Module frame structure mortar type corner joint and construction method thereof

Abstract

The invention discloses a module frame structure mortar type corner joint and a construction method thereof.The corner joint comprises an upper module assembly and a lower module assembly, the lower module assembly is provided with mortar-shaped grooves and special-shaped bolts, and the upper module assembly is provided with extrusion inserting pieces and special-shaped nuts; the upper module assembly and the lower module assembly are in threaded connection through the special-shaped bolt and the special-shaped nut, meanwhile, the special-shaped nut presses the extrusion inserting piece, and the extrusion inserting piece is inserted into the mortar-shaped groove to achieve inserting connection. The structure design is ingenious and reasonable, operation is convenient, a post-patching hole does not need to be reserved in a wall, the prefabrication assembly rate of the module frame is increased, on the premise that the rigid connection strength of the corner joint is guaranteed, manufacturing and installation errors of the module frame can be absorbed, and the assembly difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the field of modular buildings, and particularly to a mortar-shaped corner joint of a modular frame structure and a construction method thereof. Background Art

[0002] Modular buildings are the highest form of prefabricated buildings. Ordinary prefabricated buildings often involve factory prefabrication of some building and structural components, and then corresponding professional connections are made on site (such as welding, screwing, self-tapping screw connection, etc.). Modular buildings, on the other hand, emphasize disassembling a building into several components that are fabricated in a factory and integrate all specialties of "architecture, structure, plumbing, electricity, decoration, and intelligentization", and making key and efficient connections on site. Modular buildings have been widely used at home and abroad, from general temporary residences, offices, and medical shelters to permanent schools, white-collar apartments, and homestay hotels.

[0003] The existing method for connecting corner joints between framed box-type building modules is to reserve holes inside the building, first meet the requirements of on-site structural connections, and then further seal the holes. A box-type building frame module structure has at least 4 columns, so there will be quite a lot of holes left on the inner and outer surfaces of the whole building, resulting in an unsatisfactory effect of post-sealing. Even the method of only finishing the building to the rough house level in the factory and then carrying out full decoration on site is not as good as this, which is contrary to the concept of high prefabrication of modular buildings.

[0004] Therefore, how to create a new mortar-shaped corner joint of a modular frame structure and its construction method is one of the important current research topics. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a mortar-shaped corner joint of a modular frame structure, which does not need to reserve post-repair holes on the inner and outer surfaces of the building, improves the prefabrication and assembly rate, absorbs the manufacturing and installation errors of the structure within the allowable range, and realizes rigid connection, thereby overcoming the deficiencies of the prior art.

[0006] To solve the above technical problem, the present invention provides a mortar-shaped corner joint of a modular frame structure, including a lower module assembly and an upper module assembly; The lower module assembly includes a lower main body and a special-shaped bolt; A mortar-shaped groove is formed at the top of the lower main body. The notch of the mortar-shaped groove is square, and the inner walls of all four sides incline inward, so that the inner size of the mortar-shaped groove gradually decreases with the increase of depth. A first square groove is formed at the bottom of the lower main body, and a threaded hole penetrating through to the first square groove is formed at the bottom of the mortar-shaped groove; The special-shaped bolt is in a stepped column shape. A small-diameter stud is processed at the top of the main stud, and a hexagonal column is processed at the bottom. The diameter of the small-diameter stud and the outer diameter of the hexagonal column are both smaller than the diameter of the main stud. A limiting shoulder is provided near the lower end of the main stud. The special-shaped bolt is screwed into the threaded hole from the bottom of the lower main body; The upper module assembly includes an upper body, an extrusion plug, a special-shaped nut, and a limiting component; The upper body is provided with a vertical second square groove, and a square hole is opened at the center of the groove bottom. The lower part of the extrusion plug is in a wedge shape that closely fits the socket-shaped groove, and the upper part is processed with a skirt. The extrusion plug is placed in the second square groove and passes through the square hole, and the skirt abuts against the groove bottom. The special-shaped nut is arranged above the extrusion plug. The top of the special-shaped nut is closed and provided with a hexagonal groove matching the hexagonal column. The limiting component includes a vertical pipe and a second partition plate welded to the outer circumference of the circular pipe. The second partition plate is welded and fixed to the periphery of the top of the second square groove; The special-shaped nut is threadedly connected to the special-shaped bolt. At the same time, the special-shaped nut presses the extrusion plug, and the extrusion plug is inserted into the socket-shaped groove to realize the connection and fixation between the upper module assembly and the lower module assembly.

