Prefabricated hollow core composite system

Abstract

The application discloses a prefabricated hollow superposition system, which comprises a prefabricated unit, a plurality of corrugated pipes arranged transversely and spaced apart are embedded in the prefabricated unit, and the inner hole of each corrugated pipe forms a hole passing through the upper and lower sides of the prefabricated unit; a base unit, which has a plurality of steel joints arranged transversely and spaced apart in an extended state; a plurality of vertical connecting steels, the lower end of each vertical connecting steel is connected with the steel joint through a connecting sleeve, and the vertical connecting steel is used for penetrating the hole of the prefabricated unit and extending out of the upper side of the prefabricated unit; after the vertical connecting steel penetrates the hole of the prefabricated unit and the lower side of the prefabricated unit is butted against the base unit, concrete is poured into the hole to form a post-poured part; a plurality of first anchoring components arranged axially and spaced apart and at least protruding radially inward are arranged on the corrugated pipe, and a plurality of second anchoring components arranged axially and spaced apart and protruding radially outward are arranged on the vertical connecting steel.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, and in particular to a prefabricated hollow composite system. Background Technology

[0002] A typical construction method for precast hollow composite systems involves prefabricating precast units (which can be precast modules or column units) in a prefabrication plant. Corrugated metal pipes are embedded within each precast unit, creating vertically continuous channels. During on-site construction, vertical connecting steel bars are inserted into these channels, and concrete is poured into them. This integrates the poured concrete with the precast modules and connecting steel bars, ensuring load transfer and structural continuity between floors. This precast hollow composite system offers advantages such as lightweight components, minimal on-site wet work, and rapid construction.

[0003] However, in practical applications and subsequent research, the applicant discovered that the aforementioned prefabricated hollow composite system still has the following shortcomings: 1. Insufficient axial anchorage between the post-cast section and the borehole wall. Specifically, although the corrugated structure of the corrugated pipe provides some anchorage between the post-cast section and the pipe, due to factors such as shrinkage porosity and voids in the post-cast section, as well as the structure of the corrugated pipe itself, the anchorage between the post-cast section and the borehole wall is insufficient when the building structure is required to resist greater shear forces.

[0004] 2. Insufficient anchorage between the post-cast section and the connecting reinforcement. Specifically, due to factors such as the small contact area between the reinforcement and the post-cast component and the insufficient radial protrusion structure of the reinforcement (the radial protrusion size of the threaded ribs of threaded reinforcement is not large), the anchorage between the post-cast section and the connecting reinforcement is insufficient when the building structure is required to resist greater shear forces. Summary of the Invention

[0005] To address the aforementioned technical problems in the prior art, embodiments of the present invention provide a prefabricated hollow composite system.

[0006] To solve the above-mentioned technical problems, the technical solution adopted in the embodiments of the present invention is as follows: A prefabricated hollow composite system, comprising: A prefabricated unit, which has multiple corrugated pipes arranged horizontally at intervals embedded inside, and the inner hole of each corrugated pipe forms a channel that penetrates the upper and lower sides of the prefabricated unit. The base unit has multiple steel bar joints that are extended and arranged laterally at intervals. The vertical connecting reinforcing bars, comprising multiple bars, are connected at their lower ends to the reinforcing bar joints via connecting sleeves. These vertical connecting reinforcing bars pass through the ducts of the precast units and extend beyond the upper side of the precast units. After the vertical connecting reinforcing bars pass through the ducts of the precast units and the lower side of the precast units aligns with the base units, concrete is poured into the ducts to form the post-cast portion. Wherein: A plurality of first anchoring components are arranged axially spaced and at least radially inward on the corrugated pipe, and a plurality of second anchoring components are arranged axially spaced and radially outward on the vertical connecting steel bars.

[0007] Preferably, the first anchoring component includes a plurality of circumferentially arranged first arms, each first arm having a first attachment section for welding to the wall of the bellows and an inner extension section extending radially inward into a channel of the prefabricated unit.

[0008] Preferably, the second anchoring component includes a first sleeve and a plurality of second arms arranged circumferentially around the first sleeve; the first sleeve is sleeved on the vertical connecting steel bar and welded and fixed to the vertical connecting steel bar; each second arm has a second attachment section for welding to the outer wall of the first sleeve and an extension section extending radially outward into a channel of the prefabricated unit.

