A fabricated building frame

Abstract

The application provides an assembled building frame, and mainly relates to the technical field of assembled building. The assembled building frame comprises a support column, a connecting piece, a cross beam, a connecting cover and a locking piece. The connecting piece is insertedly arranged on the top of the support column. The connecting piece is insertedly arranged on the side of the cross beam. A plurality of cross beams can be fixedly connected to the support column through the connecting piece. The locking piece is arranged in the connecting piece. The connecting cover is fixedly arranged on the outside of the connecting piece and is fixedly connected with the locking piece through bolts. Horizontal reinforcing ribs are arranged between two adjacent cross beams arranged by the connecting piece. Three-dimensional reinforcing ribs are arranged between the cross beam and the support column. The application has the beneficial effects that the installation and dismounting efficiency of the building frame can be effectively improved under the premise of ensuring the connection stability through the assembled frame structure. The dismounting process will not damage the parts, the repeated utilization rate of the parts is improved, the use cost is reduced, and the installation and dismounting construction safety is improved.

Description

Technical Field

[0001] This invention mainly relates to the field of prefabricated building technology, specifically a prefabricated building frame. Background Technology

[0002] In the field of prefabricated construction, temporary use scenarios such as temporary factories, temporary warehouses, and temporary office areas on construction sites have an extremely urgent need for building frames that can be "quickly assembled, efficiently dismantled, and reused." However, the design focus of existing prefabricated building frames is mostly biased towards long-term fixed use, making it difficult to adapt to the core requirements of temporary scenarios. The main problems are as follows: The dismantling process is inefficient and poorly adaptable: existing frames generally rely on a large number of bolts for fastening or on-site welding connections. During dismantling, bolts must be removed one by one. Some bolts are prone to rust and jamming after long-term use, which greatly increases the difficulty of dismantling. When the connecting parts exert shear stress on the bolts, the bolts are difficult to pull out and are prone to damage to the thread structure, making them unusable. Alternatively, the welded joints may need to be cut and separated, which not only consumes a lot of manpower and time, but also easily leads to deformation and damage of the parts due to improper operation. It is difficult to meet the timeliness requirements of "rapid evacuation and site clearance" in temporary scenarios. Low component reuse rate and serious cost waste: bolts are prone to stripping and thread damage during disassembly, and welding and cutting directly damage the component connection structure, resulting in most frame components being unusable after disassembly and having to be disposed of as waste. Temporary scenarios have a short service life for the frame, and frequent replacement of new components will significantly increase construction costs. The dismantling operation is complex and lacks safety: Welding and cutting require professional equipment and personnel, and there are safety hazards such as sparks and high temperatures. Especially in the complex environment of the construction site, it is easy to cause fires, burns and other risks. If the bolts are dismantled by force (such as when they are stuck by rust), the parts may suddenly fall off, which may cause injury or collision. Summary of the Invention

[0003] This invention aims to solve the problem of low assembly and disassembly efficiency in existing prefabricated building frames. Through this prefabricated frame structure, the installation and disassembly efficiency of building frames can be effectively improved while ensuring connection stability. The disassembly and assembly process will not damage the components, improve the reuse rate of components, reduce the cost of use, and improve the safety of installation and disassembly construction.

[0004] To achieve the above objectives, the present invention employs the following technical solution: A prefabricated building frame includes support columns, connectors, beams, connecting covers, and locking components. The connectors are inserted into the top of the support columns, and the beams are inserted into the sides of the connectors. Several beams can be fixedly connected to the support columns via the connectors. The locking components are installed in the connectors. The connecting covers are fixedly installed on the outside of the connectors and are bolted to the locking components. Horizontal reinforcing ribs are installed between adjacent beams installed with the connectors, and three-dimensional reinforcing ribs are installed between the beams and the support columns.

[0005] Furthermore, a fixing through hole is provided at the end of the support column, and a limiting block for the insertion depth of the support column and the crossbeam is provided in the connector.

[0006] Furthermore, the connector has a crossbeam insertion end on its side, and a support column insertion end on its top and bottom. A triangular reinforcing member is fixedly connected between the crossbeam insertion end and the support column insertion end. An external locking through hole is provided through the triangular reinforcing member and the crossbeam insertion end. An upper locking through hole and a lower locking through hole are provided through the triangular reinforcing member and the support column insertion end.

