Fabricated building structure and construction method thereof

Abstract

The invention provides an assembly type building structure and a construction method thereof, the assembly type building structure comprises a prefabricated column, a composite beam and a composite plate, the composite beam comprises a composite beam prefabricated part and a composite beam cast-in-place part, and the composite plate comprises a composite plate prefabricated part and a composite plate cast-in-place part; the prefabricated column is provided with a first supporting structure used for supporting the laminated beam prefabricated part, and the laminated beam prefabricated part is provided with a second supporting structure used for supporting the laminated slab prefabricated part. In the invention, the composite beam prefabricated part is supported by the first supporting structure on the prefabricated column, the composite slab prefabricated part is supported by the second supporting structure on the composite beam prefabricated part, and the composite beam cast-in-place part and the composite slab cast-in-place part are integrally cast above the composite beam prefabricated part and the composite slab prefabricated part in situ; the fabricated building structure is suitable for construction of large-span fabricated building superposed beams and slabs, support-free construction is achieved, the cost of supporting materials is saved, and the work of building supports is omitted.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and more specifically, to a prefabricated building structure and a construction method thereof. Background Art

[0002] In the past, the construction industry mainly used on-site scaffolding, formwork, steel bar tying, and concrete pouring, which were labor-intensive, with high loss of building materials, chaotic on-site, and a lot of solid waste. With the vigorous promotion of prefabricated buildings in my country's construction industry, the proportion of prefabricated concrete component prefabrication construction has gradually increased due to its low environmental pollution and fast construction speed. At present, the horizontal components of concrete prefabricated projects generally still use full-frame support and independent support technology, and the joints are connected in the form of cast-in-place concrete joints. The construction cost is high, the degree of standardization is low, and the supporting technology is incomplete. Compared with the cast-in-place method, the advantages of prefabricated construction are difficult to reflect, and the support-free technology of prefabricated buildings needs to be improved urgently. Summary of the invention

[0003] In order to overcome at least one defect of the above-mentioned prior art, the present invention provides a prefabricated building structure and a construction method thereof, which is suitable for the construction of composite beams and slabs of large-span prefabricated buildings, and realizes support-free construction, which not only saves the cost of support materials but also eliminates the work of building supports.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows: A first aspect of the present invention provides an assembled building structure, comprising prefabricated columns, composite beams and composite slabs, wherein the composite beams comprise a prefabricated portion of the composite beams and a cast-in-place portion of the composite beams, and the composite slabs comprise a prefabricated portion of the composite slabs and a cast-in-place portion of the composite slabs; the prefabricated columns are provided with a first supporting structure for supporting the prefabricated portion of the composite beams, and the prefabricated portion of the composite beams is supported on the prefabricated columns through the first supporting structure; the prefabricated portion of the composite beams is provided with a second supporting structure for supporting the prefabricated portion of the composite slabs, and the prefabricated portion of the composite slabs is supported on the prefabricated portion of the composite beams through the second supporting structure; the cast-in-place portion of the composite beams and the cast-in-place portion of the composite slabs are integrally cast on-site above the prefabricated portion of the composite beams and the prefabricated portion of the composite slabs.

[0005] Furthermore, a cavity is provided inside the prefabricated column, and the cavity is filled with grouting on site.

[0006] Furthermore, the first supporting structure is a steel corbel, and the prefabricated columns on the sides of the steel corbel are also provided with reinforcing side panels.

[0007] Furthermore, the prefabricated part of the composite beam is pre-embedded with a plurality of connecting bolts extending out of its bottom surface, and the connecting bolts are used to connect the transverse rigidity reinforcement channel steel.

