A column foot template bottom leakage prevention device

Abstract

The application discloses a kind of column foot formwork bottom leakage prevention devices in the field of building construction technology, including frame assembly, sealing waterproof assembly and compacting assembly and the structure such as component, frame assembly includes four groups of ring-shaped positioning frame enclosed, adjacent positioning frame is fastened by detachable connecting piece, frame assembly inside is provided with the accommodating groove extending along ring direction and upper and lower through-penetration;Sealing waterproof assembly includes flexible waterproof strip and the sealing strip being set to the both sides of flexible waterproof strip, flexible waterproof strip is laid in accommodating groove, and its head end portion is mutually nested and forms the sealing joint with coincident length, sealing strip is supported in the both sides of the top of accommodating groove, so that flexible waterproof strip is arranged into the annular filling cavity with top open;The application solves the problem that the existing column root leakage prevention device is poor in shape ability, it is difficult to deal with the leakage risk caused by uneven base, and the construction efficiency of traditional plugging mode is low, and the uneven sealing pressure leads to local defects of structure.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a leak-proof device for the bottom of column base formwork. Background Technology

[0002] In modern building construction, the concrete pouring at the connection between the column base and the foundation or floor is a crucial step in ensuring the quality of the main structure. To ensure pouring quality, it is usually necessary to install a bottom formwork or protective device around the column base to prevent grout or concrete from leaking through the gap between the bottom of the formwork and the ground during pouring. Existing column base anti-leakage operations are widely used in secondary pouring of building projects and in the leveling and fixing of steel and concrete columns. Their core objective is to establish a reliable closed barrier at the column base to withstand the lateral pressure generated during pouring and to ensure the density and structural strength of the concrete after it has solidified.

[0003] However, existing technologies generally suffer from poor leak-proof performance in practical applications. Firstly, the base surface at construction sites is typically rough and uneven. While sealing materials such as timber, sponge, or rubber strips possess some flexibility, current installation methods often rely on simple pressing or embedding, lacking an effective conformal pressure transmission mechanism. This makes it difficult to fully convert the material's deformation capacity into tight filling of irregular gaps. Under the lateral pressure of highly fluid concrete or grout, the sealing layer is prone to localized loosening, potentially leading to leakage. Secondly, existing sealing processes largely rely on manual filling with dry-hardened mortar or simple physical restraint, resulting in cumbersome construction procedures and difficulty in controlling the uniformity of sealing pressure along the circumference. Furthermore, if the sealing layer does not adhere tightly to the base surface, quality defects such as honeycomb, pitting, or internal voids may appear at the column base, not only wasting construction materials but also potentially adversely affecting the load-bearing capacity of the column base and the overall stability of the building structure. Therefore, those skilled in the art have provided a leak-proof device for the bottom of column base formwork to address the problems mentioned in the background. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of poor conformability of existing column base anti-leakage devices, difficulty in dealing with leakage risks caused by uneven base layers, and low construction efficiency and uneven sealing pressure leading to local structural defects in traditional sealing methods. Therefore, a column base formwork bottom anti-leakage device is proposed.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof device for the bottom of a column base formwork, comprising: The frame assembly includes four sets of positioning frames, which form a ring structure. Adjacent positioning frames are fastened together by detachable connectors. The frame assembly has a receiving groove that extends in the circumferential direction and runs vertically through the interior. A sealing and waterproofing component includes a flexible waterproof strip and sealing strips disposed on both sides of the flexible waterproof strip. The flexible waterproof strip is laid in a receiving groove, with its first and last ends nested together to form a sealing joint with overlapping lengths. The sealing strips are supported on both sides of the top of the receiving groove, so that the flexible waterproof strip is arranged as an annular filling cavity with an open top. The clamping assembly is detachably installed on the frame assembly. The clamping assembly includes a clamping frame and a pressing unit disposed on the clamping frame. The clamping frame is used to clamp the sealing strip, and the pressing unit is used to apply pressure to the filling material in the annular filling cavity, so that the flexible waterproof strip fits tightly against the inner wall of the receiving groove and the ground.

[0006] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The positioning frame includes a baffle that fits against the column base. The baffle is connected to a support frame via a diagonal brace. An inner baffle is fixed on the baffle, and an outer baffle corresponding to the inner baffle is fixed on the support frame. After the four positioning frames are enclosed, the inner baffle and the outer baffle together define a vertically through receiving groove.

