Fabricated concrete industrial factory building structure

Abstract

The invention discloses a fabricated concrete industrial factory building structure, and relates to the technical field of industrial factory buildings. The assembly type concrete industrial factory building structure comprises a plurality of layers of laminates, the laminates are connected and supported through prefabricated concrete stand columns, each layer of laminate comprises a frame built through a concrete steel structure and a pavement structure laid on the top of the frame, and the frame comprises concrete cross beams, concrete longitudinal beams and concrete secondary beams. The concrete cross beams, the concrete longitudinal beams and the prefabricated concrete stand columns are perpendicularly connected through the main nodes. Concrete and I-shaped steel are combined and poured into a firmer beam column, stable installation and connection can be achieved only by using main joints and secondary joints to be matched with bolts at the connecting positions of all the parts, then a small amount of welding is conducted, more stability is achieved, the construction efficiency is high, follow-up dismantling work can be conveniently conducted, and the top surface layer is spliced through non-rib-out laminated plates, so that the construction cost is reduced. And then the concrete pavement is paved, so that the construction is relatively simple and rapid.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial plants, and particularly to a prefabricated concrete industrial plant structure. Background Art

[0002] The current industrial plant structures are usually built with steel structures, and a large number of bolts are usually used to fix between the steel structures, or directly welded. When using bolt connection, the force is basically borne on the bolts, and the shear stress is relatively large. When using the direct welding method, during the construction of a large number of steel structures, the efficiency is low, and operations such as support and positioning are also required. Insufficient welding quality is likely to cause problems such as later fracture, and the strength is limited. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a prefabricated concrete industrial plant structure, which solves the problems existing in the fixing method during the construction of the current steel structure plants.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A prefabricated concrete industrial plant structure includes multiple layers of plates, and each layer of plates is connected and supported by precast concrete columns. The plate includes a frame built with concrete and steel structures, and a paving structure laid on the top of the frame. The frame includes concrete cross beams, concrete longitudinal beams, and concrete secondary beams. The concrete cross beams, concrete longitudinal beams, and precast concrete columns are perpendicularly connected to each other through main nodes, and two concrete cross beams and two concrete longitudinal beams are spliced to form a square frame. Multiple concrete secondary beams are distributed in parallel between the square frames, and both ends of the concrete secondary beams are installed on the concrete cross beams through secondary nodes in a lapping manner. The main nodes and secondary nodes are detachably connected to the concrete cross beams, concrete longitudinal beams, and precast concrete columns.

[0005] Preferably, the concrete cross beam is composed of a first I-beam and a first concrete square column cast outside it;

[0006] The concrete longitudinal beam is composed of a second I-beam and a second concrete square column cast outside it;

[0007] The concrete secondary beam is composed of a third I-beam and a third concrete square column cast outside it;

[0008] The precast concrete column is composed of a fourth I-beam and a fourth concrete square column cast outside it;

[0009] Both ends of the first I-beam, second I-beam, third I-beam, and fourth I-beam symmetrically extend out of the first concrete square column, second concrete square column, third concrete square column, and fourth concrete square column.

[0010] Preferably, the main node includes:

[0011] A sleeve, which is sleeved on the end of a precast concrete column to connect the upper and lower precast concrete columns;

[0012] Side connecting I-beams, which are welded around the sleeve for connecting the concrete cross beam and the concrete longitudinal beam;

[0013] The ends of the first I-beam and the second I-beam and the ends of the side connecting I-beams are all provided with adapted inclined surfaces, so that the first I-beam and the second I-beam are placed on the side connecting I-beams through the inclined surfaces. U-shaped steel is clamped on the sides of the first I-beam, the second I-beam and the side connecting I-beam and is connected with bolts. Positioning convex blocks are extended and provided at the tops of the end faces of the first I-beam and the second I-beam, and positioning grooves adapted to the positioning convex blocks are opened at the tops of the end faces of the side connecting I-beams.