[0007] As an improvement of the present invention, the outer shapes of the upper body and the lower body are the same, and both include an upper flange, a lower flange, a connecting part, and a web; The upper flange and the lower flange are in the shape of a square with a missing corner, and are connected as a whole through a vertical connecting part. The web is vertically arranged between the upper flange, the lower flange, and the connecting part, so that the cross-sectional shapes of the two side surfaces at the missing corner are in the shape of a side-mounted H, and are used for butt welding with a horizontal H-shaped steel beam.

[0008] Further, the lower module assembly further includes a first partition plate. The first partition plate is a square plate with a circular hole in the middle, and its shape and size are both matched with the first square groove, and is welded and fixed at the notch of the first square groove.

[0009] Further, guiding conical surfaces are processed at the connection of the main stud and the small-diameter stud of the special-shaped bolt, the top of the small-diameter stud, and the bottom of the hexagonal column.

[0010] Further, a pin hole is opened on the small-diameter stud of the special-shaped bolt.

[0011] Further, external threads are processed at the positions near the top and bottom of the main stud of the special-shaped bolt, and there is no external thread in the middle.

[0012] Further, the bottom of the special-shaped nut has an outward flange.

[0013] Further, a horizontal connecting plate is provided between the lower module assembly and the upper module assembly. Several vertical guiding plates are welded at corresponding positions on the top of the lower module and the bottom of the upper module. The side surface of the guiding plate facing the horizontal connecting plate is an inclined surface, which is used for guiding and positioning the horizontal connecting plate.

[0014] Further, the upper part of the extrusion plug is in the shape of a hollow square column, and the length of the horizontal four sides is 10 mm less than the length of the four sides of the square hole, so that the extrusion plug has a moving space in the square hole.

[0015] In addition, the present invention also provides a construction method, which uses the above-mentioned modular frame structure socket-type corner joint for construction. The specific construction sequence is as follows: S1. Arrange the lower module components and tighten the threaded connection between the special-shaped bolt and the lower main body; S2. Lift and install the horizontal connecting plate above the lower module components; S3. Lift and install the upper frame, align the lower module components with the upper module components, horizontally adjust the position of the extrusion plug so that each extrusion plug is aligned with the socket groove of the lower module components; S4. After the adjustment is completed, slowly lower the upper frame so that the upper module components are completely placed on the lower module components; S5. Connect the lengthened torsion bar to the special-shaped bolt at the top corner of the upper frame. After the installation of the lengthened torsion bar is completed, reverse-twist the lengthened torsion bar to release the threaded connection between the special-shaped bolt at the top corner of the upper structure and the lower main body; S6. Lower the lengthened torsion bar and the special-shaped bolt together along the inside of the column until the hexagonal column of the special-shaped bolt is inserted into the hexagonal groove of the special-shaped nut, and then forward-twist the lengthened torsion bar to lock the special-shaped nut to the design torque; S7. Lift the lengthened torsion bar and the special-shaped bolt together along the inside of the column until it reaches the top corner of the upper frame, twist the lengthened torsion bar to connect and fix the special-shaped bolt to the lower main body at the top corner of the upper frame, and then remove the lengthened torsion bar after completion; S8. After repeating steps S5 - S7 to connect and fix all the corner joints, return to step S1.

[0016] With such a design, the present invention has at least the following advantages.