[0008] Furthermore, the second supporting structure includes an upper fixing plate and a lower fixing plate, the upper fixing plate is fixedly connected to the bottom of the prefabricated part of the composite plate, the upper fixing plate also has a plurality of guide columns extending downward, the lower fixing plate is provided with a plurality of through holes corresponding to the guide columns, a rubber pad is provided between the upper fixing plate and the lower fixing plate, the second supporting structure also includes a connecting plate, the connecting plate is fixed to the side of the prefabricated part of the composite beam by bolts, the connecting plate is perpendicular to and fixedly connected to the lower fixing plate, an inclined supporting plate is provided between the connecting plate and the lower fixing plate, and an adjusting bolt for adjusting the distance between the upper fixing plate and the lower fixing plate is provided between the upper fixing plate and the lower fixing plate.

[0009] Furthermore, the upper fixing plate and the lower fixing plate are both rectangular plate structures.

[0010] Furthermore, an inclined support plate is provided between the connecting plate and the lower fixing plate.

[0011] A second aspect of the present invention provides a construction method of the prefabricated building structure, the method comprising the following steps: S1: Installation of prefabricated columns: Prefabricated columns are sent to the site after being inspected and qualified. They are temporarily fixed after being hoisted into place. Prefabricated columns are grouted. After the grouting is completed, bolts can be used to connect the prefabricated columns and steel corbels. Steel corbels with reinforced side plates on both sides are installed at the designed position. The reinforced side plates are used to fix the beam position and control the axis positioning. The two leveling bolts at the bottom of the steel corbel are adjusted to adjust the elevation of the corbel support surface to keep it consistent with the elevation of the beam bottom. The bolts are tightened to ensure that they will not loosen. S2: Installation of prefabricated composite beams: The prefabricated composite beams are hoisted in the order of hoisting the main beams first and then the secondary beams. The prefabricated composite beams are placed on the steel brackets with the support surface adjusted. After they are in place, the diagonal lines are measured for verification. After the prefabricated composite beams are hoisted, the side plate bolts are used to fix them to prevent the beams from being displaced or tilted, and the steel brackets are fine-tuned to improve the positioning accuracy of the prefabricated beams. At the same time, the connecting plates of the plurality of second supporting structures are supported on the side of the prefabricated part of the composite beam, and the distance between the upper fixing plate and the lower fixing plate is adjusted by adjusting the bolts so that the upper end surface of the upper fixing plate is flush with the upper end surface of the prefabricated part of the composite beam; S3: Installation of prefabricated parts of composite panels: a number of transverse stiffness reinforcement channel steels are added at the bottom of each prefabricated part of composite panels, and the transverse stiffness reinforcement channel steels are connected through the pre-buried connection bolts of the prefabricated beam part; the prefabricated parts of composite panels are hoisted to the top of the prefabricated beam part and the second supporting structure by using a balanced hanger; the prefabricated parts of composite panels are connected by close seams, and for the joints at the top of the prefabricated parts of composite panels, the damage of the joints is reduced by cutting the corners, and then additional anti-cracking steel bars are set above the joints of the prefabricated parts of composite panels to prevent cracking, and the joints are filled with expansive cement mortar to prevent shrinkage, and waterproof powder is added to prevent leakage, and the filling materials are compacted and filled twice; for the joints at the bottom of the prefabricated parts of composite panels, a layer of fiber mesh cloth is pasted at the joint position, and then putty is applied; S4: Concrete pouring: After the prefabricated part of the composite slab is installed, the steel bars are tied on site, and then the concrete is poured. The cast-in-place part of the composite beam and the cast-in-place part of the composite slab are integrally poured on site above the prefabricated part of the composite beam and the prefabricated part of the composite slab; after the pouring is completed, the concrete is watered and cured; S5: Disassembly of traversable components: After the construction and maintenance of cast-in-place concrete is completed, the second supporting structure, the transverse stiffness reinforcement channel steel at the bottom of the prefabricated part of the composite slab, and the steel corbel reinforcement side panels on the prefabricated columns are disassembled.

[0012] Furthermore, in step S3, a first transverse stiffness reinforcement channel steel is arranged 1.1 m from the bottom edge of the prefabricated part of the composite slab, and then an additional transverse stiffness reinforcement channel steel is arranged every 1.7 m.

