Connecting structure of wall body and roof in non-standard 3D printing building

Abstract

The utility model provides a connecting structure of a wall body and a roof in a non-standard 3D printing building, and relates to the technical field of 3D printing buildings. The wall body part with the positioning cavity, the connecting base with the central channel, the ring beam part formed by filling and the force transmission component are arranged to form a complete connecting system. The exterior of the connecting base is wrapped and fixed by concrete of the ring beam part, so that the firmness of connection is ensured; the lower end part of the force transmission component is fixedly connected in the central channel of the connecting base, and the upper end part of the force transmission component is connected with the roof part, so that the load of the roof part is effectively transmitted to the ring beam part and the wall body part. The positioning cavity is accurately formed through the 3D printing technology, accurate positioning of the connecting base and one-time pouring forming of the ring beam part are achieved, and therefore the construction process of connection of the wall body and the roof in the special-shaped building is obviously simplified, and the construction efficiency and the construction precision are improved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing building technology, and in particular to a connection structure between walls and roof in a non-standard 3D printed building. Background Technology

[0002] 3D printing technology offers an efficient solution for constructing non-standard, irregularly shaped wall structures. However, this technology faces bottlenecks when dealing with large-span, complex three-dimensional curved roof structures. The printing process is prone to instability, and the printing path planning is complex, resulting in low efficiency, high cost, and insufficient reliability. Fiber-reinforced polymer (FRP) roofs, with their advantages of being lightweight, high-strength, highly malleable, and easy to prefabricate in factories, have become an ideal alternative to 3D-printed concrete roofs, enabling the construction of a composite structural system of 3D-printed irregularly shaped walls + FRP prefabricated roofs.

[0003] The core technological challenge of the composite structural system of 3D-printed irregular-shaped walls and FRP prefabricated roofs lies in how to achieve an effective connection between these two heterogeneous components. In traditional standard rectangular buildings, this is usually achieved by pre-embedding steel cages within the walls and then casting and anchoring them to connectors within the roof. However, in irregular-shaped structures, the complex geometry of the walls makes the configuration and positioning of traditional steel cages difficult, hindering the implementation of this construction. Existing technologies have the following drawbacks: First, in complex irregular-shaped structures, construction and installation errors are unavoidable, leading to difficulties in precisely controlling gaps at component joints. This results in an abrupt and discontinuous interface between concrete and FRP, affecting the building's overall completion. Second, construction errors can lead to weak waterproofing design at joint nodes, and the complex curved surfaces further increase the difficulty of achieving reliable waterproof sealing. Third, due to the high difficulty and cost of fabricating steel cages in irregular-shaped buildings, cast-in-place UHPC (ultra-high performance concrete) ring beams are preferable as an alternative. However, without steel cages as a positioning reference, accurately positioning the embedded parts is also a challenge. Inaccurate positioning of the embedded parts will further increase construction errors.

[0004] Therefore, there is an urgent need for a special connection structure that does not rely on traditional steel reinforcement and can adapt to complex shapes, so as to promote the practical application of this composite structure system. Utility Model Content

[0005] In view of this, the technical problem to be solved by this utility model is: how to provide a wall and roof connection structure suitable for non-standard irregular 3D printed buildings, which can realize reliable connection of heterogeneous materials, effectively hide seams and ensure waterproof sealing, while simplifying the construction process and improving the positioning accuracy and construction efficiency of embedded parts in complex shapes.

[0006] This utility model provides a connection structure between a wall and a roof in a non-standard 3D printed building, comprising: a wall section, the top area of ​​which forms a positioning cavity; a connecting base, disposed within the positioning cavity, the connecting base including a through central channel; a ring beam section, the ring beam section including a concrete layer filling the positioning cavity and enclosing the connecting base; a force transmission member, the lower end of which is located inside the central channel of the connecting base, the force transmission member being fixedly connected to the connecting base; and the upper end of which is used to connect to the roof section.

[0007] Preferably, the connecting base further includes a positioning part, which includes a plurality of positioning limbs extending downward from the body of the connecting base, the positions of which correspond to the geometric feature points of the support structure inside the wall portion.

[0008] Preferably, the force transmission component includes a reinforcing structure, which includes a plurality of protrusions disposed on the side of the force transmission component and connected to the connecting base.

[0009] Preferably, the edges of the connecting base have an interlocking structure.

[0010] Preferably, the roof portion includes a cantilevered portion extending horizontally outward from the wall portion.

[0011] Preferably, the ends of the cantilevered portion of the roof curve downwards to form an integrated drip line structure.

[0012] Preferably, an operating gap is reserved between the cantilevered portion of the roof and the outer surface of the wall.

[0013] Preferably, a caulking and sealing layer is provided within the operating gap.