[0007] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The clamping frame includes a clamping ring disposed above the inner and outer retaining frames. Mounting plates are integrally formed at two corners of the clamping ring. A first assembly plate that is detachably connected to the mounting plate is fixed on the outer retaining frame. A mounting bracket is fixed on the top of the clamping ring. A second assembly plate that is detachably connected to the mounting bracket is fixed on the retaining frame.

[0008] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The extrusion unit includes multiple sets of connecting plates mounted on the clamping ring via a hinged structure, and an extrusion plate connected to the ends of the multiple sets of connecting plates. The extrusion plate is snapped into the central through hole of the clamping ring and is detachably locked onto the clamping ring by fasteners to apply extrusion force to the filling material in the annular filling cavity.

[0009] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The fastener includes a support seat fixed to the extrusion plate. The support seat has two sets of fastening screws connected to its internal threads. The clamping ring is provided with a positioning seat that mates with the end of the fastening screw. By rotating the fastening screw and locking it with the positioning seat, the extrusion plate is fixed inside the clamping ring.

[0010] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: A sealing ring is provided on the outer periphery of the extrusion plate. When the extrusion plate is correspondingly engaged in the clamping ring, the outer wall of the sealing ring is in contact with the inner wall of the clamping ring.

[0011] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The connector includes angle irons that snap onto adjacent support frames. The angle irons are detachably connected to the two adjacent support frames by fixing bolts to achieve a fixed connection between adjacent positioning frames.

[0012] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The top of both the inner and outer enclosure frames is provided with mounting grooves for accommodating the sealing strip. After the four sets of positioning frames are enclosed, the mounting grooves on each positioning frame are interconnected, forming a ring-shaped installation channel that extends circumferentially and is used to place the sealing strip.

[0013] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: The receiving groove includes an inner ring groove and an outer ring groove that are spaced apart on the same horizontal plane, and the inner ring groove and the outer ring groove are connected by an oblique groove. The sealing strip switches from the inner ring groove to the outer ring groove through the oblique groove, so that the flexible waterproof strip is wrapped in the receiving groove to form a double-layer nested structure.

[0014] As a further description of the aforementioned anti-leakage device at the bottom of the column base formwork: Flexible waterproof strips are made of flexible polymer materials, including at least one of rubber, polyvinyl chloride, thermoplastic polyurethane, or silicone.

[0015] In summary, due to the adoption of the above-mentioned anti-leakage device for the bottom of column base formwork, the beneficial effects of this invention are: This device constructs a stable accommodating space through a frame assembly, which, together with the clamping assembly and extrusion unit, forms a controllable pressure transmission path. This allows the flexible waterproof strip, after being nested in rings, to receive uniform and sustained extrusion force, thus actively adapting to the undulations of the substrate and fully converting the deformation potential of the flexible material into a reliable seal. This effectively overcomes the defects of existing installation methods, such as loosening of the sealing layer and uneven pressure distribution due to a lack of effective pressure transmission. Simultaneously, the granular filling material within the annular filling cavity, under the pressure transmission of the extrusion unit, enables automatic leveling and dynamic filling of the gaps, further enhancing the sealing layer's conformability to irregular surfaces. Furthermore, the cleverly designed double-ring nested structure with angled slots upgrades the traditional single-layer seal to a double-layer defense, ensuring that even under extreme construction conditions, if the inner ring experiences slight leakage, the outer ring seal can still form an effective secondary barrier, creating a multi-layered sealing path. This significantly improves the reliability and redundancy of the leak-proof device, effectively eliminating common quality defects in concrete construction such as honeycomb, pitting, and root rot. This device excels in both ease of construction and cost-effectiveness, possessing significant engineering application value. Existing sealing techniques often rely on manual filling with dry, hardened mortar, simple physical restraint, or disposable timber sealing, resulting in cumbersome procedures, substantial material waste, and difficulty in controlling the uniformity of sealing pressure along the circumference. This invention employs a modular positioning frame and detachable connectors, combined with the detachable and assembleable relationship between the frame components and the clamping components, enabling rapid assembly, precise adjustment, and efficient disassembly. Core components such as the positioning frame, clamping frame, and extrusion unit are all reusable. This recyclable structural design effectively reduces construction costs, improves formwork installation efficiency, and better meets the modern construction requirements for green, energy-saving, and high-quality projects. In summary, this invention demonstrates significant technological advancement and promotional value in terms of leak-proof sealing performance, environmental adaptability, and construction economy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the sealing and waterproofing component and the frame component of the present invention; Figure 4 This is a bottom view of the structural assembly of the sealing and waterproofing component and the frame component of the present invention; Figure 5 This is a schematic diagram of the assembly of the frame component structure of the present invention; Figure 6 This is a first schematic diagram of the frame assembly and clamping assembly structure of the present invention; Figure 7 This is a second schematic diagram of the frame assembly and clamping assembly structure of the present invention; Figure 8 This is a schematic diagram of the clamping component structure of the present invention.