[0014] Preferably, the length that the end of the fourth I-beam extends out of the fourth concrete square column is consistent with the depth of the sleeve, and a notch with a length of half of the depth of the sleeve is opened at the end of the middle steel plate of the fourth I-beam, and the width of the notch is consistent with the thickness of the middle steel plate of the fourth I-beam. When the upper and lower precast concrete columns are connected, they are twisted 90° to each other along the vertical axis, so that the notches of the upper and lower fourth I-beams are inserted into each other.

[0015] Preferably, when the fourth I-beams of the upper and lower precast concrete columns are inserted into the sleeve, concrete is filled in the sleeve, and through grooves are opened in the middle steel plates of the fourth I-beams to increase the connection strength of the concrete.

[0016] Preferably, the secondary joint includes:

[0017] An inverted U-shaped steel sleeve, which is buckled on the concrete cross beam, and a plurality of positioning grooves adapted to the inverted U-shaped steel sleeve and equidistant are opened on the first concrete square column of the concrete cross beam;

[0018] An extended supporting plate, which is horizontally bent from both ends of the inverted U-shaped steel sleeve to both sides and is used for supporting the third I-beam;

[0019] A triangular positioning plate, which extends from both sides of each side plate of the inverted U-shaped steel sleeve to the outside and is bent to form a triangle for positioning and clamping the middle vertical plate of the third I-beam.

[0020] Preferably, a section of the bottom cross plate at both ends of the third I-beam is cut off, and the middle vertical plate above the part where the bottom cross plate of the third I-beam is cut off is inserted between the triangular positioning plates during installation, and the top cross plate of the third I-beam is placed on the triangular positioning plates.

[0021] Preferably, the bottom corners of the middle vertical plates at both ends of the third I-beam are cut to form wedge-shaped blocks, and clamping grooves adapted to the wedge-shaped blocks are opened inside the extended supporting plate, and the wedge-shaped blocks are inserted into the clamping grooves to limit the third I-beam from sliding off the extended supporting plate.

[0022] Preferably, a connecting plate is fixed between the bottoms of the extended supporting plates on both sides of the secondary node by bolts. The bottom horizontal plate of the second I-beam and on both sides of the middle vertical plate are welded through bolts, and the bottom ends of the bolts penetrate through the connecting plate and are locked by nuts.

[0023] Preferably, the paving structure includes a non-reinforced laminated slab spliced and laid on the top of the frame, and a concrete paving is poured on the top of the non-reinforced laminated slab.

[0024] The present invention provides a prefabricated concrete industrial building structure. Compared with the prior art, it has the following beneficial effects:

[0025] 1. In this prefabricated concrete industrial building structure, by combining concrete and I-beams, more solid beams and columns are cast. At each connection part, only the main node and the secondary node are used in combination with bolts to achieve stable installation and connection, and then a small amount of welding is carried out to be more stable. The construction efficiency is high, and it is also convenient for subsequent demolition work. The top surface layer adopts the method of splicing non-reinforced laminated slabs and then laying concrete paving, and the construction is also relatively simple and fast.

[0026] 2. In this prefabricated concrete industrial building structure, the main node can be connected to the concrete cross beam, the concrete longitudinal beam and the precast concrete column at the same time. When the concrete cross beam and the concrete longitudinal beam are connected to the main node, they can be connected and fixed by the U-shaped steel on the side in combination with bolts. At the same time, the U-shaped steel can also improve the connection strength at this place. The overlapping effect of the inclined surfaces between the I-beams can further play a supporting role, reduce the pressure on the U-shaped steel. At the same time, the cooperation between the positioning convex blocks on the I-beams of the concrete cross beam and the concrete longitudinal beam and the positioning grooves on the I-beams of the main node can achieve a positioning effect during the loading process, so that it is not necessary to always support the concrete cross beam and the concrete longitudinal beam to align with the main node during the fixing process of the U-shaped steel, which is more labor-saving and can also prevent the concrete cross beam and the concrete longitudinal beam from slipping. The erection operation is convenient and stable.