[0017] 1. Through the design of the special-shaped bolt and the special-shaped nut, the special-shaped bolt serves both as a connecting piece of the corner joint and as a tool for screwing the special-shaped nut. By using the lengthened torsion bar and the special-shaped bolt, the special-shaped nut can be screwed to the design torque inside the hollow column, and then the special-shaped bolt is removed and screwed into the lower main body at the top corner as a connecting piece for the upper layer of the frame. The structural design is ingenious and reasonable, without the need to reserve post-cast holes in the wall, improving the prefabrication and assembly rate of the modular frame and meeting the design requirements of fully decorated modules.

[0018] 2. The connection form between the lower module components and the upper module components is a double connection, that is, the joint action of the insertion between the extrusion plug and the socket groove and the bolt connection between the special-shaped bolt and the special-shaped nut meets the strength requirements of the rigid connection of the corner joint and improves the overall construction height of the modular building.

[0019] 3. There is a certain adjustment space between the extrusion plug and the square hole of the upper main body, which can absorb the manufacturing and installation errors of the modular frame within the allowable range and reduce the assembly difficulty. Description of the Drawings

[0020] The above is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, the following provides a more detailed description of the present invention in combination with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a three-dimensional structure diagram of the lower module component.

[0022] Figure 2 It is a three-dimensional structure diagram of the lower module component from another angle.

[0023] Figure 3 It is a disassembled structure diagram of the lower module component.

[0024] Figure 4 It is a three-dimensional structure diagram of the lower main body.

[0025] Figure 5 It is a three-dimensional structure diagram of the lower main body from another angle.

[0026] Figure 6 It is a three-dimensional structure diagram of the upper module component.

[0027] Figure 7 It is a disassembled structure diagram of the upper module component.

[0028] Figure 8 It is a three-dimensional structure diagram of the upper main body.

[0029] Figure 9 It is a three-dimensional structure diagram of the upper main body from another angle.

[0030] Figure 10 It is a three-dimensional structure diagram of the extrusion plug.

[0031] Figure 11 It is a three-dimensional structure diagram of the extrusion plug from another angle.

[0032] Figure 12 It is a structure diagram of the special-shaped nut.

[0033] Figure 13 It is a three-dimensional diagram of the special-shaped nut from another angle.

[0034] Figure 14 It is a three-dimensional structure diagram of the limiting component.

[0035] Figure 15 It is a construction state diagram of step S1.

[0036] Figure 16 It is a construction state diagram of step S2.

[0037] Figure 17 It is a construction state diagram of step S3.

[0038] Figure 18 It is a schematic diagram of the construction state in step S4.

[0039] Figure 19 It is a schematic diagram of the construction state in step S5.

[0040] Figure 20 It is a schematic diagram of the construction state in step S6.

[0041] Figure 21 It is a schematic diagram of the construction state in step S7.

[0042] Explanation of reference numerals: 1. Lower module assembly; 11. Lower main body; 111. Mortise-shaped groove; 112. First square groove; 113. Threaded hole; 114. Upper flange; 115. Lower flange; 116. Connecting part; 117. Web; 118. Guide plate; 12. Special bolt; 121. Main stud; 122. Small-diameter stud; 123. Hexagonal column; 124. Limiting shoulder; 125. Guide conical surface; 13. First partition; 2. Upper module assembly; 21. Upper main body; 211. Second square groove; 212. Square hole; 22. Extrusion insert; 221. Skirt; 23. Special-shaped nut; 231. Hexagonal groove; 232. Flange; 24. Limiting component; 241. Vertical pipe; 242. Second partition; 3. Horizontal connecting plate; 4. Column; 5. H-shaped steel beam; 6. Extended torsion bar. Detailed implementation manners

[0043] Please refer to Figures 1 to 14 , the present invention provides a modular frame structure socket-type corner joint, which includes a lower module assembly 1 and an upper module assembly 2.

[0044] It should be noted that the "upper" and "lower" in the lower module assembly 1 and the upper module assembly 2 refer to their relative positions at the corner joint. From the perspective of the modular frame, the lower module assembly 1 is located at the four top corners of the modular frame, the upper module assembly 2 is located at the four bottom corners of the modular frame, the horizontal sides of the modular frame are all H-shaped steel beams 5, and the vertical sides are hollow columns 4.