[0017] Legend: 10. Frame components; 101. Positioning frame; 1011. Baffle; 1012. Diagonal brace; 1013. Support frame; 1014. Inner enclosure frame; 1015. Outer enclosure frame; 102. Connector; 1021. Angle iron; 1022. Fixing bolts; 11. Receiving groove; 12. Annular filling cavity; 14. Sealing ring; 20. Sealing and waterproofing components; 201. Flexible waterproof strip; 202. Sealing strip; 30. Clamping assembly; 301. Clamping frame; 3011. Clamping ring; 3012. Mounting plate; 3013. First assembly plate; 3014. Mounting bracket; 3015. Second assembly plate; 302. Extrusion unit; 3021. Connecting plate; 3022. Extrusion plate; 3023. Fastener; 30231. Support base; 30232. Fastening screw; 30233. Positioning seat; 40. Installation groove; 401. Inner ring groove; 402. Outer ring groove; 403. Angled groove. Detailed Implementation

[0018] The following will describe, with reference to the accompanying drawings of the embodiments of the present invention, a clear and complete anti-leakage device for the bottom of a column base formwork according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-8 As shown, the present invention provides a leak-proof device for the bottom of a column base template, comprising a frame assembly 10, a sealing and waterproofing assembly 20, and a clamping assembly 30, etc. The frame assembly 10 includes four sets of positioning frames 101, which form a ring structure. In this embodiment, taking a rectangular column base as an example, four sets of positioning frames 101 are correspondingly provided. For a triangular column base, three sets can be provided. For other structural column bases, those skilled in the art can configure them accordingly to meet construction requirements. The positioning frames 101 are respectively fitted and installed on the four sides of the column base template. Adjacent positioning frames 101 are fastened together by detachable connectors 102. The frame assembly 10 has a receiving groove 11 extending circumferentially and penetrating vertically inside. The sealing and waterproofing assembly 20 includes a flexible waterproof strip 201 and sealing strips 202 disposed on both sides of the flexible waterproof strip 201. The flexible waterproof strip 201 is laid in the receiving groove 11, with its ends nested together to form a sealing joint with overlapping lengths. The sealing strips 202 are supported on the top sides of the receiving groove 11, allowing the flexible waterproof strip to... The annular filling cavity 12 with an open top is arranged as 201; the clamping assembly 30 is detachably installed on the frame assembly 10. The clamping assembly 30 includes a clamping frame 301 and an extrusion unit 302 disposed on the clamping frame 301. The clamping frame 301 is used to clamp the sealing strip 202, and the extrusion unit 302 is used to apply pressure to the filling material in the annular filling cavity 12. The filling material in the annular filling cavity 12 can be fine sand, cement mortar powder, etc., so that the flexible waterproof strip 201 is tightly attached to the inner wall of the receiving groove 11 and the ground.

[0020] During installation, four sets of positioning frames 101 are first arranged around the column base, and each positioning frame 101 is fastened into an integrated annular frame assembly 10 by detachable connectors 102. At this time, the vertically penetrating receiving groove 11 formed inside the positioning frame 101 provides a stable working space for subsequent leak-proof construction. By laying the flexible waterproof strip 201 along the receiving groove 11 and nesting its ends to form a sealing joint with overlapping lengths, the potential for leakage caused by joint problems can be effectively eliminated. Together with the sealing strips 202 set on both sides of the top of the receiving groove 11, a stable annular filling cavity 12 is constructed, thereby ensuring the continuity and integrity of the entire leak-proof barrier.