[0027] 3. In this prefabricated concrete industrial building structure, by opening notches at the ends of the fourth I-beams of the precast concrete columns, the upper and lower precast concrete columns can be directly connected through the mutual engagement of the notches. After being inserted into each other, the socket joint and restraint of the sleeve of the main node are more stable. Concrete can also be poured into the sleeve to connect the upper and lower columns into one body. The through grooves opened on the fourth I-beams can further improve the tensile strength after entering the concrete. The structure is simple and the installation is firm.

[0028] 4. For the prefabricated concrete industrial building structure, between the square frames composed of concrete cross beams and concrete longitudinal beams, secondary joints are used to further connect the concrete secondary beams, which can increase the density of the overall frame. The positioning grooves reserved during the pouring of the concrete cross beams can also determine the installation spacing of the concrete secondary beams. When the secondary joints are connected to the third I-beam of the concrete secondary beam, extension supporting plates and triangular positioning plates are bent out on the sides and bottoms of the secondary joints. On the one hand, the two can be used to support the third I-beam, and at the same time, the triangular positioning plates can also position the middle vertical plate of the third I-beam to achieve the anti-deviation effect. The wedge-shaped blocks reserved during the cutting of the bottom of the third I-beam can also hook the card slots on the extension supporting plates to improve the tensile strength. Then, at the bottom, the two ends of the inverted U-shaped steel sleeve are connected by bolts, connecting the concrete secondary beam and the third I-beam at the same time. While connecting the two third I-beams on both sides more stably, the pressure can be further dispersed to the concrete secondary beam, improving the overall stress strength. Description of the Drawings

[0029] Figure 1 Schematic diagram of the overall building structure of the present invention;

[0030] Figure 2 Schematic diagram of the local frame structure of the present invention;

[0031] Figure 3 Schematic diagram of the butt joint between the main joint and the concrete cross beam of the present invention;

[0032] Figure 4 Schematic diagram of the butt joint between the precast concrete column and the sleeve of the present invention;

[0033] Figure 5 Schematic diagram of the mutual insertion of the precast concrete columns of the present invention;

[0034] Figure 6 In the present invention Figure 5 Local enlarged view at A;

[0035] Figure 7 Stereogram of the concrete secondary beam of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the secondary joint of the present invention;

[0037] Figure 9 Bottom elevation exploded view of the concrete cross beam, the third I-beam and the secondary joint of the present invention;

[0038] Figure 10 Bottom elevation exploded view of the first I-beam, the third I-beam and the secondary joint of the present invention.

[0039] In the figure: 1 - precast concrete column, 11 - fourth I-beam, 12 - fourth concrete square column, 13 - notch, 14 - through groove;

[0040] 2 - Rebar - free composite slab;

[0041] 3 - Concrete pavement;

[0042] 4 - Concrete cross - beam, 41 - First I - beam, 42 - First concrete square column, 43 - Bump, 44 - Positioning groove;

[0043] 5 - Concrete longitudinal beam, 51 - Second I - beam, 52 - Second concrete square column;

[0044] 6 - Concrete secondary beam, 61 - Third I - beam, 62 - Third concrete square column, 63 - Wedge - shaped block;

[0045] 7 - Main node, 71 - Sleeve, 72 - Side connecting I - beam, 73 - U - shaped steel, 74 - Positioning groove;

[0046] 8 - Secondary node, 81 - Inverted U - shaped steel sleeve, 82 - Extended supporting plate, 83 - Triangular positioning plate, 84 - Card slot, 85 - Connecting plate. Detailed implementation mode

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] The present invention provides four technical solutions:

[0049] Figures 1 - 2 and Figure 5 The first implementation mode is shown: An assembled concrete industrial plant structure includes multiple - layer plates, and each layer of plates is connected and supported by precast concrete columns 1. The layer plate includes a frame built by concrete steel structures, and a pavement structure laid on the top of the frame. The pavement structure includes a rebar - free composite slab 2 spliced and laid on the top of the frame, and a concrete pavement 3 is poured on the top of the rebar - free composite slab 2;

