars at the joints of adjacent bidirectional composite plates are welded and connected.

11. The two-way laminated board system assembled by blocks as claimed in claim 10, characterized in that: The bottom plates of adjacent two-way composite plates are joined at a notch, the transverse steel bars are exposed in the notch, and the transverse steel bars in the notches of adjacent two-way composite plates are connected by welding through overlapping short steel bars.

12. A hollow concrete floor slab, comprising at least the two-way laminated slab system assembled in blocks as claimed in claim 8 and a concrete layer, characterized in that: After a plurality of the two-way composite panels are assembled and installed, the concrete layer is poured on the base plate and buries the first combined structural frame, the second combined structural frame and the filling body to form the hollow concrete floor.

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