[0045] The lower module assembly 1 includes a lower main body 11, a special bolt 12, and a first partition 13.

[0046] The lower main body 11 is an integral steel frame, including an upper flange 114, a lower flange 115, a connecting part 116, a web 117, and a guide plate 118.

[0047] The shapes of the upper flange 114 and the lower flange 115 are truncated square, that is, a pentagon formed by cutting off a right angle along 45° at one of the right angles of the square. At the right angle opposite to the truncated angle, there is a connecting part 116 in the shape of a square column, which connects the upper flange 114 and the lower flange 115 into a whole and plays a role in keeping the upper and lower module columns of the steel structure unobstructed. The web 117 is vertically welded in the vertical planes on both sides of the truncated angle and is welded and fixed to the upper flange 114, the lower flange 115 and the connecting part 116 respectively, so that the cross-sectional shape of the vertical planes on both sides of the truncated angle is a side-mounted H shape, strengthening the structural strength between the upper and lower flanges on the one hand and facilitating the horizontal butt welding with the H-shaped steel beam 5 on the other hand. Several vertical guide plates 118 are welded to the top of the upper flange 114, and their function is to guide and position the horizontal connecting plate. Therefore, the side surfaces of the guide plates 118 facing the horizontal connecting plate are all processed into inclined surfaces.

[0048] At the top of the lower main body 11, a mortar-shaped groove 111 is opened from the upper flange 114 to the connecting part 116. The mouth of the mortar-shaped groove is square, and the inner walls of the four sides are all inclined inward, so that the inner size of the mortar-shaped groove gradually shrinks with the increase of the depth. At the bottom of the lower main body 11, a first square groove 112 is opened from the lower flange 115 to the connecting part 116, and a threaded hole 113 penetrating through to the first square groove is opened at the bottom of the mortar-shaped groove 111.

[0049] The special-shaped bolt 12 is in the shape of a stepped column and includes a main stud 121, a small-diameter stud 122 and a hexagonal column 123.

[0050] The main stud 121 is processed with segmented threads, that is, there are external threads at the upper and lower ends and no external threads in the middle. A limiting shoulder 124 is provided near the lower end of the main stud 121, and the limiting shoulder 124 is in the shape of a regular hexagon.

[0051] The top of the main stud 121 is processed with a small-diameter stud 122, and the bottom is processed with a hexagonal column 123. The diameter of the small-diameter stud 122 and the outer diameter of the hexagonal column 123 are both smaller than the diameter of the main stud 121.

[0052] Guide conical surfaces 125 are processed at the connection between the main stud 121 and the small-diameter stud 122, the top of the small-diameter stud 122, and the bottom of the hexagonal column 123. A pin hole is radially opened on the small-diameter stud 122.

[0053] It should be noted that the function of the small-diameter stud 122 is to connect with the lengthened torsion bar 6. The lengthened torsion bar 6 is a special tool for installing the corner joint. Its upper part is a handle for easy gripping, and its lower part is in a round-tube shape. Threads matching the small-diameter stud 122 are machined inside the round tube, and pin holes are also drilled radially. When the lengthened torsion bar 6 is tightened with the small-diameter stud 122, the pin holes on both of them are exactly aligned, and they are fixed after inserting the pin. The function of the hexagonal column 123 is to be inserted into the hexagonal groove of the special-shaped nut 23 to screw the special-shaped nut 23. The lower-section thread of the main stud 121 is used to connect with the lower main body 111, and the upper-section thread is connected with the special-shaped nut 23. Since the screwing operation is carried out inside the column 4 and is an installation in a non-visible state, the guiding conical surface 125 plays an important guiding role, and the specific installation steps will be described in detail below.