[0009] Preferably, the prefabricated hollow composite system further includes a process sleeve; wherein: The inner extension of each first arm of each first anchoring component extends vertically upward or obliquely upward; the protruding extension of each second arm of each second anchoring component extends obliquely downward. Before the vertical connecting steel bar is connected to the steel bar joint, the process pipe sleeve is fitted over the vertical connecting steel bar; After connecting the lower end of the vertical connecting steel bar with the process sleeve to the steel bar joint, the prefabricated unit is aligned with each process sleeve and moved down so that each process sleeve passes through the bottom of each channel. Before pouring concrete into the channel, each process sleeve is pulled out of the channel from above the prefabricated unit.

[0010] Preferably, at least two expansion members are arranged at intervals in the upper middle section of the vertical connecting steel bar. Each expansion member includes a second sleeve and a plurality of expansion arms arranged circumferentially around the second sleeve. The second sleeve is sleeved on the vertical connecting steel bar and welded and fixed to the vertical connecting steel bar. Each expansion arm has a third attachment section for welding to the outer wall of the second sleeve and an expandable section that is angled to the third attachment section and extends radially outward into the channel. The diameter of the circle enclosed by the ends of the plurality of expandable sections is larger than the inner diameter of the process sleeve, so that: after the process sleeve is pulled out of the channel, the expandable section expands and its end abuts against the wall of the corrugated pipe.

[0011] Preferably, the expandable section of each expandable arm of each of the expansion components extends upward at an angle.

[0012] Preferably, the prefabricated hollow composite system further includes positioning rods, on which multiple positioning slots are arranged at intervals; wherein: Before inserting each vertical connecting steel bar with a process sleeve into each hole of the prefabricated unit, the process sleeves outside each vertical connecting steel bar are correspondingly embedded in each positioning groove of the positioning rod to limit the spacing between each process sleeve; after inserting the upper end of each process sleeve into the prefabricated unit, the positioning rod is removed from the process sleeve.

[0013] Preferably, the first boom further includes a downwardly inclined outward extension located on the opposite side of the inner extension; wherein: The corrugated pipe has circumferentially arranged wall holes, and the first arm passes through the corresponding wall holes. The first attachment section of the first arm is welded to the outer wall of the corrugated pipe, and the extension section extends into the concrete of the precast unit.

[0014] Preferably, a cap is screwed onto the upper end of the process sleeve, and the upper part of the cap is a tapered section, so that the upper end of the vertical connecting steel bar abuts against the inner side of the top of the cap.

[0015] Preferably, at least two spaced positioning posts are arranged on the base unit, and positioning blind holes corresponding to the positioning posts are arranged on the lower side of the prefabricated unit.

[0016] Compared with the prior art, the beneficial effects of the prefabricated hollow composite system disclosed in this invention are: 1. By configuring multiple first anchoring components on the corrugated pipe, and the first anchoring components including a first arm having an upwardly inclined inner extension and an inclined downward extension, it is possible to significantly improve the anchoring force that restricts the upward movement of the corrugated pipe relative to the post-cast concrete and at the same time significantly improve the anchoring force that restricts the upward movement of the precast unit relative to the corrugated pipe.

[0017] 2. By configuring multiple second anchoring components on the vertical connecting steel bars, and the second anchoring components including a second arm with a downwardly extending extension, the anchoring force that restricts the upward movement of the post-cast concrete relative to the vertical connecting steel bars can be significantly improved.

[0018] 3. By configuring expansion members in the upper middle section of the vertical connecting steel bars, after the process sleeve is pulled out of the precast unit's duct, the expansion members expand to maintain the vertical connecting steel bars in the central area of ​​the duct, thereby making the vertical connecting steel bars located in the central area of ​​the post-cast concrete.

[0019] 4. By using process sleeves around the vertical connecting reinforcement bars, the obstruction caused by the anchoring and expansion components on the corrugated pipes and vertical connecting reinforcement bars when they pass through the precast unit ducts can be effectively avoided, facilitating rapid assembly. Furthermore, the cooperation between the process sleeves and expansion components ensures that the vertical connecting reinforcement bars remain in the center of the duct before concrete pouring.

