Web belt connected with web belt joint, web frame, prefabricated component and assembly

Abstract

The utility model discloses a kind of web belt, net rack, prefabricated component and assembly of connecting rib belt joint, belong to building technical field;Including: longitudinal rib and respectively located first connector and second connector at longitudinal rib both ends;First connector and / or second connector are provided with top bolt;First connector and / or second connector are expanded head;Top bolt is connected by first sleeve with one or more longitudinal rib thread, extrusion connection or welding;First connector and / or second connector are extruded outer thread connector, and the end surface of extruded outer thread connector is provided with second screw hole, and top bolt is cooperatively arranged with second screw hole.The utility model is equipped with connector on net rack, simple structure, convenient to install, and integrality is good after installation, and connecting place is firm, and it has durability and stability, and installation joint part is hidden in first sleeve inside, without affecting the beauty of surface decoration.

Description

Technical Field

[0001] This utility model relates to the field of building technology, specifically to a mesh belt, space frame, prefabricated component and assembly for connecting reinforcing bar joints. Background Technology

[0002] The current connection method for vertical precast wall panels / columns in prefabricated buildings uses a steel bar sleeve grouting anchoring connection. This involves inserting the upper connecting steel bars of the precast wall panel / column into a pre-embedded sleeve at the bottom of the precast wall panel / column. The wall panel requires support, which is inefficient and costly. Then, high-strength grout is injected into the sleeve through grouting holes, which is also inefficient and costly. The grout sets to form an anchoring connection between the steel bars and the sleeve. This connection method suffers from problems such as grout leakage, jamming, misalignment, and failure to install properly. The joints at the component connections are also prone to rainwater leakage. Many factors affect the connection quality, resulting in poor quality control and reduced seismic safety. These technical problems need to be solved.

[0003] Double-layer composite wall panels consist of pre-cast composite slabs approximately 6 cm thick on both sides, with a hollow center. During installation, connecting steel bars are placed in the bottom cavity of the wall panel and inserted into it. After installation with support rods, the composite floor slab is installed. Next, connecting steel bars are inserted and tied into the top cavity of the double-layer composite wall panel, extending approximately 40-50 cm above the floor slab. Concrete is then poured into the cavity of the double-layer composite wall panel and onto the surface of the floor slab, completing one layer. The process is repeated: after one layer is poured, the next layer of double-layer composite wall panels is installed. Connecting steel bars are inserted into the bottom cavity of the next layer for support and fixation; the floor slab is then installed; connecting steel bars are installed at the top of the double-layer composite wall panels; concrete is poured; and the process is repeated for each layer.

[0004] The existing technical problems with double-layer composite slab flooring are as follows: 1. On-site manual tying of connecting steel bars is required. The spacing and position of the connecting steel bars are poorly controlled, resulting in low efficiency, increased steel bar usage, and high costs. 2. The installation position of the connecting steel bars cannot be coaxial with the vertical steel bars of the wall panel, which does not meet the scientific requirement that the steel bars should be distributed away from the center and meet the requirements of the protective layer. The tensile strength of the vertical connecting steel bars of the wall panel is also poor. 3. During the concrete pouring process of double-layer composite slabs, quality problems such as pouring height, density, and honeycomb voids cannot be detected. The bonding layer between the cast-in-place concrete and the composite layer is prone to hollowing due to the curing shrinkage characteristics of concrete. 4. The concrete pouring and vibration process is prone to bulging.

[0005] The structural connection of existing precast composite slab floor components in prefabricated buildings generally adopts the composite slab method, which involves two-stage casting. First, the bottom of the slab is precast to a thickness of approximately 6 cm. Then, steel reinforcement is tied on-site, and the upper concrete is poured to form the composite slab. Because of its thinness, the composite slab cannot withstand heavy loads and is prone to cracking during transportation due to bumps and external forces. Before installation, a support frame and formwork need to be erected to prevent cracking under stress, resulting in low efficiency and high cost. A second round of steel reinforcement tying and concrete pouring is required to form a complete structure. Because the concrete pouring cannot be continuous, the efficiency is low and the cost is high. The two-stage casting method of composite slabs requires increasing the slab thickness to compensate for the reduced load-bearing capacity, resulting in increased material usage, greater weight, and higher cost (approximately 30% more thickness / material usage / weight / cost compared to a single-stage cast slab). Furthermore, the quality of the composite layer, including hollow areas and cracking, is uncontrollable, reducing seismic resistance. These technical problems need to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide a mesh belt, space frame, prefabricated component and assembly for connecting reinforcing strip joints, so as to solve the common quality problems of vertical component (wall panel / column) connection: grout leakage, jamming, unstable and uncontrollable quality, as well as the problems of low installation efficiency, high cost, concealed construction, inconvenient quality inspection and low seismic resistance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A connecting rib, comprising:

[0009] The longitudinal rib and a first connector and a second connector located at both ends of the longitudinal rib; the second connector is detachably connected to the first connector on another longitudinal rib.

[0010] Furthermore, the first connector and / or the second connector are provided with tightening bolts.

[0011] Furthermore, the first connector and / or the second connector are enlarged connectors.

[0012] Furthermore, the tightening bolt is connected to one or more longitudinal ribs by threading, extrusion, or welding via a first sleeve.

[0013] Furthermore, the first connector and / or the second connector are both extruded external thread connectors, and the end face of the extruded external thread connector is provided with a second threaded hole, and the tightening bolt is configured to cooperate with the second threaded hole.

[0014] Furthermore, a gasket is provided between the enlarged head and the enlarged head on another longitudinal rib.

[0015] Furthermore, the end face of the enlarged head is provided with a first screw hole or groove, the tightening bolt is configured to cooperate with the first screw hole, and the top of the tightening bolt has a protrusion or a recess;

[0016] The protrusion of the tightening bolt abuts against the groove.

[0017] or

[0018] The protrusion of the tightening bolt abuts against the recess of the tightening bolt on another longitudinal rib.

[0019] Furthermore, the enlarged head is fitted with a sleeve with external threads or a first lock nut with internal threads;

[0020] The internal thread of the first lock nut is threadedly connected to the external thread of the sleeve on another longitudinal rib.

[0021] or

[0022] The internal thread of the first lock nut is connected to the thread of the first sleeve on another longitudinal rib.

[0023] Furthermore, the extruded external thread connector is threadedly connected to the internal thread of the first lock nut on another longitudinal rib.

[0024] or

[0025] The extruded external thread connector is threadedly connected to the extruded external thread connector on another longitudinal rib via a second sleeve.

[0026] Furthermore, the enlarged head is connected to a second lock nut with external threads; the external thread of the second lock nut is threadedly connected to the internal thread of the first lock nut on another longitudinal rib.

[0027] or

[0028] The external thread of the second lock nut is threadedly connected to the external thread of the second lock nut on another longitudinal rib via the second sleeve.

[0029] Furthermore, the enlarged head has a connecting rod.

[0030] Furthermore, the first lock nut is provided with an opening for observation, glue injection, or slurry injection.

[0031] A precast component includes longitudinal bars as described above, a plurality of said longitudinal bars are spaced apart, stirrups are tied between said longitudinal bars, and concrete is poured on the grid formed by said longitudinal bars and stirrups.

[0032] Furthermore, the prefabricated component has a through hole in the middle part to form a hollow prefabricated component.

[0033] Furthermore, the first and second connectors at both ends of the longitudinal rib are exposed at both ends of the precast component for connection between the precast components.

[0034] A mesh belt includes longitudinal ribs as described above, at least two parallel longitudinal ribs, and a plurality of web ribs spaced apart between adjacent longitudinal ribs.

[0035] Furthermore, the multiple abdominal tendons are parallel to each other or connected end to end.

[0036] Furthermore, the end of the abdominal rib is provided with a connector, which has a hook or thread structure.

[0037] A mesh frame, comprising the mesh belts as described above, wherein a plurality of the mesh belts are spaced apart, and further comprising:

[0038] Multiple parallel transverse ribs, which are perpendicular to the longitudinal ribs, are used for connecting the mesh belts.

[0039] Furthermore, both ends of the transverse rib extend beyond the beginning and end of all the mesh belts.

[0040] Furthermore, the transverse ribs are one or more of round steel, threaded steel, or shaped steel; the shaped steel is one or more of Z-shaped steel, C-shaped steel, or M-shaped steel.