[0050] The frame includes a concrete cross - beam 4, a concrete longitudinal beam 5 and a concrete secondary beam 6. The concrete cross - beam 4, the concrete longitudinal beam 5 and the precast concrete column 1 are perpendicularly connected to each other through a main node 7. Two concrete cross - beams 4 and two concrete longitudinal beams 5 are spliced to form a square frame. Multiple concrete secondary beams 6 are arranged in parallel between the square frames, and both ends of the concrete secondary beam 6 are lapped and installed on the concrete cross - beam 4 through a secondary node 8. The main node 7 and the secondary node 8 are detachably connected to the concrete cross - beam 4, the concrete longitudinal beam 5 and the precast concrete column 1.

[0051] The concrete cross beam 4 is composed of a first I-beam 41 and a first concrete square column 42 cast outside it;

[0052] The concrete longitudinal beam 5 is composed of a second I-beam 51 and a second concrete square column 52 cast outside it;

[0053] The concrete secondary beam 6 is composed of a third I-beam 61 and a third concrete square column 62 cast outside it;

[0054] The precast concrete column 1 is composed of a fourth I-beam 11 and a fourth concrete square column 12 cast outside it;

[0055] The ends of the first I-beam 41, the second I-beam 51, the third I-beam 61 and the fourth I-beam 11 symmetrically extend out of the first concrete square column 42, the second concrete square column 52, the third concrete square column 62 and the fourth concrete square column 12.

[0056] In the present invention, by combining concrete with I-beams, more solid beams and columns are cast. For the connection parts of each part, only the main node 7 and the secondary node 8 are used in combination with bolts to achieve stable installation and connection, and then a small amount of welding is carried out to be more stable. The construction efficiency is high, and it is also convenient for subsequent demolition work. For the top surface layer, the non-reinforced composite slab 2 is spliced, and then the concrete paving 3 is laid, and the construction is also relatively simple and fast.

[0057] Figure 3 The second implementation mode is shown. The main difference from the first implementation mode is that the main node 7 includes:

[0058] A sleeve 71, sleeved on the end of the precast concrete column 1 to connect the upper and lower precast concrete columns 1;

[0059] A side connection I-beam 72, welded around the sleeve 71 for connecting the concrete cross beam 4 and the concrete longitudinal beam 5;

[0060] The ends of the first I-beam 41 and the second I-beam 51 and the ends of the side connection I-beam 72 are all set as matching inclined surfaces, so that the first I-beam 41 and the second I-beam 51 are placed on the side connection I-beam 72 through the inclined surfaces. U-shaped steel 73 is clamped into the sides of the first I-beam 41 and the second I-beam 51 and the side connection I-beam 72 for bolt connection. Positioning convex blocks 43 are extended at the tops of the end faces of the first I-beam 41 and the second I-beam 51. The positioning convex blocks 43 are trapezoidal or triangular to improve the root strength, and positioning grooves 74 adapted to the positioning convex blocks 43 are opened at the tops of the end faces of the side connection I-beam 72.

[0061] The main node 7 can be connected to the concrete cross beam 4, the concrete longitudinal beam 5 and the precast concrete column 1 at the same time. When the concrete cross beam 4 and the concrete longitudinal beam 5 are connected to the main node 7, they can be fixedly connected by the U-shaped steel 73 on the side with bolts. At the same time, the U-shaped steel 73 can also improve the connection strength at this place. The overlapping effect of the inclined surfaces between the I-shaped steels can further play a supporting role, reduce the pressure on the U-shaped steel 73. At the same time, the cooperation between the positioning bumps 43 on the I-shaped steel of the concrete cross beam 4 and the concrete longitudinal beam 5 and the positioning grooves 74 on the I-shaped steel of the main node 7 can achieve a positioning effect during the loading process, so that the concrete cross beam 4 and the concrete longitudinal beam 5 do not need to be always supported to align with the main node 7 during the fixing process of the U-shaped steel 73, which is more labor-saving and can also prevent the concrete cross beam 4 and the concrete longitudinal beam 5 from slipping, and the erection operation is convenient and stable.