[0014] Preferably, the wall portion includes a first wall segment formed by printing in the first stage and a second wall segment formed by printing in the second stage. The first wall segment and the second wall segment are bonded together by an interface layer, and the positioning cavity is located at the top of the second wall segment.

[0015] Preferably, the interior of the first wall section is filled with thermal insulation material.

[0016] The following are the beneficial effects of implementing this utility model: This utility model constitutes a complete connection system by setting a wall section with a positioning cavity, a connecting base with a central channel, a ring beam section formed by filling, and a force-transmitting component. The connecting base is externally encased and fixed by the concrete of the ring beam section, ensuring the firmness of the connection; the lower end of the force-transmitting component is fixedly connected to the central channel of the connecting base, and the upper end is connected to the roof section, thereby effectively transferring the load of the roof section to the ring beam section and the wall section. This utility model avoids the complex process of binding traditional steel cages in irregularly shaped walls. By using 3D printing technology to precisely form the positioning cavity, it achieves accurate positioning of the connecting base and one-time casting of the ring beam section, thus significantly simplifying the construction process of connecting the wall and the roof in irregularly shaped buildings, improving construction efficiency and construction accuracy, and ultimately achieving a reliable connection between the wall and the roof in irregularly shaped buildings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure of the present invention in one embodiment;

[0018] Figure 2 This is a top view of one embodiment of the present invention, omitting the roof portion of the connecting structure;

[0019] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0020] In the picture:

[0021] 1. Wall section; 101. Supporting structure; 102. Geometric feature point; 2. Insulation layer; 3. Interface layer; 4. Connecting base; 41. Interlocking structure; 42. Central channel; 5. Positioning section; 6. Ring beam section; 7. Force transmission component; 8. Reinforcing structure; 9. Roof section; 10. Drip line construction; 11. Operating gap; A. First wall section; B. Second wall section; C. Embedded roof section. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The step numbers in the following embodiments are only for ease of explanation and do not limit the order of the steps. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.

[0023] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Example 1

[0026] like Figure 1 and Figure 2 The diagram illustrates a non-standard 3D-printed building structure for connecting a wall to a roof, comprising: a wall section 1, the top region of which forms a positioning cavity; a connecting base 4, disposed within the positioning cavity, the connecting base 4 including a through central channel 42; a ring beam section 6, the ring beam section 6 including a concrete layer filling the positioning cavity and enclosing the connecting base 4; a force transmission member 7, the lower end of which is located inside the central channel 42 of the connecting base 4, the force transmission member 7 being fixedly connected to the connecting base 4; and the upper end of which is used to connect to a roof section 9.

[0027] In this embodiment, a complete connection system is formed by setting a wall section 1 with a positioning cavity, a connecting base 4 with a central channel 42, a ring beam section 6 formed by filling, and a force transmission component 7. The connecting base 4 is externally encased and fixed by the concrete of the ring beam section 6, ensuring the firmness of the connection; the lower end of the force transmission component 7 is fixedly connected to the central channel 42 of the connecting base 4, and the upper end of the force transmission component 7 is connected to the inner wall of the roof section 9, thereby effectively transferring the load of the roof section 9 to the ring beam section 6 and the wall section 1. This utility model avoids the complicated process of binding traditional steel cages in irregularly shaped walls. It uses 3D printing technology to precisely form the wall section 1 with a positioning cavity, realizing the precise positioning of the connecting base 4 and the one-time casting of the ring beam section 6, thereby significantly simplifying the construction process of connecting the wall and the roof in irregularly shaped buildings and improving construction efficiency and construction accuracy.

[0028] Example 2

[0029] Based on Embodiment 1, this embodiment provides an optional solution for the specific structure of the connecting base.

[0030] In this embodiment, as Figure 2 and Figure 3 As shown, the edge of the connecting base 4 has an interlocking structure 41, which has an alternating concave-convex structure. Before forming the ring beam portion 6, the connecting base 4 is embedded in the positioning cavity at the top of the wall portion 1, so that when the concrete constituting the ring beam portion 6 is filled, it interlocks with the interlocking structure 41 of the connecting base 4. The connecting base 4 forms a mechanical interlock with the concrete of the ring beam portion 6 through its interlocking structure 41, ensuring the firmness of the connection.

[0031] In this embodiment, the connecting base 4 further includes a positioning part 5, which includes a plurality of positioning limbs extending downward from the body of the connecting base 4. The positions of the positioning limbs correspond to the geometric feature points 102 of the support structure 101 inside the wall part 1.

[0032] In this embodiment, as Figure 2 and Figure 3 As shown, before the connecting base 4 is placed, the support structure 101 is integrally formed with the wall part 1 by 3D printing. The support structure 101 includes a straight section and a turning section. The corners of the straight section and the turning section form geometric feature points 102. The positioning part 5 positions the connecting base 4 by pressing against the geometric feature points 102.