[0054] The first partition plate 13 is a square plate with a round hole in the middle, and its shape and size are both matched with the first square groove 112. It is welded and fixed at the notch of the first square groove 112, and its function is to strengthen the structural strength of the flange.

[0055] In the installation state of the entire lower module assembly 1, the special-shaped bolt 12 is inserted from the bottom of the lower main body 11 and screwed and fixed. The limiting shoulder 124 abuts against the bottom of the first square groove 112. The upper end of the main stud 121 and the small-diameter stud 122 extend out of the socket-shaped groove 111 and are higher than the upper flange 114.

[0056] The upper module assembly 2 includes an upper main body 21, an extrusion insert 22, a special-shaped nut 23, and a limiting component 24.

[0057] The upper main body 21 is the same in shape and size as the lower main body 11. The differences are as follows: First, the guiding plate of the upper main body 21 is located at its bottom, that is, the bottom surface of the lower flange; Second, the upper main body 21 is provided with a vertical second square groove 211 from top to bottom, and a square hole 212 is opened at the center of the bottom of the groove.

[0058] The upper part of the extrusion insert 22 is in a hollow square-column shape. The lengths of its four sides in the horizontal direction are all 10 mm shorter than the lengths of the four sides of the square hole 212, and a skirt 221 is machined at the top. After it is placed in the second square groove 211 and passes through the square hole 212, the skirt 221 is placed on the outer periphery of the square hole 212 and has a 5-mm movement space in the front, back, left, and right directions. The lower part of the extrusion insert 22 is in a hollow wedge shape, and its shape and size are matched with the socket-shaped groove 111. After being inserted into the socket-shaped groove 111, the two fit tightly.

[0059] The special-shaped nut 23 is arranged above the extrusion insert 22. The top of the special-shaped nut 23 is closed and provided with a hexagonal groove 231 matching the hexagonal column 123, and the bottom has an outer flange 232. The outer flange 232 functions as a gasket, equivalent to the integration of a gasket and a nut.

[0060] The retaining member 24 comprises a vertical tube and a second baffle 242 welded to the outer periphery of the vertical tube 241. The second baffle 242 matches the shape and dimensions of the second square slot 211 and is welded to the periphery of the slot top. After welding, a gap remains between the bottom of the vertical tube 241 and the skirt 221 of the extruded insert 22, allowing for horizontal adjustment of the extruded insert 22 while restricting its upward movement. The vertical tube 241 also serves to prevent the special-shaped nut 23 from tipping over before installation.

[0061] During installation, the special-shaped nut 23 is threadedly connected to the special-shaped bolt 12, and at the same time, the special-shaped nut 23 is pressed against the top of the extrusion plug-in 22, and the extrusion plug-in 22 is inserted into the mortar-shaped groove 111, thereby achieving a dual connection of plug-in and bolt-on to ensure the rigid connection strength of the corner node.

[0062] See also Figures 15 to 21 The present invention also provides a construction method using the aforementioned modular frame structure mortar-type corner joint for construction. The specific construction steps are steps S1 to S8. Before construction, the required special tool, the extended torsion bar 6, must be prepared in advance. The specific structure of the extended torsion bar 6 has been described above and will not be repeated here.

[0063] Step S1: Arrange the lower module assembly 1 and tighten the threaded connection between the special-shaped bolt 12 and the lower body 11.

[0064] Step S2: hoisting the horizontal connecting plate 3 to above the lower module assembly 1 .

[0065] It should be noted that the "columns" of modular buildings are composed of four modular frames on the same floor. Figure 15 The local position shown in is the top of the "column" of the assembled layer, that is, the top corners of the four module frames, as shown in Figure 16 As shown, the horizontal connecting plate 3 is a single piece of steel with four rectangular holes cut into corresponding positions. After the lower module assemblies 1 at the corners of the four module frames are assembled, the guide plates 118 precisely enclose a rectangular space. During hoisting, the horizontal connecting plate 3 is slowly lowered, guided by the inclined surfaces of the guide plates 118, to precisely position it in the designed position.