[0062] Figures 4 - 6 The third implementation manner is shown. The main difference from the second implementation manner is that: the length of the end of the fourth I-shaped steel 11 extending out of the fourth concrete square column 12 is the same as the depth of the sleeve 71, and a notch 13 with a length of half of the depth of the sleeve 71 is opened at the end of the middle steel plate of the fourth I-shaped steel 11, and the width of the notch 13 is the same as the thickness of the middle steel plate of the fourth I-shaped steel 11. When the upper and lower precast concrete columns 1 are connected, they are twisted 90° to each other along the vertical axis, so that the notches 13 of the upper and lower fourth I-shaped steels 11 are inserted into each other.

[0063] While the fourth I-shaped steel 11 of the upper and lower precast concrete columns 1 is inserted into the sleeve 71, concrete is filled in the sleeve 71, and a through groove 14 is opened in the middle steel plate of the fourth I-shaped steel 11 to increase the concrete connection strength.

[0064] By opening a notch 13 at the end of the fourth I-shaped steel 11 of the precast concrete column 1, the upper and lower two precast concrete columns 1 can be directly connected through the mutual engagement of the notches 13. After the mutual insertion, the connection and restraint with the sleeve 71 of the main node 7 are more stable. Concrete can also be poured in the sleeve 71 to connect the upper and lower columns into one body. The through groove 14 opened on the fourth I-shaped steel 11 can further improve the tensile strength after entering the concrete, and the structure is simple and the installation is firm.

[0065] Figures 7 - 10 The fourth implementation manner is shown. The main difference from the first implementation manner is that: the secondary node 8 includes:

[0066] An inverted U-shaped steel sleeve 81, the inverted U-shaped steel sleeve 81 is buckled on the concrete cross beam 4, and a plurality of positioning grooves 44 adapted to and equidistant from the inverted U-shaped steel sleeve 81 are opened on the first concrete square column 42 of the concrete cross beam 4. The positioning grooves 44 are formed by molding through a mold during pouring;

[0067] The extended supporting plate 82 is formed by bending both ends of the inverted U-shaped steel sleeve 81 horizontally to both sides, and is used to support the third I-beam 61;

[0068] The triangular positioning plate 83 is formed by extending outward from both sides of each side plate of the inverted U-shaped steel sleeve 81 and bending to form a triangle shape, and is used to position and clamp the middle vertical plate of the third I-beam 61 .

[0069] A section of the bottom horizontal plate at both ends of the third I-beam 61 is cut off, and the middle vertical plate above the cut bottom horizontal plate portion of the third I-beam 61 is inserted between the triangular positioning plates 83 during installation, and the top horizontal plate of the third I-beam 61 is placed on the triangular positioning plates 83.

[0070] The bottom corners of the middle vertical plates at both ends of the third I-beam 61 are cut to form wedge blocks 63, and the interior of the extended supporting plate 82 is provided with a slot 84 adapted to the wedge block 63. The wedge block 63 is inserted into the slot 84 to limit the third I-beam 61 from sliding off the extended supporting plate 82.

[0071] A connecting plate 85 is fixed between the bottom of the supporting plates 82 extending on both sides of the secondary node 8 by bolts, and studs are welded through the bottom horizontal plate of the second I-beam 51 and on both sides of the middle vertical plate, and the bottom ends of the studs penetrate the connecting plate 85 and are locked by nuts. The two studs are offset in the length direction of the second I-beam 51, so that the two screw holes in the middle of the connecting plate 85 are staggered, thereby preventing the connecting plate 85 from being easily bent or even broken in the middle.