[0013] Furthermore, in step S3, the edge of the prefabricated part of the composite plate extends into the prefabricated part of the composite beam by 10 mm to achieve seamless connection between the plate and the beam.

[0014] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: the present invention provides an assembled building structure and a construction method thereof, wherein the assembled building structure comprises prefabricated columns, composite beams and composite slabs, wherein the composite beams comprise a prefabricated portion of a composite beam and a cast-in-place portion of a composite beam, and the composite slabs comprise a prefabricated portion of a composite slab and a cast-in-place portion of a composite slab; the prefabricated columns are provided with a first supporting structure for supporting the prefabricated portion of the composite beam, and the prefabricated portion of the composite beam is supported on the prefabricated columns through the first supporting structure, and the prefabricated portion of the composite beam is provided with a second supporting structure for supporting the prefabricated portion of the composite slab, and the prefabricated portion of the composite slab is supported on the prefabricated portion of the composite beam through the second supporting structure; the cast-in-place portion of the composite beam and the cast-in-place portion of the composite slab are integrally cast on-site above the prefabricated portion of the composite beam and the prefabricated portion of the composite slab. In the present invention, the prefabricated part of the composite beam is supported by the first supporting structure on the prefabricated column, and the prefabricated part of the composite slab is supported by the second supporting structure on the prefabricated part of the composite beam. The cast-in-place part of the composite beam and the cast-in-place part of the composite slab are integrally cast on site above the prefabricated part of the composite beam and the prefabricated part of the composite slab. The prefabricated building structure is suitable for the construction of large-span prefabricated building composite beams and slabs, realizing support-free construction, which not only saves the cost of support materials but also eliminates the work of building supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side schematic diagram of a prefabricated column in an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of a prefabricated column from another perspective in an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the second supporting structure in an embodiment of the present invention.

[0018] Figure 4 It is a side schematic diagram of the prefabricated part of the composite plate and the second supporting structure in an embodiment of the present invention.

[0019] Figure 5 It is a schematic diagram of another perspective of the prefabricated part of the composite plate and the second supporting structure in an embodiment of the present invention.

[0020] Figure 6 It is a schematic diagram of the prefabricated building structure before casting in an embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of the assembled building structure after casting in an embodiment of the present invention.

[0022] Figure 8 It is an overall schematic diagram of the prefabricated building structure in an embodiment of the present invention.

[0023] Fig. 9 It is a flow chart of the construction method of the prefabricated building structure in an embodiment of the present invention.

[0024] Fig.10 Schematic diagram of a composite plate in an embodiment of the present invention.

[0025] Among them: 1. Prefabricated column; 101. First supporting structure; 201. Prefabricated part of composite beam; 202. Cast-in-place part of composite beam; 301. Prefabricated part of composite slab; 302. Cast-in-place part of composite slab; 303. Anti-cracking steel bar; 304. Expansive cement mortar; 305. Fiber mesh cloth; 4. Second supporting structure; 401. Upper fixing plate; 402. Lower fixing plate; 403. Guide column; 404. Rubber pad; 405. Connecting plate; 406. Adjusting bolt; 407. Oblique supporting plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Example 1

[0028] like Figure 1-8As shown, this embodiment provides an assembled building structure, including a prefabricated column 1, a composite beam and a composite slab, the composite beam including a composite beam prefabricated part 201 and a composite beam cast-in-place part 202, the composite slab including a composite slab prefabricated part 301 and a composite slab cast-in-place part 302; the prefabricated column 1 is provided with a first supporting structure 101 for supporting the prefabricated part 201 of the composite beam, the prefabricated part 201 of the composite beam is supported on the prefabricated column 1 through the first supporting structure 101, the prefabricated part 201 of the composite beam is provided with a second supporting structure 4 for supporting the prefabricated part 301 of the composite slab, the prefabricated part 301 of the composite beam is supported on the prefabricated part 201 of the composite slab through the second supporting structure 4; the cast-in-place part 202 of the composite beam and the cast-in-place part 302 of the composite slab are integrally cast on site above the prefabricated part 201 of the composite beam and the prefabricated part 301 of the composite slab.