[0041] A precast component includes a space frame as described above, and also includes templates. Templates are provided on both sides of the space frame, and the templates are connected to the portions of the transverse reinforcements that extend beyond the longitudinal reinforcements.

[0042] Furthermore, the template is either fixedly connected to or detachably connected to the transverse rib.

[0043] Furthermore, it also includes a connector, through which the template and the transverse rib are connected.

[0044] Furthermore, when the template is a concrete slab, the interior of the concrete slab is provided with steel mesh and / or mesh fabric.

[0045] An assembly of prefabricated components, the assembly including wall panels and floor slabs, both the wall panels and the floor slabs using prefabricated components as described above, the length of the space frame in the wall panels and the floor slabs being greater than the length of the template, at least two wall panels spaced apart, the floor slabs being disposed on top of the wall panels, and the two ends of the templates in the floor slabs respectively overlapping the templates on the inner side of the wall panels.

[0046] Furthermore, when the number of wall panels in the same direction is greater than two, the space frame portions of adjacent floor slabs that extend beyond the template overlap each other.

[0047] This utility model has the following beneficial effects:

[0048] 1. This utility model features a connector on the grid frame, resulting in a simple structure, convenient installation, and good overall integrity after installation. The connection is both firm and durable with stability. The installation joint components are concealed inside the first sleeve, without affecting the aesthetics of the surface decoration. It solves the problems of quality reliability, seismic resistance, safety, and construction in existing prefabricated component connections in assembled buildings. It also solves the common quality problems of vertical component (wall panel / column) connections, such as grout leakage, jamming, and unstable and uncontrollable quality, as well as problems such as low installation efficiency, high cost, concealed construction, inconvenient quality inspection, and low seismic resistance. Furthermore, it solves the problems of horizontal component (floor slab) composite slabs, such as hollow cracking in the bonding layer, requiring a support system, secondary reinforcement binding, and overall concrete pouring. Finally, it solves the quality problems of excessive material usage, increased self-weight, increased cost, reduced load, low efficiency, and poor seismic resistance.

[0049] 2. In this utility model, mechanical connection is achieved between the components. During the installation process, the two steel bars are pressed together by tightening the bolts to transmit force. At the same time, the verticality can be adjusted. The mechanical connection of the lock nut is safe and reliable. No support or fixation is required during the installation process. This solves the problem of high efficiency and low cost that traditional component installation requires support and fixation. It is efficient, low-cost, and improves the safety and seismic resistance of the structural connection.

[0050] 3. All components in this utility model are prefabricated, processed and assembled in the factory, realizing modular production, standardized connection, fast construction and simple installation. Attached Figure Description

[0051] Figures 1-6 This is a schematic diagram of various structures of the longitudinal ribs in this utility model;

[0052] Figures 7-22 This is a schematic diagram showing various connection methods between adjacent longitudinal ribs in this utility model;

[0053] Figure 23 This is a schematic diagram of the space frame structure of this utility model;

[0054] Figure 24 This is a schematic diagram of the precast column structure of this utility model;

[0055] Figure 25 This is a schematic diagram of the precast column end face structure of this utility model;

[0056] Figure 26 This is a schematic diagram of the precast beam structure of this utility model;

[0057] Figure 27 This is a schematic diagram of the precast beam end face structure of this utility model;

[0058] Figure 28 The component drawing of this utility model shows a formwork-free wall panel;

[0059] Figure 29 Before installing the precast columns of this utility model, the connecting ribs are aligned.

[0060] Figure 30 This is a diagram showing the installation details of the precast column of this utility model;

[0061] Figure 31 For the installation of wall panels / columns according to this utility model;

[0062] Figure 32 This is an installation diagram of the precast beam of this utility model;

[0063] Figure 33 This is a diagram showing the installation and connection of the floor slab end face according to this utility model;

[0064] Figure 34 This utility model relates to a column and beam / floor slab combination.

[0065] Figure 35 This is a diagram showing the connection node between the precast beam and the floor slab of this utility model.

[0066] Figure 36 This is a diagram showing the installation and connection of the floor slab end face of this utility model.

[0067] The components are: 1. Longitudinal rib; 2. Web rib; 3. Enlarged head; 4. Second sleeve; 5. Extruded external thread connector; 6. Tightening bolt; 7. Washer; 8. Second lock nut; 9. First lock nut; 10. First screw hole; 11. Hoop; 12. First sleeve; 13. Longitudinal prestressed rib; 14. Connecting rod; 15. Composite enlarged head; 16. Opening. Detailed Implementation

[0068] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments of the present invention.

