Cavity formwork independent foundation

Abstract

The utility model relates to the technical field of concrete construction discloses cavity template independent foundation, including first cavity prefabricated component, including by the outside to the inside interval setting first outer formwork, second outer formwork, the second outer formwork surrounds and forms first space, forms first cavity between first outer formwork and second outer formwork, be equipped with a plurality of first opening on the second outer formwork, and first opening communicates first cavity and first space, second cavity prefabricated component, second cavity prefabricated component includes by the outside to the inside interval setting first inner formwork, second inner formwork, and the second inner formwork surrounds and forms second space, forms second cavity between first inner formwork and second inner formwork, be equipped with a plurality of second opening on the first inner formwork, be equipped with a plurality of third opening on the second inner formwork, and second opening communicates second cavity and first space, and third opening communicates second cavity and second space, the utility model has solved the problem that the cavity template basis inside easy to produce cavity or not dense of current.

Description

Technical Field

[0001] This utility model relates to the field of concrete foundation construction technology, specifically to a cavity formwork independent foundation. Background Technology

[0002] Traditional cast-in-place isolated foundation construction often employs systems such as wooden formwork, steel formwork, aluminum formwork, or plastic formwork. These systems suffer from drawbacks such as complex formwork setup, insufficient guarantee of concrete fluidity, and susceptibility to quality problems. While some hollow formwork components are used in existing technologies, these techniques are primarily applied to floor slab structures and are not optimized for the characteristics of isolated foundations. In particular, there is a lack of effective solutions to improve concrete fluidity, leading to voids or loose foundations within the foundation, affecting the overall stability and construction quality. Utility Model Content

[0003] This utility model provides an independent cavity formwork foundation to solve the problem that existing cavity formwork foundations are prone to voids or lack of compactness, which affects the stability and construction quality of the entire foundation.

[0004] This utility model provides an independent foundation for a cavity template, comprising: First supporting component; The first cavity prefabricated component is disposed on the outer edge of the first support component. The first cavity prefabricated component includes a first outer template, a second outer template, and a first tie member for connecting the first outer template and the second outer template, which are spaced apart from the outside to the inside. The second outer template encloses and forms a first space. A first cavity is formed between the first outer template and the second outer template. The second outer template is provided with a plurality of first openings, which connect the first cavity and the first space. The second cavity prefabricated component is spaced apart within the second outer template and fixed to the first support component. The horizontal height of the second cavity prefabricated component is higher than that of the first cavity prefabricated component. The second cavity prefabricated component includes a first inner template, a second inner template, and a second tie member for connecting the first inner template and the second inner template, which are spaced apart from the outside to the inside. The second inner template encloses a second space, and a second cavity is formed between the first inner template and the second inner template. The first inner template has a plurality of second openings, and the second inner template has a plurality of third openings. The second openings connect the second cavity and the first space, and the third openings connect the second cavity and the second space. The horizontal height of the highest point of the first opening and the second opening is lower than the horizontal height of the highest point of the first outer template, and the horizontal height of the highest point of at least some of the third openings is higher than the horizontal height of the highest point of the second opening.

[0005] Beneficial Effects: In this invention, the outermost first outer template is a closed structure. The innermost second outer template and the first inner template each have a first opening and a second opening at the same horizontal height. The innermost second inner template has a third opening at a higher horizontal height than the second opening. This allows concrete to flow sequentially through the third opening, the second opening, and the first opening into the second cavity, the first space, and the first cavity, uniformly filling the entire cavity and preventing voids or gaps. Furthermore, because the highest point of the precast component in the second cavity is higher than that in the first cavity, the third opening is positioned higher to ensure that the upper layer of concrete in the second space can flow smoothly into the second cavity. Simultaneously, because the first inner template has a second opening at a lower horizontal position, the concrete in the second cavity will not overflow into the first space, ensuring the formation of the intended foundation structure. Furthermore, the foundation of this utility model is a prefabricated component, which is easy to install, eliminates the need for on-site formwork time and reliance on skilled workers, and greatly shortens the construction period. It can be applied to stepped independent foundations, high-step side formwork, etc., and can also be applied to conical independent foundations, making it highly adaptable.