[0007] Furthermore, the end of the crossbeam is provided with an insertion tip, an inner locking hole is provided on the insertion tip near the end, and an outer locking hole is provided on the insertion tip away from the end.

[0008] Furthermore, the connecting cover structure includes an upper connecting cover and a lower connecting cover arranged opposite to each other. The upper connecting cover and the lower connecting cover have the same main structure. An outer locking rod is fixedly provided on the upper connecting cover, and an outer positioning hole adapted to the outer locking rod is provided on the lower connecting cover. The upper connecting cover and the lower connecting cover are adapted to the external shape of the connecting member and the triangular reinforcing member. The upper connecting cover and the lower connecting cover are provided with stepped holes for installing locking bolts. A filling block is provided on the side edge of the upper connecting cover and the lower connecting cover that are close to each other.

[0009] Furthermore, the locking component includes an upper locking component and a lower locking component. Both the upper and lower locking components have locking bolt holes on their sides. An inner locking rod is fixedly provided at the bottom of the upper locking component, and a lifting ring is fixedly provided at the top of the upper locking component. An inner positioning hole adapted to the inner locking rod is opened on the lower locking component, and a limiting end face is provided at the top of the lower locking component.

[0010] Compared with the prior art, the beneficial effects of the present invention are: Significantly improved dismantling efficiency, perfectly adapted to temporary scenarios: This invention adopts an "insert-type assembly + modular locking" design. Support columns, beams, and connectors are positioned through plug-in connections. Core fixation relies on the inner locking rod of the locking component and the outer locking rod of the connecting cover, requiring only a small number of locking bolts for reinforcement. During dismantling, there is no need for complex cutting or disassembling a large number of bolts one by one. Simply unscrew the locking bolts and separate the upper connecting cover and the upper locking component to quickly release the locking status of each component, achieving non-destructive separation of support columns, beams, and connectors. The entire dismantling process is shortened by more than 70% compared to traditional structures, enabling rapid site clearance and fully meeting the timeliness requirements of scenarios such as temporary factory buildings on construction sites.

[0011] High component reuse rate reduces temporary use costs: The plug-in connection and non-destructive locking structure avoids the thread damage caused by traditional bolt disassembly and the structural damage caused by welding and cutting. After the frame components (support columns, beams, connectors, locking components, etc.) are removed, they are free from deformation and damage and can be directly transported to the next temporary site for reassembly and use. The component reuse rate can reach more than 95%, which greatly reduces the frequency of component replacement in temporary scenarios and significantly reduces material procurement and construction costs.

[0012] The dismantling operation is simplified and the safety is significantly enhanced: the dismantling process does not require complex and high-risk operations such as welding and cutting, nor does it require violent dismantling of rusted parts. The locking bolts can be removed and the parts separated using only conventional tools. The operation steps are simple and easy to understand, and ordinary construction workers can complete the operation after simple training. It effectively avoids safety hazards such as high temperature, sparks, and parts falling off, and improves the safety and convenience of temporary scene dismantling operations.

[0013] Uncompromising structural stability while balancing temporary and safety requirements: While optimizing dismantling efficiency, this invention forms a multi-dimensional reinforcement system through triangular reinforcing members, horizontal reinforcing ribs, and three-dimensional reinforcing ribs, combined with an internal and external dual locking mechanism, to ensure that the frame has sufficient stability and load-bearing capacity during temporary use. It can stably withstand loads such as equipment stacking and personnel activities on the construction site, avoiding sacrificing structural safety for "temporary adaptation", and achieving dual protection of "efficient dismantling and construction" and "safe use". Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention; Figure 2 This is a schematic diagram of the overall second-view structure of the present invention; Figure 3 This is the present invention. Figure 1 A partially enlarged structural diagram of section A in the middle; Figure 4 This is the present invention. Figure 2 A partially enlarged structural diagram of section B in the middle; Figure 5This is a schematic diagram of the connection structure of the support column, connector and crossbeam of the present invention; Figure 6 This is an exploded view of the connection structure of the support column, connectors and crossbeams of the present invention; Figure 7 This is a first-view structural schematic diagram of the connector of the present invention; Figure 8 This is a second-view structural schematic diagram of the connector of the present invention; Figure 9 This is a schematic diagram of the locking component structure of the present invention; Figure 10 This is a schematic diagram of the locking component structure of the present invention.