[0020] The overview of various implementations or examples of the technology described in this invention is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0021] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the invention. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0022] Figure 1 This is a three-dimensional structural diagram of the corrugated pipe in the prefabricated hollow composite system provided in an embodiment of the present invention.

[0023] Figure 2 This is a front sectional view of a prefabricated unit in a prefabricated hollow composite system provided as an embodiment of the present invention.

[0024] Figure 3 for Figure 2 A magnified view of part A.

[0025] Figure 4 This is a three-dimensional structural diagram of the vertical connecting steel bars in a prefabricated hollow composite system provided as an embodiment of the present invention.

[0026] Figure 5This is a view showing the fit between the vertical connecting steel bars and the process pipe sleeve in a prefabricated hollow composite system provided as an embodiment of the present invention.

[0027] Figure 6 A field installation process view (first state) of a prefabricated hollow composite system provided for an embodiment of the present invention.

[0028] Figure 7 A field installation process view (second state) of a prefabricated hollow composite system provided for an embodiment of the present invention.

[0029] Figure 8 A field installation process view (third state) of a prefabricated hollow composite system provided for an embodiment of the present invention.

[0030] Figure 9 A field installation process view (fourth state) of a prefabricated hollow composite system provided for an embodiment of the present invention.

[0031] Attached Figure

[0032] 10-Prefabricated unit; 11-Diameter; 12-Positioning blind hole; 20-Corrugated pipe; 21-Wall hole; 30-First anchoring component; 31-First arm; 311-Inner extension section; 312-Outer extension section; 313-First attachment section; 40-Vertical connecting steel bar; 41-External thread; 42-Hexagonal column; 50-Second anchoring component; 51-Second arm; 511-Extended section; 512-Second attachment section; 52-First sleeve; 60-Expansion component; 61-Expansion arm; 611-Expandable section; 612-Third attachment section; 62-Second sleeve; 70-Process pipe sleeve; 71-Pipe cap; 80-Base unit; 81-Steel bar joint; 811-Connecting sleeve; 82-Positioning post; 90-Positioning rod; 91-Positioning groove. Detailed Implementation

[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0035] like Figures 1 to 6 As shown, an embodiment of the present invention discloses a prefabricated hollow composite system, which includes: a base unit 80, a prefabricated unit 10, vertical connecting steel bars 40, a process pipe sleeve 70, and a positioning rod 90. The prefabricated unit 10 can be a prefabricated wall panel or a prefabricated column, etc. like Figure 6 As shown, the base unit 80 is provided with multiple spaced rebar joints 81 extending from its upper surface. These rebar joints 81 are threaded for connection to the lower ends of vertical connecting rebars 40 via connecting sleeves 811. If the base unit 80 serves as a foundation for one floor, it needs to be cast on-site. If the base unit 80 is a floor slab for more than one floor, it is prefabricated in a precast factory. Furthermore, if the base unit 80 is a floor slab, its bottom needs to be equipped with a structure for connection to the upper ends of the vertical connecting rebars 40. Figure 6 The base unit 80 shown is used as a foundation. Preferably, two positioning posts 82 are arranged at intervals on the base unit 80.

[0036] like Figure 2 As shown, the prefabricated unit 10 is prefabricated in a prefabrication plant and assembled and spliced ​​on the construction site to form a shear wall or column. During the manufacturing of the prefabricated unit 10, multiple corrugated pipes 20 arranged at intervals are pre-arranged in a mold. Then, concrete is poured into the mold. After the concrete solidifies, the corrugated pipes 20 are embedded at intervals within the prefabricated unit 10, and the holes of the corrugated pipes 20 serve as channels 11 penetrating the upper and lower sides of the prefabricated unit 10. On the construction site, each channel 11 of the prefabricated unit 10 allows the vertical connecting steel bars 40, which are already connected to the base unit 80, to pass through. Preferably, a positioning blind hole 12 is provided at the bottom of the prefabricated unit 10. When the prefabricated unit 10 is connected to the base unit 80, a positioning post 82 is inserted into the positioning blind hole 12 to position the prefabricated unit 10.