[0029] In this embodiment, the prefabricated part 201 of the composite beam is supported by the first supporting structure 101 on the prefabricated column 1, and the prefabricated part 301 of the composite slab is supported by the second supporting structure 4 on the prefabricated part 201 of the composite beam. The cast-in-place part 202 of the composite beam and the cast-in-place part 302 of the composite slab are integrally cast on site above the prefabricated part 201 of the composite beam and the prefabricated part 301 of the composite slab. This prefabricated building structure is suitable for the construction of large-span prefabricated building composite beams and slabs, realizing support-free construction, which not only saves the cost of support materials but also eliminates the work of building supports.

[0030] In the specific implementation process, a cavity is provided inside the prefabricated column 1, and the cavity is filled with grouting on site.

[0031] In a specific implementation process, the first supporting structure 101 is a steel corbel.

[0032] In a specific implementation process, the composite beam prefabricated part 201 is pre-embedded with a plurality of connecting bolts extending out of its bottom surface, and the connecting bolts are used to connect the transverse rigidity reinforcement channel steel.

[0033] In the specific implementation process, the second supporting structure 4 includes an upper fixing plate 401 and a lower fixing plate 402, the upper fixing plate 401 is fixedly connected to the bottom of the composite plate prefabricated part 301, the upper fixing plate 401 also extends downwardly with a plurality of guide columns 403, the lower fixing plate 402 is provided with a plurality of through holes corresponding to the guide columns 403, a rubber pad 404 is provided between the upper fixing plate 401 and the lower fixing plate 402, the second supporting structure 4 also includes a connecting plate 405, the connecting plate 405 is fixed to the side of the composite beam prefabricated part 201 by bolts, the connecting plate 405 is perpendicular and fixedly connected to the lower fixing plate 402, an inclined supporting plate 406 is provided between the connecting plate 405 and the lower fixing plate 402, and an adjusting bolt 406 for adjusting the distance between the upper fixing plate 401 and the lower fixing plate 402 is provided between the upper fixing plate 401 and the lower fixing plate 402.

[0034] In a specific implementation process, the upper fixing plate 401 and the lower fixing plate 402 are both rectangular plate structures.

[0035] In a specific implementation process, an inclined support plate (407) is further provided between the connecting plate (405) and the lower fixing plate (402). Example 2

[0036] like Figure 9-10 As shown, this embodiment provides a construction method of the prefabricated building structure described in Embodiment 1, and the method comprises the following steps: S1: Installation of precast column 1: Precast column 1 is sent to the site after passing the inspection. It is temporarily fixed after being hoisted into place. Precast column 1 is grouted. After the grouting is completed, bolts can be used to connect precast column 1 and steel corbels. Steel corbels with reinforced side plates on both sides are installed at the designed position. The reinforced side plates are used to fix the beam position and control the axis positioning. The two leveling bolts at the bottom of the steel corbel are adjusted to adjust the elevation of the corbel support surface to keep it consistent with the elevation of the beam bottom. The bolts are tightened to ensure that they will not loosen. S2: Installation of the prefabricated part 201 of the composite beam: hoist the prefabricated part 201 of the composite beam in the order of hoisting the main beam first and then the secondary beam, place the prefabricated part 201 of the composite beam on the steel bracket with the support surface adjusted, and measure the diagonal for verification after it is in place; after the prefabricated part 201 of the composite beam is hoisted, use the reinforced side plate bolts to fix it to prevent the beam from deflecting or tilting, and make fine adjustments to the steel bracket to improve the positioning accuracy of the prefabricated beam; after confirmation, tighten the bolts, and each bolt must be tightened and not loose. The prefabricated beam component has a long span and is easy to tip over. The hook can only be removed after it is confirmed to be in place and fixed.