[0069] Example 1

[0070] Reference Figures 1-6 A connecting rib includes a longitudinal rib 1 and a first connecting head and a second connecting head located at both ends of the longitudinal rib 1; a tightening bolt 6 is provided on the first connecting head and / or the second connecting head;

[0071] Preferably, the longitudinal reinforcement 1 is a regular steel bar or a longitudinal prestressed reinforcement 13.

[0072] Preferably, one end of the reinforcing bar is provided with a composite enlarged head 15 with external threads, and the other end is provided with a composite enlarged head 15 with internal threads; the composite enlarged head 15 and the reinforcing bar are connected by threaded connection or extrusion connection; furthermore, the end face of the composite enlarged head 15 with external threads at one end of the reinforcing bar is provided with a screw hole, and a tightening bolt is installed in the screw hole to adjust the verticality of the vertical component.

[0073] Preferably, the composite enlarged head 15 of the reinforcing bar is a threaded reinforcing bar or a round steel bar; the composite enlarged head 15 of the reinforcing bar with extrusion connection can be a threaded steel bar, a prestressed steel bar, or a steel strand.

[0074] Before installing the above components, install the connecting rod with the enlarged head into the threaded hole of the composite enlarged head 15 as required. One end of the connecting rod is provided with an external thread, which is screwed into the threaded hole of the composite enlarged head 15. Before screwing the connecting rod into the threaded hole, first install the lock nut. One end of the lock nut is narrowed, with the inner diameter of the narrowed end being larger than the diameter of the connecting rod but smaller than the diameter of the enlarged head of the connecting rod. The other end of the lock nut has an inner diameter larger than the diameter of the enlarged head of the connecting rod and is provided with an internal thread. The internal thread of the lock nut of the connecting rod is screwed into the external thread of the composite enlarged head 15 at the other end of the reinforcing bar. Insert the threaded end of the connecting rod into the lock nut from the internal thread end of the lock nut, so that the lock nut is fitted onto the connecting rod, and then screw it into the threaded hole of the composite enlarged head 15.

[0075] Furthermore, before screwing the connecting rod to the composite enlarged head 15, thread-locking adhesive is applied to the threaded surface to improve the reliability of the connection strength of the connecting rod; the length of the connecting rod is installed according to the design length and position requirements;

[0076] Furthermore, for prestressed column members with prestressed steel reinforcement, the connecting rod is located above the precast column and its length exceeds the height of the floor slab after installation;

[0077] Preferably, the tightening bolt 6 is threaded, extruded, or welded to one or more longitudinal reinforcing bars 1 via the first sleeve 12, so as to connect the tightening bolt 6 to the reinforcing bar;

[0078] Reference Figures 7-22 Preferably, the second connector is detachably connected to the first connector on another longitudinal reinforcement 1 to achieve the connection between the reinforcing bars; the first connector and / or the second connector is an enlarged head 3; the end face of the enlarged head 3 is provided with a first screw hole 10 or a groove, the tightening bolt 6 is fitted with the first screw hole 10, and the top of the tightening bolt 6 has a protrusion or a recess; the protrusion of the tightening bolt 6 abuts against the groove, or the protrusion of the tightening bolt 6 abuts against the recess of the tightening bolt 6 on another longitudinal reinforcement 1, to achieve the connection between the reinforcing bars.

[0079] Preferably, the enlarged head 3 is fitted with a sleeve 11 with external threads or a first lock nut 9 with internal threads; the internal thread of the first lock nut 9 is threadedly connected to the external thread of the sleeve 11 on another longitudinal rib 1 or the internal thread of the first lock nut 9 is threadedly connected to the first sleeve 12 on another longitudinal rib 1.

[0080] Preferably, the first connector and / or the second connector are both externally threaded connectors 5. The end face of the externally threaded connector 5 is provided with a second threaded hole, and the tightening bolt 6 is fitted into the second threaded hole. The externally threaded connector 5 is threadedly connected to the internal thread of the first lock nut 9 on another longitudinal rib 1, or the externally threaded connector 5 is threadedly connected to the externally threaded connector 5 on another longitudinal rib 1 through the second sleeve 4.