[0006] In one alternative embodiment, the third opening includes a low opening with the same height as the first and second openings, and a high opening disposed above the low opening.

[0007] The low-perforation design ensures that the concrete in the lower layer of the second space can smoothly enter the second cavity through the low-perforation design, while the high-perforation design ensures that the concrete in the upper layer of the second space can smoothly enter the second cavity through the high-perforation design, thereby improving the flow efficiency and flow uniformity of the concrete.

[0008] In one optional embodiment, both the first cavity prefabricated component and the second cavity prefabricated component include a strip template and two corner templates respectively disposed at both ends of the strip template along its length direction. The strip template and the corner templates are connected by a first connecting structure.

[0009] The first and second cavity prefabricated components are formed by splicing strip templates and corner templates, realizing modular production, facilitating transportation, reducing costs, and the corner modules ensure the connection strength at the corners of the foundation.

[0010] In one optional embodiment, the first connecting structure includes a protrusion and a recess on the connecting surface of the strip template and the corner template, wherein the protrusion and the recess overlap and engage with each other.

[0011] The overlapping design of the convex and concave parts improves the connection efficiency of strip templates and corner templates, while ensuring sealing performance and overall rigidity.

[0012] In one alternative embodiment, a second support member is provided in the second space, the second support member being adapted to be connected to a prefabricated cavity column.

[0013] The installation of the second support component facilitates the connection between the foundation and the precast hollow column, improving the overall construction efficiency.

[0014] In one alternative embodiment, the first supporting member is a steel mesh, and the second supporting member includes horizontal and vertical bars arranged perpendicularly to each other, as well as a first connecting bar, which is connected to both the horizontal bars and the steel mesh.

[0015] The second supporting member is connected to the first supporting member by the first connecting rib. The connection method is simple, low-cost, and can also ensure connection strength.

[0016] In one alternative embodiment, the first connecting bar includes a first portion connected to the transverse bar and a second portion connected to the bottom steel mesh, the first portion and the second portion being perpendicular to each other.

[0017] The first connecting bar consists of two parts that are perpendicular to each other, which further improves construction efficiency while ensuring connection strength.

[0018] In one alternative embodiment, the second support member further includes a joint adapted to be connected to a precast hollow column, the joint being located at the top of the vertical rib.

[0019] By connecting to the precast hollow column through the joint, other connecting components are saved, balancing construction efficiency and strength.

[0020] In one alternative embodiment, the second cavity prefabricated component is connected to the bottom steel mesh via a second connecting structure.

[0021] The second connection structure ensures that the position of the second cavity precast component will not shift during concrete pouring, thereby ensuring the construction quality of the entire foundation.

[0022] In one optional embodiment, the second connecting structure includes a second connecting bar and a third connecting bar that are connected to each other. The second connecting bar is horizontally disposed on the inner wall of the first inner template and the second inner template near the bottom of the reinforcing mesh, and the other end of the third connecting bar is connected to the bottom of the reinforcing mesh.