[0015] The following are the labels shown in the attached diagram: 1. Support column; 2. Connector; 3. Crossbeam; 4. Connecting cover; 5. Locking component; 7. Horizontal reinforcing rib; 8. Three-dimensional reinforcing rib; 10. Fixing through hole; 21. Crossbeam insertion end; 22. Support column insertion end; 23. Triangular reinforcing component; 24. Outer locking through hole; 25. Upper locking through hole; 26. Lower locking through hole; 31. Insertion tip; 32. Inner locking hole; 33. Outer locking hole; 41. Upper connecting cover; 42. Lower connecting cover; 43. Outer locking rod; 44. Outer positioning hole; 45. Locking bolt mounting stepped hole; 46. Filler block; 50. Locking bolt hole; 51. Upper locking component; 52. Lower locking component; 53. Inner locking rod; 54. Lifting ring; 55. Inner positioning hole; 56. Limiting end face. Detailed Implementation

[0016] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0017] Combined with appendix Figures 1-10 A prefabricated building frame includes a support column 1, a connector 2, a crossbeam 3, a connecting cover 4, and a locking member 5. The connector 2 is inserted into the top of the support column 1, and the crossbeam 3 is inserted into the side of the connector 2. Several crossbeams 3 can be fixedly connected to the support column 1 through the connector 2. The locking member 5 is installed in the connector 2. The connecting cover 4 is fixedly installed on the outside of the connector 2 and is fixedly connected to the locking member 5 by bolts. A horizontal reinforcing rib 7 is installed between two adjacent crossbeams 3 installed by the connector 2, and a three-dimensional reinforcing rib 8 is installed between the crossbeam 3 and the support column 1.

[0018] The support column 1 has a fixed through hole 10 at its end, and the connector 2 has limiting blocks for the insertion depth of the support column 1 and the crossbeam 3. The crossbeam insertion end 21 has a limiting block for the insertion of the crossbeam 3, and the support column insertion end 22 has a limiting block for the insertion of the support column 1. The crossbeam 3 is an I-beam, which improves material utilization while meeting the support strength requirements.

[0019] The connector 2 has a crossbeam insertion end 21 on its side and support column insertion ends 22 on its top and bottom. A triangular reinforcing member 23 is fixedly connected between the crossbeam insertion end 21 and the support column insertion end 22. An external locking through hole 24 is formed through the triangular reinforcing member 23 and the crossbeam insertion end 21, and an upper locking through hole 25 and a lower locking through hole 26 are formed through the triangular reinforcing member 23 and the support column insertion end 22. The triangular reinforcing member 23 is welded between the crossbeam insertion end 21 and the support column insertion end 22.

[0020] The crossbeam 3 has an insertion tip 31 at one end, and an inner locking hole 32 is provided on the insertion tip 31 near the end, and an outer locking hole 33 is provided on the insertion tip 31 away from the end.

[0021] The connecting cover 4 structure includes an upper connecting cover 41 and a lower connecting cover 42 arranged opposite to each other. The upper connecting cover 41 and the lower connecting cover 42 have the same main structure. An outer locking rod 43 is fixedly provided on the upper connecting cover 41, and an outer positioning hole 44 adapted to the outer locking rod 43 is provided on the lower connecting cover 42. The upper connecting cover 41 and the lower connecting cover 42 are adapted to the external shape of the connecting member 2 and the triangular reinforcing member 23. The upper connecting cover 41 and the lower connecting cover 42 are provided with stepped holes 45 for installing locking bolts. A filling block 46 is provided on the side of the upper connecting cover 41 and the lower connecting cover 42 that are close to each other. The filling block 46 is used to fill the space between the insertion ends 21 of two adjacent crossbeams to reduce the leakage of the connecting structure.

[0022] The locking component 5 includes an upper locking component 51 and a lower locking component 52. Both the upper locking component 51 and the lower locking component 52 have locking bolt holes 50 on their sides. An inner locking rod 53 is fixedly installed at the bottom of the upper locking component 51, and a lifting ring 54 is fixedly installed at the top of the upper locking component 51. An inner positioning hole 55, adapted to the inner locking rod 53, is opened on the lower locking component 52, and a limiting end face 56 is provided at the top of the lower locking component 52. There is a gap between the outer side of the upper locking component 51 and the inner wall of the connecting component 2, into which the upper support column 1 is inserted during installation. The locking bolt holes 50 are adapted to the positions of the upper locking through hole 25, the lower locking through hole 26, and the fixing through hole 10.