[0037] In this invention, such as Figure 1 and combined Figure 2 , Figure 3As shown, before the corrugated pipe 20 is embedded in the prefabricated unit 10, a plurality of first anchoring components 30 are arranged axially at intervals on the corrugated pipe 20. Specifically, each first anchoring component 30 includes a plurality of first arms 31 arranged circumferentially. The cross-section of the first arm 31 is rectangular, and circumferentially arranged wall holes 21 are opened on the wall of the corrugated pipe 20, so that the first arms 31 pass through the wall holes 21 on the corrugated pipe 20. In this way, the first arms 31 The bellows 20 has two rod segments located inside and outside the bellows 20. The rod segment inside the bellows 20 extends upward at an angle to form an inner extension 311, and the rod segment outside the bellows 20 extends downward at an angle to form an outer extension 312. A first attachment segment 313 is located between the outer extension 312 and the inner extension 311. The first attachment segment 313 is located on the outer wall of the bellows 20 and is welded to the outer wall. Thus, the circumferentially arranged first arm 31 is welded to the bellows 20. After the bellows 20, which is equipped with multiple first anchoring components 30, is embedded in the prefabricated unit 10, the downward-angled extension segment 312 of the circumferentially arranged first arm 31 of each first anchoring component 30 improves the anchoring effect for preventing dislocation of the prefabricated unit 10 relative to the bellows 20 due to upward movement.

[0038] In the prefabrication plant, the vertical connecting steel bars 40 are obtained by cutting, preferably, by cutting threaded steel bars, such as... Figure 4 and Figure 5 As shown, an external thread 41 is machined at the lower end of the vertical connecting steel bar 40. This external thread 41 is used to engage with the connecting sleeve 811 on the steel bar joint 81 on the base unit 80 at the construction site to achieve a mechanical connection with the steel bar joint 81. Preferably, a hexagonal column 42 is also machined on the lower end of the vertical connecting steel bar 40 to facilitate tightening with a wrench.

[0039] In this invention, such as Figure 4 and Figure 5 As shown, multiple second anchoring components 50 are arranged axially at intervals on the vertical connecting steel bar 40. Specifically, each second anchoring component 50 includes a first sleeve 52 and multiple second arms 51 arranged circumferentially along the first sleeve 52. The second arms 51 include an integrally bent second attachment section 512 and an extension section 511. The second attachment section 512 is welded and fixed to the outer wall of the first sleeve 52. The first sleeve 52 is fitted onto the vertical connecting steel bar 40, and both ends of the first sleeve 52 are fixed to the vertical connecting steel bar 40 by welding. The extension section 511 of each second arm 51 of each second anchoring component 50 extends downward at an angle. The diameter of the circle enclosed by the end of each extension section 511 of each second anchoring component 50 is smaller than the inner diameter of the process sleeve 70 for fitting around the vertical connecting steel bar 40, which will be described below. Preferably, the two ends of the first sleeve 52 are machined with recesses, and the recesses are also welded to improve the welding fixation effect.

[0040] In this invention, such as Figure 4 and Figure 5 As shown, two expansion members 60 are arranged at intervals in the upper middle section of the vertical connecting steel bar 40. The structure of the expansion member 60 is similar to that of the second anchoring member 50, that is, it includes a second sleeve 62 and a plurality of expansion arms 61 arranged circumferentially around the second sleeve. Each expansion arm 61 includes a third attachment section 612 for welding and fixing to the outer wall of the second sleeve 62 and a radially extending expandable section 611. Unlike the second anchoring member 50, each expandable section 611 extends upward at an angle, and the diameter of the circle enclosed by the ends of each expandable section 611 is larger than the inner diameter of the process sleeve 70 for sleeved outside the vertical connecting steel bar 40, which will be described below.