[0023] The second and third connecting ribs have simple structures, are easy to implement, and have low costs. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an independent foundation for a cavity template according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the longitudinal section; Figure 3 for Figure 1 A top-down view; Figure 4 This is a schematic diagram of the corner template of the first cavity prefabricated component according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the strip template of the first cavity prefabricated component according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the corner template of the second cavity prefabricated component according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the strip template of the second cavity prefabricated component according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the prefabricated hollow column according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. First supporting component; 2. First cavity prefabricated component; 201. First outer template; 202. Second outer template; 2021. First opening; 203. First connector; 204. First space; 205. First cavity; 3. Second cavity prefabricated component; 301. First inner template; 3011. Second opening; 302. Second inner template; 3021. Third opening; 30211. Low hole; 30212. High hole; 303. Second connector; 304. 305. Second cavity; 306. Second connecting structure; 3061. Second connecting bar; 3062. Third connecting bar; 3063. Clamping head; 4. Right angle support; 5. Strip template; 6. Corner template; 7. First connecting structure; 701. Protrusion; 702. Recess; 8. Second supporting member; 801. Horizontal bar; 802. Vertical bar; 803. First connecting bar; 804. Joint; 9. Precast cavity column; 901. Precast column; 902. Column reinforcement. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Traditional precast independent foundations are constrained by transportation limitations, making it impossible to manufacture ultra-large components. Generally, heavy components have high transportation and hoisting costs due to their large individual weight, thus increasing the overall construction cost. This invention aims to address the shortcomings of existing technologies by providing a cavity formwork independent foundation that offers high construction efficiency, stable quality, and is suitable for conical foundations, stepped foundations, and high-step side formwork.

[0029] The following is combined with Figures 1 to 8 The following describes embodiments of the present invention.

[0030] According to an embodiment of this utility model, a cavity template independent foundation is provided, comprising: First supporting component 1; The first cavity prefabricated component 2 is disposed on the outer edge of the first support component 1. The first cavity prefabricated component 2 includes a first outer template 201 and a second outer template 202 arranged at intervals from the outside to the inside, and a first tie member 203 for connecting the first outer template 201 and the second outer template 202. The second outer template 202 encloses to form a first space 204. A first cavity 205 is formed between the first outer template 201 and the second outer template 202. The second outer template 202 is provided with a plurality of first openings 2021, and the first openings 2021 connect the first cavity 205 and the first space 204. The second cavity prefabricated component 3 is spaced apart within the second outer template 202 and fixed to the first support component 1. The horizontal height of the second cavity prefabricated component 3 is higher than that of the first cavity prefabricated component 2. The second cavity prefabricated component 3 includes a first inner template 301 and a second inner template 302 spaced apart from the outside to the inside, and a second tie member 303 for connecting the first inner template 301 and the second inner template 302. The second inner template 302 encloses to form a second space 304, and a second cavity is formed between the first inner template 301 and the second inner template 302. 305, the first inner template 301 is provided with a plurality of second openings 3011, and the second inner template 302 is provided with a plurality of third openings 3021. The second openings 3011 connect the second cavity 305 and the first space 204, and the third openings 3021 connect the second cavity 305 and the second space 304. The highest point of the first opening 2021 and the second opening 3011 is lower than the highest point of the first outer template 201, and at least some of the highest points of the third openings 3021 are higher than the highest points of the second openings 3011.

[0031] The first support member 1 is located at the bottom of the entire foundation to provide support. It is typically square, but can also be rectangular or other shapes depending on actual construction needs; no specific limitations are made here. The first cavity prefabricated member 2 and the second cavity prefabricated member 3 have the same shape as the first support member 1, and the first cavity prefabricated member 2 is fixed to the outer edge of the first support member 1 by additional diagonal or right-angle supports 4, such as... Figures 1 to 3 As shown. The first cavity precast component 2 and the second cavity precast component 3 are prefabricated in the factory and only require simple assembly upon arrival at the construction site, improving construction efficiency. The first outer formwork 201, the second outer formwork 202, the first inner formwork 301, and the second inner formwork 302 are all prefabricated using any one of ultra-high performance concrete (UHPC), glass fiber reinforced cement (GRC), or high-performance composite materials to ensure sufficient strength and durability. The second outer formwork 202, the first inner formwork 301, and the second inner formwork 302 have evenly distributed first openings 2021, second openings 3011, and third openings 3021. The spacing between the openings is adjusted according to the concrete's fluidity. The shape of the openings can be rectangular, square, circular, elliptical, etc. In this embodiment, a rectangular shape is preferred, but no specific limitation is made. The first outer formwork 201 has no openings to prevent concrete leakage.