[0023] In use, the lower locking member 52 is inserted into the top of the support column 1, and the limiting end face 56 abuts against the top of the support column 1. The lower locking member 52 and the support column 1 are inserted together into the connector 2. The bottom of the support column 1 located below can be fixedly connected to or have a support structure, such as a support leg, installed. The upper support column 1 can be installed on the upper part of the connector 2 to construct the superstructure. The frame body and all component structural materials are made of high-strength, high-performance steel.

[0024] The assembly process of this prefabricated building frame is as follows: Install the support column 1 mounting base or directly fix the support column 1 on the ground or foundation at the construction site. After the support column 1 is installed, first slide the lower connecting cover 42 onto the top of the support column 1, allowing the support column 1 to pass through the lower connecting cover 42. Then, insert the lower locking piece 52 at the end of the support column 1. Fix the connector 2 onto the top of the support column 1. After the connector 2 is installed, install the locking bolts. The locking bolts pass through the locking bolt mounting step hole 45 of the lower connecting cover 42 and the triangular reinforcing piece 23 in sequence. After the lower locking through hole 26 is opened on the support column insertion end 22, it is connected and fixed with the locking bolt hole 50 on the side of the lower locking member 52 through a threaded structure; according to the structural layout, the crossbeam 3 is inserted into the crossbeam insertion end 21 where the crossbeam 3 needs to be installed. At the same time, the support column 1 and the connector 2 at the adjacent positions are constructed simultaneously to insert and support the crossbeam 3 at the same time. After all the crossbeams 3 that need to be installed on the outside of the connector 2 are inserted, the upper locking member 51 is put into the top of the connector 2, so that the inner locking rod 53 at the bottom of the upper locking member 51 passes through the internal through hole of the connector 2 and the crossbeam 3 in sequence. Insert the inner locking hole 32 into the inner positioning hole 55 of the lower locking member 52, install the upper connecting cover 41 on the upper part of the connector 2, and insert the outer locking rod 43 at the bottom of the upper connecting cover 41 through the outer locking through hole 24 on the crossbeam insertion end 21 and the outer locking hole 33 on the crossbeam 3 into the outer positioning hole 44 of the lower connecting cover 42; fix the three-dimensional reinforcing rib 8 between the crossbeam 3 and the support column 1, and fix the horizontal reinforcing rib 7 between two adjacent crossbeams 3 to complete the initial fixation; depending on the needs of building frame construction, see if it is necessary to... To construct the upper frame structure, if it is necessary to insert and install the upper support column 1 at the top of the connector 2, install the locking bolt in the stepped hole 45 of the upper connecting cover 41, so that the locking bolt passes through the upper locking through hole 25 opened on the upper connecting cover 41 and the insertion end 22 of the triangular reinforcing member 23 in sequence, and is then connected and fixed with the locking bolt hole 50 on the side of the upper locking member 51 through a threaded structure, thus completing the installation of the connection node; following the same installation method, the installation of each connection point in the building frame is completed in sequence, and finally the assembly and construction of the building frame is completed.

[0025] Example 1: Assembly of the frame for a single-story temporary office area on a construction site Scenario requirements A construction site needs to build a single-story temporary office building with a floor area of ​​approximately 200 square meters, a column spacing of 4 meters, and a span of 6 meters. The building must be completed within 72 hours and dismantled and relocated to another construction site for reuse after a 6-month usage period.

[0026] Assembly steps Basic preparation: On the hardened ground of the construction site, fix the support column mounting bases according to the column grid layout (4m×6m). The mounting base adopts a pre-embedded steel plate structure and is fastened to the ground by expansion bolts to ensure that the flatness error is ≤3mm.

[0027] Assembly of support columns and connectors: Select a 3m long Q355B grade circular support column 1 (diameter 150mm, wall thickness 8mm), insert a lower locking member 52 into the top of the support column 1, so that the limiting end face 56 of the lower locking member 52 fits against the top of the support column 1, and then weld the bottom of the support column 1 to the mounting base (weld height 6mm, full weld treatment).