[0081] Preferably, the enlarged head 3 is connected to a second lock nut 8 with external threads; the external thread of the second lock nut 8 is threadedly connected to the internal thread of the first lock nut 9 on another longitudinal rib 1, or the external thread of the second lock nut 8 is threadedly connected to the external thread of the second lock nut 8 on another longitudinal rib 1 through the second sleeve 4.

[0082] Preferably, the enlarged head 3 has a connecting rod 14, and the end face of the connecting rod 14 is provided with a concave-convex surface that can be fitted and positioned with the end face of the external threaded composite enlarged head 15.

[0083] Preferably, the first lock nut 9 is provided with an opening for observation, glue injection or slurry injection.

[0084] Preferably, a gasket 7 is provided between the enlarged head 3 and the enlarged head 3 on another longitudinal rib 1.

[0085] Furthermore, multiple longitudinal reinforcement bars 1 are spaced apart, and stirrups are tied between the longitudinal reinforcement bars 1. Concrete is poured on the grid formed by the longitudinal reinforcement bars 1 and the stirrups. A through hole is provided in the middle part of the precast component to form a hollow precast component. The first and second connectors at both ends of the longitudinal reinforcement bars 1 are exposed at both ends of the precast component for connection between the precast components.

[0086] Example 2

[0087] This embodiment provides a mesh belt, including at least two parallel longitudinal ribs 1, and multiple web ribs 2 spaced apart between adjacent longitudinal ribs 1. The web ribs 2 are parallel to each other or connected end-to-end. Preferably, the ends of the web ribs 2 are provided with connectors, which have hooks or threaded structures.

[0088] Example 3

[0089] Reference Figure 23 This embodiment provides a mesh frame, including multiple spaced mesh belts, and further includes:

[0090] Multiple parallel transverse ribs are arranged perpendicularly to longitudinal rib 1 and are used for connecting the mesh belts; both ends of the transverse ribs extend beyond the beginning and end of all the mesh belts.

[0091] Preferably, the transverse ribs are one or more of round steel, threaded steel, or shaped steel; the shaped steel is one or more of Z-shaped steel, C-shaped steel, or M-shaped steel.

[0092] Furthermore, templates are provided on both sides of the space frame. The templates are connected to the transverse reinforcements beyond the longitudinal reinforcement 1. The templates are fixedly or detachably connected to the transverse reinforcements through connectors. When the template is a concrete slab, the interior of the concrete slab is provided with steel mesh and / or mesh cloth.

[0093] Example 4

[0094] Reference Figures 24-28 This embodiment provides an assembly of prefabricated components, including wall panels and floor slabs. Both wall panels and floor slabs use templates and the space frame in Embodiment 3. The length of the space frame in the wall panels and floor slabs is greater than the length of the template. At least two wall panels are provided at intervals. The floor slabs are set on top of the wall panels, and the two ends of the templates in the floor slabs overlap the templates on the inner side of the wall panels.

[0095] When there are more than two wall panels in the same direction, the space frame portions that extend beyond the formwork in adjacent floor slabs overlap each other.

[0096] Example 5

[0097] Reference Figures 29-36 This embodiment provides a construction method for an assembly of prefabricated components, the assembly being the one described in Embodiment 4. The specific steps include:

[0098] Installation of precast vertical columns:

[0099] The vertical components are equipped with pre-reserved connecting ribs at their installation locations, and the ends of the connecting ribs are provided with lock nuts or threads that match the connection to the components.

[0100] The precast components are hoisted to a height of about one meter above the installation position and then paused. The components are manually controlled and adjusted in conjunction with a crane / tower crane. Once aligned, the components are slowly lowered to the correct elevation. First, the connecting rods at the four corners of the component are tightened to adjust its verticality and ensure it is securely fitted with the pre-reserved connecting ribs. After the verticality adjustment is satisfactory and the connecting rods and ribs are securely fitted, the locking nuts are screwed onto the external threads of the connecting ribs to lock the connection. The other connecting ribs of the connecting components are then connected and fixed in the same manner. The hooks are then removed. Other vertical components are then installed in a cyclical manner. After the installation of the vertical components on this floor is completed, high-strength concrete is poured at the interface as required. The concrete is poured from the hollow holes of the components. The vertical components can be poured entirely into a solid structure, including the hollow holes and connection points, or only the hollow holes at the structural connection points can be poured without concrete, retaining the hollow structure. After the concrete pouring is completed, the components and the lower structure are connected to form a reinforced concrete monolithic structure.