[0032] Beneficial effects: In the present invention, the outermost first outer template 201 is a closed structure. The innermost second outer template 202 and the first inner template 301 are respectively provided with a first opening 2021 and a second opening 3011 with the same horizontal height at their highest points. The innermost second inner template 302 is provided with a third opening 3021 with a higher horizontal height at its highest point than the second opening 3011. In this way, when concrete is poured into the center of the foundation, the concrete can flow into the second cavity 305, the first space 204 and the first cavity 205 in sequence through the third opening 3021, the second opening 3011 and the first opening 2021, so as to uniformly fill the entire cavity and avoid the formation of voids or loose structures. Furthermore, since the highest point of the second cavity precast component 3 is higher than the highest point of the first cavity precast component 2, the position of part of the third opening 3021 is set higher to ensure that the upper layer of concrete in the second space 304 can flow smoothly into the second cavity. Simultaneously, because the first inner formwork 301 has a second opening 3011 with a lower highest point, the concrete in the second cavity will not overflow into the first space 204, ensuring the formation of the intended foundation structure. In addition, the foundation of this invention is a precast component, which is easy to install, eliminates the need for on-site formwork time and reliance on skilled workers, significantly shortens the construction period, and can be applied to stepped independent foundations, high-step side formwork, and also to conical independent foundations, demonstrating strong adaptability.

[0033] In one embodiment, the third opening 3021 includes a low opening 30211 with the same height as the first opening 2021 and the second opening 3011, and a high opening 30212 disposed above the low opening 30211.

[0034] like Figure 6 and Figure 7 As shown, the second inner template 302 has two layers of third openings 3021 along the height direction. The upper one is the high opening 30212, and the lower one is the low opening 30211. The high opening 30212 and the low opening 30211 are set one-to-one. Of course, the position and number of the third openings 3021 can be set to more layers according to actual needs, as long as the highest point of the third opening 3021 in the highest layer is lower than the highest point of the first inner template 301.

[0035] The low-hole 30211 ensures that the concrete in the lower layer of the second space 304 can smoothly enter the second cavity through the low-hole 30211, while the high-hole 30212 ensures that the concrete in the upper layer of the second space 304 can smoothly enter the second cavity through the high-hole 30212, thus improving the flow efficiency and flow uniformity of the concrete.

[0036] In one embodiment, both the first cavity prefabricated component 2 and the second cavity prefabricated component 3 include a strip template 5 and two corner templates 6 respectively disposed at both ends of the length direction of the strip template 5. The strip template 5 and the corner templates 6 are connected by a first connecting structure 7.

[0037] like Figure 4 and Figure 5 As shown, the first outer template 201 of the strip template 5 of the first cavity precast component 2 has no openings, while the second outer template 202 has multiple first openings 2021 spaced along its length. Similarly, the first outer template 201 of the corner template 6 of the first cavity precast component 2 has no openings, while the second outer template 202 has first openings 2021 spaced along its length. In this embodiment, the corner template 6 is an L-shaped template, but it can also be set as an arc-shaped template or other shapes according to actual construction needs; no specific restrictions are imposed here. Two corner templates 6 are spliced ​​together at both ends of the strip template 5 along its length through a first connecting structure 7 to form an outer edge of the foundation. In this embodiment, the foundation frame is composed of four strip templates 5 and four corner templates 6 spliced ​​together.

[0038] Similarly, such as Figure 6 and Figure 7 As shown, the first inner template 301 of the strip template 5 of the second cavity precast component 3 is provided with multiple second openings 3011 spaced apart along the length direction, and the second inner template 302 is provided with multiple third openings 3021 spaced apart along the length direction, with the third openings 3021 having upper and lower layers; similarly, the first inner template 301 of the corner template 6 of the second cavity precast component 3 is provided with multiple second openings 3011 spaced apart along the length direction, and the second inner template 302 has two layers of third openings 3021 spaced apart along the length direction. In this embodiment, the corner template 6 is an L-shaped template, but it can also be set as an arc-shaped template, etc., according to actual construction needs, and no specific limitation is made here. Two corner templates 6 are spliced ​​at both ends of the strip template 5 along the length direction through the first connecting structure 7 to form an inner edge of the foundation. The inner frame of the foundation in this embodiment includes four strip templates 5 and four corner templates 6 spliced ​​together. Of course, the number of strip templates 5 and corner templates 6 can also be determined according to actual construction needs, and no specific limitation is made here.