[0037] At the same time, the connecting plates 405 of the plurality of second supporting structures 4 are supported on the side of the composite beam prefabricated part 201, and the distance between the upper fixing plate 401 and the lower fixing plate 402 is adjusted by adjusting the bolts 406 so that the upper end surface of the upper fixing plate 401 is flush with the upper end surface of the composite beam prefabricated part 201; S3: Installation of the composite plate prefabricated part 301: A plurality of transverse rigidity reinforcement channel steels are added at the bottom of each composite plate prefabricated part 301, and the transverse rigidity reinforcement channel steels are connected through the pre-buried connection bolts of the composite beam prefabricated part 201; Before hoisting, the quality of the prefabricated part 301 of the composite plate is re-inspected and accepted, and the elevation of the board surface, the installation direction, etc. are confirmed with the construction personnel. The slings and shackles must meet the safety requirements of hoisting and be free of cracks. The hoisting team should check the hoisting equipment and replace the damaged hoisting equipment. A balanced hanger is used for hoisting. Nine lifting points are reserved on the prefabricated part 301 of the composite plate, and the prefabricated part 301 of the composite plate is hoisted to the top of the prefabricated part 201 of the composite beam and the second supporting structure 4; during the hoisting process, a combination of pulleys and wire ropes is used to ensure that each lifting point is balanced and stable, and to ensure that no concentrated stress is generated during the hoisting process to avoid cracking; during the hoisting process, in order to prevent the prefabricated part 301 of the composite plate from being damaged during installation due to wind force and large adjustment range of the crane, a cable wind rope is tied at the end of each board to control the trajectory of the prefabricated part 301 of the composite plate in the air.

[0038] The construction sequence of the prefabricated part 301 of the composite slab is from west to east. When hoisting the prefabricated part 301 of the composite slab, it should be placed steadily to avoid vibration and swing. The sling can be loosened only after the slab is tightened. The prefabricated parts 301 of the composite slab are connected with tight seams, without the need for additional formwork and support, and without the risk of leakage and mold expansion. For the joints at the top of the prefabricated part 301 of the composite slab, the damage of the joints is reduced by cutting the corners, and then additional anti-cracking steel bars 303 are set above the joints of the prefabricated part 301 of the composite slab to prevent cracking, and the joints are filled with expansive cement mortar 304 to prevent shrinkage, and 5% waterproof powder is added to prevent leakage. The filling materials are compacted and filled twice; For the bottom joint of the prefabricated part 301 of the composite board, a layer of 100 mm wide fiber mesh cloth 305 is pasted at the joint position, and then putty is applied.

[0039] S4: Concrete pouring: After the installation of the prefabricated part 301 of the composite slab is completed, the on-site reinforcement is tied and accepted in accordance with relevant specifications. After a comprehensive inspection and correction of the verticality of all wall columns, beam positions, and slab bottom elevations, the concrete pouring can be carried out. The cast-in-place part 202 of the composite beam and the cast-in-place part 302 of the composite slab are integrally cast on-site above the prefabricated part 201 of the composite beam and the prefabricated part 301 of the composite slab; the layered pouring is adopted, and the pouring height of each layer should not be too high to avoid load concentration. For the thicker composite layer, it is advisable to use a vibrating rod to vibrate along the pouring direction, and strengthen the vibration in the beams, walls and other parts with dense steel bars. After the pouring is completed, the concrete is watered and cured, and the curing time is no less than 7 days.

[0040] S5: Dismantling of traversable components: After the cast-in-place concrete construction and curing are completed, the second supporting structure 4, the transverse rigidity reinforcement channel steel at the bottom of the prefabricated part 301 of the composite slab, and the steel bracket reinforcement side plate on the prefabricated column 1 are dismantled. A movable scaffolding is set up on the lower floor, and the construction workers stand on the scaffolding to remove the fixing bolts on the steel bracket reinforcement side plate to complete the dismantling.