[0021] Once the device is positioned, the anti-leakage compaction operation can be carried out using the clamping assembly 30. First, the clamping frame 301 is movably connected to the frame assembly 10. By applying downward pressure through the clamping frame 301, the sealing strip 202 above the receiving groove 11 is tightly locked, achieving the initial positioning and sealing of the anti-leakage device. Subsequently, filling material (such as fine sand or cement mortar powder and other granular substances) is added into the annular filling cavity 12. After the annular filling cavity 12 is filled with material, the extrusion unit 302 set on the clamping frame 301 can be used to apply extrusion pressure to the filling material. Under the pressure, the originally loose filling material will squeeze the flexible waterproof strip 201 so that its outer side quickly adheres to and fills the inner wall of the receiving groove 11 and forms a dense stress layer. Since the granular material has good pressure transmission characteristics and fluidity, it can automatically conform to the shape and compensate for the slight unevenness between the ground and the positioning frame 101, forcing the flexible waterproof strip 201 at the bottom to not only adhere tightly to the inner wall of the receiving groove 11, but also to accurately adhere to the irregular base ground, thereby constructing a physical barrier.

[0022] This leak-proof device effectively combines flexible bonding with rigid compression. Through the nested structure of the flexible waterproof strip 201 and the pressure compensation of the granular filler, the flexible waterproof strip 201 can be made of flexible polymer materials, including at least one of rubber, polyvinyl chloride, thermoplastic polyurethane, or silicone. This leak-proof device can automatically adapt to complex and changing construction environments, overcoming the technical shortcomings of traditional rigid sealing materials that struggle to fill ground gaps. During the pouring of high-flowability concrete or grout, the filling layer can uniformly absorb and transmit lateral pressure, effectively blocking mortar leakage paths, significantly improving the pouring quality at the column base, and avoiding common quality defects such as honeycomb and pitted surfaces. Furthermore, because the entire device adopts a detachable design, it can be recycled after construction by removing the connector 102, greatly reducing construction costs.

[0023] In one embodiment, such as Figures 1-7As shown, specifically, the positioning frame 101 includes a baffle 1011 fitted to the column base. The baffle 1011 is connected to a support frame 1013 via a diagonal brace 1012. An inner enclosure baffle 1014 is fixed on the baffle 1011, and an outer enclosure baffle 1015 corresponding to the inner enclosure baffle 1014 is fixed on the support frame 1013. After the four sets of positioning frames 101 are enclosed, the inner enclosure baffle 1014 and the outer enclosure baffle 1015 together define a vertically penetrating receiving groove 11. The components of the positioning frame 101 are preferably made of high-strength steel. The connection method between the components can be selected according to the processing requirements, such as welding, bolting, or riveting, to achieve a stable connection, so as to ensure the structural strength and deformation resistance of the frame during construction and application.

[0024] The frame assembly 10 achieves efficient structural support and functional space division. The baffle 1011 of the positioning frame 101 is connected to the outer support frame 1013 through a stable diagonal brace 1012, forming a support system with high bending and torsional resistance, ensuring that the device maintains shape stability when subjected to grouting lateral pressure. An inner enclosure baffle 1014 is welded or fixed on the baffle 1011, and an outer enclosure baffle 1015 is correspondingly provided on the support frame 1013. When the four sets of positioning frames 101 are assembled together, the inner enclosure baffle 1014 and the outer enclosure baffle 1015 jointly define and form the side wall space of the receiving groove 11. During the concrete pouring process of the column, this side wall space can provide stable lateral restraint and support for the flexible waterproof strip 201 and its internal filling material, effectively resisting the huge lateral pressure generated by concrete pouring, thereby preventing grout leakage caused by frame deformation or sealing failure.

[0025] Based on the above embodiments, such as Figures 1-6 and Figure 8 As shown, specifically, the clamping frame 301 includes a clamping ring 3011 disposed above the inner enclosure frame 1014 and the outer enclosure frame 1015. Mounting plates 3012 are integrally formed at two corners of the clamping ring 3011. A first assembly plate 3013 that is detachably connected to the mounting plate 3012 is fixed on the outer enclosure frame 1015. A mounting bracket 3014 is fixed on the top of the clamping ring 3011. A second assembly plate 3015 that is detachably connected to the mounting bracket 3014 is fixed on the baffle 1011.