[0039] The first cavity prefabricated component 2 and the second cavity prefabricated component 3 are formed by splicing strip template 5 and corner template 6, which realizes modular production, facilitates transportation, reduces costs, and the corner module ensures the connection strength at the corner of the foundation.

[0040] In one embodiment, the first connecting structure 7 includes a protrusion 701 and a recess 702 disposed on the connecting surface of the strip template 5 and the corner template 6, wherein the protrusion 701 and the recess 702 overlap and cooperate with each other.

[0041] like Figure 4 and Figure 5As shown, the corner template 6 has an L-shaped recess 702 on its connecting surface, and the corresponding strip template 5 has a protrusion 701 that is centrally symmetrical to the recess 702 on its connecting surface. This way, when the corner template 6 and the strip template are joined, the recess 702 and the protrusion 701 cooperate to form a flat surface, ensuring that there is no leakage of grout during concrete pouring. Of course, the positions of the protrusion 701 and the recess 702 can be interchanged, and the first connecting structure 7 can also be a mortise and tenon structure; no specific restrictions are made here.

[0042] The overlapping arrangement of the protrusion 701 and the concave part 702 improves the connection efficiency of the strip template 5 and the corner template 6, while ensuring sealing performance and overall rigidity.

[0043] In one embodiment, a second support member 8 is provided in the second space 304, and the second support member 8 is adapted to be connected to the prefabricated cavity column 9.

[0044] The second support member 8 is located in the center of the second space 304. The setting of the second support member 8 facilitates the connection between the foundation and the precast hollow column 9, and improves the overall construction efficiency.

[0045] In one embodiment, the first supporting member 1 is a steel mesh, and the second supporting member 8 includes horizontal bars 801 and vertical bars 802 arranged perpendicularly to each other, as well as a first connecting bar 803, which is connected to both the horizontal bars 801 and the steel mesh.

[0046] like Figure 2 As shown, multiple horizontal bars 801 and vertical bars 802 are arranged in a cross pattern to form a steel cage. The first connecting bar 803 is spaced out between the vertical bars 802. The second supporting member 8 is connected to the first supporting member 1 through the first connecting bar 803. The connection method is simple, the cost is low, and the connection strength can be taken into account.

[0047] In one embodiment, the first connecting bar 803 includes a first portion connected to the transverse bar 801 and a second portion connected to the bottom steel mesh, the first portion and the second portion being perpendicular to each other.

[0048] The first connecting rib 803 comprises two mutually perpendicular parts, which are integrally formed and bent to form the required structure, thereby further improving construction efficiency while ensuring connection strength.

[0049] In one embodiment, the second support member 8 further includes a connector 804 adapted to be connected to the precast hollow column 9, the connector 804 being located at the top of the vertical rib 802.

[0050] like Figure 2 and Figure 8As shown, the precast hollow column 9 includes an externally mounted precast column 901 and an internally mounted column reinforcing bar 902. The column reinforcing bar 902 includes mutually perpendicular horizontal and vertical reinforcing bars. The bottom of the vertical reinforcing bars also has a joint, which is connected to the joint of the precast hollow column 9 via the joint 804 of the second support member 8, achieving a reliable connection between the two. Before pouring concrete, a protective sleeve can be installed on the joint 804 of the second support member 8 to prevent the threads on the joint 804 from being encased in concrete and affecting the installation effect. Connecting the precast hollow column 9 via the joint 804 saves on other connecting components, balancing construction efficiency and strength. Furthermore, the second support member 8 and the precast hollow column 9 can also be fixed by lapping vertical reinforcing bars. The use of the precast hollow column 9 reduces the fabrication and binding of on-site reinforcing bars; only the vertical reinforcing bars need to be connected, and the hollow column is fixed using tie bolts and diagonal supports before concrete pouring can proceed, significantly shortening the on-site construction cycle.