[0041] In the specific implementation process, in step S3, the first transverse stiffness reinforcement channel steel is set 1.1m from the bottom edge of the prefabricated part 301 of the composite plate, and then a transverse stiffness reinforcement channel steel is added every 1.7m. The transverse stiffness reinforcement channel steel cannot be removed during the hoisting process to prevent cracking of the bottom of the plate.

[0042] In the specific implementation process, in step S3, the edge of the composite plate prefabricated part 301 extends into the composite beam prefabricated part 201 by about 10 mm to achieve seamless connection between the plate and the beam. This achieves support-free and improves construction efficiency. The composite plate prefabricated part 301 does not need to extend the steel bars, which also makes the surrounding steel bar binding simpler and more convenient.

[0043] The construction quality control requirements of this embodiment are as follows: 1. The thickness of the post-cast concrete superposition layer of the composite beam should not be less than 100mm, and the concrete strength grade should not be lower than C30. The stirrups of the precast beam should all extend into the superposition layer, and the length of the straight section of each limb extending into the superposition layer should not be less than 10d, where d is the diameter of the stirrup. The top surface of the precast beam should be made into a rough surface with a concave-convex difference of not less than 6mm.

[0044] 2. At the junction of the plate and the beam, the plate must extend into the beam by 10 mm to achieve a seamless connection.

[0045] 3. The thickness of the composite layer of the composite slab should not be less than 40mm, and the concrete strength grade should not be lower than C25. The surface of the precast slab should be made into a rough surface with a concave-convex difference of not less than 4mm.

[0046] 4. The end of the steel bar is anchored in the form of an anchor plate, and the exposed length of the anchor thread shall not exceed 1.5 teeth.

[0047] 5. When lifting the beam, use a sling to hook the lifting ring of the shoulder pole beam. The sling should be long enough to ensure that the angle between the sling and the shoulder pole beam is not less than 60°.

[0048] 6. The position and size allowable deviations and inspection methods of prefabricated structural components are shown in Table 1. When the verticality deviation is small, it can be corrected by striking wedges. When the verticality deviation is large, it can be corrected by using a jack.

[0049] Table 1 Permissible deviations and inspection methods for position and size of prefabricated structural components

[0050] Construction quality assurance measures of this embodiment: 1. The quality and quality of materials must be strictly controlled during the production of prefabricated columns, beams, slabs and components to ensure that the structure after construction is strong and durable.

[0051] 2. Prefabricated components should be protected from damage or distortion such as collision, friction, extrusion, etc. during transportation and handling. Attention should also be paid during on-site installation and assembly to avoid deformation or damage of components due to operational errors. The fulcrums must be in close and stable contact.

[0052] 3. Reinforced concrete components must be tested for bearing capacity, deflection and crack width.

[0053] 4. Strictly control the quality of commercial concrete and accurately provide the order form for commercial concrete. Strictly implement the concrete mix ratio standard and control the slump of concrete. It is required that the commercial concrete be delivered and transported in time and that the concrete does not segregate.

[0054] 5. Use a car pump to pour concrete. Start pouring from one side along the span of the floor slab and proceed in sequence. Avoid excessive accumulation of concrete at the same location to damage the box formwork, and try to spread the concrete evenly.

[0055] 6. The column strength must reach 100% of the design strength before it can be hoisted. Before hoisting, demould it first, and then use a crane to hoist it to demould it and turn it over at the reserved hoisting ring of the column. Then, use 60×90 wood to cushion it. After hoisting, support the fulcrum, and then use a wire rope to tie the bottom of the corbel at 1 / 3 of the distance from the top of the column, and then hoist it.

[0056] 7. Ensure the density of concrete in the composite beam groove and at the joints between beams, and deal with it in time if formwork leakage is found.

[0057] 8. Strengthen the inspection of the position and size of embedded parts to ensure that the position of embedded parts is correct and flat without any errors or omissions.

[0058] 9. During the hoisting process, in order to prevent the board from being damaged during installation due to wind force and large adjustment range of the crane, a cable wind rope is tied at the end of each board to control the trajectory of the three-rib board in the air. The horizontal angle of the sling should not be less than 60° and should not be less than 45°.