[0026] The clamping ring 3011 is placed on the corresponding inner enclosure frame 1014 and outer enclosure frame 1015. The mounting plate 3012 is fastened to the first assembly plate 3013 and the mounting frame 3014 is fastened to the second assembly plate 3015 by bolts. The clamping ring 3011 is horizontally arranged above the inner enclosure frame 1014 and outer enclosure frame 1015. The downward clamping action of the clamping ring 3011 directly acts on the sealing strip 202, which not only achieves a stable lock on the sealing strip 202, but also ensures the positional stability of the side wall of the flexible waterproof strip 201 during the filling operation, thereby providing reliable boundary support for the material filling of the annular filling cavity 12.

[0027] To achieve the compression of the material inside the annular filling cavity 12, the extrusion unit 302 specifically includes multiple sets of connecting plates 3021 mounted on the compression ring 3011 via a hinge structure. The compression ring 3011 is welded with corresponding hinge seats, which are hinged to the connecting plates 3021 via cylindrical pins. The extrusion plate 3022 is connected to the ends of the multiple sets of connecting plates 3021. The extrusion plate 3022 is snapped into the central through hole of the compression ring 3011, and the extrusion plate 3022 is detachably locked to the compression ring 3011 by fasteners 3023, so as to apply extrusion force to the filling material inside the annular filling cavity 12. Correspondingly, the fastener 3023 includes a support seat 30231 fixed on the extrusion plate 3022. The support seat 30231 is internally threaded with two sets of fastening screws 30232. The clamping ring 3011 is provided with a positioning seat 30233 that cooperates with the end of the fastening screw 30232. By rotating the fastening screw 30232 and locking it with the positioning seat 30233, the extrusion plate 3022 is fixed in the clamping ring 3011.

[0028] The compression plate 3022 can be easily flipped on top of the clamping ring 3011, allowing construction personnel to quickly flip and snap it into the central through hole of the clamping ring 3011 after pouring fine sand or mortar powder into the cavity. The size of the compression plate 3022 is adapted to the through hole, ensuring that it can evenly cover the upper area of ​​the filling cavity during the pressing process, thus forming an integral compression force-bearing surface. In the clamping and locking stage, the fastener 3023 plays a key role in fixing and pressurizing. Through the support seat 30231 set on the compression plate 3022, the construction personnel can drive two sets of fastening screws 30232 to cooperate with the positioning seat 30233 on the clamping ring 3011. When the fastening screws 30232 are rotated, their ends will be firmly embedded in the positioning seat 30233 and generate axial locking force, thereby firmly locking the compression plate 3022 in the clamping ring 3011 and continuously applying a constant compressive force to the filling material in the cavity.

[0029] Mechanical extrusion allows the filling material to quickly expel internal air and achieve a highly dense state, eliminating the risk of secondary settlement caused by voids. This ensures that the flexible waterproof strip 201, under extrusion pressure, not only fits tightly against the inner wall of the receiving groove 11 but also achieves optimal sealing contact with irregular ground surfaces, thus completely blocking the leakage path of the grouting material and significantly improving the overall construction quality at the column base. Furthermore, a sealing ring 14 is provided on the outer periphery of the extrusion plate 3022. When the extrusion plate 3022 is correspondingly engaged within the compression ring 3011, the outer wall of the sealing ring 14 fits against the inner wall of the compression ring 3011. It can enhance the sealing performance at the snap connection between the compression ring 3011 and the extrusion plate 3022, effectively preventing the filling material from overflowing through the gap during the filling process. At the same time, it also provides a buffer margin for the extrusion plate 3022, enabling it to more stably transmit the extrusion force to the filling material in the annular filling cavity 12 when performing the locking operation, thereby further ensuring the tightness and sealing reliability of the overall structure of the leak-proof device.

[0030] In one embodiment, such as Figures 1-4 As shown, specifically, the connector 102 includes an angle iron 1021 that snaps between adjacent support frames 1013. The angle iron 1021 is detachably connected to the two adjacent sets of support frames 1013 by fixing bolts 1022 to achieve a fixed connection between adjacent positioning frames 101. Assembling adjacent frame components 10 using angle iron 1021 and fixing bolts 1022 is highly convenient and facilitates the quick assembly and disassembly of the anti-leakage device at the bottom of the column base template.