[0066] Step S3: hoist the upper frame (to be assembled) to align the lower module assembly 1 with the upper module assembly 2, and horizontally adjust the position of the extrusion plug-in 22 so that each extrusion plug-in 22 is aligned with the mortar groove 11 of the lower module assembly 1.

[0067] Step S4: After the adjustment is completed, the upper frame is slowly lowered so that the upper module assembly 2 is completely placed on the lower module assembly 1.

[0068] At this time, the extrusion plug 22 is completely inserted into the socket-shaped groove 111, and the special-shaped bolt 12 passes through the inside of the extrusion plug 22. The special-shaped nut 23 will be lifted up, but due to the limiting effect of the limiting component 24, the special-shaped nut 23 will neither tilt nor fall out of the riser pipe 241.

[0069] Step S5: Connect the lengthened torsion bar 6 to the special-shaped bolt 12 at the top corner of the upper frame. When installing, first tighten and then insert the pin. After the lengthened torsion bar 6 is installed, reverse-twist the lengthened torsion bar 6 to release the threaded connection between the special-shaped bolt 12 at the top corner of the upper frame and the lower main body 11.

[0070] Step S6: Lower the lengthened torsion bar 6 and the special-shaped bolt 12 together along the inside of the column 4 until the hexagonal column 123 of the special-shaped bolt 12 is inserted into the hexagonal groove 231 of the special-shaped nut 23, and then forward-twist the lengthened torsion bar 6 to lock the special-shaped nut 23 to the design torque.

[0071] Step S7: Lift the lengthened torsion bar 6 and the special-shaped bolt 12 together along the inside of the column 4 until it reaches the top corner of the upper frame, and then twist the lengthened torsion bar 6 to connect and fix the special-shaped bolt 12 to the lower main body 11 at the top corner of the upper frame. After completion, remove the lengthened torsion bar 6.

[0072] Step S8: After repeating steps S5 to S7 to connect and fix all the corner joints, return to step S1.

[0073] The structure of the present invention is ingeniously and reasonably designed, easy to operate, without the need to reserve post-cast holes in the wall, improving the prefabrication and assembly rate of the module frame. On the premise of ensuring the rigid connection strength of the corner joints, it can absorb the manufacturing and installation errors of the module frame and reduce the assembly difficulty.

[0074] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Those skilled in the art can make some simple modifications, equivalent changes or decorations using the disclosed technical content above, all of which fall within the protection scope of the present invention.

Claims

1. A modular frame structure socket-type corner joint, characterized in that, It includes a lower module component and an upper module component; The lower module component includes a lower body and a special-shaped bolt; A mortise-shaped groove is opened at the top of the lower body. The notch of the mortise-shaped groove is square, and the inner walls of the four sides incline inward, so that the inner dimension of the mortise-shaped groove gradually shrinks with the increase of the depth. A first square groove is opened at the bottom of the lower body, and a threaded hole penetrating through to the first square groove is opened at the bottom of the mortise-shaped groove; The special-shaped bolt is in a stepped column shape. A small-diameter stud is processed at the top of the main stud, and a hexagonal column is processed at the bottom. The diameter of the small-diameter stud and the outer diameter of the hexagonal column are both smaller than the diameter of the main stud. A limiting shoulder is arranged near the lower end of the main stud. The special-shaped bolt is screwed into the threaded hole from the bottom of the lower body; The upper module component includes an upper body, an extrusion insert, a special-shaped nut and a limiting component; A vertical second square groove is opened in the upper body, and a square hole is opened at the center of the groove bottom. The lower part of the extrusion insert is in a wedge shape that fits tightly with the mortise-shaped groove, and a skirt is processed at the upper part. The extrusion insert is placed in the second square groove and passes through the square hole. The skirt abuts against the groove bottom. The special-shaped nut is arranged above the extrusion insert. The top of the special-shaped nut is closed and a hexagonal groove matching the hexagonal column is opened. The limiting component includes a riser pipe and a second partition plate welded to the outer circumference of the round pipe. The second partition plate is welded and fixed to the periphery of the top of the second square groove; The special-shaped nut is threadedly connected with the special-shaped bolt. At the same time, the special-shaped nut presses the extrusion insert, and the extrusion insert is inserted into the mortise-shaped groove to realize the connection and fixation of the upper module component and the lower module component.