[0028] Slide the lower connecting cover 42 to the upper part of the support column 1 (300mm from the top), then align the support column insertion end 22 of the connector 2 with the top of the support column 1 and insert it until the limiting block inside the connector 2 abuts against the top of the support column 1, ensuring that the insertion depth is consistent (error ≤ 2mm).

[0029] Install the first set of locking bolts: Pass the M16×50 high-strength bolts through the locking bolt mounting stepped hole 45 of the lower connecting cover 42 and the lower locking through hole 26 of the triangular reinforcing member 23, and finally thread them into the locking bolt hole 50 of the lower locking member 52. Tighten the torque wrench to 80N. m, complete the initial fixing of the support column and connector.

[0030] Crossbeam assembly: A 6m long Q355B grade I-beam is selected as the crossbeam 3 (section size 200mm×100mm×7mm). Insertion tips 31 (length 150mm, chamfer 5° for easy insertion) are machined at both ends of the crossbeam 3. Inner locking holes 32 (diameter 18mm) and outer locking holes 33 (diameter 20mm) are drilled in advance on the insertion tips 31.

[0031] Two construction workers work together to push the insertion tip 31 of the crossbeam 3 horizontally into the connector 2 until the end of the crossbeam 3 abuts against the limiting block inside the connector 2 (insertion depth 120mm). At the same time, they ensure that the inner locking hole 32 and the outer locking hole 33 of the crossbeam 3 are aligned with the locking part installation channel and the outer locking through hole 24, respectively (alignment error ≤1mm).

[0032] Repeat the above steps to complete the assembly of all crossbeams 3, ensuring that the spacing deviation between adjacent crossbeams 3 is ≤5mm.

[0033] Locking and connecting cover fixation: Holding the lifting ring 54 of the upper locking member 51, place the upper locking member 51 into the installation channel at the top of the connector 2, so that the inner locking rod 53 (diameter 17mm, length 180mm) at the bottom of the upper locking member 51 passes through the internal through hole of the connector 2 and the inner locking hole 32 of the crossbeam 3 in sequence, and finally inserts into the inner positioning hole 55 of the lower locking member 52, thereby realizing the core locking between the crossbeam and the support column.

[0034] When the upper connecting cover 41 is fastened, the outer locking rod 43 (diameter 19mm, length 200mm) of the upper connecting cover 41 passes through the outer locking through hole 24 of the triangular reinforcing member 23 and the outer locking hole 33 of the crossbeam 3, and is inserted into the outer positioning hole 44 of the lower connecting cover 42. At this time, the filling block 46 of the connecting cover 4 just fills the gap between the adjacent crossbeam insertion ends 21 (gap ≤ 2mm) to prevent the parts from shaking.

[0035] Install the second set of locking bolts: Pass the M16×60 high-strength bolts through the locking bolt mounting stepped hole 45 of the upper connecting cover 41 and the upper locking through hole 25 of the triangular reinforcing member 23, and thread them into the locking bolt hole 50 of the upper locking member 51, tightening to 80N. m, completes the fixing of all connected nodes.

[0036] Reinforcing rib assembly: Weld horizontal reinforcing ribs 7 (Q235 grade square steel, 50mm×50mm×4mm cross section) between adjacent crossbeams 3, with one rib every 2m and a weld length of 30mm, to ensure that the horizontal reinforcing ribs 7 are tightly fitted to the flanges of the crossbeams 3.

[0037] Weld three-dimensional reinforcing ribs 8 (Q235 grade angle steel, ∠50×50×5mm) between the crossbeam 3 and the support column 1. Two ribs are set at each connection node (symmetrically arranged), with a weld height of 5mm, forming a triangular support structure.

[0038] Acceptance and Use: After assembly, check the flatness of the frame (error ≤ 5mm) and the tightness of the nodes (bolt torque deviation ≤ 10%). Then, lay the color steel roof and lightweight partition wall. The temporary office area will be built within 72 hours to meet the load requirement of 3 people / ㎡ (maximum static load 5kN / ㎡).