[0031] like Figures 1-6 As shown, to ensure the installation accuracy and sealing stability of the sealing strip 202, the tops of both the inner enclosure frame 1014 and the outer enclosure frame 1015 are provided with mounting grooves 40 for accommodating the sealing strip 202. After the four sets of positioning frames 101 are enclosed, the mounting grooves 40 on each positioning frame 101 are interconnected, forming a ring-shaped installation channel extending circumferentially for placing the sealing strip 202. The mounting grooves 40 are set on the top of each enclosure frame as mounting slots for the sealing strip 202. When the four sets of positioning frames 101 are enclosed into a closed frame assembly 10 on the construction site, the mounting grooves 40 on each enclosure frame can smoothly connect end to end and communicate with each other, thereby constructing a ring-shaped installation channel that extends continuously circumferentially around the column base.

[0032] By utilizing the constraint force of the groove wall of the mounting groove 40, the sealing strip 202 can be precisely positioned on the predetermined trajectory, effectively preventing the sealing strip 202 from shifting, twisting, or falling off during subsequent installation and grouting. The mounting groove 40 not only greatly simplifies the laying process of the sealing strip 202 and ensures the uniformity and continuity of the sealing interface along the entire circumference of the column base, but also provides a solid physical support surface for the subsequent pressure application of the clamping component 30 to the sealing strip 202 by firmly wrapping it. This effectively eliminates the risk of leakage caused by poor contact between the sealing strip 202 and the retainer, thereby greatly improving the sealing reliability and engineering application safety of the leak-proof device in complex construction environments.

[0033] To achieve a sealed joint with overlapping lengths after the flexible waterproof strip 201 is installed, the receiving groove 11 includes an inner ring groove 401 and an outer ring groove 402 that are spaced apart on the same horizontal plane. The inner ring groove 401 and the outer ring groove 402 are connected by an oblique groove 403. The sealing strip 202 is switched from the inner ring groove 401 to the outer ring groove 402 through the oblique groove 403, so that the flexible waterproof strip 201 is wound into a double-layer nested structure in the receiving groove 11. In order to achieve efficient sealing of the flexible waterproof strip 201 and construct multiple seepage barriers, during installation, the construction personnel start laying the flexible waterproof strip 201 from the inner ring groove 401. When it reaches a specific position, the flexible waterproof strip 201 is smoothly switched from the inner ring to the outer ring groove 402 by the guiding action of the inclined groove 403, and continues to be laid. Finally, a double-ring nested structure with concentric inner and outer rings is formed on the top of the frame component 10, so that the flexible waterproof strip 201 can be laid in two layers in the receiving groove 11.

[0034] The transition design of the oblique groove 403 overcomes the technical problem of grout leakage caused by damage to the end interface or installation displacement of the traditional single-ring sealing strip 202. On the one hand, the double-layer nested structure significantly extends the path of grout leakage. Even if there is a small gap in the inner ring seal, the outer ring seal can form an effective secondary barrier, thus significantly enhancing the sealing reliability of the bottom of the column base formwork through the double sealing interface. On the other hand, by nesting the flexible waterproof strip 201, it not only helps to ensure that the sealing strip 202 fits tightly with the groove in all directions, but also helps to improve the wear resistance and leakage prevention performance of the bottom of the flexible waterproof strip 201. The entire leakage barrier exhibits excellent structural stability and impact resistance when subjected to grouting pressure, ensuring the tightness and quality of column base grouting operations in complex construction environments.

[0035] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technology and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A leak-proof device for the bottom of a column base formwork, characterized in that, include: The frame assembly (10) includes four sets of positioning frames (101), which form a ring structure. Adjacent positioning frames (101) are fastened together by detachable connectors (102). The frame assembly (10) has a receiving groove (11) that extends in the circumferential direction and runs through the top and bottom. The sealing and waterproofing component (20) includes a flexible waterproof strip (201) and sealing strips (202) disposed on both sides of the flexible waterproof strip (201). The flexible waterproof strip (201) is laid in the receiving groove (11), and its ends are nested together to form a sealing joint with overlapping lengths. The sealing strips (202) are supported on the top sides of the receiving groove (11), so that the flexible waterproof strip (201) is arranged as an annular filling cavity (12) with an open top. The clamping assembly (30) is detachably installed on the frame assembly (10). The clamping assembly (30) includes a clamping frame (301) and an extrusion unit (302) disposed on the clamping frame (301). The clamping frame (301) is used to clamp the sealing strip (202). The extrusion unit (302) is used to apply pressure to the filling material in the annular filling cavity (12) so that the flexible waterproof strip (201) fits tightly against the inner wall of the receiving groove (11) and the ground.