[0051] In one embodiment, the second cavity prefabricated component 3 is connected to the bottom steel mesh via a second connecting structure 306.

[0052] Multiple second connecting structures 306 are distributed along the circumference of the second cavity precast component 3. The setting of the second connecting structure 306 ensures that the position of the second cavity precast component 3 will not shift when the concrete is poured, thereby ensuring the construction quality of the entire foundation.

[0053] In one embodiment, the second connecting structure 306 includes a second connecting bar 3061 and a third connecting bar 3062 that are connected to each other. The second connecting bar 3061 is horizontally disposed on the inner wall of the first inner template 301 and the second inner template 302 near the bottom of the reinforcing mesh, and the other end of the third connecting bar 3062 is connected to the bottom of the reinforcing mesh.

[0054] like Figure 6 and Figure 7 As described, multiple clamping heads 3063 are pre-embedded on the inner walls of the first inner template 301 and the second inner template 302 near the bottom of the reinforcing mesh, i.e., at a lower position. The second connecting bar 3061 is horizontally clamped and fixed in the multiple clamping heads 3063. The third connecting bar 3062 includes a hook-shaped connecting part and a horizontal connecting part, which are welded and fixed. The other end of the hook-shaped connecting part is fixed to the second connecting bar 3061, and the horizontal connecting part is inserted into the bottom reinforcing mesh for fixation. The second connecting bar 3061 and the third connecting bar 3062 have simple structures, are easy to implement, and have low costs.

[0055] The specific construction method for the cavity formwork independent foundation provided in this embodiment is as follows: According to the design drawings, the first cavity prefabricated component 2 and the second cavity prefabricated component 3 are prefabricated.

[0056] Accurately mark the centerline, edge lines, and corner positions of the foundation on the foundation pad to ensure accurate foundation dimensions and location. Check the pad elevation to ensure the foundation bottom surface is flat.

[0057] First hollow precast component 2 and second hollow precast component 3 are sequentially installed at the edge and inside of the steel reinforcement mesh. During installation, the corner template 6 at the corner is installed first, followed by the adjacent strip template 5. The connection surface between the corner template 6 and the strip template 5 adopts any one of the following methods: double-sided close splicing, external close splicing with internal post-pouring strip sealing, or both internal and external post-pouring strip sealing. The first outer template 201 and the second outer module of the first hollow precast component 2 are fixed by right-angle supports 4, and a first tie member 203 is provided between them for fixation. The first inner template 301 and the second inner template 302 of the second hollow precast component 3 are fixed to the steel reinforcement mesh by a second connecting structure 306, and a second tie member 303 is provided between them for fixation.

[0058] Fine aggregate concrete with good fluidity is used to prepare the concrete to be poured to ensure that the concrete can flow fully through the openings in the formwork.

[0059] Based on the total amount of foundation concrete, pour in sections and layers to ensure even distribution of concrete on both sides of the formwork. This avoids uneven pressure on the formwork due to uneven stacking on one side. The lower concrete is stacked first to allow for initial setting, which helps to constrain the flow of the concrete at the base. Use an immersion vibrator for compaction. The vibrator should be inserted quickly and withdrawn slowly, with even insertion points. Avoid directly vibrating the openings inside the formwork to prevent blockage.

[0060] After the concrete has set, install the precast hollow column 9. Adjust the form and position tolerance of the precast hollow column 9 by using diagonal bracing. Then seal the manhole position and reinforce the formwork. Finally, pour the concrete for the precast hollow column 9.

[0061] After the concrete is poured, cover it with straw mats or plastic film for insulation and moisture retention within 12 hours, and the curing time shall not be less than 7 days.

[0062] Temporary reinforcement measures can only be removed once the concrete strength reaches 75% or more of the design strength.