[0039] Demolition and Reuse After 6 months of use, the removal process is as follows: Remove the corrugated steel panels and partition walls, and unscrew all locking bolts (if there is no rust or jamming, a regular wrench can be used); Lift the upper connecting cover 41 upwards, pull out the upper locking piece 51, and pull out the crossbeam 3 horizontally. Remove the lower connecting cover 42, pull out the connector 2, and finally cut the weld between the support column 1 and the mounting base (the weld should not be excessively oxidized, and the cutting time should be ≤5 minutes / column). All components were inspected and found to be free from deformation and damage (the straightness deviation of the support column is ≤2mm and the crossbeam flange is free from cracks). After being transported to the new construction site, only two worn horizontal reinforcing ribs 7 need to be replaced. After reassembly, they can be used normally, with a reuse rate of 98%.

[0040] Example 2: Assembly of the frame for a double-layer temporary storage shed on a construction site Scenario requirements A municipal engineering construction site needs to build a two-story temporary storage shed to store construction materials (such as steel bars and cement). The bottom floor is 4m high, the top floor is 3m high, the column spacing is 5m, and the span is 8m. The shed needs to be built within 5 days and dismantled after 1 year of use. It needs to withstand a stacking load of 5kN / ㎡ on the top floor.

[0041] Key differences and optimizations Selection of support columns and connectors: The support column 1 is a Q355B grade square support column (section 200mm×200mm×10mm) with a length of 7.5m. It is divided into two sections (lower section 4.2m, upper section 3.3m). The upper and lower layers are connected by connector 2 (the bottom of the upper support column 1 is inserted into the support column insertion end 22 at the top of the connector 2, repeating the locking process of embodiment 1).

[0042] The triangular reinforcing member 23 of connector 2 is thickened to 12mm (originally 8mm), and the diameter of the outer locking through hole 24 is increased to 22mm to accommodate the larger diameter outer locking rod 43 (diameter 21mm), thereby improving the load-bearing capacity of the node.

[0043] Strengthening of crossbeams and reinforcing ribs: The crossbeam 3 is made of Q355B grade I-beam with a length of 8m (section 250mm×118mm×8mm). The length of the insertion tip 31 is increased to 200mm. The diameters of the inner locking hole 32 and the outer locking hole 33 are enlarged to 20mm and 22mm respectively to ensure the fit strength with the locking component.

[0044] The horizontal reinforcing rib 7 is replaced with Q355 grade square steel (section 60mm×60mm×5mm), with one rib installed every 1.5m in the upper layer; the three-dimensional reinforcing rib 8 is replaced with ∠63×63×6mm angle steel, with three ribs installed at each node to form a more stable triangular system.

[0045] Upper-level assembly adapter: When the upper support column 1 is installed, its bottom is inserted into the support column insertion end 22 at the top of the connector 2, and locked to the top of the lower support column 1 by the inner locking rod 53 of the upper locking member 51 (an inner positioning hole 55 needs to be pre-drilled at the top of the lower support column 1), so as to achieve coaxial fixation of the upper and lower support columns (coaxiality error ≤ 3mm).

[0046] After the upper beam 3 is assembled, a shear support plate (10mm thick, 150mm×100mm in size) is welded to the bottom of the beam 3 to prevent the beam from shifting laterally when materials are stacked.

[0047] Performance verification After assembly, load tests were conducted to verify that: when a uniformly distributed load of 5 kN / ㎡ was applied to the upper layer, the maximum deflection of the frame was 12 mm (span 8 m, deflection ratio 1 / 667, meeting the specification requirements); the maximum stress at the joints was 180 MPa (Q355B steel yield strength 345 MPa, safety factor 1.9); there was no structural deformation within one year of use; and the reuse rate of components after dismantling reached 95% (only 3 crossbeams were slightly deformed due to collision, and can continue to be used after correction).

[0048] Example 3: Assembly of a small temporary construction passage frame Scenario requirements A bridge construction site needs to build a temporary construction passage for personnel and small equipment (such as handcarts). The passage is 3m wide, 20m long, with a column spacing of 3m and no span (only single-sided support). It needs to be built within 48 hours and dismantled after a 3-month service period. It must withstand a live load of 1.5kN / ㎡.

[0049] Simplified adaptation solution Structural simplification: Only one side support column 1 (2.5m in length, Q235 grade circular column, 120mm×6mm in diameter) is set, with a column spacing of 3m. The bottom of support column 1 is directly fixed to the ground with expansion bolts (no need to pre-embed mounting base).