2. The anti-leakage device at the bottom of the column base formwork according to claim 1, characterized in that: The positioning frame (101) includes a baffle (1011) that fits against the column base. The baffle (1011) is connected to a support frame (1013) via a diagonal brace (1012). An inner enclosure baffle (1014) is fixed on the baffle (1011), and an outer enclosure baffle (1015) corresponding to the inner enclosure baffle (1014) is fixed on the support frame (1013). After the four positioning frames (101) are enclosed, the inner enclosure baffle (1014) and the outer enclosure baffle (1015) together define a vertically penetrating receiving groove (11).

3. The anti-leakage device at the bottom of the column base formwork according to claim 2, characterized in that: The clamping frame (301) includes a clamping ring (3011) disposed above the inner enclosure frame (1014) and the outer enclosure frame (1015). Mounting plates (3012) are integrally formed at two corners of the clamping ring (3011). A first assembly plate (3013) that is detachably connected to the mounting plate (3012) is fixed on the outer enclosure frame (1015). A mounting bracket (3014) is fixed on the top of the clamping ring (3011). A second assembly plate (3015) that is detachably connected to the mounting bracket (3014) is fixed on the baffle (1011).

4. A leak-proof device for the bottom of a column base formwork according to claim 3, characterized in that: The extrusion unit (302) includes multiple sets of connecting plates (3021) mounted on the clamping ring (3011) by a hinge structure, and an extrusion plate (3022) connected to the ends of the multiple sets of connecting plates (3021). The extrusion plate (3022) is snapped into the central through hole of the clamping ring (3011), and the extrusion plate (3022) is detachably locked to the clamping ring (3011) by fasteners (3023) to apply extrusion force to the filling material in the annular filling cavity (12).

5. A leak-proof device for the bottom of a column base formwork according to claim 4, characterized in that: The fastener (3023) includes a support seat (30231) fixed on the extrusion plate (3022). The support seat (30231) is internally threaded with two sets of fastening screws (30232). The clamping ring (3011) is provided with a positioning seat (30233) that cooperates with the end of the fastening screw (30232). By rotating the fastening screw (30232) and locking it with the positioning seat (30233), the extrusion plate (3022) is fixed in the clamping ring (3011).

6. A leak-proof device for the bottom of a column base formwork according to claim 4, characterized in that: A sealing ring (14) is provided on the outer periphery of the extrusion plate (3022). When the extrusion plate (3022) is correspondingly engaged in the clamping ring (3011), the outer side wall of the sealing ring (14) is in contact with the inner side wall of the clamping ring (3011).

7. A leak-proof device for the bottom of a column base formwork according to claim 2, characterized in that: The connector (102) includes an angle iron (1021) that snaps between adjacent support frames (1013). The angle iron (1021) is detachably connected to the two adjacent support frames (1013) by fixing bolts (1022) to achieve a fixed connection between adjacent positioning frames (101).

8. A leak-proof device for the bottom of a column base formwork according to any one of claims 2-7, characterized in that: The top of both the inner enclosure (1014) and the outer enclosure (1015) is provided with mounting grooves (40) for accommodating the sealing strip (202). After the four sets of positioning frames (101) are enclosed, the mounting grooves (40) on each positioning frame (101) are interconnected and together form a ring-shaped mounting channel that extends in the circumferential direction and is used to place the sealing strip (202).

9. A leak-proof device for the bottom of a column base formwork according to claim 8, characterized in that: The receiving groove (11) includes an inner ring groove (401) and an outer ring groove (402) arranged at intervals on the same horizontal plane, and the inner ring groove (401) and the outer ring groove (402) are connected by an oblique groove (403). The sealing strip (202) is switched from the inner ring groove (401) to the outer ring groove (402) through the oblique groove (403), so that the flexible waterproof strip (201) is wrapped in the receiving groove (11) to form a double-layer nested structure.

10. A leak-proof device for the bottom of a column base formwork according to claim 8, characterized in that: The flexible waterproof strip (201) is made of a flexible polymer material, which includes at least one of rubber, polyvinyl chloride, thermoplastic polyurethane or silicone.

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