[0059] 10. The channel steel added at the bottom of the slab must be removed only after the construction of the cast-in-place concrete layer is completed to avoid bottom cracking during transportation and construction, which will affect the quality of the project.

[0060] Compared with traditional processes, the design of the present invention improves prefabricated components and simplifies the operating process. Through standardized and modular design, the operating process is simplified, the labor intensity is reduced, the construction period is shortened, the amount of on-site welding work is reduced, and the pollution and safety risks caused by welding are reduced. It has a high reference value in similar projects.

[0061] This technology has been successfully applied to the relocation and construction of a comprehensive building for the Central Hospital of Dahuai Town, Enping City, one stadium, one museum and one center in Jiaoling County, and the new construction projects of the Enping City Library and Museum. It has a high promotion and application value for the construction of composite beams and slabs of similar prefabricated buildings.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled building structure, characterized in that: The invention comprises a prefabricated column (1), a composite beam and a composite slab, wherein the composite beam comprises a prefabricated composite beam portion (201) and a cast-in-place composite beam portion (202), and the composite slab comprises a prefabricated composite slab portion (301) and a cast-in-place composite slab portion (302); the prefabricated column (1) is provided with a first supporting structure (101) for supporting the prefabricated composite beam portion (201), and the prefabricated composite beam portion (201) is supported on the prefabricated composite beam portion by the first supporting structure (101). On the column (1), the prefabricated composite beam part (201) is provided with a second support structure (4) for supporting the prefabricated composite slab part (301); the prefabricated composite slab part (301) is supported on the prefabricated composite beam part (201) via the second support structure (4); the cast-in-place composite beam part (202) and the cast-in-place composite slab part (302) are integrally cast on site above the prefabricated composite beam part (201) and the prefabricated composite slab part (301).

2. The assembled building structure according to claim 1, characterized in that: The prefabricated column (1) is provided with a cavity inside, and the cavity is filled with grouting on site.

3. The assembled building structure according to claim 2, characterized in that: The first supporting structure (101) is a steel corbel, and the prefabricated columns (1) on the sides of the steel corbel are also provided with reinforcing side panels.

4. The assembled building structure according to claim 3, characterized in that: The composite beam prefabricated part (201) is pre-buried with a plurality of connecting bolts extending out of its bottom surface, the connecting bolts being used to connect transverse rigidity reinforcement channel steels.

5. The assembled building structure according to claim 4, characterized in that: The second supporting structure (4) comprises an upper fixing plate (401) and a lower fixing plate (402), wherein the upper fixing plate (401) is fixedly connected to the bottom of the composite beam prefabricated part (301), the upper fixing plate (401) also extends downwardly with a plurality of guide columns (403), the lower fixing plate (402) is provided with a plurality of through holes corresponding to the guide columns (403), a rubber pad (404) is provided between the upper fixing plate (401) and the lower fixing plate (402), and the second supporting structure (4) further comprises a connecting plate (405), wherein the connecting plate (405) is fixed to the side of the composite beam prefabricated part (201) by bolts, the connecting plate (405) is vertically and fixedly connected to the lower fixing plate (402), and an adjusting bolt (406) for adjusting the distance between the upper fixing plate (401) and the lower fixing plate (402) is provided between the upper fixing plate (401) and the lower fixing plate (402).

6. The assembled building structure according to claim 5, characterized in that: The upper fixing plate (401) and the lower fixing plate (402) are both rectangular plate structures.

7. The assembled building structure according to claim 6, characterized in that: An oblique support plate (407) is also provided between the connecting plate (405) and the lower fixing plate (402).