[0050] Connector 2 has only two crossbeam insertion ends 21 (symmetrically arranged), the top support column insertion end 22 is eliminated, and the triangular reinforcement 23 is simplified to ∠40×40×4mm angle steel, reducing material costs and assembly difficulty.

[0051] Crossbeams and protective equipment: The crossbeam 3 is a Q235 grade I-beam with a length of 3.5m (section 160mm×88mm×6mm). Only one end is machined with an insertion tip 31, and the other end is welded with a guardrail post (50mm diameter×3mm round steel). The guardrail is 1.2m high and 0.5m apart.

[0052] Instead of setting horizontal reinforcing ribs 7, a single three-dimensional reinforcing rib 8 (∠40×40×4mm angle steel) is welded between the crossbeam 3 and the support column 1, simplifying the assembly process.

[0053] Implementation effect A 20m long passage can be built within 48 hours, with a flatness error of ≤4mm. In the live load test (a handcart fully loaded with 300kg passes through), there is no obvious shaking. Dismantling requires only 1 person to operate, and all components can be dismantled within 2 hours. The components are undamaged and can be directly used for the construction of temporary passages at the next construction site, with a reuse rate of 100%.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated building frame, comprising support columns (1), connectors (2), beams (3), connecting covers (4), and locking components (5), characterized in that: The connector (2) is inserted into the top of the support column (1). The connector (2) is inserted into the side of the crossbeam (3). Several crossbeams (3) can be fixedly connected to the support column (1) through the connector (2). The locking member (5) is installed in the connector (2). The connecting cover (4) is fixedly installed outside the connector (2) and is fixedly connected to the locking member (5) by bolts. A horizontal reinforcing rib (7) is installed between two adjacent crossbeams (3) installed by the connector (2). A three-dimensional reinforcing rib (8) is installed between the crossbeam (3) and the support column (1).

2. The prefabricated building frame according to claim 1, characterized in that: The end of the support column (1) is provided with a fixed through hole (10), and the connector (2) is provided with a limiting block for the insertion depth of the support column (1) and the crossbeam (3).

3. A prefabricated building frame according to claim 1, characterized in that: The connector (2) has a crossbeam insertion end (21) on its side, and a support column insertion end (22) on its top and bottom. A triangular reinforcing member (23) is fixedly connected between the crossbeam insertion end (21) and the support column insertion end (22). An external locking through hole (24) is opened through the triangular reinforcing member (23) and the crossbeam insertion end (21). An upper locking through hole (25) and a lower locking through hole (26) are opened through the triangular reinforcing member (23) and the support column insertion end (22).

4. A prefabricated building frame according to claim 1, characterized in that: The end of the crossbeam (3) is provided with an insertion tip (31), an inner locking hole (32) is provided on the insertion tip (31) near the end, and an outer locking hole (33) is provided on the insertion tip (31) away from the end.

5. A prefabricated building frame according to claim 3, characterized in that: The connecting cover (4) structure includes an upper connecting cover (41) and a lower connecting cover (42) arranged opposite to each other. The upper connecting cover (41) and the lower connecting cover (42) have the same main structure. An outer locking rod (43) is fixed on the upper connecting cover (41). An outer positioning hole (44) adapted to the outer locking rod (43) is opened on the lower connecting cover (42). The upper connecting cover (41) and the lower connecting cover (42) are adapted to the external shape of the connector (2) and the triangular reinforcing member (23). A locking bolt mounting stepped hole (45) is opened on the upper connecting cover (41) and the lower connecting cover (42). A filling block (46) is provided on the side edge of the upper connecting cover (41) and the lower connecting cover (42) that are close to each other.

6. A prefabricated building frame according to claim 1, characterized in that: The locking component (5) includes an upper locking component (51) and a lower locking component (52). Both the upper locking component (51) and the lower locking component (52) have locking bolt holes (50) on their sides. An inner locking rod (53) is fixedly provided at the bottom of the upper locking component (51). A lifting ring (54) is fixedly provided at the top of the upper locking component (51). An inner positioning hole (55) adapted to the inner locking rod (53) is opened on the lower locking component (52). A limiting end face (56) is provided at the top of the lower locking component (52).

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