[0041] In this invention, before connecting the lower end of the vertical connecting steel bar 40 to the steel bar joint 81 of the base unit 80, for example, at the construction site or prefabrication plant, such as... Figure 5 As shown, a process tube sleeve 70, obtained by cutting a metal tube, is fitted around the periphery of the vertical connecting steel bar 40. Specifically, the process tube sleeve 70 is positioned, and the lower end of the vertical connecting steel bar 40, which is equipped with the second anchoring component 50 and the expansion component 60, is inserted into the process tube sleeve 70 from the upper port of the process tube sleeve 70 using a pushing device until the external thread 41 of the lower end of the vertical connecting steel bar 40 extends out by a predetermined amount. Then, a tube cap 71 with a tapered end is screwed onto the upper end of the process tube sleeve 70, and the upper end of the vertical connecting steel bar 40 abuts against the inner side of the end of the tube cap 71. At this time, the tube cap 71 limits the extension amount of the lower end of the vertical connecting steel bar 40, so that the extension amount of the lower end of all the vertical connecting steel bars 40 is consistent. Since the diameter of the circle enclosed by the ends of each protruding segment 511 of the second anchoring member 50 is smaller than the inner diameter of the process sleeve 70, the vertical connecting steel bar 40 will not be obstructed by the presence of the second anchoring member 50 when it passes through the process sleeve 70. Furthermore, although the diameter of the circle enclosed by the ends of each expandable segment 611 of the expansion member 60 is larger than the inner diameter of the process sleeve 70, the expandable segment 611 extends upwards at an inclined angle. As a result, when the vertical connecting steel bar 40 passes through the process sleeve 70, the expandable segment 611 undergoes radially inward compliant deformation, and therefore the vertical connecting steel bar 40 will not be excessively obstructed by the presence of the expansion member 60.

[0042] like Figure 7As shown, the positioning rod 90 is a reusable tool manufactured in the prefabrication plant. The positioning rod 90 has multiple spaced positioning slots 91, the spacing between which matches the spacing between the holes 11 of the prefabricated unit 10. At the construction site, after connecting the lower ends of the vertical connecting steel bars 40 (with process sleeves 70) to the steel bar joints 81 of the base unit 80, and before moving the prefabricated unit 10 downwards to insert into the vertical connecting steel bars 40, the positioning rod 90 is placed horizontally above each process sleeve 70, so that each process sleeve 70 is correspondingly embedded in the positioning slots 91 of the positioning rod 90. This temporarily corrects the position of the upper ends of the vertical connecting steel bars 40, facilitating the alignment of the upper ends of each process sleeve 70 with the holes 11 of the prefabricated unit 10, and allowing the process sleeves 70 to be smoothly inserted into the holes 11. After the upper ends of each process sleeve 70 are inserted into the holes 11, the positioning rod 90 is removed.

[0043] The following describes the construction process of building a prefabricated hollow composite system on the construction site.

[0044] First, such as Figure 6 As shown, the lower ends of each vertical connecting steel bar 40, which is fitted with a process sleeve 70, are screwed into the connecting sleeves 811 of each steel bar joint 81 of the base unit 80 to connect the vertical connecting steel bars 40. Since the upper end of the process sleeve 70 is equipped with a cap 71, the lower ends of the vertical connecting steel bars and the hexagonal column 42 are always extended out of the process sleeve 70 and the extension amount is consistent. In this way, it is convenient to tighten the hexagonal column 42 at the lower end with a wrench.

[0045] Then, as Figure 7 As shown, the positioning rod 90 is placed horizontally on the upper part of the process pipe sleeve 70 around each vertical connecting steel bar 40, and each process pipe sleeve 70 is correspondingly embedded in the positioning groove 91 of the positioning rod 90, so as to temporarily correct the distance deviation between the upper ends of each process pipe sleeve 70, so that the distance between the upper ends of each process pipe sleeve 70 is strictly consistent with the distance between the holes 11 of the prefabricated unit 10.

[0046] Then, the prefabricated unit 10 is hoisted to the top of each vertical connecting steel bar 40 using hoisting equipment, so that the lower end of each hole 11 of the prefabricated unit 10 is aligned with the upper end of each process pipe sleeve 70. Then, the prefabricated unit 10 is slowly moved down until the upper end of each process pipe sleeve 70 is inserted into each hole 11 of the prefabricated unit 10.

[0047] Then, the prefabricated unit 10 is stopped from moving downwards, and the positioning rod 90 is removed from each process sleeve 70.

[0048] Then, the prefabricated unit 10 is slowly moved down. During the downward movement, the upper end of the process sleeve 70 will pass through the inner extension section 311 of each of the second anchoring components 50 on the corrugated pipe 20 in sequence. Since the inner extension section 311 extends upward at an angle, the inner extension section 311 will hardly cause any jamming of the prefabricated unit 10 due to the radial outward compliant deformation.