[0101] Furthermore, reinforcing bars can be placed inside the hollow holes of hollow structures to improve the structural connection strength;

[0102] Installation of horizontal beams / slabs:

[0103] The first step is to install the horizontal structural beams after the precast columns are installed. Temporary mounting screw holes are provided at the connection points between the precast columns and precast beams. When installing the precast beams, the beam mounting brackets are installed in advance.

[0104] The second step is to install the connecting rods before installing the precast beams, and adjust the length of the connecting rods extending out of the components to meet the installation requirements to prevent collisions caused by excessive length.

[0105] The third step is the installation of precast beams. The beams are hoisted to a height of about one meter vertically above the installation position and then paused. The operator manually controls the components to adjust the installation position in conjunction with the crane / tower crane. After the installation position is aligned, the operator manually controls the components to slowly lower them to the elevation position. The precast beams are then connected and fixed to the support frame. After the precast beams are installed and fixed in a qualified manner, the hooks are removed. The next precast beam is then installed, and the process is repeated.

[0106] Tighten the connecting rod of the precast beam to make the connecting rod fit tightly against the external threaded enlarger head, and then screw the connecting lock nut into the external thread of the composite enlarger head 15 to lock the connection.

[0107] Furthermore, prestressed steel strands are threaded through the hollow holes of the hollow precast beams, connecting coaxial beams. Sleeves are installed at the connection interfaces to seal the hollow hole joints. After the concrete is poured and reaches the required strength, the prestressed steel strands are tensioned, improving the overall integrity and load-bearing capacity of the beams. The hollow holes can be straight or curved; preferably, curved ducts are used for prestressing to create a negative bending moment, increasing the beam load. The prestressed steel strands are continuous throughout, enabling continuous steel strand reinforcement in multi-span beams, improving the overall structural integrity and load-bearing capacity. This solves the problem of low load-bearing capacity due to the need for connecting threaded steel bars.

[0108] Step 4: Precast floor slab installation:

[0109] After the precast beams are installed and fixed, temporary supports required for the floor slab installation should be set up as needed.

[0110] Before installing the floor slab, install the connecting rods first. The installation method is the same as that for precast columns and beams.

[0111] Precast floor slabs are installed by hoisting them to a height of approximately one meter vertically above the installation position and pausing. Manual personnel guide and control the components, working with the crane / tower crane to adjust the installation position. Once aligned, the components are slowly lowered to the correct elevation. After the floor slab is in place, the level is adjusted. Once the position and level are satisfactory, the fixed support frame is adjusted to ensure the floor slab is stable, secure, and safe before removing the hook. The next floor slab is then hoisted, ensuring its installation position meets requirements and that the longitudinal connecting steel bars are aligned for easy connection of the connecting rods. This process is repeated. After the floor slabs are installed, the connecting rods are connected to the composite external threaded enlarged head. The connection method is the same as for beam connections: first tighten the positioning, then screw the lock nut into place.

[0112] After the floor slab is installed, concrete is poured at the joints of the floor slab to connect the floor slab with the beams and columns into a whole reinforced concrete structure.

[0113] Cyclic installation work.

[0114] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A connecting rib, characterized in that, include: The longitudinal rib and a first connector and a second connector located at both ends of the longitudinal rib; the second connector is detachably connected to the first connector on another longitudinal rib. The first connector and / or the second connector are provided with a tightening bolt; The first connector and / or the second connector are enlarged connectors; The tightening bolt is connected to one or more longitudinal ribs by threading, extrusion, or welding through the first sleeve; The first connector and / or the second connector are both extruded external thread connectors. The end face of the extruded external thread connector is provided with a second threaded hole, and the tightening bolt is configured to cooperate with the second threaded hole.

2. A connecting rib according to claim 1, characterized in that, A gasket is provided between the enlarged head and the enlarged head on another longitudinal rib.