8. A construction method of the prefabricated building structure according to claim 7, characterized in that: The method comprises the following steps: S1: Installation of precast columns: The precast columns (1) are sent to the site after being inspected and qualified. After being hoisted into place, they are temporarily fixed. The precast columns (1) are grouted. After the grouting is completed, the precast columns (1) and the steel brackets can be connected with bolts one day after the grouting is completed. The steel brackets with reinforced side plates on both sides are installed at the designed position. The reinforced side plates are used to fix the beam position and control the axis positioning. The two leveling bolts at the bottom of the steel bracket are adjusted to adjust the elevation of the bracket support surface to keep it consistent with the elevation of the beam bottom. The bolts are tightened to ensure that they will not loosen. S2: Installation of the prefabricated part of the composite beam: The prefabricated part of the composite beam (201) is hoisted in the order of first hoisting the main beam and then hoisting the secondary beam, and the prefabricated part of the composite beam (201) is placed on the steel bracket with the support surface adjusted. After it is in place, the diagonal is measured for verification; after the prefabricated part of the composite beam (201) is hoisted, it is fixed with reinforcing side plate bolts to prevent the beam body from deflecting or tilting, and the steel bracket is fine-tuned to improve the positioning accuracy of the prefabricated beam; At the same time, the connection plates (405) of the plurality of second support structures (4) are supported on the side of the prefabricated composite beam portion (201), and the distance between the upper fixing plate (401) and the lower fixing plate (402) is adjusted by adjusting the bolts (406) so that the upper end surface of the upper fixing plate (401) is flush with the upper end surface of the prefabricated composite beam portion (201); S3: Installation of the prefabricated composite plate parts: a plurality of transverse rigidity reinforcement channel steels are added at the bottom of each prefabricated composite plate part (301), and the transverse rigidity reinforcement channel steels are connected through the pre-buried connection bolts of the prefabricated composite beam part (201); the prefabricated composite plate parts (301) are hoisted to the top of the prefabricated composite beam part (201) and the second supporting structure (4) by using a balanced hanger; the prefabricated composite plate parts (301) are spliced ​​with tight seams between the prefabricated composite plate parts (301), and the prefabricated composite plate parts (301) are connected to the prefabricated composite beam part (201) by using a balanced hanger; the prefabricated composite plate parts (301) are spliced ​​with tight seams between the prefabricated composite plate parts (301); the prefabricated composite plate parts (301) are connected to the prefabricated composite beam part (201) by using a balanced hanger; ... The top joint of the prefabricated part (301) is cut to reduce the damage of the joint, and then an additional anti-cracking steel bar (303) is arranged above the joint of the prefabricated part (301) of the composite plate to prevent cracking, and the joint is filled with expansion cement mortar (304) to prevent shrinkage, and waterproof powder is added to prevent leakage, and the filling material is compacted and filled twice; for the bottom joint of the prefabricated part (301) of the composite plate, a layer of fiber mesh cloth (305) is attached to the joint position, and then putty is applied; S4: Concrete pouring: After the prefabricated part (301) of the composite slab is installed, the steel bars are tied on site, and then concrete is poured. The cast-in-place part (202) of the composite beam and the cast-in-place part (302) of the composite slab are integrally poured on site above the prefabricated part (201) of the composite beam and the prefabricated part (301) of the composite slab. After the pouring is completed, the concrete is watered and cured. S5: Disassembly of traversable components: After the cast-in-place concrete construction and curing are completed, the second support structure (4), the transverse stiffness reinforcement channel steel at the bottom of the prefabricated part (301) of the composite slab, and the steel bracket reinforcement side plate on the prefabricated column (1) are disassembled.

9. The construction method of the prefabricated building structure according to claim 8, characterized in that: In step S3, a first transverse stiffness reinforcement channel steel is arranged 1.1 m from the bottom edge of the prefabricated part (301) of the composite slab, and then an additional transverse stiffness reinforcement channel steel is arranged every 1.7 m.

10. The construction method of the prefabricated building structure according to claim 8, characterized in that: In step S3, the edge of the prefabricated part (301) of the composite plate extends into the prefabricated part (201) of the composite beam by 10 mm to achieve seamless connection between the plate and the beam.

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