[0033] In this embodiment, the positioning part 5 is a columnar structure.

[0034] In this embodiment, the wall section 1 is printed in stages from bottom to top. In the first stage, the wall is printed to the position where the ring beam is to be installed, forming the first wall section A, and the support structure 101 is integrally formed in the inner cavity of the wall section 1. After printing, insulation material is filled into the cavity between the inner wall of the wall section 1 and the support structure 101 to form an insulation layer 2. In the second stage, an interface adhesive is first laid on the top surface of the first wall section A to form an interface layer 3, and then printing continues to form the second wall section B. The interface layer 3 is used to ensure the bonding strength between the second wall section B and the first wall section A. The second wall section B still includes the support structure 101 integrally printed with the wall section 1, but the insulation layer 2 is not filled between the wall section 1 and the support structure 101 of the second wall section B. After the second wall section B is constructed, a connecting base 4 is embedded between the inner wall of the wall part 1 of the second wall section B and the supporting structure 101, and then UHPC is poured to form the ring beam part 6.

[0035] In this embodiment, the interlocking structure 41 of the connecting base 4 is a plate-like structure located at the top of the central channel 42, with its edges exhibiting an alternating concave-convex arrangement. After the top of the second cavity section B is printed, the interlocking structure 41 is placed on top of the second cavity section B, and the connecting base 4 is positioned and installed. After the connecting base 4 is placed, the wall continues to be printed along the contour of the wall portion 1 at the top of the second cavity section B, forming the buried top section C, so that the entire connecting base 4 is included within the positioning cavity of the wall portion 1. Finally, during casting, the topmost interlocking structure 41 of the connecting base 4 is also covered by the casting material, so that the interlocking structure 41 and the ring beam portion 6 formed by the casting material form a mechanical interlock, thereby allowing the entire connecting base 4 to be more completely encased within the casting material.

[0036] In this embodiment, the interface layer 3 is a concrete interface treatment agent that conforms to the standard "JC / T 907-2018" and has an original shear bond strength of not less than 1.5MPa. Before spraying, the top surface of the first wall section A is cleaned and moistened.

[0037] In this embodiment, by setting a positioning part 5, the multiple positioning limbs of the positioning part 5 correspond to the geometric feature points 102 of the internal support structure 101 of the wall, so that the connecting base 4 can be accurately aligned and fixed during installation by means of the internal structure already formed during the wall printing. This effectively solves the technical problem of the connecting base 4 being difficult to accurately position on a free-form wall, and further ensures the installation accuracy and reliability of the entire connection node.

[0038] In this embodiment, by filling the interior of the first wall section A with thermal insulation material, the overall thermal insulation performance of the wall is improved, so that the connection structure can meet the structural connection requirements while taking into account the thermal performance requirements of the building, making it suitable for buildings with energy-saving requirements.

[0039] In this embodiment, by printing the wall section 1 in two stages and bonding them together with an interface agent, the first wall section A can focus on load-bearing and heat insulation functions, while the second wall section B focuses on forming a structural cavity for connecting the roof section 9.

[0040] Example 3

[0041] This embodiment provides an optional solution for the specific structure of the force transmission component, based on any of the above embodiments.

[0042] In this embodiment, the force transmission member 7 includes a reinforcing structure 8, which includes a plurality of protrusions disposed on the side of the force transmission member 7 and connected to the connecting base 4.

[0043] In this embodiment, the force transmission component 7 is a square steel column structure, and the lower end of the force transmission component 7 enters the central channel 42 of the connecting base 4. Reinforcing structures 8 are provided on all four sides of the force transmission component 7. Specifically, the reinforcing structure 8 is a triangular rib. After the force transmission component 7 and the connecting base 4 are positioned, the reinforcing structure 8 can be welded or bolted to the connecting base 4 to achieve the positioning and installation of the force transmission component 7.

[0044] In this embodiment, by providing a reinforcing structure 8 on the side of the force transmission member 7, the contact area and connection strength between the force transmission member 7 and the connecting base 4 are increased. When fixed by welding, multiple protrusions provide more welding points, making the connection more robust and enhancing the integrity and shear resistance of the node.

[0045] Example 4

[0046] This embodiment provides an optional solution for the specific structure of the roof, based on any of the above embodiments.

[0047] In this embodiment, as Figure 1 As shown, the roof section 9 includes a cantilevered portion extending horizontally outward from the wall section 1. The end of the cantilevered portion of the roof section 9 curves downward to form an integrated drip line structure 10. An operating gap 11 is provided between the cantilevered portion of the roof section 9 and the outer surface of the wall section 1.