3. A connecting rib according to claim 1, characterized in that, The end face of the enlarged head is provided with a first screw hole or groove, the tightening bolt is configured to cooperate with the first screw hole, and the top of the tightening bolt has a protrusion or a recess. The protrusion of the tightening bolt abuts against the groove; or The protrusion of the tightening bolt abuts against the recess of the tightening bolt on another longitudinal rib.

4. A connecting rib according to claim 3, characterized in that, The enlarged head is fitted with a sleeve with external threads or a first lock nut with internal threads; The internal thread of the first lock nut is threadedly connected to the external thread of the sleeve on another longitudinal rib; or The internal thread of the first lock nut is connected to the thread of the first sleeve on another longitudinal rib.

5. A connecting rib according to claim 4, characterized in that, The extruded external thread connector is threadedly connected to the internal thread of the first lock nut on another longitudinal rib; or The extruded external thread connector is threadedly connected to the extruded external thread connector on another longitudinal rib via a second sleeve.

6. A connecting rib according to claim 4, characterized in that, The enlarged head is connected to a second lock nut with external threads; the external thread of the second lock nut is threadedly connected to the internal thread of the first lock nut on another longitudinal rib. or The external thread of the second lock nut is threadedly connected to the external thread of the second lock nut on another longitudinal rib via the second sleeve.

7. A connecting rib according to claim 1, characterized in that, The enlarged head has a connecting rod.

8. A connecting rib according to claim 4, characterized in that, The first lock nut has an opening for observation, glue injection, or slurry injection.

9. A prefabricated component, characterized in that, It includes multiple connecting bars as described in any one of claims 1-3, multiple longitudinal bars are spaced apart, stirrups are tied between the longitudinal bars, and concrete is poured on the grid formed by the longitudinal bars and the stirrups.

10. A prefabricated component according to claim 9, characterized in that, The prefabricated component has a through hole in the middle part to form a hollow prefabricated component.

11. A prefabricated component according to claim 10, characterized in that, The first and second connectors at both ends of the longitudinal rib are exposed at both ends of the precast component for connection between the precast components.

12. A mesh belt, characterized in that, It includes the connecting ribs as described in any one of claims 1-3, at least two parallel longitudinal ribs, and a plurality of web ribs spaced apart between two adjacent longitudinal ribs.

13. A mesh belt according to claim 12, characterized in that, The multiple abdominal tendons are parallel to each other or connected end to end.

14. A mesh belt according to claim 13, characterized in that, The end of the rib is provided with a connector, which has a hook or thread structure.

15. A space frame, characterized in that, The system includes multiple mesh belts as described in any one of claims 12-14, wherein the multiple mesh belts are spaced apart, and further includes: Multiple parallel transverse ribs, which are perpendicular to the longitudinal ribs, are used for connecting the mesh belts.

16. A space frame according to claim 15, characterized in that, Both ends of the transverse rib extend beyond the beginning and end of all the mesh belts.

17. A space frame according to claim 16, characterized in that, The transverse ribs are one or more of round steel, threaded steel, or shaped steel; the shaped steel is one or more of Z-shaped steel, C-shaped steel, or M-shaped steel.

18. A prefabricated component, characterized in that, The space frame, including any one of claims 15-17, further includes a template, wherein templates are provided on both sides of the space frame, and the templates are connected to the portions of the transverse ribs that extend beyond the longitudinal ribs.

19. A prefabricated component according to claim 18, characterized in that, The template is fixedly connected to or detachably connected to the transverse rib.

20. A prefabricated component according to claim 18, characterized in that, It also includes connectors, through which the template and the transverse rib are connected.

21. A prefabricated component according to claim 20, characterized in that, When the template is a concrete slab, the interior of the concrete slab is provided with steel mesh and / or mesh fabric.

22. An assembly of prefabricated components, characterized in that, The assembly includes wall panels and floor slabs. The wall panels are prefabricated components as described in any one of claims 18-21, and the floor slabs are prefabricated components as described in any one of claims 18-21. The length of the space frame in both the wall panels and the floor slabs is greater than the length of the template. At least two wall panels are provided at intervals. The floor slabs are located on top of the wall panels, and the two ends of the templates in the floor slabs overlap the templates on the inner side of the wall panels.

23. The assembly of prefabricated components according to claim 22, characterized in that, When there are more than two wall panels in the same direction, the space frame portions of adjacent floor slabs that extend beyond the template overlap each other.

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