[0063] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A cavity formwork independent foundation, characterized by, include: First supporting component (1); The first cavity prefabricated component (2) is disposed on the outer edge of the first support component (1). The first cavity prefabricated component (2) includes a first outer template (201) and a second outer template (202) spaced apart from the outside to the inside, and a first tie member (203) for connecting the first outer template (201) and the second outer template (202). The second outer template (202) encloses to form a first space (204). A first cavity (205) is formed between the first outer template (201) and the second outer template (202). The second outer template (202) is provided with a plurality of first openings (2021). The first openings (2021) connect the first cavity (205) and the first space (204). The second cavity prefabricated component (3) is spaced apart within the second outer template (202) and fixed to the first support component (1). The horizontal height of the second cavity prefabricated component (3) is higher than the horizontal height of the first cavity prefabricated component (2). The second cavity prefabricated component (3) includes a first inner template (301) and a second inner template (302) spaced apart from the outside to the inside, and a second tie member (303) for connecting the first inner template (301) and the second inner template (302). The second inner template (302) encloses to form a second space (304), and a second cavity (305) is formed between the first inner template (301) and the second inner template (302). The first inner template (301) is provided with a plurality of second openings (3011), and the second inner template (302) is provided with a plurality of third openings (3021). The second openings (3011) connect the second cavity (305) and the first space (204), and the third openings (3021) connect the second cavity (305) and the second space (304). The highest point of the first opening (3021) and the second opening (3011) is lower than the highest point of the first outer template (201), and at least some of the highest point of the third openings (3021) is higher than the highest point of the second opening (3011).

2. The cavitied formwork independent foundation of claim 1, wherein, The first opening (2021) and the second opening (3011) are fitted to the first support member (1) and are at the same height; the third opening (3021) includes a low hole (30211) at the same height as the first opening (2021) and the second opening (3011) and a high hole (30212) disposed above the low hole (30211).

3. The cavitied formwork independent foundation of claim 1, wherein, The first cavity prefabricated component (2) and the second cavity prefabricated component (3) both include a strip template (5) and two corner templates (6) respectively disposed at both ends of the length direction of the strip template (5). The strip template (5) and the corner templates (6) are connected by a first connecting structure (7).

4. The cavitympanel independent foundation of claim 3, wherein, The first connecting structure (7) includes a protrusion (701) and a recess (702) on the connecting surface of the strip template (5) and the corner template (6), and the protrusion (701) and the recess (702) overlap and cooperate with each other.

5. The independent foundation of a cavity template according to any one of claims 1 to 4, characterized in that The second space (304) is provided with a second support member (8), which is adapted to be connected to a precast cavity column (9).

6. The cavity template independent foundation according to claim 5, characterized in that, The first support member (1) is a steel mesh, and the second support member (8) includes horizontal bars (801) and vertical bars (802) arranged perpendicularly to each other, as well as a first connecting bar (803). The first connecting bar (803) is connected to both the horizontal bars (801) and the steel mesh.

7. The cavitymplate independent foundation of claim 6, wherein, The first connecting bar (803) includes a first part connected to the transverse bar (801) and a second part connected to the bottom steel mesh, the first part and the second part being perpendicular to each other.

8. The cavitymplate independent foundation of claim 6, wherein, The second support member (8) further includes a joint (804) adapted to be connected to the precast cavity column (9), the joint (804) being located at the top of the vertical rib (802).

9. The cavitymplate independent foundation of claim 6, wherein, The second cavity prefabricated component (3) is connected to the steel bottom mesh through the second connecting structure (306).

10. The cavitympanel independent foundation of claim 9, wherein, The second connection structure (306) includes a second connecting bar (3061) and a third connecting bar (3062) that are connected to each other. The second connecting bar (3061) is horizontally disposed on the inner wall of the first inner template (301) and the second inner template (302) near the bottom steel mesh. The other end of the third connecting bar (3062) is connected to the bottom steel mesh.

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