[0048] Preferably, the width of the operating gap 11 is in the range of 50mm to 200mm.

[0049] In this embodiment, a caulking and sealing layer is provided in the operating gap 11 to seal the gap between the roof part 9 and the top of the side wall of the wall part 1.

[0050] In this embodiment, by including a cantilevered portion that extends horizontally outward from the wall portion 1 in the roof portion 9, the cantilevered portion can guide rainwater to drip away from the outer surface of the wall, thus preventing rainwater from flowing directly down the wall and protecting the wall and reducing the risk of leakage.

[0051] In this embodiment, the upper end of the force transmission component 7 is provided with threads or openings, and is detachably connected to the pre-embedded connecting sleeve or connecting plate in the roof part 9 by high-strength bolts.

[0052] In other embodiments, the force transmission member 7 can also be bonded to the roof portion 9 as a whole using structural adhesive.

[0053] In this embodiment, by bending the end of the cantilevered portion of the roof 9 downward to form an integrated drip line structure 10, the path of rainwater dripping can be further constrained, ensuring that rainwater is cut off and drips at the edge of the cantilevered end, effectively preventing rainwater from flowing back to the wall surface due to capillary action or wind, thus enhancing the waterproof effect.

[0054] In this embodiment, by reserving the operating gap 11, sufficient space is provided for construction personnel to install, adjust, and subsequently seal the roof section 9, reducing the construction difficulty at complex curved surface nodes and ensuring construction quality.

[0055] In this embodiment, by limiting the width of the operating gap to 50mm~200mm, sufficient operating space is ensured while avoiding excessive gaps that could affect the building's aesthetics or structural performance. Within this range, a good balance can be struck between construction convenience and the overall integrity of the building.

[0056] In this embodiment, by setting a caulking and sealing layer in the operating gap 11, the gap between the roof part 9 and the wall part 1 can be effectively filled, blocking the penetration path of rainwater and air, completing the entire waterproof sealing system, and ensuring the long-term durability of the connection node.

[0057] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A connecting structure of a wall and a roof in a non-standard 3D printed building, characterized in that, The wall body (1) includes a positioning cavity formed in the top area; The connecting base (4) is arranged in the positioning cavity, and the connecting base (4) includes a central passage (42) penetrating through; The ring beam part (6) includes a concrete layer filled in the positioning cavity and wrapping the connecting base (4); The force transmission member (7) has a lower end arranged inside the central passage (42) of the connecting base (4), and the force transmission member (7) is fixedly connected with the connecting base (4); and an upper end of the force transmission member (7) is used for connecting the roof part (9).

2. The connecting structure of a wall body and a roof in a non-standard 3D printing building according to claim 1, wherein the connecting base (4) further includes a positioning part (5), the positioning part (5) includes a plurality of positioning limbs extending downward from the body of the connecting base (4), and the positions of the positioning limbs correspond to geometric feature points (102) of a support structure (101) inside the wall body (1).

3. The connecting structure of a wall body and a roof in a non-standard 3D printing building according to claim 1 or 2, wherein the force transmission member (7) includes a reinforcing structure (8), the reinforcing structure (8) includes a plurality of protruding parts arranged on the side of the force transmission member (7) and connected with the connecting base (4). The edge of the connecting base (4) has a snap structure (41). The roof part (9) includes an overhanging part extending horizontally to the outside of the wall body (1). The end of the overhanging part of the roof part (9) is bent downward to form an integrated drip line structure (10).

4. The connecting structure of the wall and the roof in the non-standard 3D printing building according to claim 1, wherein, An operation gap (11) is reserved between the overhanging part of the roof part (9) and the outer surface of the wall body (1).

5. The connecting structure of wall and roof in the non-standard 3D printing building according to claim 1, characterized in that, A caulking sealing layer is arranged in the operation gap (11).

6. The connecting structure of the wall and the roof in the non-standard 3D printing building according to claim 5, characterized in that, The wall body (1) includes a first wall body section (A) formed by first-stage printing and a second wall body section (B) formed by second-stage printing, the first wall body section (A) and the second wall body section (B) are bonded through an interface layer (3), and the positioning cavity is located at the top of the second wall body section (B).

7. The connecting structure of wall and roof in the non-standard 3D printing building according to claim 1 or 4, characterized in that, A heat preservation layer (2) is arranged inside the first wall body section (A).

8. The connecting structure of the wall and the roof in the non-standard 3D printing building according to claim 7, characterized in that, ​ 9.The connecting structure of wall and roof in the non-standard 3D printing building of claim 1, wherein, ​ 10. The connection structure of the wall and the roof in the non-standard 3D printing building according to claim 9, characterized in that, ​

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