[0072] Between the square frame formed by the concrete cross beam 4 and the concrete longitudinal beam 5, the secondary node 8 is used to further connect the concrete secondary beam 6, which can improve the density of the overall frame. The positioning groove 44 reserved on the concrete cross beam 4 during pouring can also locate the installation spacing of the concrete secondary beam 6; and when the secondary node 8 is connected to the third I-beam 61 of the concrete secondary beam 6, the side and bottom of the secondary node 8 are bent to form an extended supporting plate 82 and a triangular positioning plate 83. On the one hand, the two can be used to support the third I-beam 61, and at the same time, the triangular positioning plate 83 can also locate the middle vertical plate of the third I-beam 61 to prevent deviation. The wedge block 63 reserved when the bottom of the third I-beam 61 is cut can also hook the card groove 84 on the extended supporting plate 82 to improve the tensile strength, and then the two ends of the inverted U-shaped steel sleeve 81 are connected at the bottom with bolts, and the concrete secondary beam 6 and the third I-beam 61 are connected at the same time. While the third I-beam 61 on both sides is more stably connected, the pressure can be further dispersed to the concrete secondary beam 6, thereby improving the overall force strength.

[0073] In summary, the connection ends of the steel structure of the present invention only need to be processed by simple cutting, drilling, etc., which fully utilizes the inherent strength of the steel structure, can achieve a relatively stable and firm connection, and the installation method is simpler and faster, which effectively improves the construction efficiency compared to direct welding.

[0074] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0075] During the construction, first fix the precast concrete columns 1 of the first layer on the foundation, then put the main nodes 7 on each precast concrete column 1, and then connect the concrete cross beams 4 and the concrete longitudinal beams 5 between adjacent main nodes 7 to form a square frame. In this process, the ends of the first I-beam 41 and the second I-beam 51 are butted through the inclined surface on the side connecting I-beam 72 of the main node 7, and the convex block 43 is stuck in the positioning groove 74 to achieve positioning and alignment. Then, insert the U-shaped steel 73 on both sides, and use bolts to lock the U-shaped steel 73, the side connecting I-beam 72 and the first I-beam 41 or the second I-beam 51, and then the concrete cross beam 4 and the concrete longitudinal beam 5 can be fixed well.

[0076] After the square frame is built, build the concrete secondary beams 6 between the concrete cross beams 4. First, buckle the inverted U-shaped steel sleeve 81 of the secondary node 8 into the positioning groove 44 of the concrete cross beam 4, then put the third I-beam 61 of the concrete secondary beam 6 on the inverted U-shaped steel sleeve 81, and make the wedge block 63 insert into the card slot 84 to complete the preliminary fixation. Then, fix the upper connecting plate 85 at the bottom, and synchronously connect the two ends of the inverted U-shaped steel sleeve 81 and the third I-beam 61 on both sides by tension.

[0077] After the first layer is built, insert the precast concrete columns 1 of the second layer into the main nodes 7, and rotate the precast concrete columns 1 of this layer 90° to cross-connect with the precast concrete columns 1 of the lower layer. Before completely putting down the precast concrete columns 1, first fill the concrete in the sleeve 71, and then put down the precast concrete columns 1. After the concrete solidifies, it can be fixed more firmly, and then repeat the above-mentioned steps for building the frame.

[0078] After the overall frame is built, splice and lay the non-reinforced composite slab 2 on the concrete cross beam 4, the concrete longitudinal beam 5 and the concrete secondary beam 6, and finally lay the concrete pavement 3 on it.

[0079] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device.

[0080] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled concrete industrial building structure, including multi-layer laminates, and each layer of laminates is connected and supported by precast concrete columns, characterized in that: The laminated board includes a framework built by a concrete steel structure and a paving structure laid on the top of the framework. The framework includes concrete cross beams, concrete longitudinal beams and concrete secondary beams. The concrete cross beams, concrete longitudinal beams and precast concrete columns are perpendicularly connected to each other through main joints. Two concrete cross beams and two concrete longitudinal beams are spliced to form a square framework. A plurality of concrete secondary beams are distributed in parallel between the square frameworks, and both ends of the concrete secondary beams are lap-mounted on the concrete cross beams through secondary joints. The main joints and secondary joints are detachably connected to the concrete cross beams, concrete longitudinal beams and precast concrete columns.