[0049] Then, when the lower side of the prefabricated unit 10 is close to the positioning post 82 of the base unit 80, the position of the prefabricated unit 10 is calibrated so that the positioning blind hole 12 at the bottom of the prefabricated unit 10 is aligned with the positioning post 82, so that after the prefabricated unit 10 moves down, the positioning post 82 is inserted into the positioning blind hole 12, as shown. Figure 8 As shown, this enables the docking and positioning of the prefabricated unit 10 and the base unit 80. At this time, the upper end of each process sleeve 70 extends out of the upper side of the prefabricated unit 10.

[0050] Then, as Figure 9 As shown, each process pipe sleeve 70 is pulled out of the hole 11 of the precast unit 10 by clamping the upper end of the process pipe sleeve 70 with a clamp installed on the hoisting equipment. After the process pipe sleeve 70 is pulled out, the expandable sections 611 of the two expansion members 60 in the upper section of the vertical connecting steel bar 40 expand radially outward. After expansion, the ends of the expandable sections 611 approach or abut against the wall of the corrugated pipe 20. Thus, after the expansion members 60 expand, the vertical connecting steel bar 40 is basically located in the middle of the hole 11 of the precast unit 10. This is beneficial for the subsequent pouring of concrete to remain in the middle of the hole 11, so as to improve the anchoring effect.

[0051] Then, concrete is poured from the top of the precast unit 10 into each of its ducts 11, and the installation of the precast unit 10 is completed after the concrete has solidified.

[0052] The following describes the internal force situation of the system when subjected to lateral force, and thereby illustrates the advantages of the system provided by the present invention.

[0053] When the precast unit 10 is subjected to a lateral force, the lateral force causes the post-cast concrete to tend to move upward relative to the vertical connecting steel bar 40, the corrugated pipe 20 to tend to move upward relative to the post-cast concrete, and the precast unit 10 to tend to move upward relative to the corrugated pipe 20.

[0054] In this invention, by arranging a plurality of first anchoring members 30 on the corrugated pipe 20, and the first anchoring member 30 including a first arm 31 having an upwardly inclined inner extension 311 and an inclined downwardly inclined outer extension 312, the anchoring force that restricts the upward movement of the corrugated pipe 20 relative to the post-cast concrete and the anchoring force that restricts the upward movement of the precast unit 10 relative to the corrugated pipe 20 can be significantly improved.

[0055] In this invention, by arranging a plurality of second anchoring members 50 on the vertical connecting steel bar 40, and the second anchoring member 50 including a second arm 51 having a downwardly extending extension 511, the anchoring force that restricts the upward movement of the post-cast concrete relative to the vertical connecting steel bar 40 can be significantly improved.

[0056] In this invention, by providing an expansion member 60 in the upper middle section of the vertical connecting steel bar 40, after the process sleeve 70 is pulled out from the hole 11 of the precast unit 10, the expansion member 60 expands to maintain the vertical connecting steel bar 40 in the central region of the hole 11, thereby making the vertical connecting steel bar 40 located in the central region of the post-cast concrete.

[0057] In this invention, by sleeved with a process tube sleeve 70 around the vertical connecting steel bar 40, the obstruction caused by the anchoring components and expansion components 60 on the corrugated pipe 20 and the vertical connecting steel bar 40 when passing through the hole 11 of the prefabricated unit 10 can be effectively avoided, which is beneficial for rapid assembly. In addition, the cooperation between the process tube sleeve 70 and the expansion component 60 ensures that the vertical connecting steel bar 40 is maintained in the central area of ​​the hole 11 before the concrete is poured.

[0058] Furthermore, although exemplary embodiments have been described in this invention, their scope includes any and all embodiments based on the invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and such examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the full scope of the following claims and their equivalents.