2. The mortar-type angular joint of a module frame structure according to claim 1, characterized in that The outer shapes of the upper body and the lower body are the same, and both include an upper flange, a lower flange, a connecting part and a web; The upper flange and the lower flange are in a shape of a square with a missing corner and are connected as a whole through a vertical connecting part. The web is vertically arranged between the upper flange, the lower flange and the connecting part, so that the cross-sectional shapes of the two side surfaces at the missing corner are in a side-mounted H shape for butt welding with a horizontal H-shaped steel beam.

3. A mortar type angular node of a module frame structure according to claim 1, characterized in that, The lower module component further includes a first partition plate. The first partition plate is a square plate with a round hole opened in the middle, and its shape and size match those of the first square groove, and it is welded and fixed at the notch of the first square groove.

4. A mortar-type corner joint of a module frame structure according to claim 1, characterized in that, Guide conical surfaces are processed at the joints of the main stud and the small-diameter stud of the special-shaped bolt, at the top of the small-diameter stud, and at the bottom of the hexagonal column.

5. A modular frame structure mortar-type corner joint according to claim 1, characterized in that, A pin hole is opened on the small-diameter stud of the special-shaped bolt.

6. A modular frame structure mortar type corner joint according to claim 1, characterized in that, External threads are processed at the positions near the top and the bottom of the main stud of the special-shaped bolt, and there is no external thread in the middle.

7. A mortar-type corner joint of a module frame structure according to claim 1, characterized in that The bottom of the special-shaped nut has an outward flange.

8. A mortar-type corner joint of a module frame structure according to claim 1, characterized in that, A horizontal connecting plate is arranged between the lower module component and the upper module component. Several vertical guide plates are welded at the corresponding positions on the top of the lower module and the bottom of the upper module. The side surface of the guide plate facing the horizontal connecting plate is an inclined surface for guiding and positioning the horizontal connecting plate.

9. The mortar type corner joint of a module frame structure according to claim 1, characterized in that, The upper part of the extrusion insert is in a hollow square column shape, and the length of the horizontal four sides is 10 mm less than the length of the four sides of the square hole, so that the extrusion insert has a moving space in the square hole.

10. A construction method, characterized in that, Construct using a modular frame structure mortise-type corner joint as described in any one of claims 1-9. The specific construction sequence is as follows: S1. Arrange the lower module component and tighten and fix the threaded connection between the special-shaped bolt and the lower body; S2. Lift the horizontal connecting plate above the lower module component; S3. Lift the upper frame and align the lower module assembly with the upper module assembly. Horizontally adjust the position of the extrusion plug so that each extrusion plug is aligned with the socket-shaped groove of the lower module assembly; S4. After the adjustment is completed, slowly lower the upper frame so that the upper module assembly is completely placed on top of the lower module assembly; S5. Connect the extension torsion bar to the special-shaped bolt at the top corner of the upper frame. After the installation of the extension torsion bar is completed, reverse-rotate the extension torsion bar to release the threaded connection between the special-shaped bolt at the top corner of the upper structure and the lower main body; S6. Lower the extension torsion bar and the special-shaped bolt together along the inside of the column until the hexagonal column of the special-shaped bolt is inserted into the hexagonal groove of the special-shaped nut. Rotate the extension torsion bar forward to lock the special-shaped nut to the design torque; S7. Lift the extension torsion bar and the special-shaped bolt together along the inside of the column until it reaches the top corner of the upper frame. Rotate the extension torsion bar to fix the special-shaped bolt to the lower main body at the top corner of the upper frame. After completion, remove the extension torsion bar; S8. After repeating steps S5 to S7 to fix all the corner joints, return to step S1.

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