2. The prefabricated concrete industrial building structure according to claim 1, wherein: The concrete cross beam is composed of a first I-beam and a first concrete square column cast outside it; The concrete longitudinal beam is composed of a second I-beam and a second concrete square column cast outside it; The concrete secondary beam is composed of a third I-beam and a third concrete square column cast outside it; The precast concrete column is composed of a fourth I-beam and a fourth concrete square column cast outside it; The ends of the first I-beam, second I-beam, third I-beam and fourth I-beam symmetrically extend out of the first concrete square column, second concrete square column, third concrete square column and fourth concrete square column respectively.

3. The prefabricated concrete industrial building structure according to claim 2, wherein: The main joint includes: A sleeve, sleeved on the end of the precast concrete column to connect the upper and lower precast concrete columns; Side connecting I-beams, welded around the sleeve for connecting the concrete cross beam and the concrete longitudinal beam; The ends of the first I-beam and the second I-beam and the ends of the side connecting I-beams are all set as matching inclined planes, so that the first I-beam and the second I-beam are placed on the side connecting I-beams through the inclined planes. U-shaped steel is clamped into the sides of the first I-beam, the second I-beam and the side connecting I-beam for bolt connection. Positioning convex blocks are extended and provided at the tops of the end faces of the first I-beam and the second I-beam, and positioning grooves adapted to the positioning convex blocks are opened at the tops of the end faces of the side connecting I-beams.

4. The prefabricated concrete industrial building structure according to claim 3, wherein: The length of the end of the fourth I-beam extending out of the fourth concrete square column is the same as the depth of the sleeve. A notch with a length of half of the depth of the sleeve is opened at the end of the middle steel plate of the fourth I-beam, and the width of the notch is the same as the thickness of the middle steel plate of the fourth I-beam. When the upper and lower precast concrete columns are connected, they are twisted 90° to each other along the vertical axis, so that the notches of the upper and lower fourth I-beams are inserted into each other.

5. The prefabricated concrete industrial building structure according to claim 4, wherein: When the fourth I-beams of the upper and lower precast concrete columns are inserted into the sleeve, concrete is filled in the sleeve, and a through groove is opened in the middle steel plate of the fourth I-beam to increase the connection strength of the concrete.

6. The prefabricated concrete industrial building structure according to claim 2, wherein: The secondary joint includes: An inverted U-shaped steel sleeve, which is buckled on the concrete cross beam, and a plurality of positioning grooves adapted to the inverted U-shaped steel sleeve and equidistant are opened on the first concrete square column of the concrete cross beam; An extended supporting plate, formed by horizontally bending both ends of the inverted U-shaped steel sleeve to both sides, for supporting the third I-beam; A triangular positioning plate, formed by extending and bending both sides of each side plate of the inverted U-shaped steel sleeve to the outside to form a triangle, for positioning and clamping the middle vertical plate of the third I-beam.

7. The prefabricated concrete industrial plant structure according to claim 6, characterized in that: A section of the bottom cross plates at both ends of the third I-beam is cut off. When the middle vertical plate above the part of the third I-beam where the bottom cross plate is cut off is installed, it is inserted between the triangular positioning plates, and the top cross plate of the third I-beam is placed on the triangular positioning plates.

8. A prefabricated concrete industrial building structure according to claim 6, characterized in that: Wedges are formed by cutting the bottom corners of the middle vertical plates at both ends of the third I-beam. A clamping groove adapted to the wedge is formed inside the extended supporting plate. The third I-beam is restricted from sliding off the extended supporting plate by inserting the wedge into the clamping groove.

9. The precast concrete industrial building structure according to claim 6, characterized in that: A connecting plate is fixed by bolts between the bottoms of the extended supporting plates on both sides of the secondary joint. Studs are welded through the bottom cross plate of the second I-beam and on both sides of the middle vertical plate, and the bottom ends of the studs penetrate through the connecting plate and are locked by nuts.

10. The prefabricated concrete industrial building structure according to claim 1, characterized in that: The paving structure includes a non-reinforced composite slab spliced and laid on the top of the frame, and a concrete paving is poured on the top of the non-reinforced composite slab.

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