[0059] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments may be used by those skilled in the art upon reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature, which is not claimed, is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of the particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is independently considered as a separate embodiment, and these embodiments are contemplated as being possible in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0060] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A prefabricated hollow composite system, characterized in that, include: A prefabricated unit, which has multiple corrugated pipes arranged horizontally at intervals embedded inside, and the inner hole of each corrugated pipe forms a channel that penetrates the upper and lower sides of the prefabricated unit. The base unit has multiple steel bar joints that are extended and arranged laterally at intervals. The vertical connecting steel bars include multiple bars, and the lower end of each vertical connecting steel bar is connected to the steel bar joint through a connecting sleeve. The vertical connecting steel bars are used to pass through the holes of the precast unit and extend out of the upper side of the precast unit. After the vertical connecting steel bars pass through the holes of the precast unit and the lower side of the precast unit is connected to the base unit, concrete is poured into the holes to form the post-cast part. Multiple first anchoring components are arranged axially spaced and radially protruding inward on the corrugated pipe, and multiple second anchoring components are arranged axially spaced and radially protruding outward on the vertical connecting steel bars. The first anchoring component includes a plurality of first arms arranged circumferentially, each first arm having a first attachment section for welding to the wall of the bellows and an inner extension section extending radially inward into a channel of the prefabricated unit. The second anchoring component includes a first sleeve and a plurality of second arms arranged circumferentially around the first sleeve; the first sleeve is sleeved on the vertical connecting steel bar and welded and fixed to the vertical connecting steel bar; each second arm has a second attachment section for welding to the outer wall of the first sleeve and an extension section that extends radially outward into a channel of the prefabricated unit; The prefabricated hollow composite system also includes process tubing; The inner extension of each first arm of each first anchoring component extends vertically upward or obliquely upward; the protruding extension of each second arm of each second anchoring component extends obliquely downward. Before the vertical connecting steel bar is connected to the steel bar joint, the process pipe sleeve is fitted over the vertical connecting steel bar; After connecting the lower end of the vertical connecting steel bar with the process sleeve to the steel bar joint, the prefabricated unit is aligned with each process sleeve and moved down so that each process sleeve passes through the bottom of each channel. Before pouring concrete into the channel, each process sleeve is pulled out of the channel from above the prefabricated unit.

2. The prefabricated hollow composite system according to claim 1, characterized in that, At least two expansion members are arranged at intervals in the upper middle section of the vertical connecting steel bar. Each expansion member includes a second sleeve and a plurality of expansion arms arranged circumferentially around the second sleeve. The second sleeve is sleeved on the vertical connecting steel bar and welded and fixed to the vertical connecting steel bar. Each expansion arm has a third attachment section for welding to the outer wall of the second sleeve and an expandable section that is angled to the third attachment section and extends radially outward into the channel. The diameter of the circle enclosed by the ends of the plurality of expandable sections is larger than the inner diameter of the process sleeve. Thus, after the process sleeve is pulled out of the channel, the expandable section expands and its end abuts against the wall of the corrugated pipe.

3. The prefabricated hollow composite system according to claim 2, characterized in that, Each expandable segment of each expandable arm of each of the aforementioned expandable components extends at an upward angle.

4. The prefabricated hollow composite system according to claim 1, characterized in that, The prefabricated hollow composite system also includes positioning rods, on which multiple positioning slots are arranged at intervals; wherein: Before inserting each vertical connecting steel bar with a process sleeve into each hole of the prefabricated unit, the process sleeves outside each vertical connecting steel bar are correspondingly embedded in each positioning groove of the positioning rod to limit the spacing between each process sleeve; after inserting the upper end of each process sleeve into the prefabricated unit, the positioning rod is removed from the process sleeve.

5. The prefabricated hollow composite system according to claim 1, characterized in that, The first boom also includes a downwardly inclined extension located on the opposite side of the inner extension; wherein: The corrugated pipe has circumferentially arranged wall holes, and the first arm passes through the corresponding wall holes. The first attachment section of the first arm is welded to the outer wall of the corrugated pipe, and the extension section extends into the concrete of the precast unit.

6. The prefabricated hollow composite system according to claim 1, characterized in that, The upper end of the process pipe sleeve is screwed with a pipe cap, the upper part of which is a tapered section; so that the upper end of the vertical connecting steel bar abuts against the inner side of the top of the pipe cap.

7. The prefabricated hollow composite system according to claim 1, characterized in that, At least two spaced positioning posts are arranged on the base unit, and positioning blind holes corresponding to the positioning posts are arranged on the lower side of the prefabricated unit.

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